Internal Combustion Engines
Which of the following is false statement?Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

Piston ring and cylinder wear
Formation of hard coating on piston skirts
Oil sludge in the engine crank case
Detonation

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Internal Combustion Engines
In a four stroke cycle petrol engine, the inlet valve

Opens at 20° before top dead center and closes at 40° after bottom dead center
Opens at top dead center and closes at bottom dead center
May open or close anywhere
Opens at 20° after top dead center and closes at 20° before bottom dead center

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