Internal Combustion Engines
Detonation is harmful due to

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine
High intensity of knock causes crankshaft vibration and the engine runs rough
Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls
None of these

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
Which one of the following engines will have heavier flywheel than the remaining ones?

30 kW four-stroke diesel engine running at 750 r.p.m.
30 kW two-stroke diesel engine running at 750 r.p.m.
30 kW two-stroke petrol engine running at 1500 r.p.m.
30 kW four-stroke petrol engine running at 1500 r.p.m.

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
A hydraulic ram is a device used to

Store the energy of water
Increase the pressure of water
To lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
To lift water from deep wells

ANSWER DOWNLOAD EXAMIANS APP