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MCQs

Total Questions : 70 | Page 4 of 7 pages
Question 31. The maximum percentage gain in Regenerative feed heating cycle thermal efficiency
  1.    increases with number of feed heaters increasing
  2.    decreases with number of feed heaters increasing
  3.    remains same unaffected by number of feed heaters
  4.    none of the above
 Discuss Question
Answer: Option A. -> increases with number of feed heaters increasing
Question 32. Edward?s air pump
  1.    removes air and also vapour from condenser
  2.    removes only air from condenser
  3.    removes only un-condensed vapour from condenser
  4.    removes air alongwith vapour and also the condensed water from condenser
 Discuss Question
Answer: Option D. -> removes air alongwith vapour and also the condensed water from condenser
Question 33. Rateau steam turbine is
  1.    reaction steam turbine
  2.    velocity compounded impulse steam turbine
  3.    pressure compounded impulse steam turbine
  4.    pressure velocity compounded steam turbine
 Discuss Question
Answer: Option C. -> pressure compounded impulse steam turbine
Question 34. The overall efficiency of thermal power plant is equal to
  1.    Rankine cycle efficiency
  2.    Carnot cycle efficiency
  3.    Regenerative cycle efficiency
  4.    Boiler efficiency x turbine efficiency x generator efficiency
 Discuss Question
Answer: Option C. -> Regenerative cycle efficiency
Question 35. For Parson's reaction steam turbine, degree of reaction is
  1.    75%
  2.    100%
  3.    50%
  4.    60%
 Discuss Question
Answer: Option C. -> 50%
Question 36. The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is
  1.    Higher
  2.    Lower
  3.    Same as long as initial pressure and temperature is unchanged
  4.    None of the above
 Discuss Question
Answer: Option A. -> Higher
Question 37. Bucket elevators are used for
  1.    carrying coal in horizontal direction
  2.    carrying coal in vertical direction
  3.    carrying coal in any direction
  4.    none of the above
 Discuss Question
Answer: Option B. -> carrying coal in vertical direction
Question 38. In steam turbines the reheat factor
  1.    increases with the increase in number of stages
  2.    decreases with the increase in number of stages
  3.    remains same irrespective of number of stages
  4.    none of the above
 Discuss Question
Answer: Option A. -> increases with the increase in number of stages
Question 39. Pipes carrying steam are generally made up of
  1.    steel
  2.    cast iron
  3.    copper
  4.    aluminium
 Discuss Question
Answer: Option A. -> steel
Question 40. The maximum length of a screw conveyer is about
  1.    30 metres
  2.    40 metres
  3.    60 metres
  4.    100 metres
 Discuss Question
Answer: Option A. -> 30 metres

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