Thermodynamics problems
- 1. 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 Discuss
Correct Answer: throttling process
- 2. 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
Correct Answer: pvn = C
- 3. 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
Correct Answer: all of the above
- 4. Reversed Joule cycle is known as
Options- A. Carnot cycle
- B. Bell-Coleman cycle
- C. Rankine cycle
- D. Stirling cycle Discuss
Correct Answer: Bell-Coleman cycle
- 5. The workdone in a free expansion process is zero.
Options- A. True
- B. False Discuss
Correct Answer: True
- 6. 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
Correct Answer: 65° to 220°C
- 7. The heat energy stored in the gas and used for raising the temperature of the gas is known as
Options- A. external energy
- B. internal energy
- C. kinetic energy
- D. molecular energy Discuss
Correct Answer: internal energy
- 8. In a reversible adiabatic process, the ratio of T1/T2 is equal to
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 9. The atomic mass of nitrogen is __________ oxygen.
Options- A. equal to
- B. less than
- C. more than Discuss
Correct Answer: less than
- 10. In S. I. units, the value of the universal gas constant is
Options- A. 8.314 J/kg mole-K
- B. 83.14 J/kgmole-K
- C. 831.4 J/kgmole-K
- D. 8314 J/kgmole-K Discuss
Correct Answer: 8314 J/kgmole-K
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