The delay period in petrol engine is of the order of__________________?

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

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

4. 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

5. Deposition of carbon in petrol engine cylinder would result in increase of__________________?

   A. clearance volume
   B. swept volume
   C. compression ratio
   D. volumetric efficiency
   E. mean effective pressure

6. 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

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 pressure and temperature at the end of compression stroke in a petrol engine are of the order of___________________?

   A. 4 – 6 kg/cm2 and 200 – 250°C
   B. 6 – 12 kg/cm2 and 250 – 350°C
   C. 12 – 20 kg/cm2 and 350 – 450°C
   D. 20 – 30 kg/cm2 and 450 – 500°C
   E. 30 – 40 kg/cm2 and 500 – 700°C

9. The theoretically correct air fuel ratio for petrol engine is of the order of___________________?

   A. 6 : 1
   B. 9 : 1
   C. 12 : 1
   D. 15 : 1
   E. 20 : 1

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