Discussion
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- Question
The change of entropy, when heat is removed from the gas, is negative.
Options- A. Yes
- B. No
- Correct Answer
- Yes
- 1. 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
- 2. 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
- 3. The area under the temperature-entropy curve (i. e. T - s curve) of any thermodynamic process represents the workdone during the process.
Options- A. Agree
- B. Disagree Discuss
- 4. The root mean square velocity of the gas molecules is given by (where k = Boltzmann's constant, T = Absolute temperature, and m = Mass of one molecule of a gas)
Options- A.
- B.
- C.
- D.
Discuss
- 5. The volumetric or molar specific heat at constant pressure is the product of
Options- A. molecular mass of the gas and the specific heat at constant volume
- B. atomic mass of the gas and the gas constant
- C. molecular mass of the gas and the gas constant
- D. none of the above Discuss
- 6. A triatomic molecule consists of __________ atoms.
Options- A. one
- B. two
- C. three
- D. four Discuss
- 7. One molecule of oxygen consists of __________ atoms of oxygen.
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
- 8. 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. ? Discuss
- 9. 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
- 10. The gas turbine cycle with regenerator improves
Options- A. thermal efficiency
- B. work ratio
- C. avoids pollution
- D. none of these Discuss
Thermodynamics problems
Search Results
Correct Answer: Joule
Correct Answer: passing air and a large amount of steam over waste coal at about 650°C
Correct Answer: Disagree
Correct Answer:
Correct Answer: none of the above
Correct Answer: three
Correct Answer: 2
Correct Answer: 1
Correct Answer: greater than Diesel cycle and less than Otto cycle
Correct Answer: thermal efficiency
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