CTSP Electrical Hazards and Utility Line Safety

Question 1

Which ANSI standard specifically addresses safety requirements for arboricultural operations, including work near energized electrical conductors?

Accepted Answer

ANSI Z133

Answer

ANSI A300 Part 1

Answer

ANSI B11

Answer

ANSI A10

Question 2

What is the minimum approach distance that unqualified workers must maintain from energized overhead electrical lines up to 50kV?

Accepted Answer

10 feet (3.05 m)

Answer

5 feet (1.52 m)

Answer

15 feet (4.57 m)

Answer

25 feet (7.62 m)

Question 3

Which phenomenon describes the voltage difference between two ground contact points at different distances from a downed energized conductor, creating a shock hazard when walking?

Accepted Answer

Step potential

Answer

Arc flash

Answer

Touch potential

Answer

Ground fault

Question 4

A 'qualified line-clearance arborist' is primarily distinguished from an unqualified worker by having:

Accepted Answer

Training allowing work within the limited approach boundary of energized conductors

Answer

An ISA Certified Arborist credential

Answer

Completion of a 40-hour OSHA safety course

Answer

Ownership of insulated hand tools

Question 5

Which type of rope is required when performing rigging operations in close proximity to energized electrical conductors?

Accepted Answer

A dielectrically tested rope with low moisture absorption

Answer

Standard polyester kernmantle rope

Answer

Manila hemp rope rated for the load

Answer

Wire rope with an insulated outer sheath

Question 6

When a worker contacts a tree that is simultaneously touching an energized overhead conductor, the primary injury mechanism is:

Accepted Answer

Electrocution via a conductive path through the tree and the worker's body to ground

Answer

Ground fault tripping the circuit breaker

Answer

Step potential between the worker's feet

Answer

Arc flash from the conductor surface

Question 7

Utility line-clearance tree work in the United States is primarily governed by which OSHA standard?

Accepted Answer

29 CFR 1910.269

Answer

29 CFR 1910.132

Answer

29 CFR 1926.20

Answer

29 CFR 1910.303