Set 3 - E -Pariksha Online previous questions on MEK Motor for MEO class 4

1. The light and medium fuels utilized in internal combustion engines provide a source of
choose one lubrication for pistons and rings food for microbiological organisms gases most detrimental to the ozone layer of the atmosphere all of the above

2. A very sudden rise in pressure during combustion accompanied by a metallic, hammer like sound is called knocking of the unit or detonation and usually occurs
choose one Near the end of the pressure rise after ignition of fuel charge. Just before the fuel charge is about to ignite. Immediately after the unit reaches peak pressure and before ignition of fuel charge. At any stage of the combustion process

3. Automatic combustion control systems for some auxiliary boilers are designed to cycle burners on in response to
choose one low fuel pressure fuel return pressure low steam pressure furnace air pressure

4. One of the major disadvantages of constant pressure turbocharging over pulse pressure turbocharging is :
choose one Reduction in specific fuel consumption Lengthening of effective stroke leading to greater expansion in engine Poor turbocharging efficiency Inability of the system to operate at low loads and slow response during acceleration

5. Following method is sometimes used in constant pressure turbochargers of a 4-stroke diesel alternators during starting and rapid acceleration :
choose one Auxiliary electrical blowers assisting turbochargers during starting Auxiliary shaft driven blowers assisting turbochargers during starting Auxiliary air drive for turbocharger acceleration during starting Variable geometry turbocharging

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