Related Mcqs:

1. Diesel engines as compared to petrol engines require ______________________?

   A. bigger flywheel
   B. smaller flywheel
   C. same size flywheel
   D. no flywheel
   E. flywheel whose size may be less or more depending on several other fac-tors

2. In the crankcase method of scavenging, the air pressure is produced by_________________?

   A. supercharger
   B. centrifugal pump
   C. natural aspirator
   D. movement of engine piston
   E. reciprocating pump

3. Compression loss in I.C engines occurs due to_________________?

   A. leaking piston rings
   B. use of thick head gasket
   C. clogged air-inlet slots
   D. increase in clearance volume caused b bearing-bushing wear
   E. all of the above

4. Compression ratio of LC. engines is ___________________?

   A. the ratio of volumes of air in cylinder before compression stroke and after compression stroke
   B. volume displaced by piston per stroke and clearance volume in cylinder
   C. ratio of pressure after compression and before compression
   D. swept volume/cylinder volume
   E. cylinder volume/swept volume

5. Most high speed compression engines operate on ___________________?

   A. Otto cycle
   B. Diesel cycle
   C. Dual cycle
   D. Carnot cycle
   E. Two stroke cycle

6. All heat engines utilize_____________________?

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

7. Fuel consumption of diesef engines is not guaranteed at one quarter load because at such low loads________________?

   A. the friction is high
   B. the friction is unpredictable
   C. the small difference in cooling water temperature or in internal friction has a disproportionate effect
   D. the engine is rarely operated
   E. none of the above

8. For the same power developed in I.C. engines, the cheaper system is_____________?

   A. naturally aspirated
   B. supercharged
   C. centrifugal pump
   D. turbo charger
   E. none of the above

9. Combustion in compression ignition engines is____________________?

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

10. In order to prevent knock in the S.I. engines, the charge away from the spark plug should have___________________?

    A. low temperature
    B. low density
    C. long ignition delay
    D. rich mixture
    E. all of the above