The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called
A. mechanical efficiency
B. overall efficiency
C. relative efficiency
D. volumetric efficiency
Answer:A
The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called
A. mechanical efficiency B. overall efficiency C. relative efficiency D. volumetric efficiency
Explanation: Volumetric efficiency is the ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston while mechanical efficiency is the ratio of the brake power to the indicated power and relative efficiency is the ratio of the indicated thermal efficiency to the air standard efficiency whereas overall efficiency is the ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time.