Thermal efficiency of diesel engine i about 34%

Theoretically correct mixture of air am petrol is approximately 15 : 1

High speed compression engines operate on dual combustion cycle

S.I. engines are quality-governed engines.

exhaust will be smoky

piston rings would stick into piston grooves

exhaust temperature will be high

scavenging occurs.

feeding more fuel

increasing flywheel size

heating incoming air

supercharging

increase

decrease

remain same

increase upto certain limit and then decrease

compression starts at 35° after bottom dead center and ends at top dead center

compression starts at bottom dead center and ends at top dead center

compression starts at 10° before bottom dead center and, ends just before top dead center

may start and end anywhere