Answer / naseeb ahmeds

for maintaining the desired preesure in disel engine we use
pressure relief valve.
if our pressure increases in the engine the valve will open
and some part of liquid will pass out to the tank & will
return according to neccessity.

Answer / rahu

presser relief valve is a system in diesel engine which is
use to remove the air from the diesel line (from tank to pump
it is located just before pump.

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