1

SEM-I QUESTION BANK

SUBJECT: Engineering Chemistry

Unit I- Water Technology Year

Q.1. a) Calculate the amount of Lime and soda required to soften 1, 00,000

liters of water containing following impurities, Ca(HCO3 )2 =121.5

ppm, Mg(HCO3 )2 =219ppm, CaSO4 =6.8ppm, MgCl2=142.5 ppm,

CO2=44ppm and Al2(SO4)3 as a coagulant at the rate of 17.1 ppm.

Win-2012

8 M

b) A Zeolite Softener was completely exhausted and was regenerated by

passing 100 liters of Sodium Chloride Solution Containing 110 gm/l

of NaCl. How many liters of water containing 400 ppm hardness can

be soften using this softener.

Win-2012

4 M

c) Calculate the amount of Lime ( 80 % pure) and soda (90% Pure

)required for treatment of 50,000 liters of water whose analysis is as

follows in ppm, Ca(HCO3 )2 =40.5 ppm, Mg(HCO3 )2 =18.5ppm,

CaSO4 =68ppm, MgSO4 =50, CaCl2=38.8 ppm, H2SO4= 98.

Sum-2013 8 M

d) A Zeolite Softener was completely exhausted when 10,000 liters of

hard water was passed through it. The softener required 200 liters of

3.5% NaCl Solution for regeneration of exhausted Zeolite bed.

Calculate the Hardness of water.

Sum-2013 4 M

e) Calculate temporary and permanent hardness along with the amount

of Lime (90%) and Soda (95%) required for softening of 80,000L of

water using NaAlO2 at the rate of 16.4 mg/L, with the following

impurities (all are in ppm)

Ca(HCO3)2 =80 ; Mg(HCO3)2 =73

NaCl =59.5 ; Mg(NO3)= 74

CaCl2=45

Win-2013 1+7

f) Calculate the amount of lime (85% pure) and soda (90% pure)

required to soften 5,00,000 liters of water using FeSO4.7H2O as a

coagulant at the rate of 69.5 ppm, with the following impurities (in

ppm): Ca(HCO3)2 =81 ; CaCl2=111; Mg(HCO3)2 =73; MgSO4= 90;

NaCl =72

Also calculate the carbonate and non-carbonate hardness.

Sum-2015 4M

g) Water contains following impurities in ppm:

Ca(HCO3)2 =75 ; Mg(HCO3)2 =73

CaCl2=95 ; MgSO4= 30 , CO2 =20

Calculate the amount of lime (85% pure) and soda (95% pure)

required to soften 2,50,000 liters of water using sodium aluminate as

a coagulant at the rate of 16.4 ppm

Win-2015 8M

2

h) What are Scales? What are the causes and disadvantages of Scale?

How are they formed?

Win-2012

Sum-2013

Sum-2015

4 M

4 M

i) How water can be sterilized by chlorine? Explain break point

Chlorination.

Win-2012

Sum-2014

Sum-2017

4 M

4M

4M

j) What is the purpose of internal treatment for Boiler water? Explain

Phosphate Conditioning.

Win-2012 4 M

k) Explain with Chemical equation the demineralization of hard water

and regeneration of ion exchange resin.

Sum-2013 4 M

l) What is Caustic Embrittlement? Discuss its advantages and

preventive measures.

Sum-2013

Sum-2014

4M

4M

m) Define sterilization. Explain sterilization by using Ozone and UV

radiations.

Win-2013 4 M

n) Explain desalination by Electro-dialysis process. Win-2015 4M

o) Calculate Quantity of Lime & Soda required for softening 2,00,000

lit of water using

16.4ppm of NaA102. Result of analysis of raw water & softened

water are as follows.

Raw Water Softened Water

Ca2+ 160ppm CO32- 30ppm

Mg2+ 72ppm OH- 17ppm

HCO3- 732ppm

Diss. CO2 44ppm

Sum-2016 8M

p) Define sterlisation ? Explain sterlisation using bleaching powder with

its merits and demerits.

Sum-2016 4M

q) Calculate the quantities of Lime (85 % pure) and soda (90 % pure)

required for the treatment of 1.2 Millions Litre of water containing

following salts:

Mgcl2 37.5ppm. NaHCO3 42 ppm, CaSO4 68.ppm., Cacl2 27. 75

ppm., Mg (HCO)2 73ppm, Ca (HCO3)2 81ppm.

Coagulant used is Al2 SO43 at the rate of 11.4ppm

Win-2016 8 M

r) What is the purpose of internal treatment of boiler water? Discuss

phosphate conditioning and explain why it is preferred over carbonate

conditioning in high pressure boiler?

Win-2016 4 M

s) A water sample contains following imparities in ppm

Mg(HCO3)2- 36.5, CaSO4= 54.4, CaCl2 =55.5, MgCl2 =57,

MgSO4 =90, NaHCO3 =58.5, NaCl =25.5

Calculate the quantities of lime (90% pure) and soda (85%

pure) required for softening of

75,000 litres of water using NaAlO 2 as a coagulant @ 16.4 ppm.

Sum-2017 8M

t) Calculate :

i) Temporary and permanent hardness for the given water sample.

Win-2017 8M

3

ii) Also calculate the amount lime (86%) and soda (83%) required for

softening 1

million litres of water with the following impurities (all are in mg/L)

MgCO3 = 84; Ca(HCO3)2 = 40; SiO2 = 10

Mg(NO3)2 = 37; CaSO4 = 272; MgSO4 = 120

H2SO4 = 49; Al2(SO4)3 = 17.1

u) Write a short note on softening of water by Demineralization process. Win-2017 4M

v) Calculate the quantities of lime (80%) and soda (85%) required for

treatment of 75,000 L of water with following salts using Al2(SO4)3

as a coagulant at the rate of 40 ppm. Ca(HCO3)2 =42ppm,

Mg(HCO3)2= 20ppm, CaSO4 =68ppm, CaCl2 =11.1ppm, MgSO4

=50pm

Sum-2018 8 M

w) Discuss boiler corrosion. Sum-2018 4 M

x) A water sample on analysis gave following data in ppm-

Ca(HCO3)2=81, Mg(HCO3)2=73, MgSO4=240, CO2=88,

NaCl=58.8. calculate total cost of lime (93% pure) & soda(97%pure)

required to soften 2 million liters of water if cost of lime and soda Rs.

350 and Rs.4200 per 100 kg.

Win-2018 8M

y) How corrosion in boiler caused due to dissolved oxygen and how it

can be removed.

Win-2018 4M

z) A water sample, on analysis gave the following data:

MgCl2- 95ppm, CaSO4 -272ppm, MgSO4 -120ppm, H2 SO4- 49ppm,

SiO2 -4ppm

Calculate the amount of lime (95% pure) and soda (97% pure)

required for treatment of 1million litres of water. If the cost of lime &

soda are Rs. 400 & Rs. 3000per 100 kg each respectively, calculate

the total cost of chemicals used for treatment of 1 million litres of

water.

Sum-2019 8 M

aa) What is the purpose of internal treatment for boiler water? Explain

phosphate conditioning.

Sum-2019 4 M

Q 2. a) The total hardness of 10,000 Lts. of water was completely removed

by Zeolite softener. It required 30Lts of NaCl solution containing

8.5% NaCl for regeneration. Calculate the hardness of water sample.

Win-2013 4 M

b) Calculate the amount of Lime and soda required to soften 80,000

liters of water containing following impurities

Ca++ =120 ppm, Mg++ =60ppm, dissolved CO2=44ppm,

HCO¯3=300ppm. The purity of lime is 90% and Soda is 95%.

FeSO4.7H2O is used as a coagulant @27.8 ppm

Sum-2014 8 M

c) Calculate the amount of Lime and soda required to soften 80,000

liters of water with the following analysis using 10 ppm of sodium

Aluminate as a coagulant, Ca(HCO3 )2 =81 ppm, Mg(HCO3 )2 =146

ppm, CaCl2=33.3, MgCl2- 38 ppm CaSO4 =68ppm

Win-2014 8 M

d) What are the causes of scale and sludge formation? Discuss its Win-2013 4 M

4

disadvantages. Sum-2017 4 M

e) Explain Desalination of brackish water by Reverse Osmosis. State its

limitations and advantages.

Win-2013

Sum-2014

4 M

f) A Zeolite bed was exhausted on passing 10,000 liters of water sample

through it. The Zeolite required 200 liters of 3.6% NaCl solution for

regeneration. Calculate the hardness of water sample.

Sum-2014 4 M

g) How corrosion in boiler is caused due to dissolved gases? How it can

be removed chemically?

Win-2014 4 M

h) Define the process ‘ de-salination ’? How the desalination of water is

carried out by electro-dialysis process?

Win-2014 4 M

i) An exhausted Zeolite softener was regenerated by passing 200 liters

of NaCl solution having the strength of 10 g/l of NaCl. Find the total

volume of water that can be softened by this softener, if the hardness

of water is 300 ppm.

Win-2014 4 M

j) Explain briefly tertiary treatment methods used in waste water

treatment.

Win-2014 4 M

k) A zeolites softener was exhausted on passing hard water containing

450 ppm of hardness. The exhausted zeolites bed was regenerated

completely on passing 290 liters of NaCl solution containing 6%

NaCl. Calculate the quantity of hard water that was softened using

this softener.

Sum-2015 3M

l) Write short notes on:

(i). Caustic embrittlement

(ii). Phosphate conditioning

(iii). Chlorination of water

Sum-2015 3M

m) A Zeolite softener was exhausted on passing 20,000 liters of water

sample through it. The Zeolite required 150 liters of 5.5% NaCl

solution for regeneration, calculate the hardness of water sample.

Win-2015 3M

n) Write short notes on: (any three)

1. Break point chlorination and its significance.

2. Tertiary treatment of waste water to reduce water pollution.

3. Causes and disadvantages of scale formation..

4. Carbonate and phosphate conditioning.

Win-2015 9 M

o) A zeolite softener was completely exhausted when 10,000 lit of water

sample was passed through it. If it requires 300 lit of 2.6% NaCl

solution for complete regeneration. Calculate hardness of water

sample.

Sum-2016 4M

p) How corrosion in boiler caused due to dissolve oxygen & How it can

be removed chemically & mechanically ?

Sum-2016 4M

q) Distinguish between Zeolite & Ion exchange process ? Sum-2016 4M

r) A zeolite was completely exhausted by passing 20,000 litres of water Win-2016 3 M

5

through it If the zeolite requires 150 litres of 3.5 % NaCl solution for

complete regeneration. Calculate the hardness of the water sample.

s) Write a short note on any three.

i) Chlorination of water.

ii) Caustic embrittlement.

iii) Tertiary Treatment.

iv) Desalination of sea water by Electro-dialysis process.

Win-2016 9 M

t) A Zeolite softener was exhausted by passing 20,000 litres of hard

water through it. If the zeolite requires 300 litres of 2.5% NaCl

solution for regeneration. [3 M] [I]

Calculate the hardness of water.

Sum-2017 3M

u) Write a note on Desalination of sea water using - Electrodialysis and

Reverse osmosis process.

Sum-2017 5M

v) The total hardness of 10,000 litre of water was completely removed

by zeolite process. If

30 litres of NaCl solution containing 8.5% NaCl is used for

regeneration process.

Calculate the hardness of water.

Win-2017 4M

w) Phosphate conditioning is better than carbonate conditioning. Explain Win-2017 5M

x) Differentiate between Limesoda, zeolite and Deionization process

with respect to their

principles, advantages and limitations.

Win-2017 3M

y) A zeolite bed was completely exhausted by passing 15,000 L of water

sample through it. If the zeolite requires 180 L of 2.5% NaCl solution

for complete regeneration then calculate the hardness of water

sample

Sum-2018 3M

z) Write short note on any three.

i) Break point chlorination.

ii) Causes and disadvantages of scale formation.

iii) Tertiary treatment of wastewater.

iv) Caustic embrittlement.

Sum-2018 9M

aa) A zeolite bed was completely exhausted by passing 10,000 L of water

sample through it. If the zeolite requires 300 L of 2.6% NaCl solution

for complete regeneration then calculate the hardness of water

sample

Win-2018 4M

bb) Explain desalination of breaking water by reverse osmosis. State ita

limitations and advantages.

Win-2018 4M

cc) What is caustic embrittlement? Discuss preventive measures to

reduce it.

Win-2018 4M

dd) A zeolite Softner was exhausted by removing the hardness

completely when 5000 litres of water is passed through it. The

exhausted Zeolite bed then required 150 litres of 8% NaCl solution

for complete regeneration. Calculate the hardness of water sample.

Sum-2019 4M

ee) What is Stenlization of water? Explain the break point chlorination. Sum-2019 5M

6

ff) Explain with chemical equations the demineralization of hard water

& regeneration of ion exchange Resins.

Sum-2019 3M

Unit II - Corrosion

Q.3. a) What is cathodic Protection for controlling corrosion? How it is to be

achieved by sacrificial anode method?

Win-2012

Sum-2015 4M

b) Write short notes on ( any Two)

(i) Intergranular corrosion

(ii) Pilling Bedworth Rule

(iii)Water line corrosion

Win-2012

Sum-2013 6 M

3 M

c) What is Electrochemical corrosion? Describe the mechanism of

Electrochemical corrosion by evolution of hydrogen.

Win-2012

Sum-2013

4M

3 M

d) Give reasons:

(i) Corrosion occurs in steel pipe connected to copper plumbing.

(ii) The part of nail inside wood undergoes corrosion.

(iii)Nature of the metal oxide layer influences the rate of

corrosion.

Win-2012

6 M

e) What is Corrosion of metal? Describe the consequences of corrosion. Sum-2013 3M

f) Discuss the importance of Design and material selection in

controlling corrosion.

How corrosion can be prevented with proper material selection and

design?

Sum-2013

Win-2013

Sum-2014

Win-2014

Sum-2015

Win-2015

Win-2018

4 M

4 M

4 M

5M

4M

4M

4M

g) Explain Differential Aeration theory of Corrosion with suitable

examples.

Sum-2013 4M

h) Write short note on electroplating. Sum-2013 2M

i) Give reason:

(i) Silver and Copper metal don not undergo much corrosion like

iron in moist atmosphere.

(ii) Wire mesh corrodes faster at the joints.

(iii)Rusting of Iron is quicker in saline water than the ordinary

water.

Win-2013 6M

j)

Discuss the various factors which influence the corrosion process.

Sum-2013

Win-2013

Sum-2014

4 M

4M

5 M

k) Attempt any two:

(i). Atmospheric corrosion

(ii). Galvanization

(iii). Effect of environment on corrosion

Sum-2015 6M

l) Explain the following (any two)

1. Cathodic protection by impressed current.

Win-2015 6M

7

2. How rate of corrosion is depend upon nature of environment.

3. Pilling bedworth rule.

k) Discuss in brief mechanism of chemical corrosion with respect to

oxygen absorption

Sum-2016

Win-2016

4M

4M

l) Attempt following any two.

i) Pitting n corr

ii) Tinning

iii) Galvanic corrosion

Sum-2016 6M

Explain why? any three.

i) A copper equipment should not posses a small steel bolt.

ii) Rusting of iron is quicker in saline water than in ordinary water.

iii) Wire mesh corrodes faster at the joints.

iv) Iron corrodes faster than Aluminium even though it is placed

below Aluminium in electro chemical series.

Win-2016 6 M

m) Write notes on

i) Galvanic series.

ii) Pitting corrosion.

Sum-2017 4M

Give reason :

i) Wire mesh corrodes faster at the joints.

ii) Pitting corrosion is autocatalytic and self stimulating

Win-2017 3M

Discuss electrochemical theory of corrosion with respect to H2

liberation and O2 absorption.

Win-2017

Sum 2018

Sum 2019

4M

4M

5M

Write short notes on any two.

i) Pilling Bedworth rule.

ii) Factors influencing corrosion.

iii) Cathodic protection by sacrificial anode.

Sum 2018 6M

Justify with proper reason

1. Wter tank filled with water will undergo corrosion at

waterline of it

2. Wire mesh corrodes at crossing

3. Corrosion of metal is considered reverse of extraction of

metals

Win-2018 6M

Write short notes on any two:

i) Factors affecting rate of corrosion.

ii) Cathodic protection by Sacrificial anode.

iii) Corrosion of water filled tank occurs below waterline.

Sum 2019 5M

Q4. a) Write short notes on (any two)

(i) Hot dipping process

(ii) Anodic protection

(iii)Cathodic protection by impressed current.

Win-2013

Sum-2017

6M

4M

a) Explain the mechanism of electrochemical corrosion by H2 evolution

and absorption of O2 with neat diagrams.

Sum-2014

Win-2014

Win-2015

5 M

4 M

4 M

8

c) Give reasons

(i) Iron corrodes faster than Aluminum even though Fe lies

below Al in the electrochemical series.

(ii) Corrosion of water filled tank occurs below waterline.

(iii)Corrosion is reverse of extractive metallurgy.

Sum-2014 6 M

d) Write notes on:

(i) Atmospheric corrosion

(ii) Waterline corrosion

(iii)Electroplating

Win-2014 5 M

e) Attempt any two:

(i) Cathodic protection by impressed current

(ii) Compare EMF series and Galvanic series

(iii)Galvanizing and Tinning as protective coatings.

Win-2014 6 M

f) Give reasons (any three)

(i) Rusting of iron is quicker in saline water than ordinary water.

(ii) Corrosion is reverse of extractive metallurgy.

(iii)Corrosion of water filled tank occurs below waterline.

(iv) Corrosion occurs in steel pipe connected to copper plumbing

Sum-2015 6M

g) Explain why (any three)

1. Anodic area should be larger than cathodic area.

2. Copper equipment should not possess a steel bolt.

3. Pitting corrosion is auto catalytic and self stimulating.

4. A pure metal rod, half immersed vertically in water starts

corroding at the bottom.

Win-2015 6M

k)

Discuss importance of Design & Material Selection ?

How corrosion can be prevented with proper design & material

selection?

Sum-2016

Sum-2017

Win-2017

Sum2018

Sum2019

4M

3M

3M

4M

4M

l) Write note on any two.

i) Water line corrosion.

ii) Cathodic Protection by Impressed current.

iii) Electro Plating.

Sum-2016 6M

Discuss the various factors which influence the rate of corrosion, with

respect to nature of metal and environment

Win-2016 4M

Write a short note on any two.

i) Pilling-Bed worth rule.

ii) Galvanization.

iii) Electroplating.

Win-2016 6 M

Write short note on following. i) Pilling – Bedworth rule.

ii) Water line corrosion.

iii) Stress corrosion.

Sum-2017 6 M

Write short notes on : Win-2017 5 M

9

i) Water line corrosion.

ii) Intergranular corrosion

What is cathodic protection ? How it is done by using impressed

current and sacrificial

anode. Explain with suitable examples

Win-2017 5 M

Write brief note on any three.

i) Pitting Corrosion

ii) Differential Aeration Theory

iii) Intergranular corrosion

iv) Electroplating

Sum 2018 6M

Write brief note on any two.

i. Water line corrosion

ii. Cathodic protection by impressed current

iii. electroplating

Win-2018 6M

State and explain pilling bedworth rule with suitable example. Win-2018 4M

Write short notes on any three:

i) Pilling Bedworth Rule ii) Stress Corrosion

iii) Protective Coating iv) Pitting Corrosion

Sum 2019 6M

Unit III - Cement

Winter 12

Q.5. a)

What are microscopic constituents present in cement? How do they

contribute towards properties of cement?

Win-2012

Sum-2013

Win-2014

Win-2017

4 M

4 M

4M

4M

b)

Explain the setting and Hardening of Portland Cement.

Win-2012

Sum-2013

Win-2013

Win-2014

Sum-2015

Win-2018

5 M

5 M

5 M

5 M

5 M

4M

c) What are cement additives? Discuss any two of them.

Win-2012

Sum-2017

3 M

4 M

d) Low heat cement is used for construction of dams. Explain. Win-2012 2 M

e) Write short note on (any Two):

i) Low heat cement

ii) Rapid hardening cement

iii) Accelerators.

Sum-2013 5 M

f) Write properties and application of Fly ash Sum-2013 3M

. g) For what purpose are the following types of cement used and why?

(i) Rapid hardening cement

(ii) Water proof cement

Win-2013 4 M

10

(iii)High Alumina cement

(iv) Low Heat cement

h) How is ordinary Portland cement manufactured by wet process? Give

the various reactions taking place in the Rotary Klin. Also state the

significance of rate of cooling of clinker.

Sum-2013

Win-2013

Sum-2014

Win-2014

3 M

6 M

6 M

6 M

i)

Explain the wet process of cement manufacturing, with a neat and

well labeled diagram

Sum-2015

Win-2016

Sum-2017

Sum 2018

Win-2018

Sum 2019

6 M

6 M

6 M

6 M

6 M

6 M

j) For what purpose following type of cement is used and why?

(i) White cement

(ii) Low heat cement

(iii)High alumina cement

(iv) Rapid hardening cement

(v) Soundness of cement

(vi) Ready mix concrete

Sum-2015

Win-2015

4 M

4M

k) How does ordinary Portland cement set in and harden on mixing with

water? Justify the answer with chemical equations.

Win-2015 4M

l) Write short notes on the following?

1. Cement moduli

2. Cement additives

3. Fly ash as a cementing material

Win-2015 6M

m) How Is Portland cement manufactured by wet process ? Give various

reactions taking place in rotary kiln ? Also discuss significance of

rate of cooling of clinkers ?

Sum-2016 6M

n) Discuss following with respect to advantages & limitation.

i) Ready mix Concrete

ii) Fly Ash as Cementing Material

Sum-2016 4M

o) Write note on any two.

i) Rapid hardening cement.

ii) High Alumina cement.

iii) Ready mix concrete

Win-2016 4M

p) Write informative notes on :

i) Cement additives.

ii) Fly ash as cementing material.

iii) Soundness of cement.

Win-2017 6M

q) Explain the following any two.

i) Heat of hydration & soundness of cement.

ii) Ready mix concrete.

Sum-2018 4M

11

iii) Rapid hardening cement.

r) What is the significance of following additives in cement

1. accelerators

2. water repelling agents

Win-2018 4M

s) What are cement additives? Explain any two. Sum-2019 2M

t) Write properties and application of Fly Ash. Sum-2019 2M

Q.6. a)

What are the important process parameters for manufacturing of good

cement clinkers?

Win-2013

Sum-2014

Sum-2015

Sum-2018

3 M

3 M

3 M

3M

b) Write informative notes on cement additives. Win-2013 3 M

c) Write a brief note on Ready Mix Concrete, with advantages and

limitations.

Sum-2014 3 M

d) Properties of cement depend upon its microscopic constituents.

Explain.

Sum-2014 4 M

e) Give reasons

(i) Dolomitic limestone is unsuitable for cement manufacture.

(ii) Low heat cement is used for construction of dams.

Sum-2014 4 M

f) Explain the following (any two)

(i) Heat of Hydration and soundness of cement.

(ii) Cement additives

(iii)Ready mix concrete

Win-2014 5 M

g) What do you mean by soundness of cement? Sum-2015 2 M

h) Draw a labeled diagram of rotary kiln. Describe the process of

manufacture of Portland cement by wet process. State the various

thermochemical changes occur during the process.

Win-2015 6 M

i)

What is setting & gardening of Portland cement ? Discuss with the

help of reactions involved ?

Sum-2016

Win-2016

Sum-2017

Win-2017

Sum-2019

6M

4M

4M

5M

4M

j) Write informative Note on:

i) Heat of Hydration

ii) Cement Additives

Sum-2016 4M

k) Discuss the following any two.

i) Cement additives.

ii) Microscopic constituent of cement.

iii) Process parameter for manufacturing good cement.

Win-2016 6M

l) b) Write short note on

i) Microscopic constituents of cement.

ii) Fly ash as a cementing material.

Sum-2017 6M

Differentiate between Dry and Wet process of cement manufacturing. Win-2017 3M

12

m) Percentage of lime has to be maintained carefully during cement

manufacturing. Why.

Win-2017 2M

n) Explain the properties of microscopic constituents of cement.

Sum-2018 4 M

o) Write properties and application of flu ash as cementing material Sum-2018 3M

p) Explain any one

i. Heat of hydration

ii. Soundness of cement

Win-2018 4M

q) Write short notes on any two.

i) Low heat cement

ii) Rapid Hardening Cement

iii) White Cement

Sum-2019 4 M

r) What is soundness of cement? How it is related with excess CaO in

raw materials of cement.

Sum-2019 4 M

Unit IV- Green Chemistry& Battery Technology

Winter 12

Q.7. a)

What is Green Chemistry? Mention its principles.

Explain any two principles

Give the significance of green chemistry. State the basic principles of

green chemistry.

Win-2012

Sum-2013

Win-2013

Win-2014

Win-2015

Win-2016

Sum-2017

Win-2017

Sum-2018

Win-2018

Sum-2019

3M

4M

4 M

4 M

3M

4M

4M

3M

4M

4M

4M

b)

Write short notes on (any Two):

i) Supercritical Carbon dioxide

ii) Carbon Credits

iii) Reserve batteries.

iv) Biocatalyst

Win-2012

Sum-2013

Win-2013

Sum-2014

Win-2014

Sum-2015

Win-2018

5 M

4M

4M

4M

4M

4 M

6M

c)

What are Fuel Cells? Explain working of H2-O2 alkaline fuel Cell

with its advantages and limitations.

Win-2012

Win-2014

Sum-2016

Win-2018

5 M

4 M

4 M

6M

d)

Write Short note on Biocatalysis.

Win-2012

Win-2013

Sum-2014

3M

4 M

4 M

13

e) Discuss super critical CO2 as a green solvent. Win-2015 3M

f) Define energy density and power density. Win-2015 3M

g) Explain concept of carbon credit. Sum-2016 2M

h) Discuss applications of Lithium ion battery. Sum-2016 2M

i) Explain the construction and working of Ni-Cd battery.

Win-2016

Win-2017

4M

4M

Write short note on any two.

i) Applications of Lithium Battery.

ii) Primary Batteries.

iii) Biocatalysis.

Sum-2018 8M

Explain following

i. Power and energy density

ii. Primary battery

Win-2018 4M

Discuss applications of lithium ion battery.

Win-2018 4M

Write short notes on any two.

i) Carbon Credits

ii) Biocatalysis

iii) Lithium battery

Sum-2019 4M

Q.8 a) What is Green Chemistry? Discuss its significance.

Sum-2013

Sum-2014

Sum-2015

3M

3M

3 M

b) What is secondary battery? State criteria for a good secondary

battery.

Sum-2013 3M

c) Discuss the application of fuel cell. Sum-2013 2M

d)

Discuss supercritical fluid CO2 with the help of its phase diagram.

Win-2013

Win-2014

Win-2017

4 M

4M

4M

e)

Explain the working of Ni-Cd batteries with its advantages, limitation

and application.

Win-2013

Sum-2014

Sum-2015

Win-2015

4 M

4M

4 M

4M

f) Write short notes on:

(i) Biocatalysts

(ii) Lithium ion batteries

(iii)Carbon credit

(iv) Primary battery

Sum-2014

Win-2015

5 M

4 M

g) Define the terms- Energy Density and Power Density of battery. Win-2014 2 M

h) What is supercritical fluid? State properties and advantages of SFC

CO2.

Sum-2015

Sum-2016

Win-2016

3 M

4M

4M

14

Sum-2017

Sum-2019

4M

4M

i) Discuss the applications of fuel cell. Sum-2015 2 M

j) Explain the following any two.

i) Reserve Battery.

ii) Power density and Energy Density.

iii) Green chemistry with its significance.

Sum-2016 4M

k) Write short note on the following any two.

i) Bio catalysis.

ii) Energy density & power density.

iii) Carbon Credits.

Win-2016

Sum-2017

4M

4M

l) Explain construction and working of H2 O2 alkaline fuel cell.

Sum-2017

Sum-2018

4M

4M

m) Write short note on :

i) Biocatalysis.

ii) Carbon credit

Win-2017

4M

n) Write short notes on any two.

i) Energy density and power density.

ii) Advantages and applications of CO2 as super critical fluid.

iii) Significance of green chemistry.

Sum-2018 4M

o) Write short notes on any two :

i) Ni-Cd batteries.

ii) Fuel cell.

iii) Energy density and power density of battery

Sum-2019 4M

1

SEM-II-QUESTION BANK SUBJECT: MATERIALS CHEMISTRY

Unit I - Energy I Year Marks

Q.1. a) During the determination of calorific value of a gaseous fuel by Bomb

calorimeter, the following results were recorded: (i) Weight of Fuel

Burnt = 1.90 gm.

(ii) Water Equivalent of Calorimeter = 500 gm. (iii) Weight of water

taken in calorimeter = 2300 gm. (iv) Initial Temperature of water

=25.05° C. (v) Final Temperature of water = 29.23°C. (vi) Acid

Correction=15 cal. (vii) Fuse wire Correction = 7cal. (Viii) Tread

correction = 5cal. (ix) Cooling Correction=0.26°C . If the fuel contains

7.5% Hydrogen, Calculate the gross and net calorific value of coal

sample provided that the latent of steam condensed is 587 cal/gm.

Sum-2013 4 M

b) Write Short Note on (any two):

i) Significance of ultimate analysis of coal

ii) Biodiesel

iii) Non-conventional sources of energy.

Sum-2013 6 M

c) Calculate gross and net calorific value of a gaseous fuel at NTP from the

following data obtained during determination of calorific value using

Boy’s calorimeter:

(i) Volume of gaseous fuel burnt at STP=0.089m3

(ii) Wt. of water used for cooling the combustion products=25 kg

(iii)Wt. of steam condensed = 0.030 kg

(iv) Temperature of inlet water = 20.4°C

(v) Temperature of outlet water = 33.4°C

(vi) Latent heat of waters condensed = 587 kcal/kg

Win-2014 4M

d) Calculate G.C.V. and N.C.V. of gaseous fuel at S.T.P. from the

following data obtained during Boy,s calorimeter experiment:

(i) Volume of gaseous fuel burnt at STP=0.085m3

(ii) Wt. of water used for cooling the combustion products=29.6 kg

(iii)Wt. of steam condensed = 0.028 kg

(iv) Temperature of inlet water = 20.6°C

(v) Temperature of outlet water = 33.4°C

Latent heat of waters condensed = 540kcal/kg is to be assumed.

Sum-2014 4M

e)

Discuss the significance of Ultimate Analysis of coal.

Sum-2014

Win-2016

Sum-2019

3M

3M

3M

f) Discuss the various corrections applied during determination of calorific

value of solid fuel by Bomb calorimeter.

Sum-2014 3M

g) Calculate the gross and net calorific value of coal having the following

composition: C=80%, H=8%, S=1%, N=2% and ash=6% using Dulongs

formula. Given: Latent heat of steam=587 cal/g

Sum-2015 4M

h) Discuss the following non-conventional energy sources w.r.t

applications and advantages.

Sum-2015 4 M

2

i) Solar energy

j) Wind energy

k) How does % of carbon and ash in coal affect the quality of coal? Sum-2015 4 M

l) Using Dulong’s Formula Calculate the GCV and NCV of coal sample

having ultimate analysis results: C = 78%, H = 5%, N = 2%, S = 2%

and ash = 11%. Latent Heat of water = 587 cal/g.

Win-2015 4 M

m) Discuss composition, properties and uses of LPG Win-2015 4 M

n) Write the difference between Solid and Liquid propellants. Win-2015 2M

o) During the determination of calorific value of a gaseous fuel by Boy's

calorimeter, the

following results were recorded:

i) Volume of gaseous fuel burnt at NTP = 0.093 m3.

ii) Weight of water used for cooling the combustion products = 31.0kg.

iii) wt of steam condensed = 0.030 kg.

iv) Temperature of inlet water = 26.2ºc

v) Temperature of Outlet water = 36.3ºc.

Determine G.C.V. and N.C.V. of gaseous fuel per cubic meter at NTP.

Sum-2016 4 M

p) Explain the determination of calorific value of solid and non volatile

liquid fuel by using Bomb calorimeter.

Sum-2016 6 M

q) Calculate gross and net calorific value of a gaseous fuel at STP from the

following data obtained during Boy’s calorimeter:

Volume of gaseous fuel burnt at STP=0.093m3

Wt. of water used for cooling the combustion products=23.5 kg

Wt. of steam condensed = 0.39 kg

Temperature of inlet water = 24.1°C

Temperature of outlet water = 33.8°C

Latent heat of waters condensed = 540 kcal/kg

Win-2016 4M

r)

Dessribe principle of rocket propulsion.

Win-2016 3M

s) During the determination of calorific value of a coal sample by Bomb

calorimeter

following results were recorded :

Weight of fuel burnt = 1.85 gms

Water equivalent of calorimeter = 490 gms

Weight of water taken in calorimeter = 2200 gms

Initial temp. of water = 25.8ºC

Final temp. of water = 30.2ºC

Acid correction = 14 cal.

Fuse wire correction = 6 cal.

Thread correction = 5 cal.

Cooling correction = 0.26ºC.

If the fuel contains 7.5% of hydrogen, calculate the Gross & Net

calorific value of the coal

sample provided that the latent heat of steam condensed is 587 cal/gms.

Sum-2017 4 M

Write note on any two.

i) Rocket Propellants.

ii) LPG

Sum-2017 6 M

3

iii) Significance of ultimate analysis of coal.

How bio - diesel is obtained from vegetable oils? Write down the

advantages and disadvantages of biodiesel.

Win-2017 4M

Describe the principle of rocket propulsion and classification of rocket

propellants.

Win-2017 4M

Give the significance of proximate analysis. (solid fuels).

Win-2017 2M

The following data was obtained in a Bomb calorimeter experiment:-

Weight of coal burnt = 1.90g

Water equivalent of colorimeter = 500g

Weight of water taken in calorimeter = 2600g

Initial temperature of water = 25.05ºC

Final temperature of water = 29.80ºC

Acid correction = 8 Cal

Fuse wire correction = 5 Cal

Cooling correction = 0.25ºC

If the coal contains 6.7% Hydrogen, calculate GCV and NCV of coal

provided that the

latent heat of steam condensed is 584 Cal/g.

Sum-2018 4M

Write short note on any two.

i) Classification of Rocket Propellants.

ii) Biodiesel.

iii) Significance of ultimate analysis of coal.

Sum-2018 6M

In an experiment of Bomb calorimeter apparatus the following data were

obtained

i) Weight of coal burnt = 0.95g

ii) Water equivalent of calorimeter = 700g

iii) Weight of water = 2000g.

iv) Rise in temperature = 2.48ºC

v) Cooling correction = 0.02ºC

vi) Fuse wire correction = 10 calories

vii) Acid correction = 60 calories

Calculate G.C.V. and N.C.V. of the coal in calories per gram.

[Latent heat of condensation of steam = 560 cal/g & % of Hydrogen in

fuel = 5%].

Win-2018 4M

Write descriptive note on Liquified petroleum gas.

Win-2018

Sum-2019

3M

3M

Give the applications, advantages & disadvantages of non-conventional

energy sources?

Win-2018 3M

A sample of coal containing 5.5% of hydrogen, when tested in Bomb

calorimeter

following data were recorded.

Weight of coal taken 1.5 gm

Weight of water taken in calorimeter 2250 gm

Water equivalent of calorimeter 550 gm

Rise in temperature of water 2.59ºC

Cooling correction 0.02ºC

Sum-2019 4M

4

Fuse wire correction 15 Cals

Acid correction 25 Cals

Calculate Gross and Net Calorific values of the coal presuming that

latent heat of steam

is 580 cal/gm

OR

Q 2. (i). What is the significance of proximate analysis of coal?

Sum-2013

Win-2014

3 M

(ii). What are Rocket Propellants? Explain the classification of propellants? Sum-2013 3 M

(iii). Explain how calorific value of gaseous fuel is determined by using

Boy’s calorimeter.

Sum-2013 4M

(iv). Write short notes on (Any Two)

(i) Biodesel

(ii) C.N.G.

(iii)Solar energy

(iv) L.P.G.

Win-2014

Sum-2014

Sum-2018

6M

6M

6M

(v). Describe the principle of rocket propulsion. Win-2014 2M

(vi). Explain how calorific value of solid and nonvolatile fuel is determined

by using Boy’s calorimeter.

Win-2014

Sum-2017

5M

4M

(vii). What are rocket propellents? How the chemical rocket propellents are

classified?

Sum-2014

4M

(viii). Explain the determination of calorific value of gaseous fuel by using

Boy;s gas calorimeter.

Sum-2015

Sum-2018

4M

4M

(ix). What are rocket propellents? Explain the mechanism of rocket

propulsion.

Sum-2015 3M

(x). Write a informative note on biodiesel. Sum-2015 3M

(xi). How biodiesel is obtained by trans esterification process? Discuss its

advantages and disadvantages

Win-2015 4 M

(xii). How calorific value of gaseous fuel is detrermined by Boy’s calorimeter

Win-2015

4 M

(xiii). Why is net calorific value less than gross calorific value? Win-2015 2M

(xiv). What are rocket propellants? Give the characteristics of propellants. Sum-2016 3 M

(xv). What is significance of proximate analysis of coal? Sum-2016 3 M

(xvi). Write short notes on: any two.

i) C.N.G.

ii) L.P.G.

iii) Biodiesel.

Sum-2016 4 M

(xvii). Explain the determination of calorific value of gaseous fuel by using

Bomb calorimeter.

Win-2016 4M

(xviii). Write informative note on any two.

1. Biodiesel.

2. Solar Energy

3. Classification of Rocket propellents.

Win-2016 4M

(xix). How Biodiesel is synthesized by transesterification process? Discuss its Sum-2017 3 M

5

properties & applications.

Win-2018 4M

(xx). Write an informative note on Non - conventional sources of energy. Sum-2017 3 M

(xxi). Calculate the gross and net calorific value of a gaseous fuel at STP from

the following

data obtained during the determination of calorific value using Boy's

calorimeter.

i) Volume of gaseous fuel burnt at STP 0.090M3 .

ii) Weight of water used for cooling of combustion product = 30.5 kg.

iii) Weight of steam condensed = 0.025 kg.

iv) Temperature of incoming water = 21 ºC.

v) Temperature of outgoing water = 33 ºC

Assume heat liberated in condensation of water vapours as 580 kcal/kg.

Win-2017 4M

(xxii). Give the composition, properties and uses of CNG Win-2017 3M

(xxiii). Write notes on following any two.

i) Rocket propellant.

ii) Ultimate analysis of coal.

iii) CNG.

Win-2018 6M

(xxiv). Describe construction and working of Bomb calorimeter. Sum-2019 4M

(xxv). Write informative notes on any two.

i) CNG

ii) Biodiesel.

iii) Geothermal Energy.

Sum-2019 4M

Unit II- Energy II

Q.3. a) A coal sample has following percentage composition by mass:

C = 74%, H = 6.8%, O = 13.0%, N2 = 2.1 %, S = 1 and rest is ash.

Calculate:

(i) Minimum volume of air in m3 at NTP required for complete

combustion of 100 kg of the fuel.

(ii) Volumetric composition of dry products if 40 % excess air is

supplied.

Sum-2013 4M +

4M

b) Explain Fischer Tropsch Process for manufacturing of synthetic gasoline

with a well labeled diagram.

Sum-2013

Win-2014

Win-2017

4 M

c) A liquid hydrocarbon fuel containing C=80% and H=20% is fired in a

Furnace. Calculate:

(i) Weight of air required per kg of fuel.

(ii) The volumetric composition of dry products of combustion, if

20% excess air is used.

Sum-2014 8M

d) Give the various fractions obtained boiling point wise on fractional

distillation of crude oil. Also mention their uses.

Sum-2014 8M

e) A boiler is fired with a coal having following composition

C=72%, H=6.0%, O=13.2%, N=2.8%, S=1.2%, and rest is ash,

Calculate:

Win-2014 4+4

6

(i) Theoretical Air:Fuel ratio used for combustion

(ii) Volumetric composition of dry products of combustion, if 30%

excess air is used.

f) A producer gas has the following % composition by volume: CH4=3.5%,

CO=25%, H2=10%, CO2=10.8% and N2=50.7% calculate:

(i). The theoretical quantity of air required to burn 1m3 of above gas at

N.T.P.

(ii). The volume composition of dry-products of combustion formed, if

25% excess air is used for combustion.

Sum-2015 8 M

g) Explain knocking in diesel engine. How is it related to chemical

structure of fuel?

Sum-2015 4 M

h) What is cracking? What are its objectives? Discuss moving bed catalytic

cracking

Win-2015 6M

i) Discuss knocking in petrol run IC engine? How is it related to chemical

structure of hydrocarbons and compression ratio?

Win-2015 6M

j) A liquid hydrocarbon fuel containing C=80% and H=20% is fired in a

furnace. Calculate:

i) Weight of air required per kg of fuel.

ii) The volumetric composition of dry products of combustion, if 30%

excess air is used.

Sum-2016 8 M

k)

Explain Fischer Tropsch Process for manufacturing of synthetic gasoline

with a well labelled diagram.

Win-2015

Sum-2016

Win-2016

Sum-2017

Sum-2018

Sum-2019

4 M

4 M

4 M

4 M

4 M

4 M

l) A coal sample has following composition:

C = 62.4%, H = 4.1%, O = 6.9%, N2 = 1.2 %, S = 0.8, Moisture=15.1%

and ash 9.5 % Calculate:

(i) Minimum air required in m3 at NTP for 1 kg of the fuel.

(ii) q0 composition of dry products by volume if 45 % excess air is

supplied.

Win-2016 4M

m) A Gas has the following composition by volume : H2 = 22% CH4 = 4%,

CO = 20%CO2 = 6%, O2 = 3% and rest is N2 . find out,

a) Volume and weight of Air required for complete combustion of

100m3 gas.

b) If 15% excess air is supplied, calculate volumetric composition of dry

products of combustion.

Sum-2017 8 M

n) A producer gas has the following composition by volume

CH4 3.5%, CO 25%, H2 8%

CO2 12% and rest is N2 .

Calculate :

i) Theoretical quantity of air in M3 required per cubic meter of the gas.

ii) If 20% excess air is used, find the % composition of dry flue gas.

Win-2017 4M

7

o) Explain octane and cetane number and their relationship with the

chemical structure of hydro carbon present in the fuel.

Win-2017 4M

p) The coal containing C = 76%, H = 5%, O = 3.5%, N2 =3%, S = 1.5%

and remaining ash is fired in a furnace. Calculate:

i) Theoretical quantity of air required per kg of coal burnt.

ii) If 45% excess air is used calculate volumetric composition of dry

products of combustion.

Sum-2018

8M

q) A gas has following composition by volume :-

H2 = 22%, CH4 = 4%, CO = 20%, CO2 = 06%, O2 = 03% and N2 =

45%.

Calculate:

a) Volume and weight of theoretical air required for combustion of 1m3

of gas. 4

b) Volumetric composition of dry products of combustion if 15% excess

air is supplied.

Win-2018 8M

r) How gasoline is prepared from "water-gas"? Explain the role of catalyst

in this process?

Win-2018 4M

s) A coal sample an analysis give following composition :

C - 75%, H - 6%, O - 1.6%, S - 1.6%, N - 1%, moisture - 1.8% and rest

is ash.Calculate – i) Minimum volume of air at NTP required for the combustion of 200 kg

of this coal.

ii) Volumetric composition of dry flue gas when 20% excess air is

supplied for combustion.

Sum-2019

8M

OR

Q.4. a)

What is cracking? Explain the process of fluid bed catalytic cracking of

heavy oil.

Sum-2013

Sum-2017

Win-2017

Sum-2019

6M

6M

6M

4M

b)

Explain the process of fractional distillation of crude oil with a well

labeled diagram. What are the different fractions of petroleum and

their uses?

Enlist various fractions obtained during fractional distillation with their

boiling range and uses.

Sum-2013

Sum-2018

Sum-2015

Win-2017

Win-2018

6M

5M

4M

4M

4M

c) What is Catalytic cracking? Mention important advantages of catalytic

cracking. Explain fluid bed catalytic cracking with a neat sketch.

Sum-2014

Win-2018

6M

6M

d) Write short notes on:

(i) Knocking in diesel engine

(ii) Antiknocking agents in petrol.

Sum-2014 6M

e) Discuss how the knocking properties of gasoline are related to the

chemical constitution of the fuel and compression ratio.

Win-2014 6M

f) Explain fractional distillation of crude petroleum oil. Win-2014 5M

8

g)

Write short note on Cetane Number.

Win-2014

Win-2016

Win-2018

3M

2M

2M

h) What is catalytic cracking? Explain moving bed catalytic cracking with

neat sketch.

Sum-2015

Win-2016

Sum-2018

5 M

5 M

4 M

i) Define: octane number and cetane number. How octane no. and cetane

no. can be improved?

Sum-2015 3 M

j) A gaseous fuel has the following % composition by volume : CH4

= 45%, C2H6 = 25%, C3H8= 16%, CO= 8% and N2 = 6%. if 25% excess air is

supplied , calculate:

1) Minimum volume of air in cubic meter required per cubic meter of fuel.

% composition of dry flue gas (by volume) with respect to supplied air

Win-2015 6M

l) Explain the process of fractional distillation of crude oil with a well

labeled diagram. What are the different fractions of petroleum and their

uses?

Sum-2016 6 M

m

)

Explain knocking in petrol Engine. How is it related to chemical

structure of fuel.

Define octane number. State how knocking in petrol is related with its

chemical structure

Sum-2016

Sum-2018

4 M

3 M

n Differentiate between octane number and Cetane number. Sum-2016 2 M

What is compression ratio? How does it affect the power output and

efficiency of internal combustion engine.

Win-2016 3M

Write short note on

(i) Cetane number

(ii) Antiknocking agents in petrol

(iii)Advantages of catalytic cracking over thermal cracking.

Win-2016 4M

Write descriptive note on any two.

i) Fractional Distillation.

ii) Octane and Cetane No.

iii) Knocking and chemical structure of hydrocarbon.

Sum-2017 6 M

Write short notes on.

i) Knocking in petrol engine.

ii) Biodegradable lubricants.

Sum-2019 4 M

Explain octane number and its relationship with the chemical structure

of hydrocarbons present in the fuel.

Sum-2019 4 M

Unit III - Lubrication

Q.5. a) What are semi-solid lubricants? State the conditions under which they

are used.

Sum-2013

Win-2016

Sum-2018

5M

3M

3M

b) Write short notes on (any TWO)

(i) Boundary lubrication

(ii) Silicones

(iii)Cloud and pour point

Sum-2013 3M

c) Differentiate between Thick film and Thin film mechanisms of Sum-2014 3M

9

lubrication. Win-2017

Sum-2019

3M

2M

d) Under what operating conditions are solid lubricants preferred? Explain

role of graphite as a solid lubricant.

Sum-2014 5M

e) ‘Close cup apparatus’ gives more reliable and accurate values of flash

and fire point than obtained by ‘open cup apparatus’. Justify.

Sum-2014 3M

f) What are Greases? Under what condition they are used as lubricant.

Win-2014

Sum-2015

3M

3 M

g) Write short notes on (any TWO)

(i) Biodegradable lubricants

(ii) Silicones as synthetic lubricants

(iii)Viscosity and Viscosity Index.

(iv)

Win-2014

5M

h)

Discuss boundary film lubrication mechanism.

Sum-2015

Win-2016

Sum-2017

3 M

3 M

3 M

Give the significance of following properties of lubricating oils:

(i). Cloud and pour point

(ii). Acid value

(iii). Viscosity index

(iv). Flash and fire point

(v). Drop point test of greases.

Sum-2015

Win-2016

Sum-2018

3 M

2M

3M

i) An oil sample under test has saybolt universal viscosity same as that of

low standard Gulf oil and high standard pennsylvian oil at 210 F. their

viscosities at 100 F are 61, 758 and 420 SUS respectively. Calculate

V.I of given oil.

Sum-2015 2 M

j) Compare thin film lubrication with thick film lubrication Win-2015 4M

k) Discuss the conditions under which solid lubricant are preffered?

Explain the structure of molybdenum disulphide

Win-2015 4M

l) Under what operating conditions solid lubricants are preferred? Explain

Graphite as a solid lubricant with diagram.

Sum-2016

Win-2017

Sum-2018

5 M

3M

3M

m) Give the significance of following properties of lubricating oils:

i) Cloud and pour point

ii) Aniline point

iii) Acid value.

Sum-2016 3 M

A lubricating oil has same viscosity as that of standard naphthenic and

paraffinic base oil at 210 oF. Their viscosities at 100 oF are 350 sec., 480

sec. and 230 sec. respectively. Find the viscosity index of the oil.

Win-2016 3M

A transformer oil has the same viscosity as that of zero VI oil (Gulf oil)

and 100 VI oil (Pennsylvanian oil) at 210ºF. Their viscosities at 100ºF

are 320, 430 and 260 SUS resp.Find the viscosity index of the

transformer oil.

Sum-2017 2 M

Why Greases are called as a thixotropic gel? State the condition under

which semisolid lubricant are used.

Sum-2017 3 M

A transformer oil has S.U.V. of 78 seconds at 210 ºF and 490 seconds at

100 ºF. Low viscosity gulf oil has S.U.V. of 78 seconds at 210 ºF and

Win-2017 2M

10

710 seconds at 100 ºF. High viscosity Pennsylvanian oil has S.U.V. of

78 seconds at 210 ºF and 430 seconds at 100 ºF. Calculate the viscosity

index of given oil.

A Lubricating oil has same viscosity as that of high viscosity standard

and low viscosity standard oil at 210ºF. Their viscosities at 100ºF are

320 sec, 280 sec and 420 sec respectively. Find viscosity Index of the

oil.

Sum-2018 2 M

What is Lubrication? Name different mechanism of lubrication. Explain

Thick film

lubrication.

Win-2018 4M

Write a short note on Synthetic lubricants

Win-2018

Sum-2019

4M

2M

Define viscosity and viscosity index? How these properties of

lubricating oil can be improved?

Sum-2019 4M

OR

Q.6. a) Explain extreme pressure lubrication. Sum-2013 3M

a) A lubricating oil has same viscosity as that of standard naphthenic and

paraffinic base oil at 210 oF. Their viscosities at 100 oF are 350 sec., 460

sec. and 280 sec. respectively. Find the viscosity index of the oil.

Sum-2013 2M

b) Write the criteria for selection of lubricants for

(i) IC engine

(ii) Transformer

(iii)Steam turbine

Sum-2013 3M

c) Give the significance of following properties of lubricating oils:

(i) Viscosity index

(ii) Aniline point

(iii)Cloud and pour point.

Sum-2014 2M

d) Write short notes on (any Two)

(i) Lubricating emulsions

(ii) Drop point test

(iii)Biodegradable lubricants.

Sum-2014 3M

e) Explain the significance of flash and fire points in selecting the

lubricating oil.

Win-2014 2M

f) A transformer oil has S.U.V. of 90 second at 210 oF and 450 second at

100 oF. Low viscosity Gulf oil has SUV of 90 second at 210 oF and 700

second at 100 oF. High viscosity Pennsylvanian oil has SUV of 90

second at 210 oF and 420second at 100 oF. Calculate viscosity index of

given oil.

Win-2014 2M

g) What are the requisites of the lubricants to be used in the following

machinery:

(i) Refrigeration

(ii) Steam turbines.

(iii)Gears

(iv) IC Engine

Win-2014 4M

h) Write notes on (any two) Sum-2015 5 M

11

(i). Synthetic lubricants

(ii). Lubricating emulsions

(iii). Graphite as a lubricant

Win-2016

2 M

j) discuss the working conditions, properties of lubricating oils used for IC

engines and transformers

Win-2015 4M

k) Define drop point test and penetration test. Write the significance of

above test

Win-2015 4M

l) Explain thick film lubrication Sum-2016 3M

m) Write criteria for selection of lubricants for.

i) Transformer.

ii) IC Engine.

iii) Steam turbine

iv) Refrigeration.

Sum-2016

Win-2016

Sum-2017

3M

3M

n) A lubricating oil has the same viscosity as standard napthanic and

paraffinic type oils at 210ºF. Their viscosities at 100ºF are 325 S.U.S.,

430 S.U.S. and 260 S.U.S. respectively. Find the viscosity Index of the

oil.

Sum-2016 2M

Explain the mechanism of Boundary Lubrication. Win-2016 3 M

o) Define and state the significance of any two.

i) Drop point and consistency test of grease.

ii) Cloud point and pour point.

iii) Flash point and Fire point.

Sum-2017

Win-2018

5 M

2M

Discuss Drop - Print Test of Greases. Win-2017 3 M

Write a note on :

i) Lubricating emulsions.

ii) Extreme Pressure Lubrication.

Win-2017 5 M

Discuss Boundary Lubrication on mechanism. Sum-2018 3 M

What are the requisites of lubricants to be used in following any two.

i) Transformer.

ii) I/C engines

iii) Gear

Sum-2018 2 M

Explain the following properties of lubricants with their significance any

two.

i) Viscosity and Viscosity index.

ii) Flash point and Fire point.

iii) Cloud point and pour point.

Win-2018 4 M

Under what operational conditions solid lubricants are used. Explain the

structure of

graphite.

Win-2018 4 M

Discuss the properties of lubricating oil used for I. C. engines and

transformers.

Sum-2019 4 M

Under what conditions are semisolid lubricants used? Sum-2019 2 M

Write short note on any two.

i) Acid value.

ii) Flash point

Sum-2019 2 M

12

iii) Aniline point.

Unit IV – ADVANCED MATERIALS

Q.7 a) What are the properties and applications of Liquid Crystal Polymers?

Discuss different phases of LCP.

Sum-2013

Sum-2017

4M

4M

b) Define carbon nanotubes. List any two applications of carbon nanotubes. Sum-2013 3M

c) Discuss application of nanomaterials in environmental fields.

Sum-2013 3M

d) What are composite materials? How are they classified? Give industrial

applications of composite materials

What are composite material? Explain the engg. applications of

composite material with suitable examples.

Sum-2014

Win-2014

Sum-2017

Sum-2019

3M

3 M

3 M

4M

e) What are nanomaterials? Enlist the applications on Nanomaterials in the

fields of medicine and environment.

Sum-2014

Sum-2015

3M

4 M

f)

What is Carbon Nanotube? Name its types.

Sum-2014

Win-2014

Sum-2015

Win-2016

4M

3M

2 M

3 M

g) What are conducting polymers? Give the properties and applications of

polyaniline.

Win-2014 4M

h) Explain applications of Nano Materials in medicine.

Win-2014 2M

4M

i) What are composite materials? Give the general classification of

composite materials. Enlist any two uses of each type.

Sum-2015

Win-2016

Win-2017

4 M

3 M

4M

j) Why the demand of biodegradable polymers is more as compared to

ordinary polymers? Discuss the synthesis and applications of

polycaprolactone.

Win-2015 4M

k) ) what is the use of mesogen in the structure of liquid crystal polymers?

Discuss the applications of LCP.

Win-2015 3M

l) write short note on carbon nanotubes and their uses in the field of

electronics.

Win-2015 3M

m) What are nanomaterials? Enlist the applications of nanomaterials in the

field of Electronics.

Sum-2016 3M

n) b) What are the properties and applications of liquid crystal polymers?

Discuss different phases of LCP.

Sum-2016

Win-2016

4M

3M

o) c) What are biodegradable polymers? Give synthesis and applications of

polylactic acid.

Sum-2016

Sum-2018

3M

4M

p) Give the synthesis & applications of polylactic acid as a biodegradable

polymer.

Win-2016 3 M

q) What are carbon nanotubes? Discuss the application of Nano-technology

in the fields of medicine and Environment.

Sum-2017

4M

r) What are conducting polymers? Give properties and applications of Sum-2017 3M

13

polyaniline

s) Discuss the synthesis and applications of

i) Polycaprolactone

ii) Poly lactic acid.

Win-2017 4 M

t) Discuss carbon nano tubes and their types. Win-2017 4 M

u) Write short notes on any two.

i) Applications of nanomaterials in environment.

ii) Conducting polymers

iii) Carbon nanotubes

Sum-2018

6 M

v) What are conducting polymer? State the types of conducting polymer?

Give an account of polyacetylene as conducting polymer.

Win-2018 5 M

w) Define the term "composite-material". How are they classified? State the

important application of composite material.

Win-2018 5 M

x) Explain properties and applications of polycaprolactone (PLC). Sum-2019 4 M

y) Write applications of polylactic acid. Sum-2019 2 M

OR

Q.8 a) What are biodegradable polymers? Give synthesis and application of

poly lactic acid.

Sum-2013 3M

b) What are composite materials? Give industrial applications of fibre

reinforced composite materials.

Sum-2013 3M

c) What are conducting polymers? Give the properties and applications of

polyaniline.

Sum-2013

Sum-2014

4M

3M

d) Give an account of synthesis, properties and applications of Polypyrrole

conducting polymer.

Sum-2015 4M

e)

Give an account of synthesis, properties and applications of polylactic

acid, a biodegradable polymer.

Sum-2014

Win-2014

Sum-2017

4M

4M

f) What are Liquid Crystal Polymers? Give different phases of liquid

crystal polymers.

Sum-2014 3M

g) State general properties and applications of Liquid Crystal polymers.

Give applications of LCP

Win-2014

Sum-2015

4M

2 M

h) Enlist the applications of poly caprolactone biodegradable polymer. Also

give its synthesis and properties.

Sum-2015 4M

i) Discus the different phases of liquid crystal polymers. Win-2015 4M

j) Why polyaniline polymers are used in packaging of electronic products?

Write the general applications of conductive polymers.

Win-2015 3M

k) How composite materials are classified? Discuss the uses of composite

materials.

Win-2015 3M

l) What are composite materials? Give industrial applications of fibre

reinforced composite materials.

Sum-2016

Sum-2016

3M

4M

m) b) Give an account of synthesis, properties and applications of

polypyrole as a conducting polymer.

Sum-2016

Win-2016

4M

4 M

n) c) Differentiate between single wall carbon nanotube and multi wall Sum-2016 3M

14

carbon nanotube. Sum-2017 2M

o) Give an account of applications of nanomaterials in medicine &

environment.

Win-2016

Sum-2019

4 M

4 M

P What are nano materials? Give applications of nano materials in the field

of electronics and medicine.

Win-2017 4 M

Q What are liquid crystal polymers? Write on different phases of LCP. Win-2017 3M

R Write a note on conducting polymer with suitable example Win-2017 3M

S Write short notes on any two.

i) Liquid crystal polymers.

ii) Properties & applications of polyaniline

iii) Applications of nanomaterials in medicine.

Sum-2018 4M

T Write notes on

i) Biodegradable Polymer.

ii) Liquid crystal polymer.

Win-2018 6M

U Define Nanomaterial. Discuss the applications of nanomaterial in

electronics field.

Win-2018 4M

V What are carbon Nanotubes? Explain the single walled and multiwalled

carbon nanotubes?

Sum-2019 3M

w Write general properties and applications of liquid crystal polymers. Sum-2019 3M