ISA Arborist Safety and Standards Questions and Answers

Question 1

An arborist must prune branches from a tree canopy that is growing within the minimum approach distance of a 7,200-volt primary distribution line.
According to ANSI Z133 standards, what is the closest a qualified line-clearance arborist is permitted to approach this conductor?

Accepted Answer

2 feet, 2 inches

Answer

10 feet, 0 inches

Answer

1 foot, 7 inches

Answer

As close as necessary with insulated tools

Question 2

According to ANSI Z133 safety standards, which of the following is a prohibited practice when starting a chainsaw on a work site?

Accepted Answer

Drop-starting the saw by holding it in one hand and pulling the starter cord with the other.

Answer

Starting the saw on level ground with a foot securing the rear handle.

Answer

Using the leg-lock method with the saw handle placed between the thighs.

Answer

Engaging the chain brake before pulling the starter cord.

Question 3

A tree care crew is preparing for the day's work, which includes one climber and two ground workers. According to ANSI Z133, what is the minimum requirement for emergency readiness on this crew?

Accepted Answer

At least one worker on site must be trained in aerial rescue procedures.

Answer

All three crew members must be certified in first aid and CPR.

Answer

The company must have a written emergency plan for every tree being worked on.

Answer

The job site must be within a 15-minute response time of a hospital.

Question 4

Which of the following best describes the primary hazard associated with "negative blocking" or "negative rigging" during tree removal operations?

Accepted Answer

It generates significant shock loading and dynamic forces on the rigging system.

Answer

It causes excessive friction and heat buildup on the rigging rope.

Answer

It requires a complex knot system that is difficult for ground workers to manage.

Answer

It is only effective for removing small-diameter, lightweight limbs.

Question 5

An arborist is setting their climbing line using a moving rope system (MRS) with a friction hitch. Before leaving the ground, what is the most critical safety check that must be performed on the climbing system?

Accepted Answer

Testing the hitch to confirm it grips the rope securely and releases when intended.

Answer

Ensuring all carabiners are made of steel for maximum strength.

Answer

Verifying the climbing line has a diameter of exactly 1/2 inch (13mm).

Answer

Measuring the length of the friction cord to ensure it matches the rope diameter.

Question 6

Which set of Personal Protective Equipment (PPE) is required by ANSI Z133 for a ground worker operating a chainsaw?

Accepted Answer

Head protection, eye protection, hearing protection, and cut-resistant leg protection.

Answer

Hard hat and steel-toed boots only.

Answer

Hearing protection, eye protection, and gloves.

Answer

A high-visibility vest and work boots.

An arborist must prune branches from a tree canopy that is growing within the minimum approach distance of a 7,200-volt primary distribution line.According to ANSI Z133 standards, what is the closest a *qualified* line-clearance arborist is permitted to approach this conductor?

An arborist must prune branches from a tree canopy that is growing within the minimum approach distance of a 7,200-volt primary distribution line.
According to ANSI Z133 standards, what is the closest a qualified line-clearance arborist is permitted to approach this conductor?