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

Related Mcqs:

1. 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

2. The thermal efficiency of a diesel engine is of the order of_________________?

   A. 92%
   B. 68%
   C. 52%
   D. 34%
   E. 25%.

3. It the temperature of intake air in IC engines is lowered, then its efficiency will_______________________?

   A. increase
   B. decrease
   C. remain same
   D. increase upto certain limit and then decrease
   E. decrease upto certain limit and then in-crease

4. In order to prevent knock in the S.I. engines, the charge away from the spark plug should have___________________?

   A. low temperature
   B. low density
   C. long ignition delay
   D. rich mixture
   E. all of the above

5. 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

6. 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

7. The fuel in diesel engine is normally injected at pressure of_________________?

   A. 5-10 kg/cm2
   B. 20-25 kg/cm2
   C. 60-80 kg/cm2
   D. 90-130 kg/cm2
   E. 150-250 kg/cm2

8. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________?

   A. net efficiency
   B. efficiency ratio
   C. relative efficiency
   D. overall efficiency
   E. cycle efficiency

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

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

10. The essential equipment for producing high vlotage for sparking in petrol engines with battery is_______________?

    A. ignition coil
    B. ignition coil and distributor
    C. ignition coil and condenser
    D. ignition coil and contact breaker
    E. ignition coil, contact breaker and con-denser