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25.

In a typical medium speed 4 stroke cycle diesel engine

A.	exhaust valve opens at 35° before bot-tom dead center and closes at 20° after top dead center	B.	exhaust valve opens at bottom dead center and closes at top dead center
C.	exhaust valve opens just after bottom dead center and closes just before top dead center	D.	may open and close anywhere

26.

In a typical medium speed 4-stroke cycle diesel engine

A.	compression starts at 35° after bottom dead center and ends at top dead center	B.	compression starts at bottom dead center and ends at top dead center
C.	compression starts at 10° before bottom dead center and, ends just before top dead center	D.	may start and end anywhere

27.

In a typical medium speed 4-stroke cycle diesel engine the inlet valve

A.	opens at 20° before top dead center and closes at 35° after the bottom dead center	B.	opens at top dead center and closes at bottom dead center
C.	opens at 10° after top dead center and closes 20° before the bottom dead center	D.	may open or close anywhere

28.

In a typical medium speed, 4-stroke cycle diesel engine

A.	fuel injection starts at 10° before to dead center and ends at 20° after tor dead center	B.	fuel injection starts at top dead center and ends at 20° after top dead center
C.	fuel injection starts at just before top dead center and ends just after top dead center	D.	may start and end anywhere

29.

In case of gas turbines, the gaseous fuel consumption guarantees are based on

A.	high heat value	B.	low heat value
C.	net calorific value	D.	middle heat value

30.

In diesel engine the diesel fuel injected intc cylinder would burn instantly at about compressed air temperature of

A.	250°C	B.	500°C
C.	1000°C	D.	150CPC

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