Technician A says a pressure relief valve opens if the fuel supply line is restricted and pump pressure becomes very high. Technician B says the check valve in the pump prevents fuel from draining out of the fuel system and back into the fuel tank. This helps holds residual pressure in the fuel lines after the pump is turned off. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because a pressure relief valve is designed to open when pressure becomes too high, such as when the fuel supply line is restricted. Technician B is also correct because a check valve prevents fuel from draining back into the tank, maintaining residual pressure in the fuel lines.

Technician a Says a Pressure Relief Valve Opens If the Fuel