Thermodynamics problems
- 1. The atomic mass of oxygen is
Options- A. 12
- B. 14
- C. 16
- D. 32 Discuss
Correct Answer: 16
- 2. Coal gas is obtained by mixing coal and gas at ambient conditions.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 3. The compression ratio for petrol engines is
Options- A. 3 to 6
- B. 5 to 8
- C. 15 to 20
- D. 20 to 30 Discuss
Correct Answer: 5 to 8
- 4. If the value of n = 0 in the equation pvn = C, then the process is called
Options- A. constant volume process
- B. adiabatic process
- C. constant pressure process
- D. isothermal process Discuss
Correct Answer: constant pressure process
- 5. The efficiency of Diesel cycle increases with
Options- A. decrease in cut-off
- B. increase in cut-off
- C. constant cut-off
- D. none of these Discuss
Correct Answer: decrease in cut-off
- 6. One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.
Options- A. 8/3
- B. 11/3
- C. 11/7
- D. 7/3 Discuss
Correct Answer: 7/3
- 7. The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by
Options- A. Boyle's law
- B. Charles' law
- C. Gay-Lussac law
- D. all of these Discuss
Correct Answer: all of these
- 8. The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called
Options- A. specific heat at constant volume
- B. specific heat at constant pressure
- C. kilo Joule
- D. none of these Discuss
Correct Answer: specific heat at constant volume
- 9. Stirling and Ericsson cycles are
Options- A. reversible cycles
- B. irreversible cycles
- C. semi-reversible cycles
- D. quasi-static cycles Discuss
Correct Answer: reversible cycles
- 10. The most probable velocity of the gas molecules is given by
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
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