When trying to use a small pump to deliver lubrication to bearings of a motor for a set period of time, a _____ may be used?

When trying to use a small pump to deliver lubrication to bearings of a motor for a set period of time, a _____ may be used?

• A. Pneumatic timer
• B. Timing relay
• C. Interposing relay
• D. Pilot relay

Answer: (B)

Controlling a small lubrication pump for a precise, limited duration requires a timer-enabled switch. A timing relay combines a relay with an internal timer so that when the lubrication signal is given, the pump is energized for a preset interval and then automatically turns off. This gives you consistent lubrication times without manual intervention and without relying on a separate timer device. The other options don’t provide that built-in, definite-time control: a pneumatic timer is a pneumatic device and not typically used in electrical lubrication circuits; an interposing relay is just for isolating or level-shifting signals; a pilot relay uses a small control signal to operate a larger load but doesn’t include timing functionality.

Controlling a small lubrication pump for a precise, limited duration requires a timer-enabled switch. A timing relay combines a relay with an internal timer so that when the lubrication signal is given, the pump is energized for a preset interval and then automatically turns off. This gives you consistent lubrication times without manual intervention and without relying on a separate timer device. The other options don’t provide that built-in, definite-time control: a pneumatic timer is a pneumatic device and not typically used in electrical lubrication circuits; an interposing relay is just for isolating or level-shifting signals; a pilot relay uses a small control signal to operate a larger load but doesn’t include timing functionality.