Top 1000+ Solved Material Science MCQ Questions Answer
Q. the process by which the internal stresses are reduced in cold worked metal is called
a. strain hardening
b. hot working
c. heat treatment
d. cold treatment
Q. the heat treatment which is used to reduce the internal stresses after cold working is called as
a. hardeninig
b. annealing
c. carburising
d. quenching
Q. during recovery part of annealing treatment, which of the following properties are improved noticeably?
a. hardness, electrical resistance, tensile strength
b. electrical resistance, tensile strength, corrosion resistance
c. tensile strength, corrosion resistance, ductility
d. internal stresses, electrical resistance, corrosion resistance
Q. during which stage of annealing there is no major change in microstructure ?
a. recrystalliza tion
b. recovery
c. grain growth
d. none of the above
Q. the process of formation of new grains starts by the process of
a. recovery
b. nucleation
c. grain growth
d. none of the above
Q. new grain formation take place in stage of annealing treatment
a. recovery
b. grain growth
c. recrystalliza tion
d. none of the above
Q. after the recrystalllization stage
a. hardness and tensile strength reduces
b. internal stresses reduces whereas corrosion resistance increases
c. ductility increases
d. all of the above
Q. during grain growth takes place
a. new grains are formed
b. no change in
c. larger grains are formed
d. all of the above
Q. strain hardening followed by annealing is known as
a. cold working
b. hot working
c. strain hardening
d. all of the above
Q. there are no residual internal stresses after hot working because
a. metal is annealed before hot working
b. there are no dislocations
c. there is simultaneou s working and recrystalliza tion
d. all of the above
Q. wire drawing is a type of
a. cold working
b. hot working
c. cold working followed by hardening
d. none of the above
Q. hot forging is a type of
a. cold working
b. hot working
c. cold working followed by hardening
d. none of the above
Q. in working of metals, the microstructure is distorted
a. hot
b. cold
c. both
d. none of the above
Q. it is possible to continuosly work on metal during working
a. hot
b. cold
c. both
d. none of the above