Engineering Materials Objective Questions Answers

1. The resistance of the most of the conducting materials __ with increase in temperature

a) Increases
b) Decreases
c) Remain same
d) None of the above

A

2. In metals the type of bond present is:

a) Metallic bond
b) Covalent bond
c) Ionic bond
d) None of the above

A

3. The relative permeability of the super conductor materials is:

a) Zero
b) +1
c) -1
d) Infinity

A

4. Forbidden band is largest in:

a) Conductor
b) Semi Conductor
c) Insulator
d) None of the above

C

5. Annealing of metals

a) Removes internal stresses
b) Increases conductivity
c) Increases the grain size
d) Both (a) and (b)

D

6. Which of the following is the best electrical conductor

a) Copper
b) Aluminium
c) Silver
d) Cadmium Copper

C

7. The property of materials by which it can be rolled into sheets is called as:

a) Malleability
b) Elasticity
c) Ductility
d) Plasticity

C

8. The formation of oxide film on the metal is due to atmospheric exposure reduces:

a) Creep limit
b) Stiffness
c) Toughness
d) None of the above

C

9. Gold, Silver and Copper are good conductors because their outer orbits contains:

a) One electron
b) Pair of electrons
c) More than two electrons
d) None of the above

A

10. Solder is an alloy of

a) Lead and tin
b) Aluminium and Copper
c) Copper and Zinc
d) Lead and Zinc

A