Discussion
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- Question
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
- Correct Answer
- all of the above
- 1. The gas constant (R) is equal to the __________ of two specific heats.
Options- A. sum
- B. difference
- C. product
- D. ratio Discuss
- 2. The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
Options- A.
- B.
- C.
- D.
Discuss
- 3. Kelvin-Planck's law deals with
Options- A. conservation of work
- B. conservation of heat
- C. conversion of heat into work
- D. conversion of work into heat Discuss
- 4. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
Options- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Kelvin Planck's law Discuss
- 5. The dual combustion cycle consists of one constant pressure, two constant volume and two isentropic processes.
Options- A. Agree
- B. Disagree Discuss
- 6. 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
- 7. Hydrogen is the __________ substance.
Options- A. lightest
- B. heaviest Discuss
- 8. Liquid fuels have higher calorific value than solid fuels.
Options- A. Yes
- B. No Discuss
- 9. The isothermal and isentropic processes are reversible non-flow processes.
Options- A. Agree
- B. Disagree Discuss
- 10. Which of the following gas has a minimum molecular mass?
Options- A. Oxygen
- B. Nitrogen
- C. Hydrogen
- D. Methane Discuss
Thermodynamics problems
Search Results
Correct Answer: difference
Correct Answer:
Correct Answer: conversion of heat into work
Correct Answer: Zeroth law of thermodynamics
Correct Answer: Agree
Correct Answer: Isothermal compression
Correct Answer: lightest
Correct Answer: Yes
Correct Answer: Agree
Correct Answer: Hydrogen
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