Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. When the temperature of a semi-conductor is reduced to absolute zero
a. all electrons become free
b. electrons move at higher velocities
c. all valence electrons remain in the valence bond
d. all valence electrons shift to forbidden gap
e. None of the above
Q. Which of the following pipe will corrode easily?
a. Stainless steel pipe
b. GI pipe
c. ERW pipe
d. Copper pipe
e. Lead pipe
Q. Identify the correct relation
a. Mass number - Atomic number = Number of neutrons
b. Mass number - Atomic number = Number of protons
c. Number of neutrons - Number of protons = Mass number
d. Number of electrons outside the nucleus - Number of proton = Mass number
e. None of the above
Q. In which of the following case creep is an important consideration?
a. Piston of an air compressor
b. Exhaust valve of a diesel engine
c. Blades of a steam turbine
d. Flywheel of a petrol engine
e. Shaft of a centrifugal compressor
Q. Malleal lity of a material is defined as
a. Ability to withstand compressive stresses
b. Ability to withstand deformation under shear
c. Ability to undergo large permanent deformation in compression
d. The property by which a material can be cold worked
e. None of the above
Q. Which process is used for joining parts or materials?
a. Extruding
b. Tumbling
c. Swaging
d. Parkerizing
e. Sintering
Q. In case of eutectoid steels which one of the following structures has the maximum hardness?
a. Troosite
b. Sorbite
c. Pearlite
d. Acicular
e. Martensite
Q. Ductility of material may be defined as
a. Ability to undergo temporary deformation in tension
b. Capacity to withstand combined tensile and shear forces
c. Ability to undergo large permanent deformations in tension
d. Capacity to withstand reversal of stresses
e. Capacity to resist deformation under pressure
Q. The primary purpose of annealing is to
a. Restrict the hardness of steel
b. Soften the steel for machining after cold working
c. Reduce carbon percentage
d. Change the crystalline structure
e. None of the above
Q. Isotropic materials have
a. Same elastic properties in all directions
b. Cannot take shear as well as tensile stress
c. Variable thermal as well as electrical conductivity
d. Different elastic properties in different directions
e. Different compressive and tensile stresses at different locations in the same material
Q. Most of the energy expended in deforming a metal by cold working is
a. Utilised in overcoming deformation stresses
b. Utilised in deforming the metal
c. Converted into heat
d. Consumed in developing internal stresses
e. None of the above
Q. The properties of cast iron are regulated by
a. Heat treatment
b. Percentage of carbon present
c. Heating temperature
d. The composition of raw material
e. Control of amount, type, size and distribution of various carbon formations