In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________?

Related Mcqs:

1. The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?

   A. higher
   B. lower
   C. same
   D. depends on size of engine
   E. unpredictable.

2. In the case of compression ignition engine, the %age of CO in exhaust gases is________________?

   A. Zero
   B. 5-10%
   C. Depends on load
   D. Considerable percent

3. A diesel engine as compared to petrol engine (both running ar rated load) is ____________________?

   A. more efficient
   B. less efficient
   C. equally efficient
   D. unperdictable
   E. other factors will decide it

4. 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

5. With increase in engine speed, the ignition of spark in petrol engine has to be __________________?

   A. Unaltered
   B. Increased
   C. Decreased
   D. Advanced

6. 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

7. 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

8. 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

9. The output of a diesel engine can be increased without increasing the engine revolution or size in following way_________________?

   A. feeding more fuel
   B. increasing flywheel size
   C. heating incoming air
   D. scavenging
   E. supercharging

10. For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of _________________?

    A. 9 : 1
    B. 12 : 1
    C. 15 : 1
    D. 18 : 1
    E. 20: 1