Technician A says that to perform a maximum output test on a typical heavy-duty truck charging circuit,the engine should be run at 1500 rpm.Technician B says that alternator rpm is typically at least three times engine rpm.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

To perform a maximum output test on a heavy-duty truck's charging circuit, running the engine at 1500 rpm is a common practice because it ensures the alternator is operating at a sufficient speed to produce its maximum output. Technician B is also correct because the pulley ratio between the engine and the alternator is designed such that the alternator spins at a higher RPM than the engine, often at least three times the engine's RPM, to ensure it generates enough power even at lower engine speeds.