| 1 |
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
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| 2 |
Which of following is irreversible process |
- A. Slow compression of an elastic spring
- B. Slow evaporation of substances in isolated vessel
- C. Slow expansion of a gas
- D. A chemical explosion
- E. <br>
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| 3 |
Transformation of heat other forms of energy is discussed in |
- A. Thermal physics
- B. Thermodynamics
- C. Atomic physics
- D. Nuclear physics
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| 4 |
An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at. |
- A. 0 K
- B. 0 <sup>o</sup>C
- C. 100 K
- D. 100 <sup>o</sup>C
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| 5 |
Entropy of measure of. |
- A. Internal energy of system
- B. Order of system
- C. Disorder of system
- D. Potential energy of system
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| 6 |
The efficiency of diesel engine is about |
- A. 25 % to 30%
- B. 35% to 40%
- C. 40% to 50%
- D. 50% to 60%
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| 7 |
The number of spark plug needed in diesel engine is |
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| 8 |
Efficiency of steam locomotive is. |
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| 9 |
The work done is isochoric process is. |
- A. Constant
- B. Variable
- C. Zero
- D. Depend upon condition
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| 10 |
Efficiency of a heat engine working between 27 <sup>o</sup>C and 32 <sup>o</sup>C will be. |
- A. 50%
- B. 90%
- C. 40%
- D. 62%
|