Which of the following statements best represents how the start air valve, shown in the illustration, operates to admit starting air to the main engine cylinder? See illustration MO-0054.

Question

Accepted Answer

Control air pressure is applied to the top of the starting valve piston.

Answer

The valve spring exerts downward force on the valve spindle.

Answer

Air pressure from the starting air inlet is applied to the top of the starting valve piston.

Answer

The downward intake stroke of the main engine cylinder draws the starting valve open.

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