| 1 |
A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes. |
- A. Halve
- B. Doubled
- C. Four time
- D. Constant
|
| 2 |
Entropy remains constant. |
- A. Isothermal process
- B. Adiabatic process
- C. Isochoric process
- D. Isobaric process
|
| 3 |
Heat is form of. |
- A. Power
- B. Momentum
- C. Energy
- D. Torque
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| 4 |
A Carnot engine has an efficiency of 50% when its sink temperature is at 27 <sup>o</sup>C. The temperature of source. |
- A. 273<sup> o</sup>C
- B. 300 <sup>o</sup>C
- C. 327 <sup>o</sup>C
- D. 373 <sup>o</sup>C
|
| 5 |
Force acting on the piston to move outward is. |
- A. Compressive stoke
- B. Power stoke
- C. All stoke
- D. Exhaust stoke
|
| 6 |
If the temperature of sink is absolute zero then the efficiency of heat engine engine should be. |
- A. 100%
- B. 50%
- C. Infinite
- D. zero
|
| 7 |
The temperature scale which is independent of nature of substance is. |
- A. Thermodynamic scale
- B. Centigrade scale
- C. Fahrenheit scale
- D. Regnault scale
|
| 8 |
The mean kinetic energy of gas is at. |
- A. 0 <sup>o</sup>C
- B. -273 <sup>o</sup>C
- C. 100 K
- D. 100 <sup>o</sup>C
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| 9 |
For working of heat engine, there must be. |
- A. A source
- B. A sink
- C. either of these
- D. Both of these
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| 10 |
An ideal reversible heat engine has |
- A. 100% efficiency
- B. Highest efficiency
- C. 80%
- D. 90%
|