Question 1

Use of flux in melting of magnesium

Accepted Answer

A)  separates out impurities
B)  prevents burning of magnesium alloys
C)  facilitates production of sound cstings
D)  all of the aboveE) A) and C)
F) B) and D) D

Question 2

Molybdenum upto 1.5% is added to cast iron to

Accepted Answer

A)  improve strength
B)  reduce wear resistance
C)  increase machinability
D)  all of the aboveE) B) and D)
F) A) and B) A

Question 3

When external features of the castings are important, which of the following method of casting is preferred?

Accepted Answer

A)  Die casting
B)  Slush casting
C)  Carbondioxide casting
D)  Dry sand castingE) None of the above
F) A) and B)

Question 4

Metal moulds are used in all of the following EXCEPT

Accepted Answer

A)  Investment casting
B)  Permanent mould casting
C)  Centrifugal casting
D)  Die casting processE) A) and D)
F) A) and C)

Question 5

A blast furnace operates continuously for

Accepted Answer

A)  weeks together
B)  days together
C)  hours together
D)  months togetherE) None of the above
F) A) and B)

Question 6

Which of the following is used to increase refractoriness of sand?

Accepted Answer

A)  Graphite
B)  Silica flour
C)  Iron free zirconium
D)  all of the aboveE) A) and B)
F) A) and C)

Question 7

Generally for the melting of cast iron, electric furnaces are not used because

Accepted Answer

A)  cast iron is in the form of broken pieces
B)  It is expensive to use electricity for melting of cast iron
C)  the rate of heating required for melting cast iron connot be provided by electric furnaces
D)  cast iron requires higher temperature for heatingE) A) and B)
F) All of the above

Question 8

In carbondioxide moulding the pressure of carbondioxide is around

Accepted Answer

A)  500 kg/cm2
B)  1.5 kg/cm2
C)  15 kg/cm2
D)  150 kg/cm2E) A) and B)
F) A) and C)

Question 9

Which of the following cast iron is resistant to attack by sea water?

Accepted Answer

A)  Low nickel cast iron
B)  Low sulphur cost iron
C)  Low chromium cast iron
D)  Low phosphorous cast ironE) A) and B)
F) A) and C)

Question 10

A cupola one metre in diameter and 4 metres in height will melt in one hour about

Accepted Answer

A)  0.5 tonnes of iron
B)  10 tonnes of iron
C)  5 tonnes of iron
D)  2 tonnes of ironE) C) and D)
F) A) and D) D

Question 11

A blind riser can be located

Accepted Answer

A)  in cheek only
B)  in either cope or drag
C)  in drag
D)  in copeE) B) and D)
F) A) and C)

Question 12

As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will have

Accepted Answer

A)  larger grain size
B)  smaller grain sizeC) A) and B)
D) undefined

Question 13

For producing several similar parts from a single mould the moulding used is

Accepted Answer

A)  bench moulding
B)  floor moulding
C)  plate moulding
D)  none of the aboveE) A) and C)
F) C) and D)

Question 14

Shaving of die casted parts is the process of removal of

Accepted Answer

A)  sprue
B)  flash
C)  runner
D)  none of the aboveE) A) and D)
F) A) and C)

Question 15

The drawback with metallic pattern is

Accepted Answer

A)  excessive weight
B)  expensive
C)  difficult to shape
D)  all of the aboveE) All of the above
F) B) and D)

Question 16

The solidification shrinkage of magnesium alloys is about

Accepted Answer

A)  4 percent
B)  1 percent
C)  0.1 percent
D)  14 percentE) A) and B)
F) A) and C)

Question 17

Which variety of cast iron can be forged?

Accepted Answer

A)  Grey cast iron
B)  High silicon cast iron
C)  Wrought iron
D)  All of the aboveE) A) and B)
F) B) and C)

Question 18

A pit furnace can be used for the melting of

Accepted Answer

A)  cast iron
B)  brass
C)  aluminium
D)  all of the aboveE) A) and C)
F) B) and D)

Question 19

Shell patterns are often used for

Accepted Answer

A)  pipe work
B)  bends
C)  drainage fittings
D)  all of the aboveE) All of the above
F) A) and D)

Question 20

The property of the foundry sand which enables it to adhere to the surface of other materials is termed

Accepted Answer

A)  Cohesiveness
B)  Adhesiveness
C)  Either of (
A)   or (
B)  D) A) and C)
E) A) and B)

Exam 5: Casting and Foundry Technology

Use of flux in melting of magnesium

Correct AnswerverifiedD

Molybdenum upto 1.5% is added to cast iron to

Correct AnswerverifiedA

When external features of the castings are important, which of the following method of casting is preferred?

Correct AnswerverifiedShow Answer

Metal moulds are used in all of the following EXCEPT

Correct AnswerverifiedShow Answer

A blast furnace operates continuously for

Correct AnswerverifiedShow Answer

Which of the following is used to increase refractoriness of sand?

Correct AnswerverifiedShow Answer

Generally for the melting of cast iron, electric furnaces are not used because

Correct AnswerverifiedShow Answer

In carbondioxide moulding the pressure of carbondioxide is around

Correct AnswerverifiedShow Answer

Which of the following cast iron is resistant to attack by sea water?

Correct AnswerverifiedShow Answer

A cupola one metre in diameter and 4 metres in height will melt in one hour about

Correct AnswerverifiedD

A blind riser can be located

Correct AnswerverifiedShow Answer

As compared to green sand in shell moulding cooling rate of cast metal is slow. Hence as compared to green sand castings, shell moulded castings will have

Correct AnswerverifiedShow Answer

For producing several similar parts from a single mould the moulding used is

Correct AnswerverifiedShow Answer

Shaving of die casted parts is the process of removal of

Correct AnswerverifiedShow Answer

The drawback with metallic pattern is

Correct AnswerverifiedShow Answer

The solidification shrinkage of magnesium alloys is about

Correct AnswerverifiedShow Answer

Which variety of cast iron can be forged?

Correct AnswerverifiedShow Answer

A pit furnace can be used for the melting of

Correct AnswerverifiedShow Answer

Shell patterns are often used for

Correct AnswerverifiedShow Answer

The property of the foundry sand which enables it to adhere to the surface of other materials is termed

Correct AnswerverifiedShow Answer

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D

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