| 1 |
Worst absorber of heat is: |
- A. Dull black surface
- B. Coloured surface
- C. Shinning silvered surface
- D. White surface
|
| 2 |
Flow of thermal energy from hot body cold body is called: |
- A. Specific heat
- B. Latent heat
- C. Transfer of heat
- D. Heat capacity
|
| 3 |
Transfer of heat by the actual movement of molecules from one place to the other is called  |
- A. conduction
- B. convection
- C. radiation
- D. waves
|
| 4 |
In building central heating system works on the process of: |
- A. Covection
- B. Radiation
- C. Conduction
- D. both a and b
|
| 5 |
Which surface is bad emitter: |
- A. White surface
- B. Black surface
- C. Coloured surface
- D. Silver surface
|
| 6 |
In houses, good thermal insulation means _____________ consumption of fuel: |
- A. Lower
- B. Higher
- C. Normal
- D. None
|
| 7 |
What gas behaves as glass or polythene to radiation: |
- A. Nitrogen
- B. Hydrogen
- C. Carbon di oxide
- D. Methane
|
| 8 |
Land breeze from land to sea during: |
- A. Day
- B. Night
- C. Afternoon
- D. Morning
|
| 9 |
The transfer of heat by vibrating molecules in solids : |
- A. Conduciton
- B. Radiation
- C. Convection
- D. None
|
| 10 |
Water is _________ conductor: |
- A. Best
- B. Bad
- C. Good
- D. Poor
|