What is the standard acronym for a switch with a single input and two outputs?

What is the standard acronym for a switch with a single input and two outputs?

• A. SPDT
• B. SPST
• C. DPDT
• D. SSR

Answer: (A)

The idea being tested is how switch terminology describes how many circuits a switch can control and how many paths it can connect. A single input that can connect to two different outputs is a single pole double throw, abbreviated SPDT. It has one common terminal and two outputs, and the position determines which output is connected to the input. The other options don’t fit: SPST is one pole, one throw, so it only connects to a single output; DPDT uses two poles and two throws, meaning two separate circuits are switched; SSR stands for solid-state relay, which is a different device category and not a mechanical switch configuration.

The idea being tested is how switch terminology describes how many circuits a switch can control and how many paths it can connect. A single input that can connect to two different outputs is a single pole double throw, abbreviated SPDT. It has one common terminal and two outputs, and the position determines which output is connected to the input. The other options don’t fit: SPST is one pole, one throw, so it only connects to a single output; DPDT uses two poles and two throws, meaning two separate circuits are switched; SSR stands for solid-state relay, which is a different device category and not a mechanical switch configuration.