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MCQs

Total Questions : 1935 | Page 9 of 194 pages
Question 81. Film boiling occurs at
  1.    Very low pressure
  2.    Atmospheric pressures
  3.    Medium pressures
  4.    Very high pressures
 Discuss Question
Answer: Option D. -> Very high pressures
Question 82. While steam expands in turbines, theoretically the entropy
  1.    Remains constant
  2.    Increases
  3.    Decreases
  4.    Behaves unpredictably
 Discuss Question
Answer: Option A. -> Remains constant
Question 83. Water and sediment in fuel oil can be removed by
  1.    Heating the oil in the settling tanks
  2.    Cooling the oil in the settling tanks
  3.    Burning the oil
  4.    Suspension
 Discuss Question
Answer: Option A. -> Heating the oil in the settling tanks
Question 84. The bituminous coal is no caking if its carbon content is
  1.    78-81%
  2.    81-85%
  3.    85-90%
  4.    90-95%
 Discuss Question
Answer: Option A. -> 78-81%
Question 85. The number of flue tubes in Lancashire boiler is
  1.    Zero
  2.    One
  3.    Two
  4.    Four
 Discuss Question
Answer: Option C. -> Two
Question 86. Lancashire boiler is
  1.    Stationary fire tube boiler
  2.    Internally fired boiler
  3.    Horizontal boiler
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 87. The heat loss in a boiler takes place in the form of
  1.    Heat carried away by flue gases
  2.    Heat carried away by ash
  3.    Moisture present in fuel and steam formed by combustion of hydrogen in fuel
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 88. The efficiency of the plant __________ with the mechanical draught.
  1.    Increases
  2.    Decreases
  3.    Remains constant
  4.    None of these
 Discuss Question
Answer: Option A. -> Increases
Question 89. The expansion of steam in a nozzle follows
  1.    Carnot cycle
  2.    Rankine cycle
  3.    Joule cycle
  4.    Stirling cycle
 Discuss Question
Answer: Option B. -> Rankine cycle
Question 90. In a uniflow engine
  1.    Steam enters and exhausts through the same port
  2.    Steam enters at one end and exhausts at the centre
  3.    Steam enters at the centre and exhausts at the other end
  4.    None of the above
 Discuss Question
Answer: Option B. -> Steam enters at one end and exhausts at the centre

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