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- Question
Carbonisation of coal consists of
Options- A. drying and crushing the coal to a fine powder
- B. moulding the finely ground coal under pressure with or without a binding material
- C. heating the wood with a limited supply of air to temperature not less than 280°C
- D. none of the above
- Correct Answer
- none of the above
- 1. Which of the following has the minimum atomic mass?
Options- A. Oxygen
- B. Sulphur
- C. Nitrogen
- D. Carbon Discuss
- 2. One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas.
Options- A. All
- B. 4/7
- C. 11/4
- D. 9/7 Discuss
- 3. Which of the following is the lightest and most volatile liquid fuel?
Options- A. Gasoline
- B. Kerosene
- C. Fuel oil Discuss
- 4. There is no change in internal energy in an isothermal process.
Options- A. Correct
- B. Incorrect Discuss
- 5. Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?
Options- A.
- B.
- C.
- D.
Discuss
- 6. According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure.
Options- A. equal to
- B. directly proportional to
- C. inversely proportional to Discuss
- 7. The entropy __________ in an irreversible cyclic process.
Options- A. remains constant
- B. decreases
- C. increases Discuss
- 8. An adiabatic process is one in which
Options- A. no heat enters or leaves the gas
- B. the temperature of the gas changes
- C. the change in internal energy is equal to the mechanical workdone
- D. all of the above Discuss
- 9. The value of 1 mm of Hg is equal to
Options- A. 1.333 N/m2
- B. 13.33 N/m2
- C. 133.3 N/m2
- D. 1333 N/m2 Discuss
- 10. The efficiency of Diesel cycle approaches to Otto cycle efficiency when
Options- A. cut-off is increased
- B. cut-off is decreased
- C. cut-off is zero
- D. cut-off is constant Discuss
Thermodynamics problems
Search Results
Correct Answer: Carbon
Correct Answer: 4/7
Correct Answer: Gasoline
Correct Answer: Correct
Correct Answer:
Correct Answer: directly proportional to
Correct Answer: increases
Correct Answer: all of the above
Correct Answer: 133.3 N/m2
Correct Answer: cut-off is zero
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