| 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 |
The increase in thermal pollution of environment means. |
- A. Increase in the entropy
- B. Decrease in the entropy
- C. Entropy remains constant
- D. Entropy becomes zero
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| 3 |
Which one is true for isothermal process. |
- A. Q = 0
- B. W = 0
- C. Q = W(D) Delta U = 0
- D. None of these
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| 4 |
A diatomic gas molecules has |
- A. Translational energy only
- B. Rotational energy only
- C. Vibrational energy only
- D. All translational, Rotational and vibrational energy
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| 5 |
At constant temperature and pressure, if volume of given mass of a gas is doubled then density is. |
- A. Doubled
- B. 1/4 original
- C. 1/2 of original
- D. Unchanged
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| 6 |
In the thermodynamics process , the equation W = -delta U represents. |
- A. Isothermal expension
- B. Isothermal compression
- C. Adiabatic expansion
- D. Adiabatic compression
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| 7 |
The SI unit of product of pressure and volume is. |
- A. <sub>Watt</sub>
- B. Joule
- C. Pascal
- D. Newton
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| 8 |
The kinetic energy of molecules of an ideal gas at absolute zero is |
- A. Very low
- B. Very high
- C. Zero
- D. First increases then decreases
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| 9 |
Unite of thermodynamics scale of temperature is. |
- A. Centigrade
- B. Fahrenheit
- C. Kelvin
- D. Celsius
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| 10 |
the work done in isochoric process is. |
- A. Constant
- B. Variable
- C. Zero
- D. Depend upon condition
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