Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Identify the correct statement
a. A metal which is brittle in tension at room temperature can become ductile in the presence of notches
b. A metal which is brittle in tension t room presence of embrittlement agents such as hydrogen
c. A metal which is ductile in tension at room temperature can become brittle in the presence of notches
d. A metal which is ductile in tension at room temperature can become brittle under gradual rate of loading
e. None of the above
Q. The process of heating iron base alloys to approzimately 40?C above the critical temperature range followed by cooling to below that range in still air at ordinary temperature is known as
a. Normalizing
b. Tempering
c. Hardening
d. Spheroidizing
e. Annealing
Q. Bainiti is a fine maxture of
a. ferrite and cementite
b. cementitie and peoitite
c. pearlite and ferrite
d. austenti and ferrite
e. None of the above
Q. In inverse rate curve
a. The ordainate is temperature
b. The abscissa is time
c. The abscissa is temperature
d. The ordinate is time
e. The abscissa is carbon percentage
Q. In Brinell hardness tests if a soft ball is used for indentation
a. The indentation will not eb circular
b. It will not be possible to correctly measure the depth of indentation
c. The surface of indentation will be rough
d. The ball may deform
e. None of the above
Q. High purity copper is obtained by
a. casting
b. rolling
c. induction heating
d. electric refining
e. None of the above
Q. A solution of NaOH conducts electricity bcause NaOH is
a. A dielectric
b. A non-electrolyte
c. A strong electrolyte
d. A week electrolyte
e. None of the above
Q. The process by which a steel ingot is converted into a sheet is known as
a. Rolling process
b. Routing process
c. Re-rolling process
d. Machining process
e. Forging process
Q. Eutectic is
a. a phase transformation in which all the liquid phase transforms on cooling to two solid phases simultaneously
b. A phase transformation which occurs above the glass transition temperature
c. a solid solution of one component in another
d. None of the above
e. None of the above
Q. One of the objects of annealing is
a. To refine grain structure
b. To soften the metal
c. to improve machinability
d. All above
e. To refine internal stresses
Q. Silicon steel used for electrical purposes has silicon percentage of
a. 3.40%
b. 2.50%
c. 13.40%
d. 1.50%
e. 0.50%
Q. Which of the following method can be used for thermoplastic materials?
a. Blow moulding
b. Casting
c. Calendering
d. Compression moulding
e. None of the above
Q. Which of the following polymer is crystalline?
a. Semi-conductors
b. Polyvinylidene chloride
c. Polyvinyl chloride
d. Polyethylene
e. Polymethyl metacrylate
Q. Which of the following alloy does not contain tin?
a. Gun metal
b. Phosphor bronze
c. Fusible plug material
d. White metal
e. All of the above
Q. The behavious of visco-elastic material is
a. Time dependent
b. Independent of time
c. Plastic
d. Elastic
e. Ductile