Practice Test: Question Set - 05
1. The metal having the lowest temperature coefficient of resistance is
- (A) Gold
- (B) Copper
- (C) Aluminium
- (D) Kanthal
2. By increasing impurity content in the metal alloy the residual resistivity always
- (A) Decreases
- (B) Increases
- (C) Remains constant
- (D) Becomes temperature independent
3. _______ is the main constituent of glass
- (A) Fe2O3
- (B) SiO2
- (C) AI2O3
- (D) B2O3
4. Which of the following materials does not have covalent bonds?
- (A) Organic polymers
- (B) Silicon
- (C) Metals
- (D) None of the above
5. Which of the following are non-conductors of electricity?
- (A) Non-metal solids except carbon
- (B) Air and most other gases
- (C) Pure water and liquids in general except
mercury
- (D) All of the above
6. Is the property of absorbing moisture from atmosphere?
- (A) Solubility
- (B) Viscosity
- (C) Porosity
- (D) Hygroscopicity
7. Spark plug makes use of which of the following materials for insulation?
- (A) Porcelain
- (B) Slate
- (C) Asbestos
- (D) Glass
8. In conductors conduction of electricity takes place due to movement of
- (A) Electrons only
- (B) Positive ions only
- (C) Negative ions only
- (D) Positive and negative ions
9. Total number of crystal systems is
- (A) 2
- (B) 4
- (C) 7
- (D) 12
10. Which of the following is an advantage of stranded conductor over equivalent single conductor?
- (A) Less liability to kink
- (B) Greater flexibility
- (C) Less liability to break
- (D) All of the above
0 blogger:
Post a Comment