Lakshya Education MCQs

Question: A diesel engine as compared to petrol engine (both running and rated load) is
Options:
A. More efficient
B. Less efficient
C. Equally efficient
D. Other factors will decide it
Answer: Option A
Explanation :

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More Questions on This Topic :

Question 1. In a four stroke cycle petrol engine, the expansion
  1.     Starts at top dead center and ends at bottom dead center
  2.     Starts at 30° before top dead center and ends at 50° before bottom dead center
  3.     Starts at 30° after top dead center and ends at 50° after bottom dead center
  4.     May start and end anywhere
Answer: Option B
Explanation :
Question 2. Air fuel ratio at which a petrol engine cannot work is
  1.     8 : 1
  2.     10 : 1
  3.     15 : 1
  4.     20 : 1 and less
Answer: Option D
Explanation :
Question 3. The reference fuels for knock rating of spark ignition engines would include
  1.     Iso-octane and alpha-methyl naphthalene
  2.     Normal octane and aniline
  3.     Iso-octane and normal hexane
  4.     Normal heptane and iso-octane
Answer: Option D
Explanation :
Question 4. A supercharged engine as compared to an ordinary engine
  1.     Requires smaller foundation
  2.     Is lighter
  3.     Consumes less lubricating oil
  4.     All of these
Answer: Option D
Explanation :
Question 5. In a petrol engine, if diesel is used, then the engine will
  1.     Not run
  2.     Run more efficiently
  3.     Run at high speed
  4.     Explode
Answer: Option A
Explanation :
Question 6. Supercharging is the process of supplying the intake air to the engine cylinder at a density _________ the density of the surrounding atmosphere.
  1.     Equal to
  2.     Less than
  3.     Greater than
  4.     None of these
Answer: Option C
Explanation :

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