Thermodynamics problems
- 1. The state of a substance whose evaporation from its liquid state is complete, is known as
Options- A. vapour
- B. perfect gas
- C. air
- D. steam Discuss
Correct Answer: perfect gas
- 2. The ratio of molar specific heats for monoatomic gas is
Options- A. 1
- B. 1.4
- C. 1.67
- D. 1.87 Discuss
Correct Answer: 1.67
- 3. The state of a substance whose evaporation from its liquid state is partial, is known as steam.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Disagree
- 4. The main cause for the irreversibility is
Options- A. mechanical and fluid friction
- B. unrestricted expansion
- C. heat transfer with a finite temperature difference
- D. all of the above Discuss
Correct Answer: all of the above
- 5. According to kinetic theory of gases, the kinetic energy of translation of a molecule is proportional to
Options- A. T
- B. T
- C. 1/T
- D. 1/T Discuss
Correct Answer: T
- 6. In an irreversible process, there is a
Options- A. loss of heat
- B. no loss of heat
- C. gain of heat
- D. no gain of heat Discuss
Correct Answer: loss of heat
- 7. When a gas is heated at constant volume
Options- A. its temperature will increase
- B. its pressure will increase
- C. both temperature and pressure will increase
- D. neither temperature nor pressure will increase Discuss
Correct Answer: both temperature and pressure will increase
- 8. The efficiency of Ericsson cycle is __________ Carnot cycle.
Options- A. greater than
- B. less than
- C. equal to Discuss
Correct Answer: equal to
- 9. Which of the following has the highest calorific value?
Options- A. Peat
- B. Lignite
- C. Bituminous coal
- D. Anthracite coal Discuss
Correct Answer: Anthracite coal
- 10. The value of cp/cv for air is
Options- A. 1
- B. 1.4
- C. 1.8
- D. 23 Discuss
Correct Answer: 1.4
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