Which of the following is NOT listed as a use of the Control Relay?

• A. Overcome Contact Restraints
• B. Provide Timing Functions
• C. Provide Machine Memory
• D. Voltage Stabilization

Answer: (D)

Control relays manage circuit actions by switching contacts to sequence operations, provide timing, and preserve a remembered state. They are built to control and coordinate electrical paths, not to regulate the supply voltage.

Overcoming contact restraints—relays can offer multiple, independent contact paths that help ensure the desired circuit state is achieved even if one contact is slow or sticking, improving reliability. Providing timing functions is a common use, as relays and relay networks are frequently employed to create delays between inputs and outputs or to control the order of operations. Providing machine memory comes from latching or holding configurations, where a relay maintains its output state after the input is removed, effectively remembering the last command.

Voltage stabilization, on the other hand, is outside the typical role of a control relay. Stabilizing voltage is the job of regulators, transformers, or dedicated power-management devices.