Question 184Motor Plants - Assistant Engineer

The correct answer is D) individual cam for each pilot valve. In a two-stroke cycle, direct reversing, main propulsion diesel engine, the pilot valves in the air pilot starting system are typically operated by individual cams, rather than a ported distributor disc or other mechanisms. This is because the individual cams provide precise timing and control over the opening and closing of each pilot valve, which is crucial for the proper operation and starting of the diesel engine. The other options, such as a regulator valve (A), a quick opening main air valve (B), or a pilot air start check valve (C), are not directly involved in the operation of the pilot valves and therefore are not the correct answer.