Top 350+ Solved Engineering Materials MCQ Questions Answer
Q. Materials which lack permanent magnetic dipoles are called
a. diamagnetic
b. ferromagnetic
c. semi-magnetic
d. None of the above
e. None of the above
Q. The consitituent which has a powerful softening effect on cast iron and its presence in cast iron reduces the ability of the iron to retain carbon in chemical combination, is
a. Silicon
b. Carbon
c. Sulphur
d. Aluminium
e. Chromium
Q. Which of the following materials demonstrate viscoelastic behaviour?
a. Rubber
b. Glass
c. Plastics
d. Non-crystalline organic polymers
e. All of the above
Q. Carbon steel is
a. An alloy of carbon and iron with varying quantities of phosphorous
b. An alloy of carbon and iron obtained by oxidising excessive carbon from cast iron
c. An alloy of carbon and iron obtained by oxidising excessive carbon steel
d. An alloy of carbon generally obtained by adding graphite to low carbon steels
e. None of the above
Q. A hydrogen atom has
a. Two electrons
b. No neutrons
c. No protons
d. One each electron, neutron and proton
e. None of the above
Q. Which one is different from the others in press work
a. Tube forming
b. Embossing
c. Bulging
d. Cupping
e. Notching
Q. Which of the following properties has lower value for copper as compared to aluminium?
a. Specific gravity
b. Melting point
c. Electrical resistivity
d. All of the above
e. None of the above
Q. A bearing alloy should have
a. High resistance to corrosion
b. Capacity to withstand shocks and vibrations
c. All above
d. Low coefficient of friction
e. High compressive strength
Q. When a loop composed of two dissimilar metals could be made to carry a continuous current simply by maintaining the two junctions at different temperatures, the above effect is known as
a. Thomson effect
b. Thompson effect
c. Peltier effect
d. Seeback effect
e. None of the above
Q. All of the following are point defects EXCEPT
a. vacancies
b. dislocations
c. interstitials
d. isolated impurities
e. None of the above
Q. The limiting load beyond which the material no longer behaves elastically is known is
a. Breaking load
b. Load bearing capacity
c. Limiting load
d. Plastic limit
e. Elastic limit
Q. When elastic limit is reached
a. Tensile strain decreases in proportion to stress
b. Tensile strain increases in proportion to stress
c. Tensile strain increases more quickly
d. Tensile strain decreases more quickly
e. None of the above
Q. In general, high cohesive forces are related to
a. Large values of elastic constants
b. Low melting point
c. Large coefficients of thermal expansion
d. Small value of elastic constants
e. None of the above
Q. Hardness may be defined as resistance to
a. Local penetration
b. Machining
c. Wear
d. Scratching
e. Any of the above
Q. The theory of failure which gives fairly good results for the ductile materials is
a. Hooke's law
b. Maximum shear stress theory
c. Maximum strain energy theory
d. Maximum principal stress theory
e. Maximum shear strain energy theory