Question 60Motor Plants - QMED70% to pass
During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, shown in the illustration, by the__________. Illustration MO-0046
AI Explanation
The correct answer is A) cylinder air starting check valves.
The cylinder air starting check valves prevent compression gases from backing into the air starting system during the starting of a diesel engine. These check valves allow air to flow from the starting air manifold into the engine cylinders, but not in the reverse direction. This ensures that the high-pressure air is directed into the cylinders to start the engine, rather than allowing the compression gases to flow back into the air starting system.
The other options are incorrect because: B) high-pressure in the starting air manifold does not directly prevent the backflow, C) the air starting control valve controls the supply of air to the engine, but does not prevent backflow, and D) individual distribution valves distribute the air to the cylinders, but do not specifically prevent backflow.
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