Top 80+ Solved Engineering Metallurgy MCQ Questions Answer
Q. An eutectoid steel consists of
a. wholly pearlite
b. wholly austenite
c. pearlite and ferrite
d. pearlite and cementite
Q. In normalizing, one of the following is not correct
a. it relieves internal stresses
b. it produces a uniform structure
c. the rate of cooling is rapid
d. the rate of cooling is slow
Q. Fine grain sizes are obtained by
a. slow cooling
b. increasing nucleation rate
c. decreasing growth rate
d. fast cooling
Q. Which one of the following is not the purpose of full annealing
a. refines grains
b. induces softness
c. removes strains and stresses
d. produces hardest material
Q. Annealing is generally done to impart
a. hardness to the material
b. softness to the material
c. brittleness to the material
d. high conductivity to the material
Q. Which of the following processes is used to harden a steel?
a. normalizing
b. annealing
c. carburizing
d. quenching
Q. The hardness of quenched Martensite
a. increases with increasing carbon percentage
b. decreases as carbon percentage increases
c. first increases and then remains almost constant as the carbon percentage increases
d. first increases and then decreases as carbon percentage increases.
Q. Match the phases of steel in Group I with the crystal structures in Group II P. Martensite 1. bcc Q. Cementite 2. fcc R. Austenite 3. bct S. Ferrite 4. Orthorhombic
a. p-3, q-4, r-1, s-2
b. p-2, q-3, r-1, s-4
c. p-3, q-4, r-2, s-1
d. p-4, q-3, r-2, s-1
Q. Dispersion hardening materials can be produced with the help of followinf process
a. forging
b. rolling
c. powder metallurgy
d. none of the above
Q. in case of carbonitriding by diffusion of which elements the surface become harder of the metal
a. only carbon
b. carbon and nitrogen
c. only nitrogen
d. none of the above
Q. in case of flame hardening the heat source in the form of
a. lpg gas flame
b. furnace oil flame
c. oxy-acetelene flame
d. none of the above
Q. in jominy end quench test sample is quenched by
a. water
b. oil
c. brine water
d. all of the above
Q. In martempering heat treatment, the final phase which obtain
a. ferrite
b. austenite
c. pearlite
d. none of the above
Q. In petenting process, which is the final phase obtainafter completion of heat treatment
a. pearlite
b. bainite
c. martensite
d. austenite