Discussion
Home ‣ Mechanical Engineering ‣ Thermodynamics Comments
- Question
The air standard efficiency of an Otto cycle is given by (where r = Compression ratio, and ? = Ratio of specific heats)
Options- A. 1 - r? - 1
- B. 1 + r? - 1
- C.
- D.
- Correct Answer
-
- 1. First law of thermodynamics deals with
Options- A. conservation of heat
- B. conservation of momentum
- C. conservation of mass
- D. conservation of energy Discuss
- 2. The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is
Options- A. 0.086
- B. 1.086
- C. 3.086
- D. 4.086 Discuss
- 3. A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
Options- A. same
- B. lower
- C. higher Discuss
- 4. The mass of flue gas per kg of fuel is the ratio of the
Options- A. mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel
- B. mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas
- C. mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel
- D. mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas Discuss
- 5. The efficiency of the dual combustion cycle for the same compression ratio, is __________ Diesel cycle.
Options- A. greater than
- B. less than
- C. equal to Discuss
- 6. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
Options- A. Correct
- B. Incorrect Discuss
- 7. When gas is heated at constant pressure, the heat supplied is utilised in
Options- A. increasing the internal energy of gas
- B. doing some external work
- C. increasing the internal energy of gas and also for doing some external work
- D. none of the above Discuss
- 8. Both the Ericsson and Joule's cycle have two constant pressure processes.
Options- A. True
- B. False Discuss
- 9. The atomic mass of sulphur is
Options- A. 12
- B. 14
- C. 16
- D. 32 Discuss
- 10. When the gas is heated at constant pressure, the heat supplied
Options- A. increases the internal energy of the gas
- B. increases the temperature of the gas
- C. does some external work during expansion
- D. Both (B) and (C) Discuss
Thermodynamics problems
Search Results
Correct Answer: conservation of energy
Correct Answer: 1.086
Correct Answer: higher
Correct Answer: mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel
Correct Answer: greater than
Correct Answer: Correct
Correct Answer: increasing the internal energy of gas and also for doing some external work
Correct Answer: True
Correct Answer: 32
Correct Answer: Both (B) and (C)
Comments
There are no comments.More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.