The hoist limit switch operation should be checked.

The hoist limit switch operation should be checked.

• A. Each shift
• B. Daily
• C. Weekly
• D. Monthly

Answer: (A)

The safety idea here is that hoist limit switches must be tested frequently because they are what stop the hoist when the load reaches the end of travel. Checking the switch operation at the start of each shift ensures any wear, misalignment, wiring fault, or sticking is caught before work begins, reducing the risk of the hook traveling past safe limits during a shift. To test, inspect the switches for damage and obstruction, then move the hoist toward each limit to confirm the switch is activated and power is cut, stopping travel as designed. Make sure the control circuit shows an actual stop and that there’s no bypass or intermittent contact. If a switch doesn’t operate, take the crane out of service and arrange repair. Why this frequency matters: testing once a week or once a month could allow a fault to go unnoticed during daily operations, increasing the chance of over-travel and potential injury or damage. Per-shift testing keeps the protection reliable throughout the workday.

The safety idea here is that hoist limit switches must be tested frequently because they are what stop the hoist when the load reaches the end of travel. Checking the switch operation at the start of each shift ensures any wear, misalignment, wiring fault, or sticking is caught before work begins, reducing the risk of the hook traveling past safe limits during a shift.

To test, inspect the switches for damage and obstruction, then move the hoist toward each limit to confirm the switch is activated and power is cut, stopping travel as designed. Make sure the control circuit shows an actual stop and that there’s no bypass or intermittent contact. If a switch doesn’t operate, take the crane out of service and arrange repair.

Why this frequency matters: testing once a week or once a month could allow a fault to go unnoticed during daily operations, increasing the chance of over-travel and potential injury or damage. Per-shift testing keeps the protection reliable throughout the workday.