Internal Combustion Engines
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be

None of the listed here
Remain unaffected
Higher
Lower

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Internal Combustion Engines
The tangential velocity of the water element having a free vortex is

Directly proportional to its distance from the centre
Inversely proportional to its distance from the centre
Inversely proportional to its (distance)2 from the centre
Directly proportional to its (distance)2 from the centre

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