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MCQs

Total Questions : 70 | Page 5 of 7 pages
Question 41. Steam turbines are governed by the following methods
  1.    Throttle governing
  2.    Nozzle control governing
  3.    By-pass governing
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 42. The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is
  1.    0.555
  2.    0.578
  3.    0.5457
  4.    0.6
 Discuss Question
Answer: Option C. -> 0.5457
Question 43. The cooling section in the surface condenser
  1.    increases the quantity of vapour extracted along with air
  2.    reduces the quantity of vapour extracted along with air
  3.    does not affect vapour quantity extracted but reduces pump capacity of air extraction pump
  4.    none of the above
 Discuss Question
Answer: Option B. -> reduces the quantity of vapour extracted along with air
Question 44. The draught in locomotive boilers is produced by
  1.    forced fan
  2.    chimney
  3.    steam jet
  4.    only motion of locomotive
 Discuss Question
Answer: Option C. -> steam jet
Question 45. The percentage 02 by volume in atmosphere air is
  1.    21%
  2.    23%
  3.    77%
  4.    79%
 Discuss Question
Answer: Option A. -> 21%
Question 46. In a surface condenser if air is removed, there is
  1.    fall in absolute pressure maintained in condenser
  2.    rise in absolute pressure maintained in condenser
  3.    no change in absolute pressure in the condenser
  4.    rise in temperature of condensed steam
 Discuss Question
Answer: Option A. -> fall in absolute pressure maintained in condenser
Question 47. Economiser is used to heat
  1.    air
  2.    feed water
  3.    flue gases
  4.    all above
 Discuss Question
Answer: Option B. -> feed water
Question 48. Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is
  1.    underfeed stoker
  2.    overfeed stoker
  3.    any
  4.    none of the above
 Discuss Question
Answer: Option B. -> overfeed stoker
Question 49. The pressure on the two sides of the impulse wheel of a steam turbine
  1.    is same
  2.    is different
  3.    increases from one side to the other side
  4.    decreases from one side to the other side
 Discuss Question
Answer: Option A. -> is same
Question 50. Thorium Breeder Reactors are most suitable for India because
  1.    these develop more power
  2.    its technology is simple
  3.    abundance of thorium deposits are available in India
  4.    these can be easily designed
 Discuss Question
Answer: Option C. -> abundance of thorium deposits are available in India

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