Question 1

Melting point of copper

Accepted Answer

A) 1444°C 
B) 1576°C 
C) 665°C 
D) 1083°C 
A) 1444°C 
B) 1576°C 
C) 665°C 
D) 1083°C D

Question 2

Swelling of castings may occur due to

Accepted Answer

A) insufficient ramming 
B) rapid pouring of molten metal 
C) insufficient weight on the moulds during pouring 
D) any of the above 
A) insufficient ramming 
B) rapid pouring of molten metal 
C) insufficient weight on the moulds during pouring 
D) any of the above D

Question 3

Which statement is not true for green sand moulding?

Accepted Answer

A) Moulds are cheapest 
B) Preparation of moulds is less time consuming 
C) Defect free and castings with good surface is obtained 
D) none of the above 
A) Moulds are cheapest 
B) Preparation of moulds is less time consuming 
C) Defect free and castings with good surface is obtained 
D) none of the above C

Question 4

A mould cracks after drying. It indicates

Accepted Answer

A) excess of clay 
B) lack of clay 
C) coarse irregular grains 
D) none of the above 
A) excess of clay 
B) lack of clay 
C) coarse irregular grains 
D) none of the above

Question 5

In case of malleable iron castings, the contraction allowance on pattern

Accepted Answer

A) is independent of section thickness 
B) increass as the section thickness of casting increases 
C) decreases as the section thickness of casting increases 
A) is independent of section thickness 
B) increass as the section thickness of casting increases 
C) decreases as the section thickness of casting increases

Question 6

Inoculants are added to aluminium mainly for

Accepted Answer

A) grain refinement 
B) directional solidification 
C) purification 
D) all of the above 
A) grain refinement 
B) directional solidification 
C) purification 
D) all of the above

Question 7

Permanent mould casting is also known as

Accepted Answer

A) chill casting 
B) short casting 
C) gravity die casting 
D) slush casting 
A) chill casting 
B) short casting 
C) gravity die casting 
D) slush casting

Question 8

Consumable patterns are made of

Accepted Answer

A) polystyrene 
B) wax 
C) plaster of paris 
D) any of the above 
A) polystyrene 
B) wax 
C) plaster of paris 
D) any of the above

Question 9

Which wood can be used for making patterns?

Accepted Answer

A) Mathogany 
B) Pine wood 
C) Teak wood 
D) any of the above 
A) Mathogany 
B) Pine wood 
C) Teak wood 
D) any of the above

Question 10

In case of plaster moulding the mould is prepared in

Accepted Answer

A) gypsum plaster 
B) slacked lime 
C) lime + cement 
D) any of the above 
A) gypsum plaster 
B) slacked lime 
C) lime + cement 
D) any of the above

Question 11

As the moisture content of sand increases

Accepted Answer

A) permeability remains unchanged 
B) permeability decreases 
C) permeability increases 
A) permeability remains unchanged 
B) permeability decreases 
C) permeability increases

Question 12

According to Chvorinov's equation, the solidification time of castings is

Accepted Answer

A) Directly proportional to square of the volume of the casting 
B) inversely proportional to the volume the casting 
C) inversely proportional to square of the volume of the casting 
D) directly proportional to the volume of the castings 
A) Directly proportional to square of the volume of the casting 
B) inversely proportional to the volume the casting 
C) inversely proportional to square of the volume of the casting 
D) directly proportional to the volume of the castings

Question 13

Shrinkage cavity in a casting may be formed due to

Accepted Answer

A) haphazard solidification of metal 
B) improperly sized gating 
C) high pouring temperatures 
D) any of the above 
A) haphazard solidification of metal 
B) improperly sized gating 
C) high pouring temperatures 
D) any of the above

Question 14

The function of riser is

Accepted Answer

A) to allow the heat of molten metal to dissipate to atmosphere 
B) to provide an opening through which molten metal is poured 
C) to give an indication that mould is filled 
D) to supply molten metal to casting as it tends to contract during solidification 
A) to allow the heat of molten metal to dissipate to atmosphere 
B) to provide an opening through which molten metal is poured 
C) to give an indication that mould is filled 
D) to supply molten metal to casting as it tends to contract during solidification

Question 15

Which of the following holes appear on the surface of the casting when it is machined?

Accepted Answer

A) Pin holes 
B) Slag holes 
C) Gas holes 
D) Blow holes 
A) Pin holes 
B) Slag holes 
C) Gas holes 
D) Blow holes

Question 16

A casting process which can produce cylinders by inserting cores into molten metal poured in the mould is

Accepted Answer

A) Semi permanent mould casting 
B) pressed casting 
C) permanent mould or gravity die casting 
D) none of the above 
A) Semi permanent mould casting 
B) pressed casting 
C) permanent mould or gravity die casting 
D) none of the above

Question 17

Rough surface of casting may result from

Accepted Answer

A) high permeability of sand 
B) large grain size 
C) soft ramming 
D) any of the above 
A) high permeability of sand 
B) large grain size 
C) soft ramming 
D) any of the above

Question 18

The advantage of permanent mould casting is

Accepted Answer

A) reduced labour charges 
B) reduced mould cost 
C) dense, fine grained structure 
D) all of the above 
A) reduced labour charges 
B) reduced mould cost 
C) dense, fine grained structure 
D) all of the above

Question 19

Moisture content of the moulding sand is commonly

Accepted Answer

A) 5% - 15% 
B) 1% - 4% 
C) 2% - 8% 
A) 5% - 15% 
B) 1% - 4% 
C) 2% - 8%

Question 20

Contraction allowance for grey cast iron is (in mm/m)

Accepted Answer

A) 21 
B) 30 
C) 10.5 
A) 21 
B) 30 
C) 10.5

Melting point of copper

Swelling of castings may occur due to

Which statement is not true for green sand moulding?

A mould cracks after drying. It indicates

In case of malleable iron castings, the contraction allowance on pattern

Inoculants are added to aluminium mainly for

Permanent mould casting is also known as

Consumable patterns are made of

Which wood can be used for making patterns?

In case of plaster moulding the mould is prepared in

As the moisture content of sand increases

According to Chvorinov's equation, the solidification time of castings is

Shrinkage cavity in a casting may be formed due to

The function of riser is

Which of the following holes appear on the surface of the casting when it is machined?

A casting process which can produce cylinders by inserting cores into molten metal poured in the mould is

Rough surface of casting may result from

The advantage of permanent mould casting is

Moisture content of the moulding sand is commonly

Contraction allowance for grey cast iron is (in mm/m)

Foundry Processes and Materials

Foundry and Casting

Casting Techniques and Processes

Foundry and Casting Processes: Properties, Tools, and Methods

Casting and Foundry Technology

Foundry Operations and Techniques

Casting and Moulding Processes: Part B

Foundry Processes and Techniques

Casting Processes and Materials

Casting and Moulding Processes: Techniques and Defects

Filters

Exam 7: Casting and Moulding Processes: Part A

Melting point of copper

Swelling of castings may occur due to

Which statement is not true for green sand moulding?

A mould cracks after drying. It indicates

In case of malleable iron castings, the contraction allowance on pattern

Inoculants are added to aluminium mainly for

Permanent mould casting is also known as

Consumable patterns are made of

Which wood can be used for making patterns?

In case of plaster moulding the mould is prepared in

As the moisture content of sand increases

According to Chvorinov's equation, the solidification time of castings is

Shrinkage cavity in a casting may be formed due to

The function of riser is

Which of the following holes appear on the surface of the casting when it is machined?

A casting process which can produce cylinders by inserting cores into molten metal poured in the mould is

Rough surface of casting may result from

The advantage of permanent mould casting is

Moisture content of the moulding sand is commonly

Contraction allowance for grey cast iron is (in mm/m)

Foundry Processes and Materials

Foundry and Casting

Casting Techniques and Processes

Foundry and Casting Processes: Properties, Tools, and Methods

Casting and Foundry Technology

Foundry Operations and Techniques

Casting and Moulding Processes: Part B

Foundry Processes and Techniques

Casting Processes and Materials

Casting and Moulding Processes: Techniques and Defects

Filters