The operation of forcing additional air under pressure in the engine cylinder is known as________________?

Related Mcqs:

1. The ignition of charge by some hot surface in the engine cylinder before operation of spark plug is known as________________?

   A. auto ignition
   B. preignition
   C. retarded ignition
   D. accelerated ignition
   E. detonation

2. If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the________________?

   A. exhaust will be smoky
   B. piston rings would stick into piston grooves
   C. exhaust temperature will be high
   D. engine starts overheating
   E. scavenging occurs

3. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?

   A. 250°C
   B. 500°C
   C. 1000°C
   D. 150CPC
   E. 2000°C

4. Diesel engine can work on very lean air fuel ratio of the order of 30 : 1. A petrol engine can also work on such a lean ratio provided__________________?

   A. it is properly designed
   B. best quality fuel is used
   C. can not work as it is impossible
   D. flywheel size is proper
   E. engine cooling is stopped

5. The ratio of useful power; engine friction exhaust gas losses; cooling water, air and oil losses for a diesel engine is of the order of____________________?

   A. 5:25:30:50
   B. 25:35:5:35
   C. 25:5:10:60
   D. 40:30:15:15
   E. 25:5:35:35

6. Scavenging air is supplied to a two-stroke engine at a density greater than that of atmosphere. This means the engine is__________________?

   A. Supercharged
   B. Not supercharged
   C. Charged
   D. Supercharged provided its speed is low

7. The maximum temperature in the I.C. engine cylinder is of the order of ________________?

   A. 500- 1000°C
   B. 1000- 1500°C
   C. 1500-2000°C
   D. 2000-2500°C
   E. 2500-3000°C

8. Which of the following medium is compressed in a Diesel engine cylinder __________________?

   A. air aione
   B. air and fuel
   C. air and lub oil
   D. fuel alone
   E. air, fuel and lub oil

9. Violent sound pulsations within the cylinder of an I.C. engine are caused due to_________________?

   A. heavy turbulence
   B. improved scavenging
   C. heavy supercharging
   D. detonation
   E. preignition

10. The most popular firing order in case of four cylinder in-line I.C. engine is__________________?

    A. 1-2-3-4
    B. 1-3-2-4
    C. 1-4-2-3
    D. 1-2-4-3
    E. 1-3-4-