Top 150+ Solved Foundry Technology MCQ Questions Answer
Q. The order of dimensional accuracy in die casting is nearly
b. 4 percent
c. 0.4 percent
d. 0.04 percent
e. 0.004 percent
Q. Hairlines in die casted materials result from
a. chemical attack
b. mechanical erosion
c. thermal fatigue
d. all of the above
Q. Flux used in cupola while melting cast iron is
a. lime stone
b. coke slurry
c. molasses
d. any of the above
Q. Which heat treatment is applicable to aluminium alloy castings?
a. Stabilizing
b. Solution heat treatment
c. Artificial ageing
d. all of the above
Q. Die casting is generally not used for
a. cast iron
b. zinc base alloys
c. aluminium base alloys
d. non-ferrous metals
Q. The principal ingredients of moulding sands are
b. silica sand, carbon, hydrocarbons and moisture
c. silica sand, clay and water
d. silica sand, dust and crabon
e. silica sand, carbon and water
Q. The function of ejection pin in die casting is to
a. pushout casting off the die
b. provide movable core spaces
c. facilitate die casting of several components
d. none of the above
Q. Which of the following process is used for melting of steel?
a. L D process
b. Kaldo process
c. Duplex process
d. All of the above
Q. Slag and dross can be removed by
a. skimming from the molten metal
b. using bottom pouring ladle
c. using pouring basin in place of a pouring cup
d. any of the above
Q. Sand acquires a predetermined shape under pressure and retains the same when pressure is removed. This is due to the property of sand known as
a. Cohesiveness
b. Plasticity
c. Refractoriness
d. none of the above
Q. Heat treatment of castings is usually done for
a. refinement of grain structure
b. improving machinability
c. relieving internal stress
d. any of the above
Q. Average amount of sand required in a foundry for making one tonne of casting is nearly
b. 2 tonnes
c. 20 tonnes
d. 0.1 tonne
e. 0.2 tonne
Q. Aluminium is not a very good material for die casting because
a. it is very light but strong
b. its melting point is high, it erodes the die surface and tends to react chemically with die
c. it cools much slowly
d. none of the above