Gaseous-fuel guarantees are based on___________________?

Related Mcqs:

1. 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

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

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

3. 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

4. Which is correct statement about reaction time for autoignition of fuel and the fuel air ratio__________________?

   A. lean mixture has high reaction time
   B. rich mixture has high reaction time
   C. chemically correct mixture has mini-mum reaction time
   D. all of the above
   E. non of the above

5. 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

6. 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

7. The calorific value of gaseous fuels is expressed in terms of__________________?

   A. kcal
   B. kcal/kg
   C. kcal/m2
   D. kcal/m²
   E. all of the above

8. Air fuel ratio at which a petrol engine can not work is_________________?

   A. 8 : 1
   B. 10 : 1
   C. 15 : 1
   D. 20 : 1 and less
   E. will work at all ratios

9. The function of a fuel pump in a petrol pump is to______________________?

   A. inject fuel in cylinder
   B. supply fuel when carburettor fails
   C. pump fuel so that it reaches carburettor (to improve thermal efficiency)
   D. does not exist

10. In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?

    A. 0.85
    B. 1
    C. 1.1 to 1.3
    D. 1.2 to 1.5