Discussion
Home ‣ Mechanical Engineering ‣ Steam Nozzles and Turbines Comments
- Question
The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
Options- A. Agree
- B. Disagree
- Correct Answer
- Agree
- 1. The maximum efficiency of a reaction turbine is
Options- A.
- B.
- C.
- D.
Discuss
- 2. Multi-stage steam turbines are of the
Options- A. velocity compounded type
- B. reaction type
- C. pressure compounded type
- D. all of these Discuss
- 3. The critical pressure ratio for initially wet steam is
Options- A. 0.546
- B. 0.577
- C. 0.582
- D. 0.601 Discuss
- 4. The critical pressure gives the velocity of steam at the throat
Options- A. equal to the velocity of sound
- B. less than the velocity of sound
- C. more than the velocity of sound
- D. none of these Discuss
- 5. The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
Options- A. 0.4
- B. 0.56
- C. 0.67
- D. 1.67 Discuss
- 6. A binary vapour plant consists of
Options- A. steam turbine
- B. steam condenser
- C. mercury boiler
- D. all of these Discuss
- 7. The Parsons' reaction turbine has
Options- A. only moving blades
- B. only fixed blades
- C. identical fixed and moving blades
- D. fixed and moving blades of different shape Discuss
- 8. A turbine is said to have an axial discharge when the steam leaves the blade tip at __________ to the direction of the blade motion.
Options- A. 60°
- B. 90°
- C. 180°
- D. 270° Discuss
- 9. The turbine, in which the general direction of the steam flow is parallel to the turbine axis, is called axial flow turbines
Options- A. True
- B. False Discuss
- 10. In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, p2) will be
Options- A. 3.3 bar
- B. 5.46 bar
- C. 8.2 bar
- D. 9.9 bar Discuss
Steam Nozzles and Turbines problems
Search Results
Correct Answer:
Correct Answer: all of these
Correct Answer: 0.582
Correct Answer: equal to the velocity of sound
Correct Answer: 0.4
Correct Answer: all of these
Correct Answer: identical fixed and moving blades
Correct Answer: 90°
Correct Answer: True
Correct Answer: 5.46 bar
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