Technician A says that a pressure check valve should hold system pressure for at least five minutes after the pump is shut off. Technician B says that a defective check valve could cause long cranking time. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician A is correct, as a pressure check valve is designed to hold system pressure for a certain amount of time after the pump is shut off. 
Technician B is also correct, as a defective check valve can cause long cranking time because it can lead to fuel system pressure loss. Hence, both technicians A and B are correct.

Technician a Says That a Pressure Check Valve Should Hold