Technician A says that instrument panel illumination may be controlled by a rheostat. Technician B says that instrument panel illumination may be controlled by pulse width modulation. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. Instrument panel illumination can be controlled by a rheostat, which adjusts resistance to change brightness, and by pulse width modulation, which adjusts the duty cycle of the power signal to control brightness.

Technician a Says That Instrument Panel Illumination May Be Controlled