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- Question
When a perfect gas is expanded through an aperture of minute dimensions, the process is known as
Options- A. isothermal process
- B. adiabatic process
- C. free expansion process
- D. throttling process
- Correct Answer
- throttling process
- 1. The efficiency of Diesel cycle increases with increase in cut-off.
Options- A. Yes
- B. No Discuss
- 2. The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)
Options- A. Ru x T
- B. 1.5 Ru x T
- C. 2 Ru x T
- D. 3 Ru x T Discuss
- 3. The atomic mass of an element is the number of times the atom of that element is heavier than the hydrogen atom.
Options- A. True
- B. False Discuss
- 4. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
Options- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Kinetic theory of gases Discuss
- 5. Steam coal is a
Options- A. pulverised coal
- B. brown coal
- C. coking bituminous coal
- D. non-coking bituminous coal Discuss
- 6. The general law for the expansion or compression of gases, is
Options- A. pv = C
- B. pv = m R T
- C. pvn = C
- D. pv? = C Discuss
- 7. Which of the following statement is correct?
Options- A. The heat and work are boundary phenomena
- B. The heat and work represent the energy crossing the boundary of the system
- C. The heat and work are path functions
- D. all of the above Discuss
- 8. Reversed Joule cycle is known as
Options- A. Carnot cycle
- B. Bell-Coleman cycle
- C. Rankine cycle
- D. Stirling cycle Discuss
- 9. The workdone in a free expansion process is zero.
Options- A. True
- B. False Discuss
- 10. Petrol is distilled at
Options- A. 65° to 220°C
- B. 220° to 345°C
- C. 345° to 470°C
- D. 470° to 550°C Discuss
Thermodynamics problems
Search Results
Correct Answer: No
Correct Answer: 1.5 Ru x T
Correct Answer: True
Correct Answer: First law of thermodynamics
Correct Answer: non-coking bituminous coal
Correct Answer: pvn = C
Correct Answer: all of the above
Correct Answer: Bell-Coleman cycle
Correct Answer: True
Correct Answer: 65° to 220°C
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