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MCQs

Total Questions : 1124 | Page 52 of 113 pages
Question 511. Supercharging is the process of supplying the intake air to the engine cylinder at a density ___ the density of the surrounding atmosphere.
  1.    Greater than
  2.    Less than
  3.    Equal to
  4.    None of the listed here
 Discuss Question
Answer: Option A. -> Greater than
Question 512. The reference fuels for knock rating of spark ignition engines would include
  1.    Iso-octane and normal hexane
  2.    Normal octane and aniline
  3.    Iso-octane and alpha-methyl naphthalene
  4.    Normal heptane and iso-octane
 Discuss Question
Answer: Option D. -> Normal heptane and iso-octane
Question 513. The mechanical efficiency (ηm) of the engine is given by
  1.    ηm = I.P/B.P
  2.    ηm = (B.P × I.P)/100
  3.    None of the listed here
  4.    ηm = B.P/I.P
 Discuss Question
Answer: Option D. -> ηm = B.P/I.P
Question 514. A diesel engine is ___ as compared to petrol engine, both running at rated load.
  1.    More efficient
  2.    Equally efficient
  3.    Less efficient
  4.    None of the listed here
 Discuss Question
Answer: Option A. -> More efficient
Question 515. The power actually developed by the engine cylinder of an I.C. engine is known as
  1.    None of the listed here
  2.    Indicated power
  3.    Actual power
  4.    Theoretical power
 Discuss Question
Answer: Option B. -> Indicated power
Question 516. Most high speed compression engines operate on
  1.    Otto cycle
  2.    Special type of air cycle
  3.    Diesel cycle
  4.    Dual combustion cycle
 Discuss Question
Answer: Option D. -> Dual combustion cycle
Question 517. Antiknock for compression ignition engines is
  1.    Amyl nitrate
  2.    Tetra ethyl lead
  3.    Napthene
  4.    Hexadecane
 Discuss Question
Answer: Option A. -> Amyl nitrate
Question 518. The advancing of spark timing in spark ignition engines will ___ knocking tendency.
  1.    Increase
  2.    None of the listed here
  3.    Reduce
  4.    Not effect
 Discuss Question
Answer: Option A. -> Increase
Question 519. Thermal efficiency of a two stroke cycle engine is ___ a four stroke cycle engine.
  1.    Greater than
  2.    Equal to
  3.    None of the listed here
  4.    Less than
 Discuss Question
Answer: Option D. -> Less than
Question 520. The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine.
  1.    Very high
  2.    High
  3.    Very low
  4.    Low
 Discuss Question
Answer: Option A. -> Very high

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