Lakshya Education MCQs

Question: The variation of steam pressure in the nozzle depends upon
Options:
A. Velocity of steam
B. Specific volume of steam
C. Dryness fraction of steam
D. All of these
Answer: Option D

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More Questions on This Topic :

Question 1. The maximum efficiency of a de-laval turbine is (where α = nozzle angle)
  1.     sin²α
  2.     cos²α
  3.     tan²α
  4.     cot²α
Answer: Option B
Question 2. The efficiency of an impulse turbine is maximum when (where vb = blade speed, v = absolute velocity of steam entering the blade, and α = nozzle angle)
  1.     Vb = 0.5 V cosα
  2.     Vb = V cosα
  3.     Vb = 0.5 V² cosα
  4.     Vb = V² cosα
Answer: Option A
Question 3. The variation of steam pressure in the nozzle depends upon
  1.     Velocity of steam
  2.     Specific volume of steam
  3.     Dryness fraction of steam
  4.     All of these
Answer: Option D
Question 4. The maximum discharge of steam through a convergent-divergent nozzle depends upon
  1.     Area of nozzle at throat
  2.     Initial pressure and volume of steam
  3.     Final pressure of steam leaving the nozzle
  4.     Both (A) and (B)
Answer: Option D
Question 5. The efficiency of an impulse turbine is maximum when (where vb = blade speed, v = absolute velocity of steam entering the blade, and α = nozzle angle)
  1.     Vb = 0.5 V cosα
  2.     Vb = V cosα
  3.     Vb = 0.5 V² cosα
  4.     Vb = V² cosα
Answer: Option A
Question 6. The maximum discharge of steam through a convergent-divergent nozzle depends upon
  1.     Area of nozzle at throat
  2.     Initial pressure and volume of steam
  3.     Final pressure of steam leaving the nozzle
  4.     Both (A) and (B)
Answer: Option D

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