Question 1

Which of the following defect may occur due to improper design of gating system?

Accepted Answer

A)  Cold shuts
B)  Rough surfaces
C)  Misruns
D)  any of the above D

Question 2

Which of the following process uses organic binder?

Accepted Answer

A)  Shell moulding
B)  Furan process
C)  Phenolic isocyanate process
D)  All of the above D

Question 3

Die casting dies are generally made of

Accepted Answer

A)  aluminium alloys
B)  bronze
C)  cast iron
D)  alloy steels D

Question 4

Gold melts at

Accepted Answer

A)  1063°C
B)  3300°C
C)  1444°C
D)  2100°C

Question 5

In low temperature die casting the metals whose alloys are cast are

Accepted Answer

A)  aluminium and zinc
B)  zinc and copper
C)  copper, zinc and lead
D)  none of the above

Question 6

Which of the following statement is correct?

Accepted Answer

A)  Less sand is used per tonne of non-ferrous castings than for steel
B)  More sand is used per tonne of non-ferrous castings than for steel

Question 7

If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as

Accepted Answer

A)  misrun
B)  inclusions
C)  blow holes
D)  all of the above

Question 8

Which wood is difficult to machine?

Accepted Answer

A)  Kiln dried wood
B)  Old and used wood
C)  Freshly failed wood
D)  Seasoned wood

Question 9

The tool used to make small holes in the sand mould to allow passage of gases/steam is known as

Accepted Answer

A)  Vent wire
B)  Draw screw
C)  Draw spike

Question 10

Coke used in cupola is in the form of

Accepted Answer

A)  coal dust
B)  pulverized coal
C)  lumps
D)  any of the above

Question 11

Graphite is sprinkled on to the surface of green sand moulds to

Accepted Answer

A)  reduce the number of blow holes
B)  minimize surface finish
C)  exclude the burn out effect
D)  improve surface finish

Question 12

The amount of coal dust added to moulding sand depends on

Accepted Answer

A)  shape of the casting
B)  thickness of the casting
C)  temperature of pouring
D)  none of the above

Question 13

Sodium silicate in sand in often used as

Accepted Answer

A)  binder
B)  permeability promotion agent
C)  substitute of clay
D)  refractory material

Question 14

The amount of machining allowance on castings depends on

Accepted Answer

A)  size and shape of the casting
B)  casting orientation
C)  characteristics of the metal
D)  all of the above

Question 15

Chaplets are

Accepted Answer

A)  core binders
B)  core supports
C)  mould seats to support core
D)  core projections

Question 16

Skeleton patterns are generally used for

Accepted Answer

A)  hollow castings
B)  small casting
C)  large castings
D)  non-ferrous castings

Question 17

Shell moulding is a process in which

Accepted Answer

A)  a mould comprising thin shell is produced by mixing dry silica and resin binder
B)  a thin shell is cast in sand mould
C)  a strong core is prepared

Question 18

The method in which green sand is generally used is

Accepted Answer

A)  pit moulding
B)  plate moulding
C)  bench moulding
D)  none of the above

Question 19

The advantage of investment casting is

Accepted Answer

A)  Sound costings are produced
B)  Inricate shapes can be cast
C)  Close tolerances can be achieved
D)  All of the above

Question 20

Pattern used in foundry shop is

Accepted Answer

A)  Somewhat smaller in size than the casting
B)  Somewhat larger in size than the casting
C)  Equal in size to the casting

Exam 4: Foundry and Casting Processes: Properties, Tools, and Methods