Referring to a control circuit, what device is used to control the operation of a number of different loads?

• A. Interposing six-pole relay
• B. Solid-state relay
• C. Pushbutton block
• D. Contactor

Answer: (A)

Relays let one control signal switch multiple load circuits while keeping the control side isolated from the load side. An interposing relay sits between the control circuit and the loads, acting as a bridge that translates a low-power control signal into the switching action for the loads. A six-pole version provides six separate contacts, so one device can independently energize or de-energize several loads from the same control input. That multi-pole capability is exactly what’s needed when you want to control a number of different loads with a single control action, making it the best fit for this scenario.

The other options don’t fit as neatly. A pushbutton block is just a user input device and doesn’t switch multiple loads. A solid-state relay can switch loads but doesn’t inherently offer multiple isolated outputs in a single package. A cont actor is used for switching higher-current loads and often focuses on a single circuit or few contacts, whereas the interposing six-pole relay explicitly provides multiple switched paths in one device.