Discussion
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- Question
The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to
Options- A. 0
- B. 1
- C. ?
- D. ?
- Correct Answer
- 1
- 1. One molecule of oxygen consists of __________ atoms of oxygen.
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
- 2. A triatomic molecule consists of __________ atoms.
Options- A. one
- B. two
- C. three
- D. four Discuss
- 3. The change of entropy, when heat is removed from the gas, is negative.
Options- A. Yes
- B. No Discuss
- 4. The heat and mechanical energies are mutually convertible. This statement was established by
Options- A. Boyle
- B. Charles
- C. Joule
- D. none of these Discuss
- 5. Mond gas is obtained by
Options- A. partial combusion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
- B. carbonisation of bituminous coal
- C. passing steam over incandescent coke
- D. passing air and a large amount of steam over waste coal at about 650°C Discuss
- 6. For the same compression ratio, the efficiency of dual combustion cycle is
Options- A. greater than Diesel cycle and less than Otto cycle
- B. less than Diesel cycle and greater than Otto cycle
- C. greater than Diesel cycle
- D. less than Diesel cycle Discuss
- 7. The gas turbine cycle with regenerator improves
Options- A. thermal efficiency
- B. work ratio
- C. avoids pollution
- D. none of these Discuss
- 8. Which of the following is an intensive property of a thermodynamic system?
Options- A. Volume
- B. Temperature
- C. Mass
- D. Energy Discuss
- 9. The conditions of temperature and pressure at 0°C (273K) and 760 mm of Hg pressure are termed as __________ temperature and pressure.
Options- A. normal
- B. standard Discuss
- 10. Coke is produced
Options- A. when coal is first dried and then crushed to a fine powder by pulverising machine
- B. from the finely ground coal by moulding under pressure with or without a binding material
- C. when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
- D. by heating wood with a limited supply of air to a temperature not less than 280°C Discuss
Thermodynamics problems
Search Results
Correct Answer: 2
Correct Answer: three
Correct Answer: Yes
Correct Answer: Joule
Correct Answer: passing air and a large amount of steam over waste coal at about 650°C
Correct Answer: greater than Diesel cycle and less than Otto cycle
Correct Answer: thermal efficiency
Correct Answer: Temperature
Correct Answer: standard
Correct Answer: when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
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