Technician A says that downflow radiators use a double pass flow principle. Technician B says that a counterflow radiator uses double pass flow routing. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct because a counterflow radiator indeed uses a double pass flow routing, where the coolant flows in the opposite direction to the air passing through the radiator, enhancing cooling efficiency. Downflow radiators do not inherently use a double pass flow principle; they typically have coolant flowing from the top to the bottom.

Technician a Says That Downflow Radiators Use a Double Pass