Starting Air Valves

To control the exhaust gas flow from the cylinder

To allow compressed air to enter the cylinder and assist piston movement (correct)

To regulate the fuel intake into the cylinder

To release excess pressure from the cylinder

The starting air valve opens just before the piston reaches top dead centre (TDC) on the compression stroke. (correct)

During the exhaust stroke

At the beginning of the compression stroke

At top dead centre (TDC)

The fuel combustion process is enhanced

The piston movement becomes more efficient

Compressed air escapes during the exhaust and induction strokes (correct)

Exhaust gas is trapped in the cylinder