Lakshya Education MCQs

Question: The efficiency of steam turbines may be improved by
A.Reheating of steam
B.Regenerative feed heating
C.Binary vapor plant
D.Any one of these
Answer: Option D

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More Questions on This Topic :

Question 1. Green coal, in order to be burnt, must be
  1.    Heated sufficiently
  2.    Burnt in excess air
  3.    Heated to its ignition point
  4.    Burnt as powder
Answer: Option C
Question 2. Incomplete combustion can be best judged by
  1.    Smoky chimney exit
  2.    Excess air in flue gases
  3.    Measuring carbon monoxide in flue gases
  4.    Measuring temperature of flue gases at exit of furnace
Answer: Option C
Question 3. The ratio of the workdone on the blades to the energy supplied to the blades, is called
  1.    Blading efficiency
  2.    Nozzle efficiency
  3.    Gross or stage efficiency
  4.    Mechanical efficiency
Answer: Option A
Question 4. De-Laval turbine is a
  1.    Simple impulse turbine
  2.    Simple reaction turbine
  3.    Impulse-reaction turbine
  4.    None of these
Answer: Option A
Question 5. The chimney draught varies with
  1.    Climatic conditions
  2.    Temperature of furnace gases
  3.    Height of chimney
  4.    All of these
Answer: Option D
Question 6. Heating of dry steam above saturation temperature is known as
  1.    Enthalpy
  2.    Superheating
  3.    Super saturation
  4.    Latent heat
Answer: Option B

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