Solid injection in I.C. engines refers to injection of________________?

Related Mcqs:

1. Air injection in I.C. engines refers to injection of___________________?

   A. air only
   B. liquid fuel only
   C. liquid fuel and air
   D. supercharging
   E. does not exist

2. Diesel engines as compared to petrol engines require ______________________?

   A. bigger flywheel
   B. smaller flywheel
   C. same size flywheel
   D. no flywheel
   E. flywheel whose size may be less or more depending on several other fac-tors

3. In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?

   A. 0.85
   B. 1
   C. 1.1 to 1.3
   D. 1.2 to 1.5

4. The ignition coil in diesel engines produces voltage of the order of________________?

   A. 6 to 12 volts
   B. 240 volts
   C. 1000 volts
   D. 20,000 volts
   E. 80,000 volts

5. Injection lag is_________________?

   A. the time taken by fuel after injection (before top dead center) to reach upto auto-ignition temperature
   B. time before actual fuel injection and the pump pluger starts to pump fuel
   C. time corresponding to actual injection and top dead center
   D. time corresponding to actual ignition and top dead center
   E. none of the above

6. In a diesel engine, injection pressure developed by injector is of the order of______________?

   A. 10 kg/cm2
   B. 100 kg/cm2
   C. 500 kg/cm2
   D. 1400 kg/cm2

7. The efficiency of I.C. engines normally is of the order of_________________?

   A. 15-20%
   B. 20-25%
   C. 25-30%
   D. 30-35%
   E. 35-50%

8. Exhaust pipes of engines are covered with insulating marterial in order to_________________?

   A. keep the exhaust pipes warm
   B. reduce formation of condenstae
   C. reduce heat transfer to the engine room
   D. increase engine efficiency
   E. conserve heat

9. In petrol engines, advancing the spark timing will_______________?

   A. increase the knocking tendency
   B. decrease the knocking tendency
   C. not affect the knocking tendncy
   D. increase or decrease knocking tendency depending on strenght and time of spark
   E. unpredictable

10. Which of the following engines can work on very lean mixture__________________?

    A. S.I. engine
    B. C.I. engine
    C. two stroke engine
    D. four stroke engine
    E. all of the above