Question 451Electricity & Electronics - QMED

The correct answer is B) B and D. The illustration EL-0176 shows several examples of safety disconnect switches. A double-throw switch is one that can connect a circuit to either of two different terminals, effectively breaking the connection to one terminal while making a connection to the other. In the illustration, switches B and D are the only ones that clearly show this double-throw functionality, with three terminals that allow the switch to be connected to either the left or right side. The other switches, A and C, appear to be single-throw switches that simply open or close a single connection. Therefore, based on the definition of a double-throw switch and the visual characteristics of the switches shown, B and D are the correct options that represent a double-throw switch in this illustration.