INTERNAL COMBUSTION ENGINES QUIZ

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine

Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls

None of these

High intensity of knock causes crankshaft vibration and the engine runs rough

Starts at 40° after bottom dead center and ends at 10° before top dead center

Starts at 40° before top dead center and ends at 40° after top dead center

Starts at top dead center and ends at 40° before bottom dead center

May start and end anywhere

Steady

Unsteady

Turbulent

Streamline

Reducing the compression ratio

Controlling the exhaust temperature

Controlling the ignition timing

Controlling the air-fuel mixture

To increase the power output of an engine when greater power is required

To reduce space occupied by the engine

All of these

To reduce mass of the engine per brake power

25 to 40

6 to 10

15 to 25

10 to 15

Volumetric efficiency

Clearance volume

Ignition time

Effective compression ratio

100

50

120

Remain same

Decrease

Increase

None of the listed here

Half

Four times

Double

Same