In conditional guard locking, which of the following is not one of the conditions that must be satisfied for the guard to be opened?
A) Trapped key -lock clicks off.
B) Machine power contactor is off.
C) Dangerous motion has ceased.
D) Preset interval has elapsed.

Question

Quizplus · Accepted Answer

Trapped key systems operate on the principle of physical keys being transferred to ensure safety procedures are followed. The "lock clicks off" condition does not specifically relate to the principles of conditional guard locking, which typically involve ensuring that machinery is in a safe state (e.g., power off, motion ceased) before allowing access.

In Conditional Guard Locking, Which of the Following Is Not