231) Which one of the following engines will have heavier flywheel than the remaining ones?

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

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

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

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

Answer is:

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

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

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

none of the above

Answer is:

steam power plant

gas turbine power plant

hydro electric power plant

nuclear power plant

Answer is:

15%

30%

50%

70%

Answer is:

arrangement of the cylinders

design of crankshaft

number of cylinders

all of these

Answer is:

Explanation:

The firing order in an I.C. engine depends upon
* arrangement of the cylinders
* design of crankshaft
* number of cylinders