Discussion
Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines Comments
- Question
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
- Correct Answer
- blading efficiency
- 1. The flow through a nozzle is regarded as
Options- A. constant volume flow
- B. constant pressure flow
- C. isothermal flow
- D. isentropic flow Discuss
- 2. The critical pressure ratio (p2/p1) is given by
Options- A.
- B.
- C.
- D.
Discuss
- 3. The ratio of the useful heat drop to the isentropic heat drop is called
Options- A. condenser efficiency
- B. nozzle efficiency
- C. boiler efficiency
- D. vacuum efficiency Discuss
- 4. A regenerative steam cycle renders
Options- A. increased work output per unit mass of steam
- B. decreased work output per unit mass of steam
- C. increased thermal efficiency
- D. decreased work output per unit mass of steam as well as increased thermal efficiency Discuss
- 5. The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
Options- A. remains constant
- B. decreases
- C. increases Discuss
- 6. The turbine blades are
Options- A. straight
- B. circular
- C. curved Discuss
- 7. 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
- 8. 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 Discuss
- 9. 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
- 10. 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
Steam Nozzles and Turbines problems
Search Results
Correct Answer: isentropic flow
Correct Answer:
Correct Answer: nozzle efficiency
Correct Answer: decreased work output per unit mass of steam as well as increased thermal efficiency
Correct Answer: remains constant
Correct Answer: curved
Correct Answer: partly as an impulsive force and partly as a reaction force
Correct Answer: decreases
Correct Answer: all of these
Correct Answer: single rotor impulse turbine
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