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MCQs

Total Questions : 1935 | Page 27 of 194 pages
Question 261. Clearance ratio is the ratio of
  1.    Clearance volume to the swept volume
  2.    Clearance volume to the volume at cut-off
  3.    Volume at cut-off to the swept volume
  4.    Swept volume to the clearance volume
 Discuss Question
Answer: Option A. -> Clearance volume to the swept volume
Question 262. Cut-off ratio is the ratio of
  1.    Swept volume to the volume at cut-off
  2.    Volume at cut-off to the clearance volume
  3.    Volume at cut-off to the swept volume
  4.    Clearance volume to the volume at cut-off
 Discuss Question
Answer: Option C. -> Volume at cut-off to the swept volume
Question 263. The fire tubes in a Cochran boiler are
  1.    Horizontal
  2.    Vertical
  3.    Inclined
  4.    None of these
 Discuss Question
Answer: Option A. -> Horizontal
Question 264. The numbers of fire tubes in a Cochran boiler are
  1.    75
  2.    115
  3.    165
  4.    225
 Discuss Question
Answer: Option C. -> 165
Question 265. The three "Ts" for good combustion are
  1.    Temperature, time, and turbulence
  2.    Total air, true fuel, and turbulence
  3.    Thorough mixing, total air and temperature
  4.    Total air, time, and temperature
 Discuss Question
Answer: Option A. -> Temperature, time, and turbulence
Question 266. The function of a valve rod is
  1.    To provide reciprocating motion to the slide valve
  2.    To convert reciprocating motion of the piston into rotary motion of the crank
  3.    To convert rotary motion of the crankshaft into to and fro motion of the valve rod
  4.    To provide simple harmonic motion to the D-slide valve
 Discuss Question
Answer: Option D. -> To provide simple harmonic motion to the D-slide valve
Question 267. In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
  1.    Velocity increases
  2.    Velocity decreases
  3.    Velocity remains constant
  4.    Pressure remains constant
 Discuss Question
Answer: Option B. -> Velocity decreases
Question 268. When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as
  1.    Internally fired boiler
  2.    Externally fired boiler
  3.    Natural circulation boiler
  4.    Forced circulation boiler
 Discuss Question
Answer: Option C. -> Natural circulation boiler
Question 269. The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as
  1.    Regenerative heating
  2.    Reheating of steam
  3.    Bleeding
  4.    None of these
 Discuss Question
Answer: Option C. -> Bleeding
Question 270. Equivalent evaporation is the amount of water evaporated in a boiler from and at
  1.    0°C
  2.    100°C
  3.    Saturation temperature at given pressure
  4.    Room temperature
 Discuss Question
Answer: Option B. -> 100°C

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