Discussion
Home ‣ Mechanical Engineering ‣ Thermodynamics Comments
- Question
Relation between cp and cv is given by (where cp = Specific heat at constant pressure, cv = Specific heat at constant volume, ? = cp/cv, known as adiabatic index, and R = Gas constant)
Options- A.
- B. cp - cv = R
- C.
- D. Both (B) and (C)
- Correct Answer
- Both (B) and (C)
- 1. The amount of heat obtained by the complete combustion of 1 kg of a fuel when the products of its combustion are cooled down to the temperature of supplied air is called __________ calorific value offuel.
Options- A. higher
- B. lower Discuss
- 2. Which of the following statement is correct according to Clausis statement of second law off thermodynamics?
Options- A. It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
- B. 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.
- C. It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
- D. none of the above Discuss
- 3. A good fuel should have __________ ignition point.
Options- A. high
- B. low Discuss
- 4. When the finely ground coal is moulded under pressure with or without a binding material, the resulting fuel is called briquetted coal.
Options- A. Yes
- B. No Discuss
- 5. The isothermal and adiabatic processes are regarded as
Options- A. reversible process
- B. irreversible process
- C. reversible or irreversible process
- D. none of these Discuss
- 6. The elements are made up of minute and chemically invisible particles as atoms.
Options- A. True
- B. False Discuss
- 7. In a steady flow process, the ratio of
Options- A. heat transfer is constant
- B. work transfer is constant
- C. mass flow at inlet and outlet is same
- D. all of these Discuss
- 8. The __________ is obtained when carbonisation of coal is carried out at 500° to 700° C.
Options- A. soft coke
- B. hard coke
- C. pulverised coal
- D. bituminous coal Discuss
- 9. The property of the system, whose value for the entire system is equal to the sum of their values for the individual parts of the system is called extensive property
Options- A. Yes
- B. No Discuss
- 10. The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)
Options- A. r? - 1
- B. 1 - r? - 1
- C.
- D.
Discuss
Thermodynamics problems
Search Results
Correct Answer: higher
Correct Answer: 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.
Correct Answer: low
Correct Answer: Yes
Correct Answer: reversible process
Correct Answer: True
Correct Answer: all of these
Correct Answer: soft coke
Correct Answer: Yes
Correct Answer:
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