Evaluate the throat diameter of choke, Mechanical Engineering

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(a) Illustrate why a rich mixture is required for the following

(i) idling (ii) sudden acceleration (iii) Maximum power

(b) A simple jet carburetor is required to supply 5Kg of air and 0.5 Kg of fuel per minute. The fuel specific gravity is 0.75. the air is initially at 1 bar and 300 K. Evaluate the throat diameter of the choke for the flow velocity of 100 m/s. velocity coefficient is 0.8.


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