3.2 special casting q&a for students

7/27/2019 3.2 Special Casting Q&A for Students

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By SKMondalCompiledBy:SKMondal MadeEasy

IES2010Considerthefollowingadvantagesofshellmouldcasting:

1.Closedimensionaltolerance.

2.Goodsurfacefinish.

3.Lowcost.

4.Easier.

Whichofthesearecorrect?

(a)1,2and3only (b)2,3and4only

(c)1,2and4only (d)1,2,3and4 [Ans.C]CompiledBy:SKMondal MadeEasy

IES1996

Consider the following ingredients used inmoulding:

1. Dry silica sand

2.Clay

3.Phenol formaldehyde

4.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

Ans. (c)CompiledBy:SKMondal MadeEasy

IES2005Inshellmoulding,howcantheshellthicknessbeaccuratelymaintained?

(a)Bycontrollingthetimeduringwhichthepatternisincontactwithmould

(b)Bycontrollingthetimeduringwhichthepatternisheated

(c)Bymaintainingthetemperatureofthepatternintherangeof175oC 380oC

(d)Bythetypeofbinderused

Ans.(a)

CompiledBy:SKMondal MadeEasy

IES2006

Shellmouldingcanbeusedfor:

(a) Producingmillingcutters

(b) Makinggoldornaments

(d) Producingthincasting

Ans.(d)


IES2007

Which of the following are employed in shellmoulding?

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

Ans. (d)



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IAS2007

The mould in shell moulding process is made up

of which of the following?

(b) Green sand + clay

(c) Sodium silicate + dried sand

(d) Dried silica + phenolic resin

Ans. (d)CompiledBy:SKMondal MadeEasy

IAS1999

Match List I (Moulding Process) with List II (BindingAgent) and select the correct answer using the codes

given below the lists:List I List II

A. Green sand 1. SilicateB. Core s and 2. OrganicC. Shell moulding 3. ClayD. CO2 process 4. Plaster of Paris

5. PlasticCodes: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

Ans. (a)CompiledBy:SKMondal MadeEasy

IES2011The proper sequence of investment casting steps is :

(a) Slurry coating pattern melt outShakeout Stuccocoating

(b) Stucco coating Slurry coating Shakeout Pattern

(c) Slurry coating Stucco coating Pattern melt out Shakeout

(d) Stucco coating Shakeout Slurry coating Patternmelt out


GATE2006

An expendable pattern is used in

(a) Slush casting

(b) Squeeze casting

(c) Centrifugal casting

(d) Investment casting

Ans. (d)


IES1992

Themostpreferredprocessforcastinggasturbinebladesis:

(a) Diemoulding

b Shellmouldin

(c) Investmentmoulding

(d) Sandcasting

Ans.(c)


JWM2010Considerthefollowingmaterials:

1.Wax

2.Wood

3.

PlasticWhichofthesematerialscanbeusedaspatternininvestmentcastingprocess?

(a)1,2and3 (b)1and2only

(c)2and3only (d)1and3only

Ans.(d)



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IES2010Assertion (A): These investment casting is used forprecision parts such as turbine plates, sewing

machines etc.Reason (R): The investment castings have a goodsurface finish and are exact re roductions of themaster pattern.

(a) Both A and R are individually true and R is thecorrect explanation of A

(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 [Ans. (a)CompiledBy:SKMondal MadeEasy

IES2007

Consider the following statements in respect ofinvestmentcastings:

1. The pattern or patterns is/are not joined to a stalk orsprue alsoof wax to form a treeof 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 3


IES2006

Which of the following materials are used formaking patterns in investment casting method?

1. Wax 2. Rubber 3. Wood 4. Plastic

Select thecorrectanswer usin th codes iven below:

(a) Only 1 and 3 (b) Only 2 and 3

(c) Only 1, 2 and 4 (d) Only 2, 3 and 4

Ans. (c)


IAS1996

Light and intricate parts with close dimensionaltolerances of the order of 0.005 mm areproduced by

(a) Investment castin

(b) Die casting

(c) Centrifugal casting

(d) Shell mould casting

Ans. (a)


IES2011Consider the following advantages of die casting oversand casting :

1. Rapidity of the process

2. Smooth surface

3. rong ense me a s ruc ure

Which of these advantages are correct ?

(a) 1, 2 and 3

(b) 1 and 2 only

(c) 2 and 3 only

(d) 1 and 3 only [Ans. (b)]


IES2009

Which of the following are the most suitablematerials fordie casting?

(a) Zinc and its alloys

b Co er and its allo s(c) Aluminium and its alloys

(d) Lead and its alloys

Ans. (d)



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JWM2010Assertion (A) : In die casting method, smallthickness can be filled with liquid metal.

Reason (R) : The air in die cavity trapped inside thecasting causes problems.

correctexplanationofA

(b) BothAandRareindividuallytruebutRisnot thecorrectexplanationofA

(c) AistruebutRisfalse

(d) AisfalsebutRistrue

Ans.(b)CompiledBy:SKMondal MadeEasy

IES2005

Which one of the following processes produces a

casting when pressure forces the molten metalinto the mould cavity?

(a) Shell mouldin (b) Investment casting

(c) Die c asting (d) Continuous c asting

Ans. (c)


IES2006

In which of the following are metal moulds used?

(a) Greensand mould

(b) Dry sand mould

(d) Loam moulding

Ans. (c)


IES1995

Assertion (A): An aluminium alloy with 11 % silicon isused for making engine pistons by die castingtechnique.Reason (R): Aluminium has low density and additionof silicon improves its fluidity and therefore its

.(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 thecorrect explanation of A(c) A is true but R is false(d) A is false but R is true


IES1995

MatchListIwithListIIandselectthecorrectanswertakingthehelpofcodesgivenbelowthelists:ListI ListII(Products) (Processofmanufacture)A. Automobilepistoninaluminiumalloy 1.Pressurediecasting

B. Enginecrankshaft

in

spheroidal

grap te ron 2.Grav ty ecast ngC. Carburettor housinginaluminiumalloy 3.SandcastingD. Ca sttitaniumblades 4.Precisioninvestment

casting5.Shellmoulding

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

Ans.(a)


IAS2007

Considerthefollowingstatements:

1. Zincdiecastingshavelowstrength.

2. Inthediecastingprocess,verythinsectionsor

com lexsha es

can

be

obtained

easil .

Whichofthestatementsgivenaboveis/arecorrect?

(a) 1only

(b) 2only

(c) Both1and2

(d) Neither1nor2

Ans.(b)CompiledBy:SKMondal MadeEasy


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IAS1996

Assertion (A): Die casting yields a product of goodaccuracy and finish.

Reason (R): Low melting alloys used indie casting.

(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 thecorrect explanation of A


(d) A is false but R is true

Ans. (b)CompiledBy:SKMondal MadeEasy

IES2011Consider the following statements :

1. Hot chamber machine is used for casting zinc, tin and

other low melting alloys.2. Cold chamber machine is used for die casting of ferrousalloys

3. Rapid cooling rate in die casting produces high strengthand quality in many alloys.

Which of these statements are correct?

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

(c) 2 and 3 only (d) 1 and 3 only

Ans. (d)


GATE2007

Which of the following engineering materials isthe most suitable candidate for hot chamber diecasting?

(b) Titanium

(c) Copper

(d) Tin

Ans. (d)


IES1995

Assertion (A): Aluminium alloys are cast in hotchamber die casting machine.

Reason (R): Aluminium alloys require highmelting when compared to zinc alloys.

a ot an are n v ua y true an s t ecorrect explanation of A





GATE2002

In centrifugal casting, the impurities are

(a) Uniformly distributed

(b) Forced towards the outer surface(c) Trapped near the mean radiusof the casting

(d) Collected at the centre of the casting

Ans. (d)


GATE1993

Centrifugally cast products have

(a) Large grain structure with high porosity

(b) Fine grain structure with high density

(d) Segregation of slug towards the outer skin of thecasting

Ans. (b)



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IES2008

Which of the following casting processes does not/do not require central core forproducing pipe?

1. Sand casting process2. Diecasting process

.

Select the correct answer using the code given below:

(a) 1 and 2

(b) 2 only

(c) 2 and 3

(d) 3 only


IES2009

Which one of the following casting processes is

best suited to make bigger size hollow

s mmetrical i es?

(a) Die casting

(b) Investment casting

(c) Shell moulding

(d) Centrifugal casting [Ans. (d)]CompiledBy:SKMondal MadeEasy

IES2007

Which one of the following is the correctstatement?

In a centrifugal casting method

a Nocore is used

(b) Core may be made of any metal

(c) Core is made of sand

(d) Core is made of ferrous metal


IES1998

Poormachinability ofcentrifugallycastironpipeisdueto

(a) Chilling

b Se re ation

(c) Densestructure

(d) Highmouldrotationspeed

Ans.(c)


IES2009

Which of the following are the most likelycharacteristics in centrifugal casting?

(a) Fine grain size and high porosity

b Coarse rain sizeand hi h orosit(c) Fine grain size and high density

(d) Coarse grain size and high density

Ans. (c)


IES2007

MatchListIwithListIIandselectthecorrectanswerusingthecodegivenbelowtheLists:ListI ListII(CastingProcess) (Principle)A. Diecasting 1.ThemetalsolidifiesinarotatingmouldB. Investmentcasting 2.Thepatternclusterisrepeatedlydipped

intoaceramic

slurry

and

dusted

with

re ractoryC. S hel lmoulding 3.Moltenmetalisforcedbypressureinto

ametallicmouldD. Centrifugalcasting 4.Aftercooling,theinvestisremoved

fromthe Castingbypressurejettingorvibratorycleaning

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

Ans.(b)



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IES2000

MatchListI(Process)withListII(Products/materials)andselectthecorrectanswerusingthecodesgivenbelowthe

Lists:ListI ListIIA. Diecasting 1.Phenolformaldehyde

. . . .C. CO2 molding 3.NonferrousalloysD. Centrifugalcasting 4.Sodiumsilicate

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

Ans.(b)


IAS2004

MatchListI(NameoftheProcess)withListII(Advantage)andselectthecorrectanswerusingthecodesgivenbelowthelists:

ListI List

II

(NameoftheP rocess) (Adva ntage )

A. SandCasting 1.Largecylindricalpartswithgoodquality

B . C er am icmoldc as ting 2 .E xc el lentdimensionalaccuracyandsurface

finish

C. Diecasting 3.Intricateshapesandclosetoleranceparts

D. Centrifugalcasting 4.Almostanymetaliscastandthereifnolimitto

size,shapeandweight

5.Gooddimensionalaccuracy,finishandlow

porosity

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

Ans.(d)


IAS2003

Assertion (A): Semicentrifugal casting process issimilar to true centrifugal casting except that thecentral core is used in it to form innersurface.

Reason (R): In semicentrifugal casting process theaxis of s in is alwa s vertical

(a) Both A and R are individually true and R is the correctexplanation of A





IES2000

MatchListI(Typeofcasting)withListII(Workingprinciples)andselectthecorrectanswerusingthecodesgivenbelowtheLists:ListI ListIIA. Diecasting 1.Moltenmetalisforcedintothedie

underpressureB. Centrifugalcasting 2.Axisofrotationdoesnotcoincidewith

axisofmouldC. Centrifuging 3.MetalsolidifieswhenmouldisrotatingD. Continuouscasting 4.Continuouslypouringmoltenmetal

intomouldCodes: 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

Ans.(a)


IAS2004

Which of the following are produced by slushcasting?

(a) Hollow castings with thick walls

b Hollow castin s with thin walls(c) Thin castings

(d) Thick castings

Ans. (b)


IES2011The method of casting for producing ornamental piecesare:

(a) Slush and gravity casting

(b) Pressed and slush casting(c) Gravity and semi permanent mould casting

(d) Semi permanent mould and pressed casting

Ans. (a)



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IAS2002

MatchListI(CastingProcess)withListII(Applications)andselectthecorrectanswerusingthe

codesgiven

below

the

Lists:

ListI ListII(CastingProcess) (Applications)

A. Centrifugalcasting 1. CarburetorB. Squeezecasting 2. PipesC. DieCasting 3. Wheelsfor

automobiles4. Gearhousings

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


IES1996

Whichofthefollowingpairsarecorrectlymatched?

1. Pitmoulding ..................For

large

jobs.

2. Investmentmoulding ...Lostwaxprocess.

. gypsum.

(a) 1,2and3 (b) 1and2

(c) 1and3 (d) 2and3

Ans.(a)


IES1997

Which one of the following pairs is not correctlymatched?

(a) Aluminium alloy piston Pressure die casting

b eweller .. Lost wax rocess

(c) Large pipes ..Centrifugal casting

(d) Large bells Loam moulding

Ans. (a)


GATE1998

ListI ListII(A) Sandcasting (1) Symmetricalandcircularshapesonly(B) Plastermouldcasting (2) Partshavehardenedskinsandsoftinterior

processing(D) Investmentcasting (4) Partshaveatendency

towarp(5) Partshavesoftskin

andhardinterior(6) Suitableonlyfornon

ferrousmetals

Ans.(A)

4,

(B)

6,

(C)

2,

(D)

3


GATE1992

Matchthefollowingmoulding/castingprocesseswiththeproduct:

Moulding/Castingprocesses Product

(A) Slushcasting (P)Turbineblade

e mou ng ac ne oo e

(C) Drysandmoulding (R)Cylinderblock

(D) Centrifugalcasting (S)Hollowcastingslikelampshades

(T)Rainwaterpipe

(U)Castironshoebrake

Ans.A S,B P,C R,D TCompiledBy:SKMondal MadeEasy

GATE1996

ListI ListII

(A) Rivetsforaircraftbody 1. Forging

(B) Carburettor body 2. Coldheading

.

alloy

(D) Nails 4. Pressurediecasting

5. Investmentcasting

Ans.(A) 3,(B) 4,(C) 1,(D) 2



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IES2003

MatchListI(Products)withListII(CastingProcess)andselectthecorrectanswerusingthecodesgivenbelowtheLists:

ListI List

II(Products) (CastingProcess)

A. Hollowstatues 1. CentrifugalCastingB Dentures 2 InvestmentCastin. . C. Aluminiumalloypistons 3. SlushCastingD. Rockerarms 4. ShellMoulding

5. Gravity DieCastingCodes:A B C D A B C D

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

Ans.(d)


IES1993

MatchtheitemsofListI(Equipment)withtheitemsofListII(Process)andselectthecorrectanswerusing

thegiven

codes.

ListI(Equipment) ListII(Process)

.

Q Muller 2. Coremaking

R DielectricBaker 3. Diecasting

S SandBlaster 4. Annealing

5. Sandmixing

(a) P2,Q1,R4,S5 (b) P4,Q2,R3,S5

(c) P4,Q5,R1,S2 (d) P3,Q5,R2,S1

Ans.(d)CompiledBy:SKMondal MadeEasy

IAS2004

MatchListI(NameoftheCastingProcess)withListII(ProcessDefinition)andselectthecorrectanswerusingthecodesgivenbelowthelists:

ListI ListII

(NameoftheCastingProcess) (ProcessDefinition)

A. Diecasting 1.Thisprocessinvolvesuseofamouldmadeof

Driedsilicasandandphenolic resinmixture

B. Electroslag casting 2.Inthisprocess,moltenmetalisforcedby

Pressureintoametalmould

C. Centrifugalcasting 3.Thisprocessemploysaconsumableelectrode

D. Precisioncasting 4.Thisprocessinvolvesrotatingamouldwhilethe

metalsolidifies

5.Thisprocessproducesverysmooth,highly

Accuratecastingsfrombothferrousandnon

ferrousalloys

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

5Ans.(b)

CompiledBy:SKMondal MadeEasy CompiledBy:SKMondal MadeEasy

3.2 special casting q&a for students

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