Discussion
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- Question
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
- Correct Answer
- 1.086
- 1. A close cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
Options- A. same
- B. lower
- C. higher Discuss
- 2. 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
- 3. 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
- 4. If in the equation pvn = C, the value of n = ? , then the process is called
Options- A. constant volume process
- B. adiabatic process
- C. constant pressure process
- D. isothermal process Discuss
- 5. High air-fuel ratio in gas turbines
Options- A. increases power output
- B. improves thermal efficiency
- C. reduces exhaust temperature
- D. do not damage turbine blades Discuss
- 6. First law of thermodynamics deals with
Options- A. conservation of heat
- B. conservation of momentum
- C. conservation of mass
- D. conservation of energy Discuss
- 7. 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.
Discuss
- 8. 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
- 9. 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
- 10. Both the Ericsson and Joule's cycle have two constant pressure processes.
Options- A. True
- B. False Discuss
Thermodynamics problems
Search Results
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: constant volume process
Correct Answer: reduces exhaust temperature
Correct Answer: conservation of energy
Correct Answer:
Correct Answer: Correct
Correct Answer: increasing the internal energy of gas and also for doing some external work
Correct Answer: True
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