Discussion
Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines Comments
- Question
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as
Options- A. regenerative heating
- B. reheating of steam
- C. bleeding
- D. none of these
- Correct Answer
- bleeding
- 1. In pressure compounding of an impulse turbine, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided equally among all the nozzle rings.
Options- A. Agree
- B. Disagree Discuss
- 2. The expansion of steam, as it flows over the blades in reaction turbine, represents
Options- A. isothermal process
- B. isentropic process
- C. throttling process
- D. free-expansion process Discuss
- 3. In an impulse reaction turbine, the pressure drops gradually and continuously over
Options- A. fixed blades
- B. moving blades
- C. both fixed and moving blades
- D. none of these Discuss
- 4. When the inlet pressure of steam is equal to the exit pressure, then
Options- A. there is a pressure drop in the nozzle
- B. fluid flows through the nozzle
- C. pressure drops and fluid flows through the nozzle
- D. there is no pressure drop and fluid does not flow through the nozzle Discuss
- 5. The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.
Options- A. same
- B. less
- C. more Discuss
- 6. An impulse turbine as compared to a reaction turbine, for a given power has __________ row of blades.
Options- A. equal
- B. less
- C. more Discuss
- 7. The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.
Options- A. more
- B. less Discuss
- 8. The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
Options- A. 10 to 15%
- B. 15 to 20%
- C. 20 to 30%
- D. 30 to 40% Discuss
- 9. The velocity of whirl at outlet for an axial discharge turbine is
Options- A. minimum
- B. maximum
- C. zero Discuss
- 10. In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is __________ the relative velocity of steam at inlet tip of the blade.
Options- A. equal to
- B. less than
- C. greater than Discuss
Steam Nozzles and Turbines problems
Search Results
Correct Answer: Agree
Correct Answer: isentropic process
Correct Answer: both fixed and moving blades
Correct Answer: there is no pressure drop and fluid does not flow through the nozzle
Correct Answer: more
Correct Answer: more
Correct Answer: less
Correct Answer: 10 to 15%
Correct Answer: zero
Correct Answer: equal to
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