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Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines Comments
- Question
The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop
Options- A. remains the same
- B. increases
- C. decreases
- D. is unpredictable
- Correct Answer
- decreases
- 1. The impulse reaction turbine has its driving force
Options- A. as an impulsive force
- B. as a reaction force
- C. partly as an impulsive force and partly as a reaction force
- D. none of the above Discuss
- 2. The turbine blades are
Options- A. straight
- B. circular
- C. curved Discuss
- 3. The ratio of the workdone on the blades to the energy supplied to the blades, is called
Options- A. blading efficiency
- B. nozzle efficiency
- C. gross or stage efficiency
- D. mechanical efficiency Discuss
- 4. The flow through a nozzle is regarded as
Options- A. constant volume flow
- B. constant pressure flow
- C. isothermal flow
- D. isentropic flow Discuss
- 5. The critical pressure ratio (p2/p1) is given by
Options- A.
- B.
- C.
- D.
Discuss
- 6. Steam turbines are used for
Options- A. large marine propulsion
- B. electric power generation
- C. direct drive of fans, compressors, pumps
- D. all of these Discuss
- 7. De-Laval turbine is a
Options- A. single rotor impulse turbine
- B. multi-rotor impulse turbine
- C. impulse reaction turbine
- D. none of these Discuss
- 8. The steam leaves the nozzle at a
Options- A. high pressure and a low velocity
- B. high pressure and a high velocity
- C. low pressure and a low velocity
- D. low pressure and a high velocity Discuss
- 9. Parson's turbine is a
Options- A. simple impulse turbine
- B. simple reaction turbine
- C. impulse-reaction turbine
- D. none of these Discuss
- 10. In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.
Options- A. Correct
- B. Incorrect Discuss
Steam Nozzles and Turbines problems
Search Results
Correct Answer: partly as an impulsive force and partly as a reaction force
Correct Answer: curved
Correct Answer: blading efficiency
Correct Answer: isentropic flow
Correct Answer:
Correct Answer: all of these
Correct Answer: single rotor impulse turbine
Correct Answer: low pressure and a high velocity
Correct Answer: simple reaction turbine
Correct Answer: Correct
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