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Question

In case petrol engine at starting

isVªksy batu ds fy, 'kq:vkr ds le;

A.

Weak fuel air ratio is needed

B.

Rich fuel-air ratio is needed

C.

Chemically correct fuel air ratio is needed

D.

Any fuel air ritio will do

Answer ( Option B)

Rich fuel-air ratio is needed

Solution

When the A/F mixture is less than stoichiometric then it is called rich mixture

At the time of starting, idling and  at low speed a rich mixture is used because the temperature inside the cylinder is not sufficient  to vaporizes the  fuel    


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