Before putting idle derricks back into operation, a complete inspection is required if they have been idle for more than how many months?

Before putting idle derricks back into operation, a complete inspection is required if they have been idle for more than how many months?

• A. 6 months
• B. 4 months
• C. 8 months
• D. 10 months

Answer: (A)

Six months of idle time triggers a complete inspection before putting a derrick back into service. When a crane or derrick sits unused for an extended period, hidden issues can develop—corrosion, moisture intrusion, lubrication breakdown, or wear in critical parts like wire rope, pins, sheaves, and structural members. A complete inspection, performed by a qualified person, verifies that all safety-critical components are in good condition and that the controls, brakes, safety devices, and load-handling gear function properly. This thorough check helps prevent failures once the equipment is reloaded. If the idle period is shorter than six months, a less extensive inspection might be allowed, but the standard specifies the full inspection after six months of inactivity.

Six months of idle time triggers a complete inspection before putting a derrick back into service. When a crane or derrick sits unused for an extended period, hidden issues can develop—corrosion, moisture intrusion, lubrication breakdown, or wear in critical parts like wire rope, pins, sheaves, and structural members. A complete inspection, performed by a qualified person, verifies that all safety-critical components are in good condition and that the controls, brakes, safety devices, and load-handling gear function properly. This thorough check helps prevent failures once the equipment is reloaded. If the idle period is shorter than six months, a less extensive inspection might be allowed, but the standard specifies the full inspection after six months of inactivity.