Hazard Identification and Power Line Safety Flashcards
6 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Hazard Identification and Power Line Safety flashcards as text
Under OSHA 29 CFR 1926 Subpart CC, what is the minimum required clearance distance between a crane and an energized power line of unknown voltage?
Answer: 20 feet from any part of the crane or load
OSHA 1926.1408 requires a minimum clearance of 20 feet from energized power lines when the voltage is unknown, until a qualified electrical engineer determines the actual voltage and appropriate clearance.
What procedure should a crane operator follow if the crane makes contact with an energized power line?
Answer: Stay in the cab, warn bystanders not to touch the crane, and attempt to move the crane away from the power line
If the crane contacts an energized power line, the operator should stay in the cab (the safest location), warn all ground personnel to stay away, and try to move the crane away from the line if possible without endangering others.
What is an 'encroachment permit' in the context of crane operations near power lines?
Answer: A written authorization from the power line owner/operator to work within the established clearance distance
An encroachment permit is written authorization from the owner/operator of the power line allowing the crane to operate within the standard minimum clearance distance under specified control conditions.
During a pre-lift site assessment, an operator identifies underground utilities in the crane's planned setup area. What should the operator do?
Answer: Contact the utility locating service (such as 811 in the US) to have utilities marked before positioning the crane
Before positioning a crane, all underground utilities must be identified and marked through the appropriate utility locating service (e.g., 811 in the US) to prevent damage during setup and assess the ground's ability to support crane loads.
What is the purpose of an 'insulating link' (insulator) installed between the crane hook and the load during operations near power lines?
Answer: It breaks the electrical circuit path from the crane to the load, reducing the risk of shock to ground personnel if the crane contacts a power line
An insulating link installed between the hook and the load interrupts the electrical path from the crane to the load, so ground personnel handling the load are not electrocuted if the crane contacts a power line.
What does 'assume all power lines are energized' mean in crane safety practice, and why is this principle important?
Answer: Every overhead power line must be treated as energized and dangerous at all times, regardless of appearance, unless confirmed de-energized and locked out by the utility company
All overhead power lines must be treated as energized at all times unless the utility company has confirmed in writing that they have been de-energized and locked out, regardless of their appearance or apparent service status.