Question

technician a says that the egr valve does not function at idle. technician b says that the egr valve will not function during wot. who is correct?
a. technician a
b. technician b
c. both technician a and technician b
d. neither technician a nor technician b

Explanation:

• The EGR (Exhaust Gas Recirculation) valve is designed to reduce nitrogen oxide emissions.
• At idle, the engine needs a stable air - fuel mixture for smooth operation. Recirculating exhaust gas (which is what the EGR valve does) at idle can disrupt this mixture, so the EGR valve does not function at idle.
• During Wide - Open Throttle (WOT), the engine requires maximum power. Recirculating exhaust gas would reduce the power output as it dilutes the air - fuel mixture. So, the EGR valve does not function during WOT.

Answer:

c. Both Technician A and Technician B