Thermodynamics problems
- 1. The gas constant (R) is equal to the __________ of two specific heats.
Options- A. sum
- B. difference
- C. product
- D. ratio Discuss
Correct Answer: difference
- 2. Which of the following is the correct statement of the second law of thermodynamics?
Options- A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
- B. It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
- C. There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
- D. all of the above Discuss
Correct Answer: all of the above
- 3. During which of the following process does heat rejection takes place in Carnot cycle?
Options- A. Isothermal expansion
- B. Isentropic expansion
- C. Isothermal compression
- D. Isentropic compression Discuss
Correct Answer: Isothermal compression
- 4. Hydrogen is the __________ substance.
Options- A. lightest
- B. heaviest Discuss
Correct Answer: lightest
- 5. Liquid fuels have higher calorific value than solid fuels.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 6. The isothermal and isentropic processes are reversible non-flow processes.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 7. Which of the following gas has a minimum molecular mass?
Options- A. Oxygen
- B. Nitrogen
- C. Hydrogen
- D. Methane Discuss
Correct Answer: Hydrogen
- 8. Ericsson cycle consists of two constant pressure and two isothermal processes.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 9. Those substances which have so far not been resolved by any means into other substances of simpler form are called
Options- A. elements
- B. compounds
- C. atoms
- D. molecules Discuss
Correct Answer: elements
- 10. Which is the incorrect statement about Carnot cycle?
Options- A. It is used as the alternate standard of comparison of all heat engines.
- B. All the heat engines are based on Carnot cycle.
- C. It provides concept of maximising work output between the two temperature limits.
- D. all of the above Discuss
Correct Answer: All the heat engines are based on Carnot cycle.
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