Discussion
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- Question
By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
Options- A. True
- B. False
- Correct Answer
- False
- 1. One kg of carbon requires 8/3 kg of oxygen for its complete combustion and produces 11/3 kg of carbon dioxide gas.
Options- A. Agree
- B. Disagree Discuss
- 2. The increase in entropy of a system represents
Options- A. increase in availability of energy
- B. increase in temperature
- C. decrease in pressure
- D. degradation of energy Discuss
- 3. A perpetual motion machine of the first kind is __________ according to first law of thermodynamics.
Options- A. possible
- B. impossible Discuss
- 4. The gas in cooling chamber of a closed cycle gas turbine is cooled at
Options- A. constant volume
- B. constant temperature
- C. constant pressure
- D. none of these Discuss
- 5. The heating of gas at constant volume is governed by
Options- A. Boyle's law
- B. Charles' law
- C. Gay-Lussac law
- D. Avogadro's law Discuss
- 6. In a free expansion process,
Options- A. W1 - 2 = 0
- B. Q1 - 2 = 0
- C. dU = 0
- D. all of these Discuss
- 7. In closed cycle gas turbine, the air is compressed
Options- A. isothermally
- B. isentropically
- C. polytropically
- D. none of these Discuss
- 8. The efficiency of a gas turbine is given by
Options- A.
- B.
- C.
- D.
Discuss
- 9. Boyle's law states that change of internal energy of a perfect gas is directly proportional to the change of temperature.
Options- A. Agree
- B. Disagree Discuss
- 10. A process, in which the gas is heated or expanded in such a way that product of its pressure and volume remains constant, is called isothermal process.
Options- A. Yes
- B. No Discuss
Thermodynamics problems
Search Results
Correct Answer: Agree
Correct Answer: degradation of energy
Correct Answer: impossible
Correct Answer: constant pressure
Correct Answer: Gay-Lussac law
Correct Answer: all of these
Correct Answer: isentropically
Correct Answer:
Correct Answer: Disagree
Correct Answer: No
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