Technician A says a pulse-width modulation value of 50% means the valve is open 50% of the time and closed 50% of the time. Technician B says a pulse-width modulation of 255 means that line pressure is increased by 25%. Who is correct?
A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Pulse-width modulation (PWM) of 50% means the signal is on 50% of the time and off 50% of the time. Technician B's statement about PWM of 255 is incorrect as PWM is typically expressed in percentage, not as an absolute number like 255.

Technician a Says a Pulse-Width Modulation Value of 50% Means