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

Related Mcqs:

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

   A. Zero
   B. 5-10%
   C. Depends on load and quality of fuel
   D. Considerable percent

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

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

3. 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

4. Combustion in compression ignition engines is____________________?

   A. homogeneous
   B. heterogeneous
   C. both A. and B.
   D. laminar
   E. turbulent

5. The ignition of charge by some hot surface in the engine cylinder before operation of spark plug is known as________________?

   A. auto ignition
   B. preignition
   C. retarded ignition
   D. accelerated ignition
   E. detonation

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. Ignition timing of a multicylider petrol engine can be adjusted by_________________?

   A. rotating the crank
   B. adjusting the spark plug gap
   C. adjusting ignition coil position
   D. rotating the distributor
   E. delaying the spark by increasing capacitor in ignition circuit

8. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be________________?

   A. 2%
   B. 4%
   C. 8%
   D. 14%
   E. 27%.

9. The pressure at the end of compression in the case of diesel engine is of the order of___________________?

   A. 6 kg/cm
   B. 12kg/cmz
   C. 20 kg/cmz
   D. 27.5 kg/cmz
   E. 35 kg/cm

10. 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.