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

Question 1

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

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

Answer 1

none of the above

Question 2

Moulding sand properties that depend upon size and shape of grains and bonding material are

A)plasticity and adhesiveness
B)cohesiveness and permeability
C)permeability and plasticity
D)adhesiveness and cohesiveness

Answer 2

cohesiveness and permeability

Question 3

Pattern used in foundry shop is

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

Answer 3

Somewhat larger in size than the casting

Question 4

The advantage of investment casting is

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

Question 5

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

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

Question 6

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

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

Question 7

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

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

Question 8

The permeability of moulding sand depends on

A)grain size
B)grain shape
C)moisture content
D)all of the above

Question 9

Highest melting point metal is

A)cast iron
B)Tungsten
C)Steel
D)Nickel

Question 10

Chaplets are

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

Question 11

Which of the following is measuring and layout tool?

A)Trammels
B)Combination square
C)Marking gauge
D)all of the above

Question 12

The method in which green sand is generally used is

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

Question 13

The amount of machining allowance on castings depends on

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

Question 14

Which of the following process uses organic binder?

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

Question 15

Gold melts at

A)1063°C
B)3300°C
C)1444°C
D)2100°C

Question 16

Which wood is difficult to machine?

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

Question 17

Coke used in cupola is in the form of

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

Question 18

The amount of coal dust added to moulding sand depends on

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

Question 19

Which of the following statement is correct?

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 20

Skeleton patterns are generally used for

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

Question 21

Sodium silicate in sand in often used as

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

Question 22

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

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

Question 23

Pit furnace can be used for the melting of

A)cast iron
B)aluminium
C)brass
D)any of the above

Question 24

Shell moulding is a process in which

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 25

Die casting dies are generally made of

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