Engine Systems

 

TOTAL MECHANICAL ENGINEERING

Section 1	Section 2	Section 3	Section 4
Section 5	Section 6	Section 7	Section 8

Engine Systems

Quiz

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1. In ignition system Dwell period
   1.   Is directly proportional to engine speed
   2.   Is inversely proportional to engine speed
   3.   does not depends upon engine speed
   4.   None of the above
2. Most commonly used lubrication system in automobile is the
   1.   Splash system
   2.   pressure system
   3.   petrol system
   4.   gravity system
3. The radiator core is made of
   1.   Brass
   2.   Carbon steel
   3.   Cast iron
   4.   Plastic
4. The secondary winding of ignition coil consists of
   1.   Few turns of fine wire
   2.   few turns of thick wire
   3.   many turns of fine wire
   4.   many turns thick wire
5. If the contact breaker gap is small, it results in
   1.   Advanced timing
   2.   increased dwell
   3.   rapid burning of the pointer gaps
   4.   none of these
6. For a four cylinder engine operating at N rpm, the contact breaker must make and break the circuit
   1.   N times
   2.   2N times
   3.   N/2 times
   4.   none of these
7. For a four cylinder vertical engine, the commonly used firing order is
   1.   1-2-3-4
   2.   3-4-1-2
   3.   1-3-4-2
   4.   4-3-2-1
8. Ignition timing is adjusted by
   1.   Tachometer
   2.   stroboscopic light
   3.   stop watch
   4.   accurate clock
9. Choose the correct statement from the following
   1.   Maintenance problem in magneto-ignition system is more
   2.   Magneto ignition system occupies more space
   3.   Magneto ignition system is used in larger four wheelers
   4.   Magneto ignition system has poor quality of spark during starting
10. Battery ignition system
    1.   Occupies more space
    2.   Has more maintenance problem
    3.   is commonly employed in four wheelers
    4.   all of the above
11. Friction that occurs between the layers of oil film is called
    1.   Viscous friction
    2.   greasy friction
    3.   dry friction
    4.   boundary friction
12. The most important property of the lubricant is
    1.   Density
    2.   viscosity
    3.   thermal conductivity
    4.   none of these
13. The lubricants commonly used in the automobiles are
    1.   Mineral oil
    2.   animal oil
    3.   vegetable oil
    4.   cooking oil
14. Oil pressure in the dry sump lubrication system is around
    1.   5 to 10 bar
    2.   11 to 15 bar
    3.   3 to 8 bar
    4.   1 bar
15. Mist lubrication system is mainly used in
    1.   4-S petrol engine
    2.   4-S diesel engine
    3.   2-S petrol engine
    4.   wankel engine
16. Radiator is provided to
    1.   Cool the jacket water
    2.   pressurize the cooling water
    3.   provide additional water flow
    4.   none of these
17. Thermostat is used in radiators to
    1.   Control velocity of water
    2.   Control distribution of water to various cylinders
    3.   control water temperature
    4.   control the pressure of wa
18. Limitations of air cooling systems are
    1.   Applicable only to large engines
    2.   Higher working temperature compared to water cooling
    3.   cooling is fast
    4.   all of the above
19. The main purpose of a thermostat in an engine cooling system is to
    1.   Allow engine to warm-up quickly
    2.   Prevent the coolant from boiling
    3.   pressurize the system
    4.   indicate to the driver the coolant temperature