Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Which of the following factor has the least effect on the electrical conductivity of wires made of copper alloy?
a. Temperature
b. Alloying element
c. Vitrified clay
d. Method of forming the wire
e. Intensity of any incident light
Q. Thermoplastic and thermoset polymers differ in
a. Glass transition temperature
b. Thermal behaviour
c. Mechanical behaviour
d. All of the above
e. Semi-conductors
Q. In Brinell hardness testing the time of loading is
a. 5 minutes
b. 1 minute
c. 15 seconds
d. 30 seconds
e. 10 minutes
Q. The property of material by which it can be rolled into sheets is called
a. Elasticity
b. Creep
c. Ductility
d. Malleability
e. Plasticity
Q. The greatest amount of strain energy per unit volume that a material can absorb sithout exceeding its elastic limit is
a. Endurance limit
b. Proof resilience
c. Resilience
d. Toughness
e. Elastic limit
Q. The fatigue limit of a shaft connot be increased by
a. Cold working
b. Nitriding of the surface
c. Shot peening
d. Surface decarburisation
e. Under stressing
Q. A composite bar of steel and copper is heated. The copper bar will be under
a. compression
b. tension
c. torsion
d. shear
e. None of the above
Q. Hot hardness of high speed steels increases due to the addition of
a. Tungsten
b. Phosphorous
c. Chromium
d. Vanadium
e. None of the above
Q. In cold working of metals
a. Poor surface finish is obtained
b. Strength and hardness of steel is increased
c. Close dimensional tolerance cannot be maintained
d. Grain structure remains unchanged
e. Recrystallization temperature for steel is reduced
Q. A ductile fracture is usually not preceded by
a. plastic flow
b. deformation
c. noise
d. large amounts of non-recoverable energy absorption
e. None of the above
Q. In high speed steel the maximum percentage of any alloying element is
a. Chromium
b. Carbon
c. Tungsten
d. Molybdenum
e. Vanadium