Top 150+ Solved Foundry Technology MCQ Questions Answer
Q. Tempering is generally done to reduce all of the following EXCEPT
a. Hardness
b. Brittleness
c. Tensile strength
d. Ductility
Q. The solidification shrinkage of carbon steel is around
b. 0.5 to 1 percent
c. 2 to 4 percent
d. 8 to 10 percent
e. 0.1 to 0.2 percent
Q. The draft allowance to be provided on a pattern depends on
a. the length of the vertical side of the pattern to be extracted
b. the intricacy of the pattern
c. the method of moulding
d. all of the above
Q. Magnesium aluminium alloys are grain refined by addition of
a. manganese
b. sulphur
c. carbon
d. tin
Q. The advantage of oxygen enriched cupola is
a. higher temperature of molten iron
b. high efficiency of cupola
c. reduced heat loss in waste gases
d. all of the above
Q. The contraction allowance for pattern depends on
a. composition of the metal
b. method of moulding used
c. pouring temperature
d. all of the above
Q. The advantage of shell moulding is
a. Less sand requirement
b. Process can be used for all cast metals
c. Good accuracy of dimensions
d. All of the above
Q. Providing more than adequate machining allowance
b. reduces machining cost
c. increases machining cost
d. improves the strength of the casting
e. reduces the strength of the casting
Q. As a result of melting in cupola, the percentage of all of the following constituents decreases EXCEPT
a. Sulphur
b. Silicon
c. Phosphorous
d. Carbon
Q. Chaplets are provided to
a. reduce core sag
b. support heavy cores
c. compensate for inadequate coreseats
d. all of the above
Q. Polystyrene often used as a consumable pattern material has a relative density of
a. 20 to 25 kg/m3
c. 2240 to 2500 kg/m3
d. 120 to 125 kg/m3
e. 1120 to 1125 kg/m3
Q. For stress relieving, castings are
a. heated to low temperature and furnace cooled
b. heated to a temperature around melting point and slowly cooled
c. heated in stages and also cooled in stages
d. heated by flame and air cooled
Q. Gated patterns are normally used for
a. castings for light metals
b. castings having several hollow spaces
c. mass production of small castings
d. production of castings which do not require machining