Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. The effect f rolling on steel is
a. To elongate the inclusions in the direction of rolling giving the steel excellent properties
b. Reduction in tensile strength
c. Reduction in fatigue strength
d. Reduction in hardness
e. None of the above
Q. Fatigue failure occurs when a part is subjected to
a. Tensile stress
b. Compressive stress
c. Torsion
d. Fluctuating stress
e. None of the above
Q. Heavy water is used in atomic power plants as
a. Source of energy
b. Moderator
c. Lubricant
d. Fuel
e. Viscous damping fluid
Q. The surface hardness that can be obtained by nitriding is generally in the range
a. 600 to 800 VPN
b. Strength and hardness of steel is increased
c. 400 to 600 VPN
d. 1000 to 1100 VPN
e. Below 400 VPN
Q. Residual magnetism is
a. Magnetism left in a sample after a decade
b. Magnetism left in a sample after one year
c. Flux density present in a material after magnetising force is removed
d. The magnetic force required to fully demagnetise a sample
e. None of the above
Q. Every material obeys the Hooke's law within
a. Breaking limit
b. Elastic limit
c. Plastic limit
d. Limit of proportionality
e. Yield limit
Q. In cast irons
a. Impact strength is high
b. With static loading the strength in tension is higher than that in compression
c. With static loading the strength in tension is lower than that in compression
d. (A) and (B) above
e. (A) and (C) above
Q. Any process of heating and cooling steel that produces a rounded or globular from of carbide is known as
a. Spheroidizing
b. Drawing
c. Nomalizing
d. Nitriding
e. Ultra hardening
Q. During stress relaxation phenomenon
a. Deformation tends to bind the joint and produces a stress reduction
b. Deformation tends to loosen the joint and produces a stress reduction
c. Stress is no longer proportional to strain
d. Stress reduces on increasing load
e. None of the above
Q. The materials which has the same elastic properties in all directions is called
a. Brittle material
b. Homogeneous material
c. Hard material
d. Isotropic material
e. Isentropic material
Q. Recrystallistion temperature is one
a. At which change of allotropic form takes place.
b. At which crystals start growing in size
c. At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated
d. At which polycrystalline changes occur
e. At which crystals again begin to appear
Q. Super conductors
a. Exist at temperatures below 10?K
b. Are non-crystalline
c. Are non-metallic substances
d. Are the purest forms of metals
e. Are the density metals without voids
Q. In powder metallurgy the process of heating the cold pressed metal powder is known as
a. Sintering
b. Granulation
c. Deposition
d. Precipitation
e. None of the above