An automobile carburettor having its float chamber vented to the atmosphere is tested at sea level conditions in the factory without an air cleaner. The main metering system of this carburettor is found to yield a fuel-air ratio of 0.065. The venturi throat pressure is 0.84 bar. The carburetor is now installed in an automobile and air cleaner is placed on the inlet to carburetor. The air flow rate with and without the air filter is 230 kg/hr. The pressure drop through the filter is found to be 0.035 bar at sea level conditions. Assuming z = 0 and orifice coefficient to be constant calculate
(i) the venturi throat pressure with the air cleaner
(ii) fuel-air ratio with the air cleaner.
Assume incompressible flow.