Top 150+ Solved Foundry Technology MCQ Questions Answer
Q. Which inoculant is used to produced ductile iron?
a. Graphite
b. Carbon
c. Fluorides
d. Magnesium
Q. There is no need for the withdrawal of pattern from the mould in case of
a. patterus with core
c. wax patterns
d. hollow patterns
e. consumable patterns
Q. Annealing of aluminium castings
a. improves ductility
b. relieves micro stresses
c. reduces tensile strength
d. mechanical properties change
Q. The sand mass does not fall out of the moulding box but is held firmly in it when the moulding box is lifted. This is due to the property of
a. adhesiveness of sand
b. plasticity of sand
c. porosity of sand
d. refractoriness of sand
Q. Which of the following is used to obtain fine surface finish in ferrous castings?
a. Ground pitch
b. Sea coal
c. Gilsonite
d. any of the above
Q. For grey cast iron the pouring temperature is
a. 1400 to 1465?C
b. 1455 to 1495?C
c. 1250 to 1290?C
d. 1510 to 1532?C
Q. Permeability of sand decreases as
a. permeability increases
b. moisture content increases
c. bonding content increases
d. all of the above
Q. On the interior surfaces the draft allowance is usually
a. 40 to 60 mm/metre
b. 10 to 20 mm/metre
c. 100 to 120 mm/metre
d. 200 to 225 mm/metre
Q. The hardness of the mould is affected by the proportion of ingredients in the sand and
a. degree of ramming
b. the temperature
c. shape of particles
d. refractoriness
Q. In furan process, furan resins are primarily used as
a. binders
b. chemicals for exothermic reactions
c. fluxes
d. none of the above
Q. The advantage of investment casting is
a. high degree of accuracy
b. adaptability to casting of most of the metals
c. complex shaped articles can be cast
d. all of the above
Q. Core prints are
a. made separately in the mould by hand
b. made in the mould be separate pattern
c. attached to pattern
d. none of the above
Q. In die casting
b. there is no need of air venting
c. there is no restriction of material, any material that can be poured can be cast
d. the product surface is smooth and clean without the parting line
e. the heat loss from molten metal is fast as the mould is metallic
Q. The water content of green sand is usually
b. 1 to 2 percent
c. 20 to 25 percent
d. 6 to 8 percent
e. 12 to 18 percent