ISA Arboricultural Safe Work Practices 2

Question 1

What is the minimum safe approach distance for a qualified line-clearance arborist working near energized conductors rated at 50 kV or below?

Accepted Answer

10 feet

Answer

ANSI Z133 specifies a minimum approach distance of 10 feet for qualified line-clearance arborists working near conductors energized at 50 kV or below.

Question 2

Before starting any tree work, what is the first step in a job hazard analysis (JHA)?

Accepted Answer

Identifying all potential hazards at the worksite

Answer

A job hazard analysis begins with identifying all potential hazards at the worksite, including overhead utilities, deadwood, ground conditions, and nearby structures.

Question 3

What type of personal protective equipment is required when operating a chainsaw according to ANSI Z133?

Accepted Answer

Hard hat, eye protection, hearing protection, and chainsaw-resistant leg protection

Answer

ANSI Z133 requires comprehensive PPE for chainsaw operation including hard hat, eye protection, hearing protection, and chainsaw-resistant leg protection (chaps or pants).

Question 4

What is the proper procedure when a climber encounters an active bee or wasp nest while ascending a tree?

Accepted Answer

Descend slowly and carefully, then reassess the job plan

Answer

When encountering stinging insects, the safest action is to descend slowly to avoid agitating the colony, then reassess the situation and develop a plan that may include pest control treatment before resuming work.

Question 5

How often should climbing ropes be inspected according to best safety practices?

Accepted Answer

Before each use and at regular intervals during use

Answer

Climbing ropes must be visually and tactilely inspected before each use and at regular intervals during the workday to detect any damage, wear, or contamination that could compromise safety.

(ISA) ISA Certified Arborist Practice Test

(ISA) ISA Certified Arborist Practice Test

ISA Arboricultural Safe Work Practices 2