Question

an operator ______ is an interlock that prevents the operator from being in harm’s way while the machine is in operation. options: restraint, barrier, guard, emergency stop. buttons: flag, reset, previous, next, go to overview.

Explanation:

To solve this, we analyze each option:

• "Restraint" generally refers to limiting movement but not specifically an interlock for machine safety.
• "Barrier" is more of a physical obstruction, not typically called an "operator [x]" interlock.
• "Guard" in machine safety terms is an interlock (like a safety guard) that prevents the operator from being in danger during machine operation.
• "Emergency stop" is for halting the machine in an emergency, not for preventing the operator from being in harm's way during normal operation.

Answer:

C. Guard