Top 150+ Solved Foundry Technology MCQ Questions Answer
Q. Clay content of green sand is usually
a. 5 to 10 percent
b. 1 to 3 percent
c. 30 to 50 percent
d. 18 to 30 percent
Q. The sprue pin/sprue hole used for sand moulds is
b. Tapered downwards
c. Has no taper at all
d. Tapered upwards
Q. Pig iron is obtained from iron ore, in a blast furnace by the process of
a. oxidation
b. desulphurisation
c. reduction
d. carbonation
Q. Which of the following statement about gates is incorrect?
b. he size of gate depends upon the rate of solidification
c. More than one gate may be used to feed a fast freezing casting
d. A gate should not have sharp edges
e. A small gate is used for castings which solidify rapidly
Q. In case of arc furnaces electric supply for electrodes consists of
a. low voltage and high current
b. low voltage and low current
c. high voltage and high current
d. high voltage and low current
Q. The sand used for filling the bulk of the moulding flask
b. Facing sand
c. Dry-sand
d. Floor sand
Q. In fluminium foundry, for removing dissolved hydrogen and the entrapped dross, the flux used is
a. nitrogen
b. helium
c. chlorine
d. any of the above
Q. Choose the correct statement in respect of die casting machine
a. In hot chamber die casting machine the metal is melted in the machine itself
b. In cold chamber die casting machine metal of low melting point is cast
c. In cold chamber die casting machine there is no need to cool the die from outside
d. none of the above
Q. The thicker sections of casting will have a tendency to have
a. grains coarser than thinner sections
b. grains finer than thinner sections
c. grains of sme size as rest of the casting
d. none of the above
Q. The moulding tool used for finishing/repairing the sand mould after pattern withdrawal is termed as
b. Slincks
c. Lifters or cleaners
d. Trowels
Q. Which of the following test on castings is based on sound?
b. Magnetic particle inspections
c. Percussion test
d. Impact test
e. Radiographic
Q. Presence of sulphur in cast iron
a. retards fluidity
b. promotes brittleness
c. promotes oxidation
d. all of the above
Q. Distortion in castings can be reduced by
a. modifying design
b. providing sufficient machining allowance
c. improving foundry practice
d. all of the above
Q. Which of the following facilitates shaking and lifting large pattern from the mould?
a. Swab
b. Bellows
c. Trowel
d. Ripping plate
Q. In die castings, heavy local sections are usually avoided and replaced by
a. channel sections
b. corrugated forms
c. ribs
d. any of the above