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

Related Mcqs:

1. 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

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. Which of the following are used in diesel engines and oil fired boilers :

   A. Paraffin
   B. Gasoline
   C. Heavy fuel oils
   d) Patrol

   Submitted by: Faheem Zaman Dhaunroo

4. Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?

   A. not true
   B. true at full load
   C. true at part load
   D. true at both part and full load
   E. there could not be any such criterion

5. 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%

6. 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

7. 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

8. 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

9. 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

10. 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