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MCQs

Total Questions : 1935 | Page 96 of 194 pages
Question 951.
 
The efficiency
of a pressure-velocity compounded impulse turbine is __________ as
compared to pressure compounded impulse turbine.
  1.    same
  2.    less
  3.    more
 Discuss Question
Answer: Option B. -> less


Question 952.
The effect of supersaturation is that the
  1.    mass of the steam discharged increases
  2.    entropy and specific volume of the steam increases
  3.    exit velocity of steam reduces
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 953.

The critical pressure ratio for gases is


  1.    0.528
  2.    0.546
  3.    0.577
  4.    0.582
 Discuss Question
Answer: Option A. -> 0.528


Question 954.

 
The velocity of steam, in reaction turbines, is increased in the fixed blades as well as in moving blades.


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True


Question 955.


The critical pressure ratio for initially dry saturated steam is


  1.    0.546
  2.    0.577
  3.    0.582
  4.    0.601
 Discuss Question
Answer: Option B. -> 0.577


Question 956.


The velocity of steam at throat of the nozzle is __________ the velocity of sound.


  1.    equal to
  2.    less than
  3.    more than
 Discuss Question
Answer: Option A. -> equal to


Question 957.

 
The discharge through a nozzle is maximum for a certain value of exit pressure. This pressure is known as critical pressure.


  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 958.


Curtis turbine is a


  1.    simple reaction turbine
  2.    velocity compounded turbine
  3.    pressure compounded turbine
  4.    pressure-velocity compounded turbine
 Discuss Question
Answer: Option D. -> pressure-velocity compounded turbine


Question 959.

 
In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True


Question 960.


Rateau turbine is


  1.    simple reaction turbine
  2.    velocity compounded turbine
  3.    pressure compounded turbine
  4.    pressure-velocity compounded turbine
 Discuss Question
Answer: Option C. -> pressure compounded turbine


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