Two technicians are describing the exhaust check valves used in AIR (Air Injection Reactor) systems. Technician A says they are used to prevent the output from the AIR pump from entering the intake manifold. Technician B says the check valves are used to keep the exhaust from entering the AIR pump. Who is right?
◦ Technician A
◦ Technician B
◦ Both technicians
◦ Neither technician