When a relay-logic Wired-Exclusive-NOR gate, formed with the combination NC — NO contacts of two relays and the inverting logic (NC contacts) of a third relay, is employed in a motor control circuit ___

Electrical Engineering MCQ
1

When a relay-logic Wired-Exclusive-NOR gate, formed with the combination NC — NO contacts of two relays and the inverting logic (NC contacts) of a third relay, is employed in a motor control circuit,

When both controlling relays of the inverting-relay solenoid coil are at-rest, the relay-logic output, taken on the load side of the NC inverting-relay contacts in another control line or rung, is __________ (zero or 120) volts.

A) 120
B) either zero or 120
C) neither 120 nor zero
D) zero

Show Answer

Answer:A

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