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- Question
The behaviour of super-heated vapour is similar to that of
Options- A. perfect gas
- B. air
- C. steam
- D. ordinary gas
- Correct Answer
- perfect gas
- 1. The entropy of the universe is continually on the increase.
Options- A. Correct
- B. Incorrect Discuss
- 2. It is __________ to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
Options- A. possible
- B. impossible Discuss
- 3. Diesel cycle consists of __________ processes.
Options- A. two constant volume and two isentropic
- B. two constant pressure and two isentropic
- C. two constant volume and two isothermal
- D. one constant pressure, one constant volume and two isentropic Discuss
- 4. For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
Options- A. Dual cycle, Diesel cycle, Otto cycle
- B. Otto cycle, Diesel cycle, Dual cycle
- C. Dual cycle, Otto cycle, Diesel cycle
- D. Diesel cycle, Otto cycle, Dual cycle Discuss
- 5. For the same maximum pressure and temperature,
Options- A. Otto cycle is more efficient than Diesel cycle
- B. Diesel cycle is more efficient than Otto cycle
- C. Dual cycle is more efficient than Otto and Diesel cycles
- D. Dual cycle is less efficient than Otto and Diesel cycles Discuss
- 6. When coal is first dried and then crushed to a fine powder by pulverising machine, the resulting fuel is called
Options- A. wood charcoal
- B. bituminous coal
- C. briquetted coal
- D. none of these Discuss
- 7. A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called
Options- A. isothermal process
- B. hyperbolic process
- C. adiabatic process
- D. polytropic process Discuss
- 8. The amount of heat generated per kg of fuel is known as
Options- A. calorific value
- B. heat energy
- C. lower calorific value
- D. higher calorific value Discuss
- 9. Wood charcoal is produced by heating the wood at 100°C.
Options- A. Yes
- B. No Discuss
- 10. Which of the following is the correct statement?
Options- A. All the reversible engines have the same efficiency.
- B. All the reversible and irreversible engines have the same efficiency.
- C. Irreversible engines have maximum efficiency.
- D. All engines are designed as reversible in order to obtain maximum efficiency. Discuss
Thermodynamics problems
Search Results
Correct Answer: Correct
Correct Answer: impossible
Correct Answer: one constant pressure, one constant volume and two isentropic
Correct Answer: Dual cycle, Diesel cycle, Otto cycle
Correct Answer: Diesel cycle is more efficient than Otto cycle
Correct Answer: none of these
Correct Answer: hyperbolic process
Correct Answer: calorific value
Correct Answer: No
Correct Answer: Irreversible engines have maximum efficiency.
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