A hmh flame speed is obtained in diesel engine when air fuel ratio is_______________?

Related Mcqs:

1. The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?

   A. lean mixture B. chemically correct mixture C. rich mixture D. unpredictable E. none of the above...

2. 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...

3. Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

   A. Lean mixture B. Chemically correct fuel air ratio C. Rich mixture D. Unpredictable...

4. The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

   A. lean mixture B. chemically correct mixture C. rich mixture D. unpredictable E. none of the above...

5. 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...

6. The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is_______________?

   A. same B. more C. less D. less or more depending on operating conditions E. unpredictable...

7. 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...

8. In diesel engine, the compression ratio in comparison to expansion ratio is_______________?

   A. same B. less C. more D. variable E. more/less depending on engine capacity....

9. Air fuel ratio for idling speed of a petrol engine is approximately_________________?

   A. 1 : 1 B. 5 : 1 C. 10:1 D. 15 : 1 E. 20 : 1...

10. The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be________________?

    A. higher B. lower C. remain unaffected D. unpredictable E. none of the above...