The ratio of the indicated thermal efficiency to the air standard efficiency is known as
A. mechanical efficiency
B. overall efficiency
C. relative efficiency
D. volumetric efficiency
Answer:A
The ratio of the indicated thermal efficiency to the air standard efficiency is known as
A. mechanical efficiency B. overall efficiency C. relative efficiency D. volumetric efficiency
Explanation: 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 and mechanical efficiency is the ratio of the brake power to the indicated power.