Assignment Booklet

1

Assignment Booklet

BTME Programme

Fourth Year

BME 023 Advanced Manufacturing Technology

BME 024 Mechanical Engineering Design

BME 025 Condition Monitoring and Maintenance Engineering

BME 027 Heat and Mass Transfer

BME 028 Fluid Mechanics

BME 029 Robotics

BME 030 Safety Engineering (Elective Course0

BME 031 Energy Conversion

BME 035 Industrial Engineering and Operations Research

SCHOOL OF ENGINEERING & TECHNOLOGY

INDIRA GANDHI NATIONAL OPEN UNIVERSITY

Maidan Garhi, New Delhi – 110 068

JANUARY 2012

2

Q.1 (a) What is near “Netshape Manufacturing”? Explain the methods of near Netshape manufacturing.

(b) Describe the project growth for ‘Ceramic” near Net shape manufacturing. (4 + 6 = 10)

Q.2 (a) Explain about “Micro milling and Micro drilling”.

(b) What is nano-technology? Enumerate the properties and applications of “nano-technology materials.

(4 + 6 = 10)

Q.3 (a) What is “Hybrid Manufacturing Process” and describe about hybrid control?

(b) What do you understand by “Parallel Kinematics”? (5 + 5 = 10)

Q.4 (a) Explain the “Concurrent Engineering” along with its objectives.

(b) Explain the “Principle of Concurrent Engineering”. (4 + 6 = 10)

Q.5 (a) Explain the steps in “DFMA Process”.

(b) Explain the design for manufacturing and assembly. (5 + 5 = 10)

Q.6 (a) Write about QFD terminology.

(b) Explain in detail about “Kano’s Model”. (4 + 6 = 10)

Q.7 (a) What is prototyping? Explain its advantages and disadvantages.

(b) Explain about “Solid Ground Curing” (SGC).

(4 + 6 = 10)

Q.8 (a) Write about metal deposition tools?

(b) Explain about 3-DKEL tool process with its advantages and disadvantages.

(4 + 6 = 10)

Q.9 (a) What is reverse engineering? Write about the necessity of this reverse engineering.

(b) Explain about contact technique for data capture.

(5 + 5 = 10)

Q.10 (a) Explain about Local Area Network (LAN) and Wide Area Network (WAN) with reference to web based manufacturing.

(b) Explain the strategy of e-manufacturing.

(5 + 5 = 10)

TUTOR MARKED ASSIGNMENT

BME-023

ADVANCED MANUFACTURING TECHNOLOGY

Note : All questions are compulsory and carry equal marks. This assignment is based on all Blocks of Advanced Manufacturing Technology.

Maximum Marks : 100 Weightage : 30%

Course Code : BME-023 Last Date of Submission : October 30, 2012

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Q.1 Defind the following with their physical significance in mechanical design.

(i) Strain energy,

(ii) Factor of safety,

(iii) Creep,

(iv) Toughness and Resilience, and

(v) Stress concentration and stress concentration factor.

(10)

Q.2 (a) What is welded joint? How it is differ from riveted joint?

(b) A machine parts subjected to tension carries a stress concentration whose stress concentration factor Kt = 2.0. The UTS of steel is 700 MPa and notch radius is 1.5 mm.

The element in the form of a bar is subjected to σmax = 80 MPa and σmin = 20 MPa. The diameter of the bar is 12 mm. Find the factor of safety.

(5 + 5 = 10)

Q.3 (a) Describe the types of riveted joints with neat sketch.

(b) What types of joints are used in a boiler along its length and circumference? State the reasons.

(5 + 5 = 10)

Q.4 (a) How are the toothed gears classified? Explain with suitable sketch.

(b) A pinion of 100 mm pitch diameter running at 1400 rpm transmits 6.10 kw of power to a gear whose pitch diameter is 300 mm. For straight tooth, the angle of pressure is

(i) 20º

(ii) 14 1/2º

Determine the tangential force, the transverse or bending force on the shaft and torques on driving and driven shafts for (i) and (ii).

(5 + 5 = 10)

Q.5 (a) Explain the different causes of gear tooth failures and suggest possible remedies to avoid such failures.

(b) A shaft is required to transmit a power of 20 kw at 366 rpm. The force analysis due to attached parts results in bending moment of 820 Nm at a section between bearing. If permssible stresses in a shafts are 60 N/mm2 in bending and 40 N/mm2 in shear. Calculate the diameter of the shaft.

(5 + 5 = 10)


BME-024

MECHANICAL ENGINEERING DESIGN

Note : All questions are compulsory and carry equal marks. This assignment is based on all Blocks of Mechanical Engineering Design.



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Q.6 (a) List the important physical characteristics of a good bearing material. What are the commonly used materials for sliding contact bearings?

(b) A roller bearing having a mean diameter of 65 mm carries a radial load of 4500 N and rotates at 10000 rpm. Calculate the frictional power loss if bearing is lubricated by an oil

bath having a kinematic viscosity of 20 × 10– 6 m2/s. Effective coefficient of friction f1, the roller bearing (cylindrical) may taken as 0.0006 constant f2 for single row cylindrical

bearing under the condition of jet lubrication may taken as 6.0 × 103.

(5 + 5 = 10)

Q.7 (a) What materials are used to make flat belt? Sketch a pulley for flat belt and show various dimensions.

(b) Determine the maximum, minimum and average pressure in a plate clutch when the axial force is 4 kN. The inside radius of the contact surface is 55 mm and the outside radius is 100 mm. Assume uniform wear.

(5 + 5 = 10)

Q.8 (a) Describe different types of shafts. How will you calcualte load upon a shaft if it supports a pulley or when it supports a gear?

(b) The following are the data for a helical spring load for an engine :

Length of spring when valve is open : 40 mm

Length of spring when valve is closed : 50 mm

Spring load when valve is closed : 200 N

Maximum inside diameter of spring : 28 mm

Maximum permissible shearing stress for material of spring is 400 MPa and its modulus

of rigidity is 8 × 104 MPa. Design the spring take wahl factor

4 1 0.165

4 4

C

C C

−= +

−

where C = Spring index.

(5 + 5 = 10)

Q.9 (a) What are the materials used for brake lining? Discuss the different types of brakes giving at least one practical application for each.

(b) A square threaded screw is required to bore against an axial force of 6.0 kN and has follwoing dimensions :

Major diameter = 32 mm, Pitch p = 4 mm

With single start µ = 0.08 and axial force rotates with the screw.

Calculate :

(i) Torque required when screw moves against the load,

(ii) Torque requied when screw moves in the same direction at the load, and

(iii) Efficiency of the screw.

(5 + 5 = 10)

Q.10 (a) What are the application of springs? Define the term pitch and solid length used in connection with compression springs.

(b) The load on the journal bearing is 150 kN due to turbine shaft of 300 mm diameter running at 1800 rmp. Determine the following :

(i) Length of the bearing if the allowable bearing pressure is 1.6 N/mm2, and

(ii) Amount of heat is to be removed by the lurbicant per minute if the bearing temperature is 60oC and the viscosity of the oil at 60oC is 0.02 kg/ms and the bearing clearnace is 0.25 mm.

(5 + 5 = 10)

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Q.1 (a) What is maintenance or plant engineering? Explain the need for maintenance.

(b) Explain the different states of “plant” with reference to maintenance engineering functions.

(4 + 6 = 10)

Q.2 (a) Write down about TPM or Tero Technology.

(b) Explain the centralized and decentralized systems of plant engineering with their functions and advantages.

(4 + 6 = 10)

Q.3 (a) Discuss about Time Based Maintenance.

(b) What are the factors influencing the selection of maintenance strategy?

(5 + 5 = 10)

Q.4 (a) Describe the classification of “spare parts”?

(b) Explain the general coding of spare parts with its advantages and disadvantages.

(6 + 4 = 10)

Q.5 (a) Describe the concept of ‘FEMA’. What are the steps in analysis procedure for FMEA?

(b) Explain about 3-stage application of ‘SPC’ in FMECA?

(6 + 4 = 10)

Q.6 (a) Explain with diagram, the maintenance information system for CBM.

(b) Describe the techniques of ‘Condition Monitoring”.

(5 + 5 = 10)

Q.7 (a) The cost of a machine is Rs. 15000 and its scrap value is only Rs. 1500. The maintenance costs are found from experience are as given hereunder. Find, when should the machine be replaced.

Year 1 2 3 4 5 6 7 8

Maintenance Cost (Rs.)

150 200 300 450 650 850 900 1800

(b) Discuss the methods of “Trend Analysis”.

(5 + 5 = 10)


BME-025

CONDITION MONITORING AND MAINTENANCE ENGINEERING

Note : All questions are compulsory and carry equal marks. This assignment is based on all Blocks of Condition Monitoring and Maintenance Engineering.



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Q.8 (a) Write short notes on the following with reference to reliability studies of equipment failure :

(i) Exponential distribution,

(ii) Weibull distribution,

(iii) Lognormal distribution, and

(iv) Normal distribution.

(b) What is TTT plotting? Discuss any one method.

(6 + 4 = 10)

Q.9 (a) What is the significance of “Condition Based Maintenance”?

(b) Explain about

(i) Destructive tests, and

(ii) Non-destructive tests.

(5 + 5 = 10)

Q.10 (a) What do you understand by “Quality” and “Reliability”?

(b) Consider a ‘combined system’ as shown below with reliability of each element. Find the overall reliability of the total system.

(4 + 6 = 10)

0.7

0.8

0.9

0.6

0.7

0.6

0.9

0.9

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Q.1 (a) A black metal plate (k = 25 W/m/K) at 300oC is exposed to surrounding air at 30oC.

It convects and radiates heat to surroundings. If the convection coefficient is 25 W/m2.K. What is the temperature gradient in the plate?

(b) A large window glass 0.5 cm thick (k = 0.78 W/m.K) is exposed to warm air at 25oC, over its inner surface, with convection coefficient of 15 W/m2.K. The outside air is at 15oC with convection coefficient of 50 W/m2.K. Determine the heat transfer rate and temperature at the inner and outer surface of the glass.

Q.2 (a) Estimate the diffusion rate of water from the bottom of the test tube 1.5 cm in diameter and 15 cm long into dry atmospheric air at 25oC.

Take diffusion coefficient of 25.6 × 10– 6 m2/s.

(b) The wall of a cold storage consists of three layers- an outer layer of ordinary bricks, 25 cm thick, a middle layer of cork, 10 cm thick and an inner layer of cement, 6 cm thick. The thermal conductivities of the materials are 0.7, 0.043 and 0.72 W/m/K, respectively. The temperature of the outer surface of the wall is 30oC and that of inner is – 15oC. Calculate :

(i) Steady state rate of heat gain per unit area,

(ii) Temperature at the interfaces of composite wall,

(iii) The percentage of total heat resistance offered by individuals layers, and

(iv) What additional thickness of crok should be provided to reduce the heat gain 30% less than the present value?

Q.3 (a) An exterior wall of a house consists of a 10.16 cm layer of common brick having thermal conductivity 0.7 W/m K. It is followed by a 3.8 cm layer of gypsum plaster with thermal conductivity of 0.48 W/m.K. What thickness of loosely packed rockwool insulation (k = 0.056 W/m.K) should be added to reduce the heat loss through the wall by 80%.

(b) A square plate heater (size : 15 cm × 15 cm) is inserted between two slabs, slab A is 2 cm thick (k = 50 W/m.K) and slab B is 1 cm thick (k = 0.2 W/m.K). The outside heat transfer coefficient on both sides A and B are 200 and 50 W/m2.K, respectively. The temperature of surrounding air is 25oC. If the rating of the heater is 1 kW, find.

(i) Maximum temperature in the system.

(ii) Outer surface temperature of two slabs.

Draw equivalent electrical circuit of the system.


BME-027

HEAT AND MASS TRANSFER

Note : All questions are compulsory and carry equal marks. This assignment is based on all Blocks of Heat and Mass Transfer.


Course Code: BME- 027 Last Date of Submission : October 30, 2012

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Q.4 (a) Consider a 5 m high and 8 m long and 0.22 m thick wall whose representation is shown in Figure 1. The thermal conductivity of various materials used are kA = kF = 2, kB = 8, kC = 20, kD = 15 and kE = 35 W/m.K. The left surface of the wall is maintained at uniform temperature of 300oC. The right surface is exposed to convection environment at 50oC with h = 20 W/m2.K. Determine : (i) one dimensional heat transfer rate through the wall, (ii) temperature at the point where section B, D and E meet, and (iii) temperature drop across the section F.

(a) Schematic

(b) Equivalent Thermal Network

Figure 1

(b) A 3 m high and 5 m wide wall consists of 16 cm × 22 cm cross-section horizontal bricks (k = 0.72 W/m.K) separated by 3 cm thick mortar layers (k = 0.25 W/m.K). The brick wall also consists of 2 cm thick plaster (k = 0.22 W/m.K) layers on each side of brick and 3 cm thick rigid foam (k = 0.026 W/m.K) on the inner side of the wall as shown in Figure 2. The indoor and outdoor temperatures are 20 and – 10oC and convection heat transfer coefficients on inner and outer sides 10 W/m2.K and 25 W/m2K respectively. Assume one dimensional heat transfer and disregard radiation, determine the rate of heat transfer through the wall.

(a) Schematic

(b) Equivalent Thermal Network

Figure 2

T1=300° C

6 cm D

F E

Q

4 cm

4 cm

6 cm

A

5 cm 10 cm 6 cm 1 cm

100 cm

T2

C

C 4 cm

T∞ = 50°C h = 20 W/m

2K

Rc RD

Rs

Rc RE

T3 RF T4 T ∝ RA T1 T2

Rconv

Plaster

Mortar

1.5

1.5

25 cm

Outdoor

T∝2 = - 10° C

h2 =25 W/m2 K

Brick

4

3 2 1

3

2

3 cm

3 cm

3 2

16 cm 2

h1 =10 W/m2. K

T∝1 = 20° C

Indoor

Foam

22 cm

T∝1

R conv,1 R1 R2

R3

R4

R3 R2 R conv,2

T∝2 Q

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Q.5 (a) A layer of 5 cm refractory brick (k = 2 W/m.K) is to be placed between two 4 mm thick steel (k = 40 W/m.K) plates. The both faces of brick adjacent to the plates have rough solid to solid contact over 20% of the area, where the average height of asperities are 1 mm. The outer surface temperature of steel plates are 400oC and 100oC, respectively :

(i) Find the rate of heat flow per unit area and assume that the cavity area is filled with air (k = 0.02 W/m.K).

(ii) Find the rate of heat flow if the faces of brick are smooth and have solid to solid perfect contact over entire area.

(b) A furnace wall is made of three layers. First layer is of insulation (k = 0.6 W/m.K), 12 cm thick. Its face is exposed to gases at 870oC with convection coefficient of (100 W/m2K). It is covered with (backed with), a 10 cm thick layer of fire brick (k = 0.8 W/m.K) with a

contact resistance of 2.6 × 10– 4 m2.K/W between first and second layer. The third layer is a plate of 10 cm thickness (k = 4 W/m.K) with a contact resistance between second

and third layer of 1.5 × 10– 4 m2.K/W. The plate is exposed to air at 30oC with convection coefficient of 15 W/m2.K. Determine the heat flow rate and overall heat transfer coefficient.

Q.6 (a) A steam pipe is covered with two layers of insulation, first layer being 3 cm thick and second 5 cm. The pipe is made of steel (k = 58 W/m.K) having ID of 160 mm and OD of 170 mm. The inside and outside film coefficients are 30 and 5.8 W/m2.K., respectively. Calculate the heat lost per metre of pipe, if the steam temperature is 300oC and air temperature is 50oC. The thermal conductivity of two insulating materials are 0.17 and 0.093 W/m.K, respectively.].

(b) A steam pipe of 5 cm inside diameter and 6.5 cm outside diameter is insulated with a 2.75 cm radial thickness of high temperature insulation steel (k = 1.1 W/m.K). The surface heat transfer coefficient for inside and outside surfaces are 4650 W/m2.K and 11.5 W/m2.K respectively. The thermal conductivity of the pipe material is 45 W/m.K. If the steam temperature is 200oC and ambient air temperature is 25oC, determine :

(i) Heat loss per metre length of pipe.

(ii) Temperature at the interface.

(ii) Overall heat transfer coefficient.

Q.7 (a) The two insulation materials are purchased in powder form as A and B with thermal conductivities 0.005 and 0.035 W /m.K, respectively. These materials were to apply over a 40 cm diameter sphere as inner layer 4 cm thick and outer layer 5 cm thick, respectively. But due to laps of attention, the material B was applied as first layer and subsequently material A as outer layer. Estimate its effect on conduction heat transfer.

(b) Two long rods of the same diameter, one made of brass (k = 85 W/m.K.) and other made of copper (k = 375 W/m.K) have one of their ends inserted into a furnace. Both the rods are exposed to same environment. At a distance of 105 mm away from the furnace, the temperature of brass rod is 120oC. At what distance from the furnace, the same temperature would be reached in the copper rod?

Q.8. (a) Two ends of a fin of the cross-sectional area 2 cm2, perimeter 2 cm, 100 cm long are maintained at 127oC and 227oC, respectively. It losses heat from the surface due to natural convection to surroundings at 27oC with heat transfer coefficient of 5 W/m2.K. Thermal conductivity of fin material is 45 W/m.K. Find the minimum temperature in the fin and its location. Also calculate the heat conducted from each end.

(b) A steel ball of 50 mm diameter and at 900oC temperature is placed in still air at temperature of 30oC. Calculate the initial rate of cooling of ball in oC/min. Take h = 30 W/m2.K and thermo-physical properties of steel as :

ρ = 7800 kg/m3, C = 2 kJ/kg.K

Neglect internal thermal resistance.

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Q.9 (a) An aluminum sphere weighing 6 kg and initially at temperature of 350oC is suddenly immersed in a fluid at 30oC with convection coefficient of 60 W/m2.K. Estimate the time required to cool the sphere to 100oC. Take thermo-physical properties as :

C = 900 J/kg.K, ρ = 2700 kg/m3, k = 205 W/m.K

(b) An aluminum cylinder (k = 210 W/m.K) 50 mm in diameter and 10 cm long is initially at uniform temperature of 200oC is plunged into a quenching bath at 10oC. Take (h = 530 W/m2.K), what is the temperature on centerline of the cylinder after one minute.

Q.10 (a) Air at 50oC and 1 atm flow over the surface of a water reservoir at an average velocity of 2.3 m/s. The water surface is 0.65 m long and 0.65 m wide. The water surface temperature is estimated at 30oC. The relative humidity of air is 40%. The density of air

is 1.105 kg/m3 and its viscosity is 1.943 × 10– 5 kg/m.s. Calculate the amount of water vapour evaporates per hour per sq-m of water surface and state the direction of diffusion.

(b) A tray 40 cm long and 20 cm wide is full of water. Air at 30oC flows over the tray along the length at 2 m/s. The moving air at 1.013 bar and partial pressure of water in the air is 0.007 bar. Calculate the rate of evaporation, if the temperature of the water is 25oC.

Take for air ρ = 1.2 kg/m3, ν = 15 × 10– 6 m2/s.

DAB = 0.145 m2/h.

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Q.1 (a) If the equation of a velocity distribution over a plate is given by v = 2y – y2, in which v is

the velocity in m/s at a distance y, measured in meters above the plate, what is the velocity gradient at the boundary and at 7.5 cm and 15 cm from it? Also determine the

stress at these points if absolute viscosity µ = 8.60 poise.

(b) An iceberg weighing 8976 N/m3 floats in the ocean with a volume of 600 m3 above the surface. Determine the total volume of the iceberg if specific weight of ocean water is 10055 N/m3.

Q.2 (a) The Velocity components in the x- and y-directions are given as 3

22

3

xyu x y

= −

and

32 2

3

yxv xy

= −

. Indicate whether the given velocity distribution is a possible field of

flow or not.

(b) If the expression for the stream function is described by 3 23x xyψ = − , indicate whether

the flow is rotational or irrotational. If the flow is irrotational determine the value of the velocity potential.

Q.3 (a) If the volume of a liquid decreases by 0.2 per cent for an increase of pressure from 6.867 MN/m2 to 15.696 MN/m2, what is the value of the bulk modulus of the liquid?

(b) Oil of specific gravity 0.90 flows in a pipe 300 mm diameter at the rate of 120 litres per second and the pressure at a point A is 24.525 kPa (gage). If the point A is 5.2 m above the datum line, calculate the total energy at point A in terms of metres of oil.

Q.4 (a) A circular orifice of area 6.45 × 10– 4 m2 is provided in the vertical side of a large tank. The tank is suspended from a knife edge 1.53 m above the level of the orifice. When the head of water is 1.22 m, the discharge is 1161.5 N/min and a turning moment of 14.421 N-m has to be applied to the knife edges to keep the tank vertical. Determine Cv, Cd and Cc of the orifice.

(b) Water under a constant head of 3 m discharge through an external cylindrical mouthpiece 50 mm diameter, for which Cv = 0.82, determine (i) the discharge in cumec and (ii) absolute pressure at vena-contracta; and the maximum head for the mouthpiece to flow full.

Q.5 (a) Derive an expression for mean velocity for laminar flow (i) through a pipe and (ii) between parallel plates.

(b) What do you understand by hydro dynamically smooth and rough pipes.


BME-028

FLUID MECHANICS

Note : All questions are compulsory and carry equal marks.



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Q.6 (a) The population of a city is 800 000 and it is to be supplied with water from a reservoir 6.4 km away. Water is to be supplied at the rate of 140 liters per head per day and half the supply is to be delivered in 8 hours. The full supply level of the reservoir is R. L. 180.00 and its lower water level is R. L. 105.00. The delivery end of the main at R. L. 22.50 and the head required there is 12 m. Find the diameter of the pipe. Take f = 0.04.

(b) A compound piping system consist of 1800 m of 0.50 m, 1200 m of 0.40 m and 600 m of 0.30 m new cast iron pipes connected in series. Convert the system to (i) an equivalent length of 0.40 m pipe and (ii) and equivalent size pipe 3600 m long.

Q.7 (a) The velocity distribution in the boundary layer is given as 23 1

2 2

v

V= η − η in which

y η = δ

, compute *δ

δ and

θ δ

.

(b) Given that a laminar boundary layer at zero pressure gradient over a flat plate is

described by the velocity profile 0

sin2

y

V

ν π = δ

.

Determine the momentum correction coefficient (or factor) and the energy correction coefficient (or factor).

Also show that boundary layer thickness δ, wall shear stress τ0 and coefficient of drag CD

are given by 2

00

0.3284.795 1.312; ;

Re Re ReD

x x x

VxC

ρδ = τ = = , where symbols have their usual

meaning.

Q.8 (a) Find the ratio of skin friction drag on the front two-third and rear one-third of a flat plate kept in a uniform stream at zero incidence. Assume the boundary layer to be turbulent over the entire plate.

(b) For laminar flow of an oil having dynamic viscosity µ = 1.766 Pa.s in a 0.3 m diameter pipe, the velocity distribution is parabolic with a maximum point velocity of 3 m/s at the centre of the pipe. Calculate the shearing stresses at the pipe wall and within the fluid 50 mm from the pipe wall.

Q.9 (a) Show by method of dimensional analysis that the resistance R to the motion of a sphere

of diameter D moving with uniform velocity V through a fluid having density ρ and

viscosity µ may be expressed as :

2( )R D Vv D

µ= ρ φ ρ

Also show that the above expression reduces to R = k µ VD when the motion is through viscous fluid at low velocity, where k is a dimensionless constant.

(b) Find the viscosity in poise of a liquid through with a steel ball of diameter 1 mm falls, with a uniform velocity of 20 mm/s. The specific gravity of the liquid is 0.91 and that of the

steel is 7.8. Given that k = 3π.

(b) Assuming that rate of discharge Q of a centrifugal pump is dependent upon the mass

density ρ of fluid, pump speed N (rpm), the diameter of impeller D, the pressure p and

the viscosity of fluid µ, show using the Buckingham’s π-theorem that it can be represented by

3

2 2 2( ) ,

gHQ ND

N D ND

υ = φ

where H = head and ν = kinematic viscosity of the fluid.

13

Q.10 (a) An oil having viscosity of 1.43 poise and specific gravity 0.9 flows through a pipe 25 mm diameter and 300 m long at 1/10 of the critical velocity for which Reynolds number is 2500. Find (i) the velocity of flow through the pipe; (ii) the head in metres of oil across the pipe length required to maintain the flow and (iii) the power of the flow.

(b) Two parallel plates kept 75 mm apart have laminar flow of glycerine between them with a maximum velocity of 1 m/s. Calculate the discharge per metre width, the shear stress at the plates, the difference in pressure in pascals (or N/m2) between two points 25 m apart, the velocity gradients at the plates and velocity at 15 mm from the plate. Take viscosity of glycerine as 8.35 poise.

14

Q.1 (a) What are the applications of robots in space, homes and hospitals?

(b) What are the types of robots?

Q.2 (a) What are the difference between a robot and CNC machine tools?

(b) Why transmissions are used in robot manipulators?

Q.3 (a) Why ADC and DAC are requried in robots?

(b) Which components basically provide the mechanical motion? In this regard, specify the type of actuators used in robots.

Q.4 (a) What is a machine vision and what are the sensor components in a vision system?

(b) Find out the DH parameters of the SCARA robot as shown in Figure 1.

Figure 1 : SCARA Robot

Q.5 For the following homogeneous transformation matrix between any two coordinate frames, find out the value of the missing elements :

0.866 ? ? 5

5 ? ? 6

? ? 1 0

0 0 0 ?

Draw the sketch of the two frames.


BME-029

ROBOTICS

Note : All questions are compulsory and carry equal marks. This assignment is based on all

Blocks of Robotics.



BTME

Z 1 Z 1 Z 3, Z 4

b3

b4 θ4

q4

b4

Q4

Q1

q4

15

Q.6 Using block diagrams define forward and inverse kinematics of a robot. Why are they useful for a robot?

Q.7 Find the overall transformation matrix for the Prismatic-Revolute planar arm robot, as shown in Figure 2.

Figure 2 : Prismatic-Revolute Planar Arm

Q.8 How the study of singularity helps in robot analysis?

Q.9 How parallel- and perpendicular-axis theorems are useful for the determination of mass moment of inertia for complex shapes?

Q.10 Derive the Euler-Lagrange (EL) equations of motion for the Prismatic-Revolute (PR) manipulator shown in Figure 2.

Y1

P

b1

a1 EE

θ2 Y2 Z1

X2

R

(x, y)

16

Q.1 (a) What do you understand by safety engineering? What are the functions and benefits of

safety engineering?

(b) What are the purposes of occupational health and safety acts?

(5 + 5 = 10)

Q.2 (a) What are the factors affecting and controlling the occupational health?

(b) Discuss the various disabilities resulting from an accident

(5 + 5 = 10)

Q.3 (a) Explain about the following :

(i) Hazard analysis, and

(ii) Steps for prevention.

(b) Discuss about ‘Cost of Accidents”. How do you reduce the same?

(5 + 5 = 10)

Q.4 (a) Describe about the principles of gas detection in industrial environment.

(b) Write about safety and health audits.

(5 + 5 = 10)

Q.5 (a) What is ISO 14000? Explain about ISO 14001 standard.

(b) What are the provisions in factory act 1948 on health and safety.

(6 + 4 = 10)

Q.6 (a) Write down the effects of pollution.

(b) Brief about specific pollutants.

(4 + 6 = 10)

Q.7 (a) What is “Incinerator”? Discuss the process with diagram.

(b) Explain about the process of “Biomethavation”.

(5 + 5 = 10)

Q.8 (a) What is disaster? Explain about disaster classification.

(b) Discuss about

(i) Illiteracy and safety, and

(ii) Ethics and safety.

(5 + 5 = 10)


BME-030

SAFETY ENGINEERING

Note : All questions are compulsory and carry equal marks.


Course Code : BME- 030 Last Date of Submission : October 30, 2012

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Q.9 (a) What is recycling? What are the reasons for recycling?

(b) Discuss about recycling of paper and paper board.

(5 + 5 = 10)

Q.10 (a) Discuss about hazardous waste.

(b) How the hazardous waste is treated?

(5 + 5 = 10)

18


BME 031

ENERGY CONVERSION

Note : All questions are compulsory and carry equal marks. This assignment is based on all Blocks of Computer Aided Process Planning.


Course Code : BME 031 Last Date of Submission : October 30, 2012

BTME

Q.1 (a) What do you understand by energy? Describe forms of energy, their sources and state

how they are used in practice?

(b) Explain the application of engineering sciences to energy conversion systems.

(5 + 5 = 10)

Q.2 (a) Which are the physical laws of combustion? Explain in brief.

(b) What do you mean by mass fraction and mole fraction?

(5 + 5 = 10)

Q.3 (a) Explain a solar power plant with neat sketch.

(b) A photovoltaic array of 0.8 m2 is designed to pump 15 m3 of water daily from a depth of 36 m. If the daily radiation is 8 kN hr/m2, determine the system’s efficiency.

(5 + 5 = 10)

Q.4 (a) How are chemical fuels classified? How does a chemical fuel differ from a nuclear fuel?

(b) Explain a role of biogas generating system for controlling environmental pollution.

(5 + 5 = 10)

Q.5 (a) What are the important elements of steam turbine? Describe the types and function of one element.

(b) Steam enters a condenser with enthalpy 1810 kJ/kg and leaves it with enthalpy of 200 kJ/kg. The ratio of cooling water flow is 200 kg/hr at a temperature of 25oC and water exists at a temperature of 87oC find the amount of condensate. Cp for water 4.2 kJ/kg.

(5 + 5 = 10)

Q.6 (a) What is meant by regeneration in a steam power plants? Describe a regenerative cycle with the help of temp-entropy diagram and sketch a steam power plant.

(b) With the help of a sketch describe a closed cycle gas turbine power plant. Mention fuels used in gas turbines.

(5 + 5 = 10)

Q.7 (a) What are manufactured solid fuels? Describe their properties and applications.

(b) Determine the products of combustion and air fuel ratio by height when fuel with chemical formula C7H16 is burned with 20% excess air.

(5 + 5 = 10)

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Q.8 (a) Make a list of equipment for handling coal and ash in a power plant. Describe a pneumatic conveyor.

(b) Explain the requirement of different A/F ratios in an IC engine operation.

(5 + 5 = 10)

Q.9 (a) Explain with the help of a neat diagram the arrangement of the Fluidized Bed Combustion (FBC) system.

(b) What is the difference between ultimate analysis and proximate analysis of coal?

(5 + 5 = 10)

Q.10 (a) Explain the classification of boilers.

(b) What is the effect of fly ash on the environment? Discuss in brief the necessary steps to be taken to handle fly ash and make the environment eco-friendly.

(5 + 5 = 10)

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Q.1 (a) Discuss the importance of Industrial Engineering. Describe the tools and techniques of

Industrial Engineering being used in industries.

(b) Define Productivity. How productivity is related with production?

Q.2 (a) What is the importance of string diagram in industrial engineering? Discuss the situations where string diagrams are being used. With help of an example, describe the string diagram.

(b) Using the following cost matrix, determine (i) optimal job assignment and (ii) cost of assignment :

Jobs

1 2 3 4 5

A 10 3 3 2 8

B 9 7 8 2 7

C 7 5 6 2 4

D 3 5 8 2 4

Mechanic

E 9 10 9 6 10

Q.3 (a) Define Method Study. What are its objectives? Differentiate between work measurement and method study.

(b) Explain the significance, construction and the applications of the following recording techniques :

(i) Operation Process Chart,

(ii) Flow Process Chart, and

(iii) Multiple Activity Chart.

Q.4 (a) What is the performance rating? Why is it required to rate the worker? What are the different rating methods.

(b) Explain the various types of element with example of each.

(c) What is work sampling? What are its merits and limitations? In which area of production it can be useful?

Q.5 (a) What are the needs for organizations to design and develop new products?

(b) Explain the functional and operational aspects of product design.

(c) Explain the quality and reliability aspects of product design.


BME-035

INDUSTRIAL ENGINEERING AND OPERATIONS RESEARCH

Note : All questions are compulsory and carry equal marks. This assignment is based on all

Blocks of Industrial Engineering and Operations Research.



BTME

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Q.6 (a) Write short note on following :

(i) Aesthetic aspects of Product Design

(ii) Environmental consideration in Product Design

(b) What is Ergonomics? How Ergonomics is applied for Product Design? List out various advantages of applying Ergonomics in Industrial Design.

Q.7 (a) What is System? Explain various aspects of man-machine system.

(b) How the environmental factors affect the man-machine system?

Q.8 A diet for sick person must contain at least 4000 units of vitamins, 50 units of minerals and 1400 units of calories. Two foods A and B are available at a cost of Rs. 4/- and Rs. 3/- per unit respectively. If one unit of A contains 200 units of vitamins, 1 unit of minerals and 40 units of calories and 1 unit of food. B contains 100 units of vitamins, 2 unit of minerals and 40 units of calories. Find by the graphic, what combination of foods be used to have least cost. Also solve the problem by SIMPLEX method.

Q.9 (a) A company has three plants A, B and C, 3 warehouses X, Y and Z. The number of units available at the plants is 60, 70 and 80 and the demand at X, Y and Z are 50, 80 and 80, respectively. The unit cost of the transportation is given in the following table :

X Y Z

A 8 7 3

B 3 8 9

C 11 3 5

Find the allocation with the help of Vogel’s Approximation Method so that the total transportation cost is minimum. Also, conduct optimality check.

(b) Describe the transportation model. Also discuss various methods to solve the transportation problems.

Q.10 (a) What is simulation? Discuss the usefulness of simulation in industrial engineering.

(b) Give the comprehensive explanation of the Game Theory. Explain the following terms with respect to the Game Theory :

(i) Pure Strategy,

(ii) Mixed Strategy, and

(iii) Optimal Strategy.

Documents

Assignment Booklet