The internal losses in an engine are
A. pumping losses
B. brake losses
C. combustion losses
D. al of the mentioned
Answer:A
The internal losses in an engine are
A. pumping losses B. brake losses C. combustion losses D. al of the mentioned
Explanation: There are only two internal losses, pumping losses and friction losses. During the inlet and exhaust stroke the gaseous pressure on the piston is greater on its forward side, hence during both strokes the piston must be moved against a gaseous pressure, and this causes pumping loss.