Thermodynamics problems
- 1. The hyperbolic pocess is governed by
Options- A. Boyle's law
- B. Charles' law
- C. Gay-Lussac law
- D. Avogadro's law Discuss
Correct Answer: Boyle's law
- 2. Liquid fuels have lower efficiency than solid fuels.
Options- A. True
- B. False Discuss
Correct Answer: False
- 3. The greater the pressure difference in throttling, the lesser is the irreversibility.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 4. The efficiency of Joule cycle is
Options- A. greater than Carnot cycle
- B. less than Carnot cycle
- C. equal to Carnot cycle
- D. none of these Discuss
Correct Answer: less than Carnot cycle
- 5. The fuel mostly used in steam boilers is
Options- A. brown coal
- B. peat
- C. coking bituminous coal
- D. non-coking bituminous coal Discuss
Correct Answer: non-coking bituminous coal
- 6. The efficiency of a dual combustion cycle __________ upon cut-off ratio.
Options- A. depends
- B. does not depend Discuss
Correct Answer: depends
- 7. The blast furnace gas is a by-product in the production of pig iron in the blast furnace.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 8. Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
Options- A. combustion is at constant volume
- B. expansion and compression are isentropic
- C. maximum temperature is higher
- D. heat rejection is lower Discuss
Correct Answer: heat rejection is lower
- 9. According to Avogadro's law
Options- A. the product of the gas constant and the molecular mass of an ideal gas is constant
- B. the sum of partial pressure of the mixture of two gases is sum of the two
- C. equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
- D. all of the above Discuss
Correct Answer: equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
- 10. One kg of carbon produces __________ kg of carbon dioxide.
Options- A. 3/7
- B. 7/3
- C. 11/3
- D. 3/11 Discuss
Correct Answer: 11/3
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