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MCQs

Total Questions : 1124 | Page 53 of 113 pages
Question 521. In petrol engines, advancing of the spark timing will ___ the knocking tendency.
  1.    Increase
  2.    None of the listed here
  3.    Decrease
  4.    Not effect
 Discuss Question
Answer: Option A. -> Increase
Question 522. The voltage required to produce a spark across the gap, between the sparking points is
  1.    6000 to 10,000 volts
  2.    10,000 to 12,000 volts
  3.    4000 to 6000 volts
  4.    2000 to 4000 volts
 Discuss Question
Answer: Option A. -> 6000 to 10,000 volts
Question 523. The following volume of air is required for consuming 1 liter of fuel by a four stroke engine
  1.    910 m3
  2.    56 m3
  3.    1 m3
  4.    5 m3
 Discuss Question
Answer: Option A. -> 910 m3
Question 524. Which of the following is not an intern’s combustion engine?
  1.    2-stroke petrol engine
  2.    Diesel engine
  3.    4-stroke petrol engine
  4.    Steam turbine
 Discuss Question
Answer: Option D. -> Steam turbine
Question 525. The process of breaking up or a liquid into fine droplets by spraying is called
  1.    Atomization
  2.    Vaporisation
  3.    Ionization
  4.    Carburetion
 Discuss Question
Answer: Option A. -> Atomization
Question 526. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is
  1.    Less
  2.    Same
  3.    More or less depending on power rating
  4.    More
 Discuss Question
Answer: Option D. -> More
Question 527. If the temperature of intake air in internal combustion engine increases, then its efficiency will
  1.    Decrease
  2.    Increase
  3.    None of the listed here
  4.    Remain same
 Discuss Question
Answer: Option A. -> Decrease
Question 528. In a four stroke cycle petrol engine, the charge is ignited at
  1.    30° after bottom dead center
  2.    30° before bottom dead center
  3.    30° before top dead center
  4.    30° after top dead center
 Discuss Question
Answer: Option C. -> 30° before top dead center
Question 529. In the crankcase method of scavenging, the air pressure is produced by
  1.    Supercharger
  2.    Centrifugal pump
  3.    Movement of engine piston
  4.    Natural aspirator
 Discuss Question
Answer: Option C. -> Movement of engine piston
Question 530. It the temperature of intake air in IC engines is lowered, then its efficiency will
  1.    Decrease
  2.    Increase
  3.    Remain same
  4.    Increase up to certain limit and then decrease
 Discuss Question
Answer: Option B. -> Increase

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