| 1 |
False ceiling is done to |
- A. Lower the height of ceiling
- B. Keep the roof clean
- C. Cool the room
- D. Insulate the ceiling
|
| 2 |
Dull black surface are good ____________ |
- A. Absorber
- B. Radiator
- C. Conductor
- D. None of these
|
| 3 |
At night , the air from land to begins towards sea called: |
- A. Land breeze
- B. Sea breaze
- C. Both A and B
- D. Radiation
|
| 4 |
In thermo flask radiation is stopped by using : |
- A. Green color
- B. Transparent
- C. Silver color
- D. Nil
|
| 5 |
Which of the following is a good radiator of heat? |
- A. A shining slivered surface
- B. A dull black surface
- C. A white surface
- D. A green coloured surfaced
|
| 6 |
The amount of heat absorb by body depends on the : |
- A. Colour of the surface
- B. Nature of surface
- C. Texture of surface
- D. Both A and B
|
| 7 |
In gases, heat in mainly transferred by: |
- A. Molecular collision
- B. Conduction
- C. Convection
- D. Radiaiton
|
| 8 |
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
|
| 9 |
Heat can be transmitted form one object to the other by |
- A. convection
- B. radiation
- C. conduction
- D. all of these
|
| 10 |
Convection of heat is the process of heat transfer due to the |
- A. Random motion of molecules
- B. Downward movement of molecules
- C. Upward movement of molecules
- D. Free movement of molecules
|