Discussion
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- Question
The compression ratio is the ratio of
Options- A. swept volume to total volume
- B. total volume to swept volume
- C. swept volume to clearance volume
- D. total volume to clearance volume
- Correct Answer
- total volume to clearance volume
- 1. The numerical value of the thermal capacity and the water equivalent of the substance are the same.
Options- A. Agree
- B. Disagree Discuss
- 2. The condition for the reversibility of a cycle is
Options- A. the pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
- B. all the processes, taking place in the cycle of operation, must be extremely slow
- C. the working parts of the engine must be friction free
- D. all of the above Discuss
- 3. For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.
Options- A. greater than
- B. less than
- C. equal to Discuss
- 4. In an isolated system, neither the heat and work nor the, mass of the working substance crosses the boundary of the system.
Options- A. True
- B. False Discuss
- 5. According to First law of thermodynamics,
Options- A. total internal energy of a system during a process remains constant
- B. total energy of a system remains constant
- C. workdone by a system is equal to the heat transferred by the system
- D. internal energy, enthalpy and entropy during a process remains constant Discuss
- 6. The natural solid fuel is
Options- A. wood
- B. coke
- C. anthracite coal
- D. pulverised coal Discuss
- 7. An open cycle gas turbine works on
Options- A. Carnot cycle
- B. Otto cycle
- C. Joule's cycle
- D. Stirling cycle Discuss
- 8. Stirling cycle consists of
Options- A. two constant volume and two isentropic processes
- B. two constant volume and two isothermal processes
- C. two constant pressure and two isothermal processes
- D. one constant volume, one constant pressure and two isentropic processes Discuss
- 9. According to kinetic theory of gases, the velocity of molecules __________ with the increase in temperature.
Options- A. remains constant
- B. increases
- C. decreases Discuss
- 10. When a fluid is allowed to expand suddenly into a vaccum chamber through an orifice of large dimensions, the process is known as free expansion process.
Options- A. True
- B. False Discuss
Thermodynamics problems
Search Results
Correct Answer: Agree
Correct Answer: all of the above
Correct Answer: less than
Correct Answer: True
Correct Answer: total energy of a system remains constant
Correct Answer: wood
Correct Answer: Joule's cycle
Correct Answer: two constant volume and two isothermal processes
Correct Answer: increases
Correct Answer: True
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