The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is_______________?

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Crankcase explosion in I.C. engines usuall occurs as ___________________?

A. first a mild explosion followed by a bi explosion B. first a big explosion followed by a mil explosion C. both mild and big explosions occi simultaneously D. never occurs E. unpredictable...

Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows ________________?

A. using additives in the fuel B. engine derating i.e. reducing the maxi-mum flow of fuel C. increasing the compression ratio D. adherence to proper fuel specification E. avoidance of overloading...

The actual volume of fresh charge admitted in 4-stroke petrol engine is_________________?

A. equal to stroke volume B. equal to stroke volume and clearance volume C. less than stroke volume D. more than stroke volume E. more than cylinder volume...

Auto-ignition temperature is____________________?

A. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame B. temperature at which it solidifies or congeals C. that at which it catches fire without external aid D. indicated by 90% distillation temperature, i.e., when 90% … Auto-ignition temperature is____________________?Read More...

Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________?

A. Lean mixture B. Chemically correct fuel air ratio C. Rich mixture D. Unpredictable...