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
What role does the 'qualified electrical engineer' play in determining power line clearance requirements for crane operations?
Answer: The engineer can determine the specific voltage and calculate site-specific minimum clearance distances when default OSHA distances cannot be maintained
A qualified electrical engineer can determine the actual voltage of power lines and calculate site-specific clearance distances, enabling operations closer than the OSHA default distances when properly controlled.
What is a 'safety observer' or 'dedicated spotter' in the context of crane operations near power lines?
Answer: A person dedicated exclusively to monitoring crane-to-power line clearance and warning the operator before any encroachment
A dedicated spotter is a person whose sole responsibility is to watch the clearance between the crane and power lines and immediately warn the operator if the crane approaches the required clearance boundary.
How should a crane operator respond to a proximity alarm device that activates during a lift near power lines?
Answer: Immediately stop all crane movement, assess the situation, and do not resume until the power line clearance has been verified
When a proximity alarm activates, the operator must immediately stop all crane movement. The alarm indicates potential encroachment on the minimum clearance zone and must be treated as a real warning, not a false alarm.
What is the required action before a crane is repositioned or swings in an area where power lines may be overhead?
Answer: A qualified person must evaluate the area and confirm that all power line clearances will be maintained throughout the planned movement
Before repositioning or swinging in an area near power lines, a qualified person must evaluate the planned movement and confirm that required clearances will be maintained throughout the entire arc of travel.
According to OSHA 1926.1407, what is required before beginning operations in a 'controlled access zone' established for power line safety?
Answer: All employees who will be working in the zone must be trained to recognize and avoid electrical hazards
OSHA 1926.1407 requires that all employees working in a controlled access zone near power lines must be trained to recognize electrical hazards and know how to avoid them.
A crane is operating near a 345 kV transmission line. What is the minimum required clearance distance per OSHA 1926.1408?
Answer: 20 feet
For transmission lines from 50 kV to 350 kV, OSHA 1926.1408 requires a minimum clearance of 20 feet (or 10 feet plus 0.4 inches per kV above 50 kV, whichever is greater). For 345 kV, the calculation gives 20 feet, which is the applicable minimum.