The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?

Related Mcqs:

1. In a typical medium speed 4 stroke cycle diesel engine_______________?

   A. exhaust valve opens at 35° before bot-tom dead center and closes at 20° after top dead center
   B. exhaust valve opens at bottom ‘dead center and closes at top dead center
   C. exhaust valve opens just after bottom dead center and closes just before top dead center
   D. may open and close anywhere
   E. none of the above is true

2. 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.

3. For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be________________?

   A. smaller
   B. bigger
   C. same size
   D. dependent on other engine parameters
   E. unpredictable

4. For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?

   A. about twice
   B. about 0.5 times
   C. nearly equal
   D. about 1.7 times
   E. about 5 times

5. 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

6. 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

7. 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

8. The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft___________________?

   A. 1/2
   B. 1
   C. 2
   D. 4
   E. 8

9. All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?

   A. Half
   B. One
   C. Two
   D. Four

10. The cam shaft of a four stroke I.C. engine running at 1500 rmp will run at __________________?

    A. 1500 rpm
    B. 750 rpm
    C. 3000 rpm
    D. any value independent of engine speed
    E. none of the above