| 1 |
Thermoflask is used maintain: |
- A. Heat
- B. Temperature
- C. Density
- D. Pressure
|
| 2 |
Glider pilots use __________ movement of hot air currents due to convection of heat: |
- A. Downward
- B. Upward
- C. Left
- D. right
|
| 3 |
Dull black surface is a best: |
- A. Emitter
- B. Absorber
- C. Reflector
- D. None of these
|
| 4 |
Which is expert thermal climber: |
- A. Crow
- B. Sparrow
- C. Hawks
- D. None
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| 5 |
Flow of thermal energy from hot body cold body is called: |
- A. Specific heat
- B. Latent heat
- C. Transfer of heat
- D. Heat capacity
|
| 6 |
Light from the sun contain thermal radiation of: |
- A. Long wavelength
- B. Short wavelength
- C. Ultra violet rays
- D. Visible light
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| 7 |
The mathematical formula of thermal conductivity is |
- A. k =Q/t x L/A (T1 - T2)
- B. k =Q/t x L/A (T1 + T2)
- C. k =t/Q x L/A (T1 - T2)
- D. k =2Q/t x L/A (T1 + T2)
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| 8 |
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
|
| 9 |
Larger number of slots are made in radiators to increase: |
- A. Surface temperature
- B. Surface area
- C. Both A and B
- D. Nonr
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| 10 |
At night , the air from land to begins towards sea called: |
- A. Land breeze
- B. Sea breaze
- C. Both A and B
- D. Radiation
|