Technician A says that a PWM actuator cannot be tested with a DMM. Technician B says the PWM actuator may be tested with a lab scope. Who is correct?
A) Technician A only
B) Technician B only
C) Both Technician A and B
D) Neither Technician A nor B

Question

Quizplus · Accepted Answer

Technician B is correct. A PWM actuator can be tested with a lab scope by monitoring the duty cycle of the PWM signal. A DMM cannot be used because it only measures DC or AC voltage levels and not the on/off frequency.

Technician a Says That a PWM Actuator Cannot Be Tested