Casting Question Set-2014

Q ti t 2014Question set‐2014Please check answer from my PPTy M t l C tiMetal Casting

B S K M d lBy S K Mondal

IES‐2001

The main purpose of chaplets is

(a) To ensure directional solidification

(b) To provide efficient venting

(c) For aligning the mold boxes

(d) T h(d) To support the cores

IES‐1996Which of the following methods are used for

bt i i di ti l lidifi ti f i d iobtaining directional solidification for riser design

1. Suitable placement of chills1. Suitable placement of chills

2. Suitable placement of chaplets

3. Employing padding

Select the correct answer.

( ) d (b) d ( ) d (d) d(a) 1 and 2 (b) 1 and 3 (c) 2 and 3 (d) 1, 2 and 3

IES 2007

Which one of the following is the correctt t t?statement?Gate is provided in moulds to(a) Feed the casting at a constant rate(b) Give passage to gases( ) p g g(c) Compensate for shrinkage(d) Avoid cavities(d) Avoid cavities

GATE‐2009

Match the items in Column I and Column IIMatch the items in Column I and Column II.Column I Column IIP Metallic Chills 1 Support for the coreP. Metallic Chills 1. Support for the coreQ. Metallic Chaplets 2. Reservoir of the molten metalR Riser 3 Control cooling of critical R. Riser 3. Control cooling of critical

sectionsS Exothermic Padding 4 Progressive solidificationS. Exothermic Padding 4. Progressive solidification(a) P‐1,Q‐3, R‐2, S‐4 (b) P‐1,Q‐4, R‐2, S‐3(c) P 3 Q 4 R 2 S 1 (d) P 4 Q 1 R 2 S 3(c) P‐3, Q‐4, R‐2, S‐1 (d) P‐4, Q‐1, R‐2, S‐3

GATE‐1992In a green‐sand moulding process, uniform ramming leads to(a) Less chance of gas porosity(b) Uniform flow of molten metal into the mould (b) Uniform flow of molten metal into the mould cavity(c) Greater dimensional stability of the casting(c) Greater dimensional stability of the casting(d) Less sand expansion type of casting defect

GATE 2011Green sand mould indicates thatGreen sand mould indicates that(a) polymeric mould has been cured(b) mould has been totally dried(c) mould is green in colour( ) g(d) mould contains moisture

IES‐1995Which one of the following materials will require

the largest size of riser for the same size of casting?the largest size of riser for the same size of casting?

(a) Aluminium( )

(b) Cast iron

(c) Steel

(d) Copper.

For 2014 (IES, GATE & PSUs) Page 1 of 17

GATE‐1999

Which of the following materials requires thel t h i k ll hil kilargest shrinkage allowance, while making apattern for casting?( ) l(a) Aluminium(b) Brass(c) Cast Iron(d) Plain Carbon Steel(d) Plain Carbon Steel

IES‐1999I lidifi ti f t l d i tiIn solidification of metal during casting,

compensation for solid contraction isp

(a) Provided by the oversize pattern

(b) Achieved by properly placed risers

(c) Obtained by promoting directional

lidifi isolidification

(d) Made by providing chills(d) Made by providing chills

ISRO‐2007Shrinkage allowance is made by( ) dd l d l d(a) Adding to external and internal dimensions(b) Subtracting from external and internaldimensions(c) Subtracting from external dimensions and( ) gadding to internal dimensions(d) Adding to external dimensions and subtracting(d) Adding to external dimensions and subtractingfrom internal dimensions

GATE‐2001Shrinkage allowance on pattern is provided tocompensate for shrinkage whenp g(a) The temperature of liquid metal drops from

pouring to freezing temperaturepouring to freezing temperature(b) The metal changes from liquid to solid state at

freezing temperaturefreezing temperature(c) The temperature of solid phase drops from

f ifreezing to room temperature(d) The temperature of metal drops from pouring

to room temperature

GATE‐2004

Gray cast iron blocks 200 x 100 x 10 mm are to bet i d ld Sh i k ll fcast in sand moulds. Shrinkage allowance for

pattern making is 1%. The ratio of the volume oftt t th t f th ti ill bpattern to that of the casting will be

(a) 0.97 (b) 0.99 (c) 1.01 (d) 1.03

GATE‐2008

While cooling, a cubical casting of side 40 mm

undergoes 3%, 4% and 5% volume shrinkage

during the liquid state, phase transition and solid

state respectively The volume of metalstate, respectively. The volume of metal

compensated from the riser is

(a) 2% (b) 7% (c) 8% (d) 9%

GATE 2011A cubic casting of 50 mm side undergoes volumetricA cubic casting of 50 mm side undergoes volumetricsolidification shrinkage and volumetric solidcontraction of 4% and 6% respectively No riser iscontraction of 4% and 6% respectively. No riser isused. Assume uniform cooling in all directions. Theside of the cube after solidification and contraction isside of the cube after solidification and contraction is(a) 48.32 mm(b) 49.90 mm(c) 49.94 mm49 94(d) 49.96 mm

IAS‐1995A i (A) A i d l i ilAssertion (A): A pattern is made exactly similar tothe part to be cast.R (R) P i d k h ldReason (R): Pattern is used to make the mouldcavity for pouring in molten for casting.( ) B h A d R i di id ll d R i h(a) Both A and R are individually true and R is thecorrect explanation of A(b) B h A d R i di id ll b R i h(b) Both A and R are individually true but R is not thecorrect explanation of A( ) A i b R i f l(c) A is true but R is false(d) A is false but R is true

IAS‐2003M h Li I (M i l b ) i h Li IIMatch List I (Material to be cast) with List II(Shrinkage Allowance in mm/m) and select thecorrect answer using the codes given below the lists:correct answer using the codes given below the lists:List‐I List‐II(Material to Cast) (Shrinkage Allowance in mm/m)(Material to Cast) (Shrinkage Allowance in mm/m)(A) Grey cast iron 1. 7 ‐ 10(B) Brass 2 15(B) Brass 2. 15(C) Steel 3. 20(D) Zinc 4 24(D) Zinc 4. 24

Codes:A B C D A B C D(a) 1 2 3 4 (b) 3 4 1 2(a) 1 2 3 4 (b) 3 4 1 2(c) 1 4 3 2 (d) 3 2 1 4For 2014 (IES, GATE & PSUs) Page 2 of 17

IES‐1994Which of the following materials can be used for

making patterns?making patterns?

1. Aluminium 2. Wax 3. Mercury 4. Lead3 y 4

Select the correct answer using the codes given below:

Codes:

(a) 1,3 and 4 (b) 2,3 and 4 (c) 1, 2 and 4 (d) 1, 2 and 3

GATE‐2000

Disposable patterns are made of

(a) Wood

(b) Rubber

(c) Metal

(d) P l(d) Polystyrene

IES‐2008

The pattern adopted for those castings where thereti hi h t t ll k dare some portions which are structurally weak and

are likely to break by the force of ramming arell dcalled:

(a) Loose piece pattern(b) Follow board pattern(c) Skelton pattern( ) p(d) Single piece pattern

GATE 2012 (PI)( )In sand casting, fluidity of the molten metali ithincreases with(A) increase in degree of superheat(B) decrease in pouring rate(C) increase in thermal conductivity of the mould( ) y(D) increase in sand grain size

ISRO‐2011Fluidity in casting (CI) operation is greatly

i fl d binfluenced by

a) Melting temperature of molten metala) Melting temperature of molten metal

b) Pouring temperature of molten metalb) Pouring temperature of molten metal

c) Finish of the mould)

d) Carbon content of molten metal

Calculate the permeability number of sand if it takes 1 min 25 s to pass 2000 cm3 of air at a pressure of5 g/cm2 through the standard sample.

25.0 /1min 25 1 417 min

p g cmT s== =1min 25 1.417 min

501.28 70.755 1 417

T s

R

= =

= =5 1.417×

IES 2007What is permeability? Permeability is more important

in the basic process of sand casting than porosity. Give

i t t f thi f tone important reason for this feature.

[2 marks][2 marks]

IES‐2002Assertion (A): In CO casting process the mould orAssertion (A): In CO2 casting process, the mould orcore attains maximum strength.Reason (R): The optimum gassing time of COReason (R): The optimum gassing time of CO2through the mould or core forms Silica Gel whichimparts sufficient strength to the mould or coreimparts sufficient strength to the mould or core.(a) Both A and R are individually true and R is thecorrect explanation of Acorrect explanation of A(b) Both A and R are individually true but R is not thecorrect explanation of Acorrect explanation of A(c) A is true but R is false(d) A i f l b t R i t(d) A is false but R is true

GATE 2008 (PI)GATE – 2008 (PI)In sand casting of a hollow part of lead, a cylindrical coreg p , y

of diameter 120 mm and height 180 mm is placed inside

the mould cavity. The densities of core material and lead

are 1600 kg/m3 and 11 300 kg/m3 respecti el The netare 1600 kg/m3 and 11,300 kg/m3 respectively. The net

force (in N) that tends to lift the core during pouring of( ) g p g

molten metal will be

(a) 19.7 (b) 64.5 (c) 193.7 (d) 257.6


IES‐2008

Small amount of carbonaceous material sprinkled

on the inner surface of mould cavity is called

(a) Backing sand

( )(b) Facing sand

(c) Green sand(c) Green sand

(d) Dry sand(d) Dry sand

IES‐2002In the grain ‐size determination using standard

charts, the relation between the given sizecharts, the relation between the given size

number n and the average number of grains 'N'

per square inch at amagnification of 100 X is

( ) N n(a) N = 2n

(b) N = 2n‐l(b) N 2

(c) N = 2n + 1

(d) N = 2n + 1

IES 2011In light metal casting runner should be so designedIn light metal casting, runner should be so designedthat:

It id i ti1. It avoids aspiration2. It avoids turbulence3. The path of runner is reduced in area so that

unequal volume of flow through each gateq g gtakes place

(a) 1 and 2 only (b) 1 and 3 only(a) 1 and 2 only (b) 1 and 3 only(c) 2 and 3 only (d) 1, 2 and 3

G 20 0 ( )GATE – 2010 (PI)D i h filli f i d ld i bDuring the filling process of a given sand mould cavity by

molten metal through a horizontal runner of circular cross‐

section the frictional head loss of the molten metal in the

runner will increase with therunner will increase with the

(a) increase in runner diameter

(b) decrease in internal surface roughness of runner

(c) decrease in length of runner

(d) increase in average velocity of molten metal(d) increase in average velocity of molten metal

IES 2011IES 2011Match List –I with List –II and select the correct answer usingthe code given below the lists :the code given below the lists :

List –I List –II

A. Top gate 1. Heavy and large castings

B. Bottom gate 2. Most widely used and economicalg y

C. Parting gate 3. Turbulence

C d

D. Step gate 4. Unfavourable temperature gradient

CodesA B C D A B C D

( ) (b)(a) 3 4 2 1 (b) 1 4 2 3(c) 3 2 4 1 (d) 1 2 4 3

IES‐1998A sand casting mouldA sand casting mouldassembly is shown inthe above figure. Thethe above figure. Theelements marked Aand B are respectivelyand B are respectively(a) Sprue and riser(b) I t d i(b) Ingate and riser(c) Drag and runner(d) Riser and runner

GATE‐2002The primary purpose of a sprue in a castingmould is toou d s to(a)Feed the casting at a rate consistent with the rateof solidificationof solidification

(b)Act as a reservoir for molten metal( ) d l l f h i b i h(c)Feed molten metal from the pouring basin to thegate

(d)Help feed the casting until all solidification takesplace

IES 1998IES‐1998Which of the following are the requirements of an ideal Which of the following are the requirements of an ideal gating system?

1 The molten metal should enter the mould cavity with as 1. The molten metal should enter the mould cavity with as high a velocity as possible.

2 It should facilitate complete filling of the mould cavity2. It should facilitate complete filling of the mould cavity.3. It should be able to prevent the absorption of air or gases

from the surroundings on the molten metal while from the surroundings on the molten metal while flowing through it.Select the correct answer using the codes given below:Select the correct answer using the codes given below:

(a) 1, 2 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1 and 3

IES‐2009C id th f ll i t t tConsider the following statements:1.The actual entry point through which the molten metal enters the mould cavity is called ingate.2.Bottom gate in case of a mould creates unfavourablegtemperature gradient.3.Sprue in case of a mould is made tapered to avoid air 3.Sprue in case of a mould is made tapered to avoid air inclusion.Which of the above statements is/are correct?Which of the above statements is/are correct?(a) 1 only (b) 1 and 2 (c) 2 and 3 (d) 1 and 3


GATE‐2001The height of the down‐sprue is 175 mm and its

ti l t th b i 2 Thcross‐sectional area at the base is 200 mm2. Thecross‐sectional area of the horizontal runner isl 2 A i l i di t thalso 200 mm2. Assuming no losses, indicate thecorrect choice for the time (in seconds) required tofill a mould ca it of olume 06 mm3 (Use g 0fill a mould cavity of volume 106 mm3. (Use g = 10m/s2).( ) (b) ( ) (d)(a)2.67 (b)8.45 (c)26.72 (d)84.50

GATE 2007GATE‐2007A 200 mm long down sprue has an area of crossg psection of 650 mm2 where the pouring basin meets thedown sprue (i.e. at the beginning of the down sprue).p ( g g p )A constant head of molten metal is maintained by thepouring basin. The Molten metal flow rate is 6.5 × 105p g 5mm3/s. Considering the end of down sprue to be opento atmosphere and an acceleration due to gravity ofp g y104mm/s2, the area of the down sprue in mm2 at its end(avoiding aspiration effect) should be( g p )(a)650.0 (b)350.0 (c)290.7 (d)190.0

Contd…

IES‐2003A ti ti f i d t d i th tiA gating ratio of 1: 2: 4 is used to design the gatingsystem for magnesium alloy casting. This gating ratiorefers to the cross∙ section areas of the various gatingrefers to the cross∙ section areas of the various gatingelements as given below:1 Down sprue 2 Runner bar 3 Ingates1. Down sprue 2. Runner bar 3. IngatesThe correct sequence of the above elements in theratio 1: 2: 4 isratio 1: 2: 4 is(a) 1, 2 and 3(b) d(b) 1,3 and 2(c) 2, 3 and 1(d) 3, 1 an 2

IES‐2005

The gating ratio 2: 8: 1 for copper in gating systemd i f t th ti f fdesign refers to the ratio of areas of:(a) Sprue: Runner: Ingate(b) Runner: Ingate: Sprue(c) Runner: Sprue: Ingate( ) p g(d) Ingate: Runner: Sprue

GATE‐2010

In a gating system, the ratio 1:2:4 represents

(a) Sprue base area: runner area: ingate area

(b) Pouring basin area : ingate area : runner area

(c) Sprue base area : ingate area : casting area

(d) R i i (d) Runner area : ingate area : casting area

IAS‐1999A i (A) Th f fl f l h hAssertion (A): The rate of flow of metal through sprueis NOT a function of the cross‐sectional areas ofsprue runner and gatesprue, runner and gate.Reason (R): If respective cross‐sectional areas ofsprue, runner and gate are in the ratio of 1: 2: 2, thep , g ,system is known as unpressurised gating system.(a) Both A and R are individually true and R is the correctyexplanation of A(b) Both A and R are individually true but R is not the

l i f Acorrect explanation of A(c) A is true but R is false(d) f l b(d) A is false but R is true

IES 1994IES‐1994Assertion (A): In a mould, a riser is designed and placedAssertion (A): In a mould, a riser is designed and placedso that the riser will solidify after the casting has solidified.Reason (R): A riser is a reservoir of molten metal whichReason (R): A riser is a reservoir of molten metal whichwill supply molten metal where a shrinkage cavity wouldhave occurred.(a) Both A and R are individually true and R is the correctexplanation of Ap(b) Both A and R are individually true but R is not thecorrect explanation of Ap(c) A is true but R is false(d) A is false but R is true(d) A is false but R is true

IES 2011The relationship between total freezing time tThe relationship between total freezing time t,volume of the casting V and its surface area A,according to Chvorinov’s rule is :g

( ) Va t kA

⎛ ⎞= ⎜ ⎟⎝ ⎠

( )

AAb t kV

⎜ ⎟⎝ ⎠⎛ ⎞= ⎜ ⎟⎝ ⎠

2

( )

V

Ac t kV

⎝ ⎠

⎛ ⎞= ⎜ ⎟⎝ ⎠

2

( )

V

Vd t kA

⎝ ⎠

⎛ ⎞= ⎜ ⎟⎝ ⎠Where K is a constant

A⎝ ⎠


IES‐1998A spherical drop of molten metal of radius 2 mm

was found to solidify in 10 seconds. A similar drop

of radius 4 mmwould solidify inof radius 4 mmwould solidify in

(a) 14.14 seconds

(b) 20 seconds

(c) 28.30 seconds

(d) 40 seconds

GATE 2013GATE‐2013A b h d ti lidifi i i ThA cube shaped casting solidifies in 5 min. The

solidification time in min for a cube of the same

material, which is 8 times heavier than the original

casting, will be

( ) (b) ( ) (d)(a) 10 (b) 20 (c) 24 (d) 40

GATE‐2003

With a solidification factor of 0.97 x 106 s/m2, the

solidification time (in seconds) for a spherical

casting of 200 mm diameter is

( ) (b) 8 ( ) (d)(a) 539 (b) 1078 (c) 4311 (d) 3233

IES‐2006According to Chvorinov's equation, the

lidifi ti ti f ti i ti l tsolidification time of a casting is proportional to:

(a) v2(a) v

(b) v

(c) 1/v

(d) 1/v2

Where, v = volume of casting

GATE – 2010 (PI)S lidifi ti ti f t lli ll ti iSolidification time of a metallic alloy casting is

(a) Directly proportional to its surface area(a) Directly proportional to its surface area

(b) Directly proportional to the specific heat of they p p p

cast material

(c) Directly proportional to the thermal diffusivity of

h l lthe molten metal

(d)Inversely proportional to the pouring(d)Inversely proportional to the pouring

temperature.

GATE‐2007

Volume of a cube of side 'l' and volume of a sphere of

radius ‘r’ are equal. Both the cube and the sphere are solid

d f t i l Th b i t Th ti f thand of same material. They are being cast. The ratio of the

solidification time of the cube to the same of the sphere is:p

( ) ( ) ( ) ( )3 6 2 2 3 2 44 r 4 r 4 r 4 ra b c d

6 l 6 l 6 l 6 lπ π π π⎛ ⎞ ⎛ ⎞ ⎛ ⎞⎛ ⎞ ⎛ ⎞ ⎛ ⎞ ⎛ ⎞ ⎛ ⎞

⎜ ⎟ ⎜ ⎟ ⎜ ⎟⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟ ⎜ ⎟⎝ ⎠ ⎝ ⎠ ⎝ ⎠⎝ ⎠ ⎝ ⎠ ⎝ ⎠ ⎝ ⎠ ⎝ ⎠6 l 6 l 6 l 6 l⎝ ⎠ ⎝ ⎠ ⎝ ⎠⎝ ⎠ ⎝ ⎠ ⎝ ⎠ ⎝ ⎠ ⎝ ⎠

GATE ‐2011 (PI)( )In a sand casting process, a sphere and a cylinderof equal volumes are separately cast from the sameof equal volumes are separately cast from the samemolten metal under identical conditions. Theheight and diameter of the cylinder are equal. Thee g t a d d a ete o t e cy de a e equa . eratio of the solidification time of the sphere to thatof the cylinder is(a) 1.14(b) 0.87( ) 7(c) 1.31(d) 0 76(d) 0.76

GATE‐2009 (PI)l d l d f d d h h l d l dA solid cylinder of diameter D and height equal to D, and a solid

cube of side L are being sand cast by using the same material.Assuming there is no superheat in both the cases, the ratio ofsolidification time of the cylinder to the solidification time of thecube is

(a) (L/D)2(a) (L/D)2

(b) (2L/D)2

(c) (2D/L)2

(d) (D/L)2(d) (D/L)


IES 2012IES ‐ 2012Th ti f f f l f it l f The ratio of surface area of volume for a unit volume of

riser is minimum in case of

(a) Cylindrical riser

(b) Spherical riser

(c) Hemispherical riser

(d) Cuboids riser

IES 2011 ConventionalIES 2011 ConventionalA round casting is 20 mm in diameter and 50 mm in

length. Another casting of the same metal is elliptical in

i i h j i i i f dcross section, with a major to minor axis ratio of 2, and

has the same length and cross‐sectional area as thehas the same length and cross sectional area as the

round casting. Both pieces are cast under the same

conditions. What is the difference in the solidification

i f h i ? [ M k ]times of the two castings ? [10 – Marks]

( ) ( )( )Area of ellipse

Ci f 3 3 3

ab

b b b

π=

⎡ ⎤( ) ( )( )

( )2 2

Circumference 3 3 3

2 / 2 (approx.)

a b a b a b

a b

π

π

⎡ ⎤= + − + +⎣ ⎦

= +

Conventional Question ESE 2003

Compare the solidification time of two optimum side –Compare the solidification time of two optimum side –

risers of the same volume with one has cylindrical shape

and other is parallopiped. [30 Marks]

Conventional Question IES‐2008QCalculate the size of a cylindrical riser (height and diameter

equal) necessary to feed a steel slab casting of dimensions

30 x 30 x 6 cm with a side riser casting poured horizontally30 x 30 x 6 cm with a side riser, casting poured horizontally

into the mould.

[Use Modulus Method]

[ 0 Marks][10 ‐Marks]

Conventional Question IES‐2007QCalculate the size of a cylindrical riser (height and

)diameter equal) necessary to feed a steel slab

casting of dimensions 25 x 25 x 5 cm with a sidecasting of dimensions 25 x 25 x 5 cm with a side

riser, casting poured horizontally into the mould.

[Use Caine’s Method]

[ For steel a = 0.10, b = 0.03 and c = 1.00 ]

IES‐1995

Directional solidification in castings can be

improved by using

(a) Chills and chaplets

( )(b) Chills and padding

(c) Chaplets and padding(c) Chaplets and padding

(d) Chills, chaplets and padding.(d) Chills, chaplets and padding.

GATE‐1998,2007

Chills are used in moulds to

(a) Achieve directional solidification

(b) Reduce the possibility of blowholes

(c) Reduce freezing time

(d) S h l fl f d i l(d) Smoothen metal flow for reducing splatter.

IAS 1994Chills are used in casting moulds to(a) Achieve directional solidification(b) Reduce possibility of blow holes(c) Reduce the freezing time(c) Reduce the freezing time(d) Increase the smoothness of cast surface

IES‐1997( ) l b l d h bl lAssertion (A): Steel can be melted in hot blast cupola.

Reason (R): In hot blast cupola, the flue gases are used topreheat the air blast to the cupola so that the temperature inthe furnace is considerably higher than that in a

i l lconventional cupola.(a) Both A and R are individually true and R is the correct

l i f Aexplanation of A(b) Both A and R are individually true but R is not the

l i f Acorrect explanation of A(c) A is true but R is false(d) A is false but R is trueFor 2014 (IES, GATE & PSUs) Page 7 of 17

IES 2012IES ‐ 2012Statement (I): Cupola furnace is not employed for( ) C p p ymelting steel in foundryStatement (II): The temperatures generated within a( ) p gcupola are not adequate for melting Steel(a) Both Statement (I) and Statement (II) are( ) ( ) ( )individually true and Statement (II) is the correctexplanation of Statement (I)(b) Both Statement (I) and Statement (II) areindividually true but Statement (II) is not the correctexplanation of Statement (I)(c) Statement (I) is true but Statement (II) is false(d) Statement (I) is false but Statement (II) is true

GATE‐1996

Light impurities in the molten metal are preventedf hi th ld it b idifrom reaching the mould cavity by providing a(a) Strainer(b) Button well(c) Skim bob( )(d) All of the above

GATE‐2005

A mould has a downsprue whose length is 20 cmd th ti l t th b f thand the cross sectional area at the base of the

downsprue is 1cm2. The downsprue feeds ah i t l l di i t th ld it fhorizontal runner leading into the mould cavity ofvolume 1000 cm3. The time required to fill themould ca it ill bemould cavity will be(a)4.05 s (b)5.05 s (c)6.05 s (d)7.25 s

GATE‐2012 (PI)A mould having dimensions 100 mm × 90 mm × 20 mm is filledA mould having dimensions 100 mm × 90 mm × 20 mm is filledwith molten metal through a gate as shown in the figure. Forheight h and cross‐sectional area A, the mould filling time is t1.g g 1The height is now quadrupled and the cross‐sectional area ishalved. The corresponding filling time is t2. The ratio t2/t1 is

1( )2

a2

( )1

( )

b

( ) 2( ) 2cd

GATE 2006GATE‐2006In a sand casting operation, the total liquid head is

i i d h h i i l h ldmaintained constant such that it is equal to the mouldheight. The time taken to fill the mould with a top gatei If h ld i fill d i h bis tA. If the same mould is filled with a bottom gate,then the time taken is tB. Ignore the time required tofill h d f i i l ff Afill the runner and frictional effects. Assumeatmospheric pressure at the top molten metal surfaces.Th l i b d iThe relation between tA and tB is(A) 2(B) 2

B At t=

(B) 2

(C)

B A

AB

t ttt

=

=( )2

(D) 2 2

B

B At t=

GATE 2007 (PI) Li k d S 1GATE – 2007 (PI) Linked S‐1In a sand casting process, a sprue of 10 mm baseIn a sand casting process, a sprue of 10 mm basediameter and 250 mm height leads to a runnerwhich fills a cubical mould cavity of 100 mm sizewhich fills a cubical mould cavity of 100 mm sizeThe volume flow rate (in mm3/s) is(a) 0.8 x 105 (b) 1.1 x 105

(c) 1 7 x 105 (d) 2 3 x 105(c) 1.7 x 105 (d) 2.3 x 105

GATE 2007 (PI) Li k d S 2GATE – 2007 (PI) Linked S‐2In a sand casting process, a sprue of 10 mm baseIn a sand casting process, a sprue of 10 mm basediameter and 250 mm height leads to a runnerwhich fills a cubical mould cavity of 100 mm sizewhich fills a cubical mould cavity of 100 mm sizeThe mould filling time (in seconds) is(a) 2.8 (b) 5.78(c) 7 54 (d) 8 41(c) 7.54 (d) 8.41

IES 20092 marks

IAS‐2011 MainSketch a mould for two hollow components to be

cast. On the diagram, indicate runner, gate, riser,

core, cope, sprue, pouring basin, sprue well, drag,

parting lineparting line.

[10‐Marks][ ]


GATE‐2004

Misrun is a casting defect which occurs due to

(a) Very high pouring temperature of the metal

(b) Insufficient fluidity of the molten metal

(c) Absorption of gases by the liquid metal

(d) I li f h ld fl k(d) Improper alignment of the mould flasks

GATE‐2009Two streams of liquid metal which are not hot

h t f l lt i t ti d f tenough to fuse properly result into a casting defect

known as

(a) Cold shut

(b) Swell

(c) Sand wash

(d) Scab

ld h fMold ShiftThe mold shift defect occurs when cope and drag

ldi b h t b l li dor molding boxes have not been properly aligned.

IES‐2001

Scab is a

(a) Sand casting defect

(b) Machining defect

(c) Welding defect

(d) F i d f (d) Forging defect

IAS‐2004Match List I (Casting Defects) with List II (Explanation) and select the correct Match List‐I (Casting Defects) with List‐II (Explanation) and select the correct answer using the codes given below the lists:List‐I List‐II(Casting Defects) (Explanation)(Casting Defects) (Explanation)A. Metallic projections 1. Consist of rounded or rough internal or exposed cavities

including blow holes and pin holesB. Cavities 2. Formed during melting, solidification and moulding.C. Inclusions 3. Includes single folds, laps, scars adhering sand layers and

oxide scaleD. Discontinuities 4. Include cracks, cold or hot tearing and cold shuts

Consist of fins flash or massi e projections and rough 5.Consist of fins, flash or massive projections and rough surfaces

Codes: A B C D A B C D(a) 1 5 3 2 (b) 1 5 2 4(a) 1 5 3 2 (b) 1 5 2 4(c) 5 1 2 4 (d) 5 1 3 2

GATE‐2003Hardness of green sand mould increases with(a) Increase in moisture content beyond 6 percenty p(b) Increase in permeability(c) Decrease in permeability(c) Decrease in permeability(d) Increase in both moisture content and

bilitpermeability

IES‐1998A i (A) S iff i b h b Assertion (A): Stiffening members, such as webs and ribs, used on a casting should be liberally provided provided. Reason (R): They will provide additional strength to a cast memberto a cast member.(a) Both A and R are individually true and R is the correct explanation of Acorrect explanation of A(b) Both A and R are individually true but R is not the correct explanation of A correct explanation of A (c) A is true but R is false(d) A i f l b t R i t(d) A is false but R is true

IES‐2005In gating system design, which one of thefollowing is the correct sequence in which chokearea, pouring time, pouring basin and sprue sizesare calculated?(a) Choke area ‐ Pouring time ‐ Pouring basin – Sprue(b) Pouring basin ‐ Sprue ‐ Choke area ‐ Pouring time(b) ou g bas Sp ue C o e a ea ou g t e(c) Choke area ‐ Sprue ‐ Pouring basin ‐ Pouring time(d) P i b i P i ti Ch k S(d) Pouring basin ‐ Pouring time ‐ Choke area ‐ Sprue

IES‐1997If the melting ratio of a cupola is 10: 1, then the coke requirement for one ton melt will be(a) 0.1 ton(b) 10 tons(b) 10 tons(c) 1 ton(d) t(d) 11 tons


IES‐2009In which one of the following furnaces most of the non‐ferrous alloys are melted?(a) Reverberatory furnace(b) Induction furnace(b) Induction furnace(c) Crucible furnace(d) P t f(d) Pot furnace

IAS‐2001Which of the following pattern‐materials are used in Precision Casting?1. Plaster of Paris2. Plastics2. Plastics3. Anodized Aluminium Alloy

F M4. Frozen MercurySelect the correct answer using the codes given below:(a) 1 and 2 (b) 2 and 4 (c)3 and 4 (d) 1 and 3

IAS‐2004Which one of the following gating systems is best suited to obtain directional solidification?(a) Top grating(b) Part‐line grating(b) Part line grating(c) Bottom grating(d) St d ti(d) Stepped grating

IES 2011In the designation of Aluminium casting A514 0In the designation of Aluminium casting A514.0indicates :( ) Al i i it(a) Aluminium purity(b) Aluminium content(c) Percentage of alloy element(d) Magnesium Content(d) Magnesium Content

A (d)Ans. (d)

Special CastingSpecial Casting

By S K MondalBy S K Mondal

IES 2010IES 2010Consider the following advantages of shell Consider the following advantages of shell mould casting: Cl di i l t l1. Close dimensional tolerance.

2. Good surface finish.3. Low cost. E i4. Easier.

Which of these are correct?(a) 1, 2 and 3 only (b) 2, 3 and 4 only( ) ( )(c) 1, 2 and 4 only (d) 1, 2, 3 and 4

IES‐1996Consider the following ingredients used inmoulding:

1. Dry silica sand2.Clay2.Clay3.Phenol formaldehydeS di ili t4.Sodium silicate

Those used for shell mould casting include(a) 1, 2 and 4 (b) 2, 3 and 4(c) 1and 3 (d) 1, 2, 3 and 4( ) 3 ( ) , , 3 4

IES‐2005I h ll ldi h th h ll thi k In shell moulding, how can the shell thickness be accurately maintained?

( )(a) By controlling the time during which the pattern is in contact with mould

(b) By controlling the time during which the pattern is heated

(c) By maintaining the temperature of the pattern in the range of 175oC – 380oCthe range of 175 C 380 C

(d) By the type of binder used


IES‐2006Shell moulding can be used for:(a) Producing milling cuttersg g(b) Making gold ornaments(c) Producing heavy and thick walled casting(c) Producing heavy and thick walled casting(d) Producing thin casting

IES 2007Which of the following are employed in shell

ldi ?moulding?1. Resin binder 2. Metal pattern 3. Heating coilsSelect the correct answer using the code givenbelow:(a) 1 and 2 only (b) 1 and 3 only(c) 2 and 3 only (d) 1 2 and 3(c) 2 and 3 only (d) 1, 2 and 3

IAS‐2007The mould in shell moulding process is made up

f hi h f th f ll i ?of which of the following?

(a) Gypsum + setting agents(a) Gypsum + setting agents

(b) Green sand + clayy

(c) Sodium silicate + dried sand

(d) Dried silica + phenolic resin

IAS‐1999M t h Li t I (M ldi P ) ith Li t II (Bi diMatch List I (Moulding Process) with List II (BindingAgent) and select the correct answer using the codesgiven below the lists:g

List I List IIA. Green sand 1. SilicateB. Core sand 2. OrganicC. Shell moulding 3. ClayD CO Pl f P iD. CO2 process 4. Plaster of Paris

5. PlasticCodes:A B C D A B C DCodes:A B C D A B C D(a) 3 2 5 1 (b) 3 2 4 1(c) 2 3 5 4 (d) 2 3 4 5(c) 2 3 5 4 (d) 2 3 4 5

IES 20092 marks

IES 2011The proper sequence of investment casting steps is :The proper sequence of investment casting steps is :(a) Slurry coating – pattern melt out‐Shakeout – Stucco

ticoating(b) Stucco coating – Slurry coating – Shakeout – Patternmelt out(c) Slurry coating – Stucco coating – Pattern melt out –y g gShakeout(d) Stucco coating – Shakeout – Slurry coating – Pattern(d) Stucco coating Shakeout Slurry coating Patternmelt out

GATE‐2006An expendable pattern is used in( ) l h(a) Slush casting(b) Squeeze casting(c) Centrifugal casting(d) Investment casting(d) Investment casting

GATE‐2011 (PI)

Which of the following casting processes uses

expendable pattern and expendable mould?

(a) Shell mould casting

( )(b) Investment casting

(c) Pressure die casting(c) Pressure die casting

(d) Centrifugal casting(d) Centrifugal casting

ISRO‐2010Investment casting is used for

(a) Shapes which are made by difficulty using complex

tt i d tipatterns in sand casting

(b) Mass productionp

(c) Shapes which are very complex and intricate and

can't be cast by any other method

(d) There is nothing like investment casting(d) There is nothing like investment castingFor 2014 (IES, GATE & PSUs) Page 11 of 17

IES‐1992The most preferred process for casting gas turbine blades is:(a) Die moulding(b) Shell moulding(b) Shell moulding(c) Investment moulding(d) S d ti(d) Sand casting

20 0JWM 2010Consider the following materials :g1. Wax 2 Wood2. Wood3. PlasticWhich of these materials can be used as pattern in investment casting process ?(a) 1, 2 and 3 (b) 1 and 2 only(c) 2 and 3 only (d) 1 and 3 only(c) 2 and 3 only (d) 1 and 3 only

IES 2010IES 2010Assertion (A): The investment casting is used for( ) gprecision parts such as turbine plates, sewingmachines etc.Reason (R): The investment castings have a goodsurface finish and are exact reproductions of thesurface finish and are exact reproductions of themaster pattern.(a) Both A and R are individually true and R is the(a) Both A and R are individually true and R is thecorrect explanation of A(b) B th A d R i di id ll t b t R i NOT th(b) Both A and R are individually true but R is NOT thecorrect explanation of A(c) A is true but R is false(d) A is false but R is true

IES 2007IES 2007Consider the following statements in respect ofinvestment castings:1. The pattern or patterns is/are not joined to a stalk orsprue also of wax to form a tree of patterns.2.The prepared moulds are placed in an oven and heatedgently to dry off the invest and melt out the bulk of wax.3.The moulds are usually poured by placing the moulds ina vacuum chamber. Which of the statements given aboveare correct?(a) 1 and 2 only (b) 1 and 3 only(c)2 and 3 only (d) 1, 2 and 33 y 3

IES‐2006Which of the following materials are used formaking patterns in investment casting method?1. Wax 2. Rubber 3. Wood 4. PlasticSelect the correct answer using the codes given below:Select the correct answer using the codes given below:(a) Only 1 and 3 (b) Only 2 and 3( ) O l d (d) O l d(c) Only 1, 2 and 4 (d) Only 2, 3 and 4

IAS‐1996Light and intricate parts with close dimensionaltolerances of the order of ± 0.005 mm areproduced by(a) Investment castingg(b) Die casting(c) Centrifugal casting(c) Centrifugal casting(d) Shell mould casting

IES 2013IES‐2013Statement (I): Mould walls of a permanent mould arekept thickkept thick.Statement (II): The thicker mould walls retain

i h i i fl f l lmaximum heat increasing flow of molten metal.(a) Both Statement (I) and Statement (II) are individuallytrue and Statement (II) is the correct explanation ofStatement (I)

(b) Both Statement (I) and Statement (II) are individuallytrue but Statement (II) is not the correct explanation of( ) pStatement (I)

(c) Statement (I) is true but Statement (II) is false(c) Statement (I) is true but Statement (II) is false(d) Statement (I) is false but Statement (II) is true

IES 2011Consider the following advantages of die casting overConsider the following advantages of die casting oversand casting :1 Rapidity of the process1. Rapidity of the process2. Smooth surface3 Strong dense metal structure3. Strong dense metal structureWhich of these advantages are correct ?( ) d(a) 1, 2 and 3(b) 1 and 2 only(c) 2 and 3 only(d) 1 and 3 only3 y

IES‐2009Which of the following are the most suitablematerials for die casting?(a) Zinc and its alloys(b) Copper and its alloys(b) Copper and its alloys(c) Aluminium and its alloys(d) L d d it ll(d) Lead and its alloys


20 0JWM 2010Assertion (A) : In die casting method, small( ) g ,thickness can be filled with liquid metal.Reason (R) : The air in die cavity trapped inside theReason (R) : The air in die cavity trapped inside thecasting causes problems.(a) Both A and R are individually true and R is the (a) Both A and R are individually true and R is the correct explanation of A(b) B h A d R i di id ll b R i h (b) Both A and R are individually true but R is not the correct explanation of A (c) A is true but R is false(d) A is false but R is true( )

IES‐2005Which one of the following processes produces acasting when pressure forces the molten metalinto themould cavity?(a) Shell moulding (b) Investment castingg g(c) Die casting (d) Continuous casting

IES‐2006In which of the following aremetal moulds used?(a) Greensand mould(b) Dry sand mould(c) Die casting process(c) Die casting process(d) Loam moulding

IES‐1995A i (A) A l i i ll i h % ili iAssertion (A): An aluminium alloy with 11 % silicon isused for making engine pistons by die castingtechniquetechnique.Reason (R): Aluminium has low density and additionof silicon improves its fluidity and therefore itsp ycastability.(a) Both A and R are individually true and R is the correctyexplanation of A(b) Both A and R are individually true but R is not the

l i f Acorrect explanation of A(c) A is true but R is false(d) f l b(d) A is false but R is true

IES‐1995Match List I with List II and select the correct answer taking the help Match List I with List II and select the correct answer taking the help of codes given below the lists:List I List II (Products) (Process of manufacture)(Products) (Process of manufacture)A. Automobile piston in aluminium alloy 1. Pressure die‐castingB. Engine crankshaft in spheroidal

hi i G i di igraphite iron 2. Gravity die‐castingC. Carburettor housing in aluminium alloy 3. Sand castingD. Cast titanium blades 4. Precision investment

icasting5. Shell moulding

Code: A B C D A B C D(a) 2 3 1 5 (b) 3 2 1 5(c) 2 1 3 4 (d) 4 1 2 3

IAS‐2007Consider the following statements:1. Zinc die castings have low strength.g g2. In the die casting process, very thin sections or complex shapes can be obtained easily.complex shapes can be obtained easily.Which of the statements given above is/are correct?( ) l(a) 1 only(b) 2 only(c) Both 1 and 2(d) Neither 1 nor 2( )

IAS‐1996A i (A) Di i i ld d f dAssertion (A): Die casting yields a product of goodaccuracy and finish.R (R) L l i ll d i diReason (R): Low melting alloys used in diecasting.( ) B h A d R i di id ll d R i h(a) Both A and R are individually true and R is thecorrect explanation of A(b) B h A d R i di id ll b R i h(b) Both A and R are individually true but R is not thecorrect explanation of A( ) A i b R i f l(c) A is true but R is false(d) A is false but R is true

IES 2011Consider the following statements :Consider the following statements :1. Hot chamber machine is used for casting zinc, tin andth l lti llother low melting alloys.

2. Cold chamber machine is used for die casting offerrous alloys3. Rapid cooling rate in die casting produces high3 p g g p gstrength and quality in many alloys.Which of these statements are correct?Which of these statements are correct?(a) 1, 2 and 3 (b) 1 and 2 only( ) d l (d) d l(c) 2 and 3 only (d) 1 and 3 only

GATE‐2007Which of the following engineering materials isth t it bl did t f h t h b dithe most suitable candidate for hot chamber diecasting?

( ) b l(a) Low carbon steel(b) Titanium(c) Copper(d) Tin(d) Tin


IES‐1995A i (A) Al i i ll i hAssertion (A): Aluminium alloys are cast in hotchamber die casting machine.Reason (R): Aluminium alloys require high meltingReason (R): Aluminium alloys require high meltingwhen compared to zinc alloys.(a) Both A and R are individually true and R is the correct(a) Both A and R are individually true and R is the correctexplanation of A(b) Both A and R are individually true but R is not the(b) Both A and R are individually true but R is not thecorrect explanation of A(c) A is true but R is false( )

(d) A is false but R is true

GATE ‐2009 (PI)( )Hot chamber die casting process is NOT suited for

(a) Lead and its alloy

(b) Zinc and its alloy

( ) Ti d it ll(c) Tin and its alloy

(d) Aluminum and its alloy( ) y

GATE‐2002In centrifugal casting, the impurities are

( ) f l d b d(a) Uniformly distributed(b) Forced towards the outer surface(c) Trapped near the mean radius of the casting(d) Collected at the centre of the casting(d) Collected at the centre of the casting

GATE‐1993Centrifugally cast products have(a) Large grain structure with high porosityg g g p y(b) Fine grain structure with high density(c) Fine grain structure with low density(c) Fine grain structure with low density(d) Segregation of slug towards the outer skin of the

ticasting

GATE ‐2008 (PI)( )In hollow cylindrical parts, made by centrifugal casting,

the density of the part is

( ) i h i(a) maximum at the outer region

(b) maximum at the inner region(b) maximum at the inner region

(c) maximum at the mid‐point between outer and inner( ) p

surfaces

(d) uniform throughout

IES‐2008Which of the following casting processes does notWhich of the following casting processes does not/do not require central core for producing pipe?1 Sand casting process1. Sand casting process2. Die casting process3 Centrifugal casting process3. Centrifugal casting processSelect the correct answer using the code given below:( ) d(a) 1 and 2(b) 2 only(c) 2 and 3(d) 3 only3 y

IES‐2009Which one of the following casting processes is

b t it d t k bi i h llbest suited to make bigger size hollow

symmetrical pipes?y p p

(a) Die casting

(b) Investment casting

(c) Shell moulding

(d) Centrifugal casting

IES 2007Which one of the following is the correctstatement?In a centrifugal casting method(a) No core is used(a) No core is used(b) Core may be made of any metal( ) C i d f d(c) Core is made of sand(d) Core is made of ferrous metal

IES‐1998Poor machinability of centrifugally cast iron pipe is due to(a) Chilling(b) Segregation(b) Segregation(c) Dense structure(d) Hi h ld t ti d(d) High mould rotation speed


IES‐2009Which of the following are the most likelycharacteristics in centrifugal casting?(a) Fine grain size and high porosity(b) Coarse grain size and high porosity(b) Coarse grain size and high porosity(c) Fine grain size and high density(d) C i i d hi h d it(d) Coarse grain size and high density

IES 2007Match List I with List II and select the correct answer using the code given Match List I with List II and select the correct answer using the code given below the Lists:List I List II(Casting Process) (Principle)(Casting Process) (Principle)A. Die casting 1.The metal solidifies in a rotating mouldB. Investment casting 2.The pattern cluster is repeatedly dipped

into a ceramic slurry and dusted with frefractory

C. Shell moulding 3. Molten metal is forced by pressure into a metallic mould

D Centrifugal casting 4 After cooling the invest is removed D. Centrifugal casting 4. After cooling, the invest is removed from the Casting by pressure jetting or vibratory cleaning

Code:A B C D A B C D(a) 2 1 3 4 (b) 3 4 2 1(c) 2 4 3 1 (c) 3 1 2 4

IES‐2000M t h Li t I (P ) ith Li t II (P d t / t i l ) Match List I (Process) with List II (Products/materials) and select the correct answer using the codes given below the Lists:List I List IIA. Die casting 1. Phenol formaldehydeB. Shell molding 2. C.I. pipesC. CO2 molding 3. Non‐ferrous alloysD C if l i S di iliD. Centrifugal casting 4. Sodium silicate

Codes:A B C D A B C D(a) 1 3 4 2 (b) 3 1 4 2(a) 1 3 4 2 (b) 3 1 4 2(c) 3 1 2 4 (d) 1 3 2 4

IAS‐2004Match List‐I (Name of the Process) with List‐II (Advantage) and select the correct answer using the codes given below the lists:List I List IIList‐I List‐II(Name of the Process) (Advantage)A. Sand Casting 1. Large cylindrical parts with good qualityB C i ld ti E ll t di i l d fB. Ceramic mold casting 2.Excellent dimensional accuracy and surface

finishC. Die casting 3. Intricate shapes and close tolerance partsD C if l i Al l i d h if li i D. Centrifugal casting 4. Almost any metal is cast and there if no limit to

size, shape and weight5. Good dimensional accuracy, finish and lowporosity

Codes:A B C D A B C D(a) 2 3 5 1 (b) 4 1 2 3

(c) 2 1 5 3 (d) 4 3 2 1

IAS‐2003A i (A) S i if l i iAssertion (A): Semi‐centrifugal casting process issimilar to true centrifugal casting except that thecentral core is used in it to form inner surfacecentral core is used in it to form inner surface.Reason (R): In semi‐centrifugal casting process theaxis of spin is always verticalp y(a) Both A and R are individually true and R is the correctexplanation of Ap(b) Both A and R are individually true but R is not thecorrect explanation of A(c) A is true but R is false(d) A is false but R is true

IES‐2013Statement (I): In semi centrifugal casting a particularshape of the casting is produced by mould, core and thep g p ycentrifugal force of molten metal.Statement (II): The centrifugal force aids to properStatement (II): The centrifugal force aids to properfeeding to produce the casting free from porosity.

(a) Both Statement (I) and Statement (II) are individually(a) Both Statement (I) and Statement (II) are individuallytrue and Statement (II) is the correct explanation ofStatement (I)Statement (I)

(b) Both Statement (I) and Statement (II) are individuallyt b t St t t (II) i t th t l ti ftrue but Statement (II) is not the correct explanation ofStatement (I)

( ) ( ) b ( ) f l(c) Statement (I) is true but Statement (II) is false(d) Statement (I) is false but Statement (II) is true

IES‐2000M t h Li t I (T f ti ) ith Li t II (W ki i i l ) Match List I (Type of casting) with List II (Working principles) and select the correct answer using the codes given below the Lists:Li t I Li t IIList I List IIA. Die casting 1. Molten metal is forced into the die

under pressureB. Centrifugal casting 2. Axis of rotation does not coincide with

axis of mouldC. Centrifuging 3. Metal solidifies when mould is rotatingg g 3 gD. Continuous casting 4. Continuously pouring molten metal

into mouldCodes:A B C D A B C DCodes:A B C D A B C D

(a) 1 3 2 4 (b) 4 3 2 1(c) 1 2 3 4 (d) 4 2 3 1

IAS‐2004Which of the following are produced by slushcasting?(a) Hollow castings with thick walls(b) Hollow castings with thin walls(b) Hollow castings with thin walls(c) Thin castings(d) Thi k ti(d) Thick castings

IES 2011The method of casting for producing ornamental piecesThe method of casting for producing ornamental piecesare:( ) Sl h d it ti(a) Slush and gravity casting(b) Pressed and slush casting(c) Gravity and semi permanent mould casting(d) Semi permanent mould and pressed casting(d) Semi permanent mould and pressed casting


IES 2012IES ‐ 2012The process of making hollow castings of non‐circularThe process of making hollow castings of non circularshape and desired thickness by permanent mouldwithout the use of cores is known aswithout the use of cores is known as(a) Die casting (b) Slush casting( ) P d ti (d) C t if l ti(c) Pressed casting (d) Centrifugal casting

IAS‐2002M t h Li t I (C ti P ) ith Li t II Match List I (Casting Process) with List II (Applications) and select the correct answer using the codes given below the Lists:gList I List II(Casting Process) (Applications)A. Centrifugal casting 1. CarburetorB. Squeeze casting 2. PipesC Di C i Wh l f C. Die Casting 3. Wheels for

automobiles4 Gear housings4. Gear housings

Codes: A B C A B C(a) 2 3 1 (b) 4 1 3(a) 2 3 1 (b) 4 1 3(c) 2 1 3 (d) 4 3 1

IES 2009IES 2009

2 marks

IES‐1996Which of the following pairs are correctly matched?1. Pit moulding ..................For large jobs.g g j2. Investment moulding ... Lost wax process.3 Plaster moulding Mould prepared in 3. Plaster moulding ……… Mould prepared in

gypsum.( ) d (b) d (a) 1, 2 and 3 (b) 1 and 2(c) 1 and 3 (d) 2 and 3

IES‐1997Which one of the following pairs is not correctlymatched?(a) Aluminium alloy piston …………Pressure die casting(b) Jewellery……………………….. Lost wax process(b) Jewellery……………………….. Lost wax process(c) Large pipes ……………………..Centrifugal casting(d) L b ll L ldi(d) Large bells ………………………Loam moulding

GATE‐1998Li t I Li t II List I List II (A) Sand casting (1) Symmetrical and circular shapes onlycircular shapes only(B) Plaster mould casting (2) Parts have hardened skins and soft interior(C) Shell mould casting (3) Minimum post‐casting processing(D) Investment casting (4) Parts have a tendency (D) Investment casting (4) Parts have a tendency

to warp(5) Parts have soft skin (5)

and hard interior(6) Suitable only for non‐

f t lferrous metals

GATE‐1992M h h f ll i ldi / i i h Match the following moulding/casting processes with the product:Moulding/Casting processes ProductMoulding/Casting processes Product(A) Slush casting (P) Turbine blade(B) Shell moulding (Q) Machine tool bed(B) Shell moulding (Q) Machine tool bed(C) Dry sand moulding (R) Cylinder block(D) C t if l ti (S) H ll ti (D) Centrifugal casting (S) Hollow castings

like lamp shades(T) Rain water pipe(T) Rain water pipe(U) Cast iron shoe brakebrake

GATE‐1996List I List II(A) Rivets for aircraft body 1. Forgingy g g(B) Carburettor body 2. Cold heading(C) Crankshafts 3 Aluminium‐based (C) Crankshafts 3. Aluminium‐based

alloy(D) N il P di ti(D) Nails 4. Pressure die casting

5. Investment casting

IES‐2003M t h Li t I (P d t ) ith Li t II (C ti P ) d l t Match List I (Products) with List II (Casting Process) and select the correct answer using the codes given below the Lists:List I List II(Products) (Casting Process)A. Hollow statues 1. Centrifugal CastingB Dentures 2 Investment CastingB. Dentures 2. Investment CastingC. Aluminium alloy pistons 3. Slush CastingD. Rocker arms 4. Shell Moulding

G i Di C i5. Gravity Die CastingCodes:A B C D A B C D

(a) 3 2 4 5 (b) 1 3 4 5( ) 3 4 5 ( ) 3 4 5(c) 1 2 3 4 (d) 3 2 5 4


IES‐1993M h h i f Li I (E i ) i h h i Match the items of List I (Equipment) with the items of List II (Process) and select the correct answer using the given codesthe given codes.List I (Equipment) List II (Process)P ‐ Hot Chamber Machine 1 CleaningP ‐ Hot Chamber Machine 1. CleaningQ ‐Muller 2. Core makingR ‐ Dielectric Baker 3 Die castingR ‐ Dielectric Baker 3. Die castingS ‐ Sand Blaster 4. Annealing

5 Sand mixing5. Sand mixing(a) P‐2, Q‐1, R‐4, S‐5 (b) P‐4, Q‐2, R‐3, S‐5(c) P 4 Q 5 R 1 S 2 (d) P 3 Q 5 R 2 S 1(c) P‐4, Q‐5, R‐1, S‐2 (d) P‐3, Q‐5, R‐2, S‐1

IAS‐2004M h Li I (N f h C i P ) i h Li II (P D fi i i ) d l Match List‐I (Name of the Casting Process) with List‐II (Process Definition) and select the correct answer using the codes given below the lists:List‐I List‐II (Name of the Castin Process) (Process Definition)(Name of the Casting Process) (Process Definition)A. Die casting 1.This process involves use of a mould made of

Dried silica sand and phenolic resin mixtureB El t l ti I thi lt t l i f d bB. Electroslag casting 2. In this process, molten metal is forced by

Pressure into a metal mouldC. Centrifugal casting 3. This process employs a consumable electrodeD P i i i Thi i l i ld hil h D. Precision casting 4. This process involves rotating a mould while the

metal solidifies5. This process produces very smooth, highlyAccurate castings from both ferrous and nonferrous alloys

Codes:A B C D A B C D(a) 5 4 1 2 (b) 2 3 4 5(c) 5 3 4 2 (d) 2 4 1 5

GATE 2007 (PI)GATE – 2007 (PI)Match the lists

Group‐1 Group‐2P. Sand Casting 1. Turbine bladesQ Centrifugal Casting 2 IC Engine PistonsQ. Centrifugal Casting 2. IC Engine PistonsR. Investment Casting 3. Large bellsS. Die Casting 4. Pulleys

(a) P – 4, Q – 1, R – 3, S – 2 (b) P – 2, Q – 4, R – 3, S ‐ 1(c) P – 3, Q – 4, R – 1, S – 2 (d) P – 3, Q – 2, R – 1, S ‐ 4( ) 3, Q 4, , ( ) 3, Q , , 4

Q. No Option Q. No OptionConventional Casting Process Ch‐21Q. No Option1 A2 A

p

13 C14 D2 A

3 C14 D15 D

4 A5 D

16 B17 B

6 A7 D

18 B19 D

8 C9 B

20 A21 A9 B

10 D11 A

21 A

11 A12 B

Special Casting Process Ch‐22

Q. No Option Q. No Option1 D2 C

11 A12 A

3 C4 B

12 A13 D14 A

5 C6 A

14 A15 A

6 A7 D

16 B17 A

8 C9 B10 D


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Casting Question Set-2014