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MCQs

Total Questions : 1124 | Page 105 of 113 pages
Question 1041. 1. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be
  1.    2%
  2.    4%
  3.    8%
  4.    14%
 Discuss Question
Answer: Option D. -> 14%
Question 1042. 9. An engine indicator is used to determine the following
  1.    Speed
  2.    Temperature
  3.    Volume Of Cylinder
  4.    M.E.P. And I.H.P.
 Discuss Question
Answer: Option D. -> M.E.P. And I.H.P.
Question 1043. 3. In a typical medium speed 4-stroke cycle diesel engine the inlet valve
  1.    Opens At 20° Before Top Dead Center And Closes At 35° After The Bottom Dead Center
  2.    Opens At Top Dead Center And Closes At Bottom Dead Center
  3.    Opens At 10° After Top Dead Center And Closes 20° Before The Bottom Dead Center
  4.    May Open Or Close Anywhere
 Discuss Question
Answer: Option A. -> Opens At 20° Before Top Dead Center And Closes At 35° After The Bottom Dead Center
Question 1044. 2. In case of gas turbines, the gaseous fuel consumption guarantees are based on
  1.    High Heat Value
  2.    Low Heat Value
  3.    Net Calorific Value
  4.    Middle Heat Value
 Discuss Question
Answer: Option B. -> Low Heat Value
Question 1045. 4. The pressure and temperature at the end of compression stroke in a petrol engine are of the order of
  1.    4 - 6 Kg/cm2 And 200 - 250°C
  2.    6 - 12 Kg/cm2 And 250 - 350°C
  3.    12 - 20 Kg/cm2 And 350 - 450°C
  4.    20 - 30 Kg/cm2 And 450 - 500°C
 Discuss Question
Answer: Option B. -> 6 - 12 Kg/cm2 And 250 - 350°C
Question 1046. 5. The pressure at the end of compression in the case of diesel engine is of the order of
  1.    6 kg/cm2
  2.    12 Kg/cm2
  3.    35 Kg/cm2
  4.    27.5 Kg/cm2
 Discuss Question
Answer: Option C. -> 35 Kg/cm2
Question 1047. 6. The maximum temperature in the I.C. engine cylinder is of the order of
  1.    500- 1000°C
  2.    1000- 1500°C
  3.    1500-2000°C
  4.    2000-2500°C
 Discuss Question
Answer: Option D. -> 2000-2500°C
Question 1048. 9. Combustion in compression ignition engines is
  1.    Homogeneous
  2.    Heterogeneous
  3.    Both (A) And (B)
  4.    Laminar
 Discuss Question
Answer: Option B. -> Heterogeneous
Question 1049. 7. The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will
  1.    Increase
  2.    Decrease
  3.    Be Independent
  4.    May Increase Or Decrease Depending On Other Factors
 Discuss Question
Answer: Option B. -> Decrease
Question 1050. 8. Pick up the wrong statement
  1.    2-Stroke Engine Can Run In Any Direction
  2.    In 4-Stroke Engine, A Power Stroke Is Obtained In 4-Strokes
  3.    Petrol Engines Occupy More Space Than Diesel Engines For Same Power Output.
  4.    Petrol Engines Work On Otto Cycle
 Discuss Question
Answer: Option C. -> Petrol Engines Occupy More Space Than Diesel Engines For Same Power Output.

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