100+ Free ISA Aerial Lift Specialist Practice Questions

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2026 Statistics

Key Facts: ISA Aerial Lift Specialist Exam

100

Practice Questions

OpenExamPrep

Written Exam Questions

ISA

80%

Passing Score

ISA

+ Skills Test

Hands-On Field Component

ISA

18 mo

Experience Required

ISA

ANSI Z133

Core Safety Standard

ISA / ANSI

The ISA Certified Tree Worker Aerial Lift Specialist is the International Society of Arboriculture's hands-on credential for arborists who perform tree work from an aerial lift or bucket truck. The written knowledge test has 65 multiple-choice questions with an 80% passing score, and candidates must also pass a field skills test. Eligibility requires 18 months of arboriculture experience (including 6 months of aerial lift operation) plus current aerial-rescue, First Aid, and CPR training. The exam covers safety and ANSI Z133, aerial lift operation and inspection, electrical hazard awareness (EHAP), pruning, rigging, tree removal, tree biology and health, and tree identification, with a strong emphasis on aerial lift operation and safety that distinguishes it from the Climber Specialist. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample ISA Aerial Lift Specialist Practice Questions

Try these sample questions to test your ISA Aerial Lift Specialist exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which consensus standard specifically addresses safety requirements for arboricultural operations, including work near electrical conductors?

A.ANSI A300

B.ANSI Z133

C.ANSI A92.2

D.OSHA 1910.269

Explanation: ANSI Z133 is the American National Standard for Arboricultural Operations – Safety Requirements, which governs how tree care work is performed safely, including electrical hazard rules and aerial lift use. It is the primary safety standard tested on the ISA Tree Worker exams.

2Under ANSI Z133, what is the minimum approach distance an arborist who is NOT a qualified line-clearance arborist must maintain from an energized conductor rated up to 50 kV?

A.3 feet

B.6 feet

C.10 feet

D.15 feet

Explanation: ANSI Z133 requires non-qualified (incidental) arborists to keep themselves, their tools, and any conductive object at least 10 feet away from energized conductors up to 50,000 volts. The distance increases as voltage rises above 50 kV.

3What is the FIRST action an operator must perform before using an aerial lift each day?

A.Drive to the worksite and begin pruning

B.Conduct a daily pre-operation inspection of the device and controls

C.Fill the hydraulic reservoir with fresh oil

D.Remove the boom-rest restraints only

Explanation: ANSI A92 and Z133 require a daily (frequent) pre-operation inspection before each use. The operator checks controls, hydraulics, fluid levels, structure, safety devices, and tests the lower and upper controls before performing work to catch failures before lifting.

4When operating from an aerial lift bucket, what fall-protection equipment does ANSI Z133 require the operator to use?

A.A body belt with a 12-foot lanyard

B.A full-body harness with a lanyard attached to the manufacturer's designated anchor point

C.No fall protection is required inside an enclosed bucket

D.A rope grab attached to the climbing line

Explanation: Operators in an aerial lift must wear a full-body harness connected by a lanyard to the boom or bucket anchor point specified by the manufacturer. This prevents ejection if the platform moves suddenly or the operator is thrown.

5Before raising the boom, what ground condition must the operator verify to keep an aerial lift stable?

A.That the surface is firm, level, and capable of supporting the device and outriggers

B.That the ground is moist to improve traction

C.That the truck is parked on a slope facing downhill

D.That at least one outrigger remains retracted for mobility

Explanation: Aerial lifts must be set up on firm, level ground able to support the weight of the truck plus the rated load. Outriggers/stabilizers are deployed onto pads as needed to prevent tipping or sinking during boom operation.

6What is the primary purpose of testing the lower (ground) controls and the upper (platform) controls before an operator enters the bucket?

A.To warm up the hydraulic fluid for faster boom speed

B.To confirm both control stations function and that a ground person can lower the operator in an emergency

C.To satisfy the load chart requirement

D.To recharge the device's battery

Explanation: Checking both upper and lower controls verifies the lift responds correctly and confirms the ground (lower) controls can override and bring the operator down if the upper controls fail or the operator is incapacitated.

7Which type of pruning cut removes a branch back to the branch collar without leaving a stub?

A.Heading cut

B.Flush cut

C.Reduction cut

D.Removal (thinning) cut

Explanation: A removal or thinning cut takes a branch back to its point of origin (the branch collar) so the wound can compartmentalize properly. It does not leave a stub and preserves the branch collar tissue that closes the wound.

8Why should an arborist avoid making a flush cut when removing a branch?

A.It leaves a long stub that decays

B.It removes the branch collar, enlarging the wound and impairing the tree's ability to compartmentalize decay

C.It is faster but uses too much chain oil

D.It promotes excessive water sprout growth at the cut

Explanation: A flush cut removes the protective branch collar, creating a larger wound and cutting through the chemically protected zone the tree uses to wall off decay (CODIT). This slows wound closure and invites pathogens.

9When removing a heavy limb, why is the three-cut method (undercut, top cut, then final cut) used?

A.To make the cut faster with a smaller saw

B.To prevent the bark from tearing down the trunk as the limb falls

C.To leave a longer stub for later removal

D.To sharpen the chain during the cut

Explanation: The three-cut (jump cut) method first undercuts the limb, then cuts from the top further out so the limb drops free, leaving a stub. The final cut removes the stub at the collar. This prevents the falling limb from peeling bark down the trunk.

10Topping a tree is considered an unacceptable practice primarily because it:

A.Permanently dwarfs the tree with no regrowth

B.Creates large wounds, stimulates weakly attached sprouts, and increases future hazard

C.Improves the tree's structural strength

D.Is the recommended method for hazard reduction

Explanation: Topping cuts branches to stubs, leaving large wounds prone to decay and stimulating numerous weakly attached water sprouts. These sprouts are poorly anchored and can fail, making the tree more hazardous over time, not safer.

About the ISA Aerial Lift Specialist Exam

The ISA Certified Tree Worker Aerial Lift Specialist credential validates that an arborist can safely operate an aerial lift (bucket truck) to perform tree care. The written test has 65 multiple-choice questions and requires 80% to pass, and candidates must also pass a hands-on field skills test. It emphasizes aerial lift operation and ANSI Z133 safety, distinct from the Tree Worker Climber Specialist.

Assessment

65 multiple-choice questions on the written knowledge test plus a hands-on field skills test; candidates must pass both. This practice bank is 100 selected-response items covering the written content.

Time Limit

Allotted written exam session, with a separate scheduled field skills evaluation

Passing Score

80%

Exam Fee

~$115 for ISA members and ~$165 for non-members; chapter-sponsored and computer-based testing fees may apply (International Society of Arboriculture (ISA))

ISA Aerial Lift Specialist Exam Content Outline

18%

Safety (Laws, PPE & General Safety)

OSHA and ANSI Z133, head/eye/ear/leg protection, chain saw safety and the chain brake, first aid/CPR, aerial rescue, traffic control, drop zones, and communication

18%

Aerial Lift Operation

Pre-operation inspection, lower/upper control checks, emergency stop, set-up and outriggers, rated capacity and load charts, bucket fall protection, and ANSI A92 periodic inspection

12%

Electrical Hazard Awareness (EHAP)

ANSI Z133 minimum approach distances, direct/indirect contact, step potential, conductive booms and tools, line-contact response, and utility de-energization

14%

Pruning

Removal/reduction/heading cuts, branch collar, thinning, crown raising and reduction, restoration, disinfection, and avoiding topping and lion's tailing

13%

Rigging

Working load limit, knots, carabiners, slings, blocks, friction/lowering devices, shock loading, and rope/hardware inspection

11%

Tree Removal

Tree assessment, felling strategy, notch and back cut, hinge, wedges, escape routes, limbing/bucking, and controlled dismantling from a lift

14%

Tree Health & Sciences

Tree biology, CODIT, hazard recognition (decay, conks, cracks, codominant stems), girdling roots, and cabling/bracing

How to Pass the ISA Aerial Lift Specialist Exam

What You Need to Know

Passing score: 80%
Assessment: 65 multiple-choice questions on the written knowledge test plus a hands-on field skills test; candidates must pass both. This practice bank is 100 selected-response items covering the written content.
Time limit: Allotted written exam session, with a separate scheduled field skills evaluation
Exam fee: ~$115 for ISA members and ~$165 for non-members; chapter-sponsored and computer-based testing fees may apply

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ISA Aerial Lift Specialist Study Tips from Top Performers

1Memorize the ANSI Z133 minimum approach distance: 10 feet from energized lines up to 50 kV for non-qualified arborists, and treat all lines as live until the utility confirms otherwise

2Know the daily aerial lift pre-operation routine: inspect the device, test lower and upper controls, and verify the emergency stop and lower-control override before going aloft

3Understand proper pruning cuts (removal, reduction, heading) and the branch collar, and be able to explain why topping, flush cuts, and lion's tailing are unacceptable

4Study rigging fundamentals: working load limit versus breaking strength, shock loading, letting the piece run, and the roles of the rigging block aloft and the friction device at the base

5Review felling mechanics: the notch directs the fall, the hinge controls it, the back cut sits slightly above the notch, and the escape route runs about 45 degrees back from the fall direction

6Complete all 100 practice questions and review every miss with the AI tutor, then prepare for the hands-on skills test separately

Frequently Asked Questions

How many questions are on the ISA Aerial Lift Specialist written exam and what score do I need?

The written knowledge test has 65 multiple-choice questions and requires 80% to pass. Candidates must also pass a hands-on field skills test to earn the ISA Certified Tree Worker Aerial Lift Specialist credential.

What is the difference between the Aerial Lift Specialist and the Climber Specialist?

Both are ISA Certified Tree Worker credentials and share the same knowledge outline (safety, pruning, rigging, removal, tree sciences, and tree ID). The Aerial Lift Specialist focuses on performing tree work safely from an aerial lift or bucket truck, while the Climber Specialist focuses on rope-and-saddle climbing. The skills tests differ accordingly.

What are the eligibility requirements for the ISA Aerial Lift Specialist?

Candidates need 18 months of arboriculture experience, including at least 6 months operating an aerial lift, plus current training in physical aerial rescue and current First Aid and CPR certification. They must then pass both the written and skills tests.

What topics does the Aerial Lift Specialist written exam cover?

It covers safety and ANSI Z133, aerial lift operation and inspection, electrical hazard awareness (EHAP), pruning, rigging, tree removal, tree health and sciences, and tree identification, with emphasis on aerial lift operation and safety.

What minimum approach distance from power lines should a non-qualified arborist keep?

Under ANSI Z133, an arborist who is not a qualified line-clearance arborist must keep themselves, their tools, and conductive objects at least 10 feet from energized conductors up to 50 kV, with greater distances above 50 kV. Treat all lines as energized until the utility verifies otherwise.

Is this free ISA Aerial Lift Specialist practice as good as paid prep?

Our 100 practice questions cover the same content domains as the ISA Tree Worker exam outline, with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.