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MCQs

Total Questions : 1935 | Page 21 of 194 pages
Question 201. The condition of steam in boiler drum is always
  1.    Dry
  2.    Wet
  3.    Saturated
  4.    Supersaturated
 Discuss Question
Answer: Option B. -> Wet
Question 202. The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called
  1.    Condenser efficiency
  2.    Vacuum efficiency
  3.    Nozzle efficiency
  4.    Boiler efficiency
 Discuss Question
Answer: Option A. -> Condenser efficiency
Question 203. Lancashire boiler has __________ internal flue tubes.
  1.    One
  2.    Two
  3.    Three
  4.    Four
 Discuss Question
Answer: Option B. -> Two
Question 204. For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then
  1.    α₁ = α₂ and β₁ = β₂
  2.    α₁ = β₁ and α₂= β₂
  3.    α₁ < β₁ and α₂ > β₂
  4.    α₁ = β₂ and β₁ = α₂
 Discuss Question
Answer: Option B. -> α₁ = β₁ and α₂= β₂
Question 205. Pick up wrong statement about desired properties of a good fuel
  1.    High calorific value
  2.    Produce minimum smoke and gases
  3.    Ease in storing
  4.    High ignition point
 Discuss Question
Answer: Option D. -> High ignition point
Question 206. A device used to increase the temperature of saturated steam without raising its pressure, is called
  1.    Blow off cock
  2.    Fusible plug
  3.    Superheater
  4.    Stop valve
 Discuss Question
Answer: Option C. -> Superheater
Question 207. In order to reduce the rotor speed of an impulse turbine, the method employed is
  1.    Velocity compounding
  2.    Pressure compounding
  3.    Pressure-velocity compounding
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 208. The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
  1.    V = 2g H'
  2.    V = 2g/H'
  3.    V = H'/2g
  4.    V = 2gH'
 Discuss Question
Answer: Option A. -> V = 2g H'
Question 209. The function of a piston rod is
  1.    To guide motion of the piston rod and to prevent it from bending
  2.    To transfer motion from the piston to the cross head
  3.    To convert heat energy of the steam into mechanical work
  4.    To exhaust steam from the cylinder at proper moment
 Discuss Question
Answer: Option B. -> To transfer motion from the piston to the cross head
Question 210. For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is
  1.    1 kg
  2.    4/3 kg
  3.    8/3 kg
  4.    2 kg
 Discuss Question
Answer: Option B. -> 4/3 kg

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