Question 24Motor Plants - QMED

The correct answer is D) pumping loss. The power consumed during the scavenging process of a diesel engine is known as the pumping loss. Pumping loss refers to the power required to draw in the fresh air charge and expel the exhaust gases from the engine cylinder during the intake and exhaust strokes. This power consumption is considered a necessary part of the engine's operating cycle and is included in the overall efficiency calculations. The other options are incorrect because they refer to different types of losses in a diesel engine. Compression loss is the power required to compress the air-fuel mixture, valve loss is the power lost due to the opening and closing of the engine valves, and back pressure loss is the power lost due to the resistance of the exhaust system.