Deck 2: Casting and Foundry Techniques

Question 1

Which of the following metal has a melting point of about 420oC and latent heat of fusion 26.3 cal/g?

A)nickel
B)copper
C)zinc
D)iron

Answer 1

zinc

Question 2

Which of the following metal has a melting point of about 660oC and latent heat of fusion 92.7 cal/g?

A)aluminium
B)lead
C)magnesium
D)tin

Answer 2

aluminium

Question 3

Gas-Fired burner is used in which of the following furnace?

A)induction furnace
B)reverberatory furnace
C)cupola furnace
D)crucible furnace

Answer 3

reverberatory furnace

Question 4

What is inoculation of cast iron?

A)addition of sulphur alloys
B)addition of silicon alloys
C)addition of oxides
D)addition of parent metal's ore

Question 5

Why is inoculation done certain times during melting of cast iron?

A)to enhance its mechanical properties
B)to reduce the liquid shrinkage of metal
C)to enhance the surface finishing
D)all of the mentioned

Question 6

Which of the following is/are not used to melt material in casting(foundry) industries?

A)cupola furnace
B)induction furnace
C)ladle furnace
D)crucible furnace

Question 7

Which type of sand is used in shell moulding?

A)black sand
B)wet and fine sand
C)dry and fine sand
D)any of the sand

Question 8

Which is the most widely used resin in shell moulding?

A)phenol formaldehyde
B)ethanol formaldehyde
C)phenol
D)ethanol

Question 9

Which of the following statement is true?

A)the size of the casting can be adjustable
B)the size of the casting is not limited
C)the size of the casting obtained by shell moulding is limited
D)none of the mentioned

Question 10

Cylinder and cylinder heads for air cooled IC engines are casted using which technique?

A)precision investment casting
B)shell moulding
C)permanent mould casting
D)die casting

Question 11

In precision investment casting, to make the mould the prepared pattern is dipped into a slurry. From which material is this slurry is made up of?

A)ethyl silicate
B)sodium silicate
C)both ethyl and sodium silicate
D)neither ethyl nor sodium silicate

Question 12

Another name of Gravity Die Casting is?

A)centrifugal casting
B)permanent mould casting
C)precision investment casting
D)hot chamber process

Question 13

In PIC, any wax remnants are dissolved with the help of hot vapors of a solvent. Which solvent is used for this purpose?

A)ethanol
B)chlorofluorocarbon
C)trichloroethylene
D)any of the above

Question 14

Which of the following is a limitation of die casting, but is overcome in vacuum die casting?

A)the air left in the cavity when the die is closed
B)the moisture left in the cavity when the die is closed
C)the air left in the cavity when the die is open
D)the moisture left in the cavity when the die is open

Question 15

Pattern used in shell moulding is normally made up of?

A)wax
B)metal
C)wood
D)plastic

Question 16

The casting process that does not require a core to produce a hollow casting is?

A)shell moulding
B)hot-chamber die casting
C)permanent mould casting
D)true centrifugal casting

Question 17

Squeeze casting method was developed in which country?

A)japan
B)india
C)america
D)russia

Question 18

The tundish is a_______________

A)pouring vessel
B)riser
C)type of core
D)machine name

Question 19

Which of the type of centrifugal casting methods is used to produce 'non- symmetrical' shaped castings?

A)true centrifugal casting
B)semi centrifugal casting
C)centrifuging
D)non centrifugal casting

Question 20

True centrifugal casting method is usually used to make_______________      

A)bent pipes
B)hollow pipes
C)bolts
D)nuts

Question 21

Which of the following forces provides continuous pressure on the metal in centrifugal casting?

A)spring force
B)centrifugal force
C)gravitational force
D)frictional force

Question 22

Which of the following methods of casting is best suited for casting of hollow pipes and tubes?

A)investment casting
B)permanent mould casting
C)die casting
D)centrifugal casting

Question 23

The axis of rotation of the mould should be horizontal for the casting of long pipes in centrifugal casting.

Question 24

In centrifugal casting, only sand moulds can be used due to the problem of sticking of metal.