Question 61Motor Plants - 1st Asst/Chief

The correct answer is A) cylinder air starting check valves. During the starting of a diesel engine, the compression gases are prevented from backing into the air starting system by the cylinder air starting check valves. These one-way valves allow air to flow from the air starting system into the engine cylinders, but prevent the compressed gases from the engine from flowing back into the air starting system. This protects the air starting system from any potential damage or interference. The other options are incorrect because: B) the air starting control valve is responsible for regulating the air supply to the engine, not preventing backflow; C) the individual distribution valves distribute the starting air to the individual cylinders, but do not prevent backflow; and D) the high pressure in the starting air manifold alone does not prevent the compression gases from backing into the air starting system.