Lakshya Education MCQs

Question: The diagram efficiency is the ratio of
Options:
A.Workdone on the blades to the energy supplied to the blades
B.Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
C.Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
D.None of the above
Answer: Option A

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More Questions on This Topic :

Question 1. The nozzle efficiency is the ratio of
  1.    Workdone on the blades to the energy supplied to the blades
  2.    Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
  3.    Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
  4.    None of the above
Answer: Option C
Question 2. The specific heat of superheated steam in kcal/kg is generally of the order of
  1.    0.1
  2.    0.3
  3.    0.5
  4.    0.8
Answer: Option C
Question 3. Efficiency of a thermal cycle increases by
  1.    Regeneration
  2.    Reheating of steam
  3.    Both (A) and (B)
  4.    Cooling of steam
Answer: Option C
Question 4. For combustion of a fuel, following is essential
  1.    Correct fuel air ratio
  2.    Proper ignition temperature
  3.    O₂ to support combustion
  4.    All the three above
Answer: Option D
Question 5. The water tubes in a Babcock and Wilcox boiler are
  1.    Horizontal
  2.    Vertical
  3.    Inclined
  4.    Horizontal and inclined
Answer: Option C
Question 6. The pressure at which latent heat of vaporisation of water is zero, is
  1.    Below atmospheric pressure
  2.    1 kg/cm²
  3.    100 kg/cm²
  4.    225.6 kg/cm²
Answer: Option D

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