Thermodynamics problems
- 1. The gas constant (R) is equal to the
Options- A. sum of two specific heats
- B. difference of two specific heats
- C. product of two specific heats
- D. ratio of two specific heats Discuss
Correct Answer: difference of two specific heats
- 2. Which of the following gas has the highest calorific value?
Options- A. Coal gas
- B. Producer gas
- C. Mond gas
- D. Blast furnace gas Discuss
Correct Answer: Coal gas
- 3. One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.
Options- A. 9/7
- B. 11/7
- C. 7/4
- D. 11/4 Discuss
Correct Answer: 9/7
- 4. As per Charles' law, the volume of a given mass of a perfect gas varies __________ as its absolute temperature, when the absolute pressure remains constant.
Options- A. directly
- B. indirectly Discuss
Correct Answer: directly
- 5. The fuel mostly used in cement industry and in metallurgical processes is
Options- A. wood charcoal
- B. bituminous coke
- C. pulverised coal
- D. coke Discuss
Correct Answer: pulverised coal
- 6. One kg of carbon monoxide requires 4/7 kg of oxygen and produces
Options- A. 11/3 kg of carbon dioxide gas
- B. 7/3 kg of carbon monoxide gas
- C. 11/7 kg of carbon dioxide gas
- D. 8/3 kg of carbon monoxide gas Discuss
Correct Answer: 11/7 kg of carbon dioxide gas
- 7. The lower calorific value of fuel may be obtained by adding the heat of steam formed during combustion to the higher calorific value.
Options- A. Yes
- B. No Discuss
Correct Answer: No
- 8. The oxygen atom is __________ times heavier than the hydrogen atom.
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
Correct Answer: 16
- 9. The isothermal and adiabatic processes are regarded as
Options- A. reversible process
- B. irreversible process
- C. reversible or irreversible process
- D. none of these Discuss
Correct Answer: reversible process
- 10. When the finely ground coal is moulded under pressure with or without a binding material, the resulting fuel is called briquetted coal.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
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