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ISA Arborist Test 05: Safety & Operations

Use our Arborist practice questions to test your skills and review key concepts before exam day for your ISA Certified Arborist certification.

ISA Test 05: Safety First

This exam focuses on Safety Standards, Pest Checks, and Tree Growth.

Danger: If a climber is hurt, check for power lines first. Never touch the tree or the person until you know there is no electricity.

Info: The cambium is a thin layer under the bark. It is the only part of the trunk that grows outward to make the tree wider.

Tech Note: "Shall" means you must do it. "Should" is just a good idea. Knowing this difference is vital for safety tests.

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Edited by: Test-Questions.com Editorial Team

Last Updated: April 26, 2026

Q:1A spruce tree has been losing its green color. Your friend shakes the branch over a white sheet of paper. What is he checking for?

for sawfly eggs at the base of the needles

for the presence of spider mites

for shoot tip moth larvae

to see if rust spores are causing the discoloration

Q:2Body thrust refers to

the safest method of lifting heavy objects

a method of ascending a tree

the stage of insect development when the skin is shed to allow for growth

a physiological problem leading to stress cracks

Q:3If the terminal bud is removed in pruning

the branch will die back

flowering is stimulated to enhance fruit production

growth may be stimulated in lateral buds

all of these answers are correct

Q:4Which of the following is true for a lightning protection system to work?

the conductor must not be forked

all of these answers are correct

the tree cannot have grown around the conductors

the conductor must be properly grounded

Q:5What layer of cells is responsible ... [Show Full Question 5]

epidermis

pith

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cortex

Q:6If a worker in a tree is hurt, what is the ... [Show Full Question 6]

Immediately begin an aerial rescue climb.

Call 911 and provide the GPS coordinates.

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Yell to the victim to see if they are conscious.

Q:7When soil is ... [Show Full Question 7]

a high water content will reduce the damaging effects

soil aggregates are broken up giving the soil a finer texture

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micropores combine to form macropores

Q:8Why do trees decline when construction ... [Show Full Question 8]

oxygen availability is reduced.

root growth and expansion may be diminished.

the ability of the roots to absorb water and minerals decreases.

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:8)

Q:9What happens if you put gravel in the bottom ... [Show Full Question 9]

will improve drainage

will prevent the formation of girdling roots

will improve aeration and water infiltration

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Q:10The growth rings ... [Show Full Question 10]

can be counted to approximate a tree's age

are visible because of the rapid growth rate of early wood relative to late wood

can give information about growing conditions in previous years

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:10)

Q:11Which word means a rule is mandatory ... [Show Full Question 11]

Should

May

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Recommended

Q:12What safety gear is required ... [Show Full Question 12]

Hard hat

Protective face shield

Heavy work boots

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:12)

Q:13What is the safest path to take ... [Show Full Question 13]

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:13)

Directly opposite the direction of fall (180 degrees).

At a 90-degree angle to the line of fall.

In the same direction as the fall to outrun the canopy.

Q:14What level of contact is safe when ... [Show Full Question 14]

Direct

Indirect

Direct with electrified lines only

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:14)

Q:15How far away must you stay from power lines ... [Show Full Question 15]

5 feet

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15 feet

25 feet

Q:16What class of rubber gloves is rated ... [Show Full Question 16]

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:16)

Q:17What part of a chainsaw will cause a ... [Show Full Question 17]

Lower portion of base

Upper portion of base

Lower portion of tip

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:17)

Q:18What is the angle of an open-face ... [Show Full Question 18]

45 degree

60 degree

70 degree

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Q:19What is a disadvantage ... [Show Full Question 19]

Cost

Ability to run through a pulley

Ability to elongate

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:19)

Q:20A sling has a 10,000 lb breaking strength and a 5:1 ... [Show Full Question 20]

5,000 lbs

▬▬▬▬▬▬▬▬▬▬▬▬ View Correct Answer (Q:20)

1,000 lbs

50,000 lbs

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Test 05 Study Summary

1. Chainsaw Safety The top of the bar tip is the danger zone. If it hits a log, the saw will kick back toward your face.

2. Soil Drainage Do not put gravel in the bottom of a planting hole. It stops water from draining and can drown the roots.

3. Rigging Math Always divide the breaking strength by the safety factor. A 10,000-pound rope with a 5:1 factor has a 2,000-pound limit.

About This Practice Module

This test contains 20 practice questions covering key topics in Safety & Biology. Use our Arborist practice questions to assess your knowledge and prepare for your official certification exam for your ISA Certified Arborist. Immediate scoring and answer rationales are provided for every question.

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