Motor controlsQuestion 333 of 1506

Lamp Y lights when button A or button B or both are pressed. Which logic function is this?

AND
NAND
XOR
OR

Show answer

Correct answer: OR

OR is false only when no button is pressed. Parallel contacts act this way.

Source: Troubleshooting Motors and Controls (Dickson-Self), 2.3: Introduction to Logic

Questions last reviewed: 18 October 2026

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