Fuel oil consumption guarantees for I .C. engine are usually based on__________________? - PakMcqs

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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. In case of gas turbines, the gaseous fuel consumption guarantees are based on________________?

   A. high heat value B. low heat value C. net calorific value D. middle heat value E. calorific value...

3. 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...

4. Gaseous-fuel guarantees are based on___________________?

   A. calorific value of oil B. low heat value of oil C. high heat value of oil D. mean heat value of oil E. all of the above...

5. The specific fuel consumption per BH hour for a petrol engine is approximately__________________?

   A. 0.15 kg B. 0.2 kg C. 0.25 kg D. 0.3kg E. 0.35 kg...

6. The specific fuel consumption per BHP hour for diesel engine is approximately___________________?

   A. 0.15 kg B. 0.2 kg C. 0.25 kg D. 0.3 kg E. 0.35 kg...

7. 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...

8. 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...

9. 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...

10. 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...