Modulating controls are used to ____.
A) start motors
B) stop motors
C) vary the speed of a motor
D) stop the flow of a liquid

Question

Quizplus · Accepted Answer

Modulating controls are used to vary the speed of a motor. They adjust the output of the device they control in proportion to a signal from a sensor or manually adjusted input signal. This allows for precise control of the speed of the motor, making modulating controls useful in a variety of industrial applications. A and B are incorrect because starting and stopping motors typically require on/off controls, while D describes the function of a valve or shut-off switch.

Modulating Controls Are Used to ____