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MCQs

Total Questions : 1935 | Page 23 of 194 pages
Question 221. Pick up the wrong statement about water tube boiler in comparison to fire tube boilers
  1.    Former occupies less space for same power
  2.    Rate of steam flow is more in former case
  3.    Former is used for high installed capacity
  4.    Chances of explosion are less in former case
 Discuss Question
Answer: Option D. -> Chances of explosion are less in former case
Question 222. The power of a boiler may be defined as
  1.    The ratio of heat actually used in producing the steam to the heat liberated in the furnace
  2.    The amount of water evaporated or steam produced in kg per kg of fuel burnt
  3.    The amount of water evaporated from and at 100° C into dry and saturated steam
  4.    The evaporation of 15.653 kg of water per hour from and at 100° C
 Discuss Question
Answer: Option B. -> The amount of water evaporated or steam produced in kg per kg of fuel burnt
Question 223. The cylinder condensation or missing quantity may be reduced by
  1.    The efficient steam jacketing of the cylinder walls
  2.    Superheating the steam supplied to the engine cylinder
  3.    Keeping the expansion ratio small in each cylinder
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 224. The basic job of feed water treatment in boilers is to overcome the problem of
  1.    Corrosion
  2.    Scale
  3.    Carryover
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 225. Orsat meter is used for
  1.    Gravimetric analysis of the flue gases
  2.    Volumetric analysis of the flue gases
  3.    Mass flow of the flue gases
  4.    Measuring smoke density of flue gases
 Discuss Question
Answer: Option B. -> Volumetric analysis of the flue gases
Question 226. An economiser in a boiler
  1.    Increases steam pressure
  2.    Increases steam flow
  3.    Decreases fuel consumption
  4.    Decreases steam pressure
 Discuss Question
Answer: Option C. -> Decreases fuel consumption
Question 227. A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as
  1.    Economizer
  2.    Fusible plug
  3.    Superheater
  4.    Stop valve
 Discuss Question
Answer: Option A. -> Economizer
Question 228. Which is not the correct statement about moisture in coal?
  1.    Inherent moisture and surface moisture are different things
  2.    In some coals moisture may be present up to 40%
  3.    Some moisture in coal helps in better burning which is not possible with completely dry coal
  4.    It increases thermal efficiency
 Discuss Question
Answer: Option D. -> It increases thermal efficiency
Question 229. The diameters of fire tubes and superheater tubes in locomotive boiler are
  1.    47.5 mm, 130 mm
  2.    32.5 mm, 180 mm
  3.    65.5 mm, 210 mm
  4.    24.5 mm, 65 mm
 Discuss Question
Answer: Option A. -> 47.5 mm, 130 mm
Question 230. The shell diameter and length of locomotive boiler are
  1.    1.5 m, 4 m
  2.    1.5 m, 6 m
  3.    1 m, 4 m
  4.    2 m, 4 m
 Discuss Question
Answer: Option A. -> 1.5 m, 4 m

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