Top 80+ Solved Engineering Metallurgy MCQ Questions Answer
Q. In carburisng process which of the following element is diffused in a metal surface?
a. nitrogen
b. oxygen
c. carbon
d. carbide dioxide
Q. Out of the following process,one is not valid with respect to carburising process
a. solid
b. liquid
c. gas
d. all of the above
Q. heat treatment is never required after carburisig treatment.this statement is …………
a. false
b. true
c. not applicable
d. none of the above
Q. In nitriding process which of the following element is diffused in a surface layer of a steel
a. carbon
b. carbon and nitrogen
c. nitrogen
d. all of the above
Q. one of the following is a step for the procedureof precipitation hardening or age hardening?
a. solution treatment
b. quenching
c. aging
d. all of the above
Q. One of the following metal alloy is suitable for the precipitation hardenable alloy?
a. al-zn
b. al-ni
c. al-cr
d. al-cu
Q. in case of flame hardening ,the heat source is in the form of …….
a. lpg gas flame
b. furnace oil flame
c. oxy-acetylen flame
d. none of the above
Q. in flame hardening process,the metal surface after heating to high temperature is quenched with ……
a. oil
b. brine water
c. water
d. all of the above
Q. In case of carbonitriding,by diffusion of which elements the surface become harder of a metal
a. only carbon
b. carbon and nitrogen
c. only nitrogen
d. none of the above
Q. Dislocation are stopped by a ……
a. nuceation
b. grain growth
c. grain boundry
d. none of the above
Q. Finer grain size,higher will be the …
a. hardness
b. ductility
c. yield stress
d. none of the above
Q. Work hardening also called as
a. precipetation hardening
b. hardening
c. strain hardening
d. none of the above
Q. some materials can not be work hardened at normal ambient temp. such as …….. Material.
a. niobium
b. indium
c. beryllium
d. none of the above
Q. In solid solution strengthening to ……the hardness of material.
a. decreases
b. increases
c. reduced
d. none of the above
Q. The number of solute atoms is more……will be the local distortion in the lattice.
a. greater
b. smaller
c. less
d. none of the above