Page 1 of 127
ISA UTILITY SPECIALIST ACTUAL EXAM 2026
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf.
1. In the U.S., enforcement of safety work rules for line-
clearance arborists resides with which agency?
A) EPA (Environmental Protection Agency)
B) ANSI (American National Standards Institute)
C) OSHA (Occupational Safety & Health Administration)
D) NERC (North American Electric Reliability Corporation)
Correct Answer: C) OSHA
Rationale: OSHA is the federal agency responsible for enforcing
workplace safety regulations, including 29 CFR 1910.269 and
29 CFR 1926, which govern line-clearance tree trimming. ANSI
develops standards (Z133), but OSHA enforces them .
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2. What is the primary purpose of "Utility Pruning" as defined
by industry standards?
A) To maximize timber yield from rights-of-way
B) To ensure reliable service and public safety near power lines
C) To improve the aesthetic shape of street trees
D) To prepare trees for transplanting
Correct Answer: B) To ensure reliable service and public safety
near power lines
Rationale: Utility pruning specifically addresses vegetation near
conductors to prevent outages and fire hazards, not for timber or
general aesthetics .
3. NERC (North American Electric Reliability Corporation)
standards for vegetation management are specifically
applicable to what voltage level?
A) All distribution lines (under 69kV)
B) Transmission lines operating at 200 kV and above
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C) Secondary service drops (120/240V)
D) Only underground cables
Correct Answer: B) Transmission lines operating at 200 kV and
above
Rationale: NERC FAC-003 standards mandate vegetation
management for bulk electric system transmission lines typically
200kV and above to prevent cascading outages .
4. According to ANSI Z133, what is the Minimum Approach
Distance (MAD) for a qualified line-clearance arborist (not an
apprentice) for voltages 50 kV or less?
A) 2 feet
B) 5 feet
C) 10 feet
D) 20 feet
Correct Answer: C) 10 feet
Rationale: ANSI Z133 specifies 10 feet for qualified line-
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clearance arborists for 50kV and below. Unqualified personnel
require greater distances (typically 10 feet plus scaling factor) .
5. Which of the following is a voluntary consensus standard
for tree care operations, including pruning, trimming, and
removal?
A) OSHA 1910.269
B) ANSI Z133
C) NFPA 70E
D) EPA FIFRA
Correct Answer: B) ANSI Z133
Rationale: ANSI Z133 is the national standard for arboricultural
safety. "Voluntary" means it is not a federal law unless adopted
by a state, but it is the industry benchmark for negligence
lawsuits .
6. Who is responsible for ensuring a "Job Briefing" (tailgate
meeting) is conducted before work begins?
ISA UTILITY SPECIALIST ACTUAL EXAM 2026
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf.
1. In the U.S., enforcement of safety work rules for line-
clearance arborists resides with which agency?
A) EPA (Environmental Protection Agency)
B) ANSI (American National Standards Institute)
C) OSHA (Occupational Safety & Health Administration)
D) NERC (North American Electric Reliability Corporation)
Correct Answer: C) OSHA
Rationale: OSHA is the federal agency responsible for enforcing
workplace safety regulations, including 29 CFR 1910.269 and
29 CFR 1926, which govern line-clearance tree trimming. ANSI
develops standards (Z133), but OSHA enforces them .
,Page 2 of 127
2. What is the primary purpose of "Utility Pruning" as defined
by industry standards?
A) To maximize timber yield from rights-of-way
B) To ensure reliable service and public safety near power lines
C) To improve the aesthetic shape of street trees
D) To prepare trees for transplanting
Correct Answer: B) To ensure reliable service and public safety
near power lines
Rationale: Utility pruning specifically addresses vegetation near
conductors to prevent outages and fire hazards, not for timber or
general aesthetics .
3. NERC (North American Electric Reliability Corporation)
standards for vegetation management are specifically
applicable to what voltage level?
A) All distribution lines (under 69kV)
B) Transmission lines operating at 200 kV and above
,Page 3 of 127
C) Secondary service drops (120/240V)
D) Only underground cables
Correct Answer: B) Transmission lines operating at 200 kV and
above
Rationale: NERC FAC-003 standards mandate vegetation
management for bulk electric system transmission lines typically
200kV and above to prevent cascading outages .
4. According to ANSI Z133, what is the Minimum Approach
Distance (MAD) for a qualified line-clearance arborist (not an
apprentice) for voltages 50 kV or less?
A) 2 feet
B) 5 feet
C) 10 feet
D) 20 feet
Correct Answer: C) 10 feet
Rationale: ANSI Z133 specifies 10 feet for qualified line-
, Page 4 of 127
clearance arborists for 50kV and below. Unqualified personnel
require greater distances (typically 10 feet plus scaling factor) .
5. Which of the following is a voluntary consensus standard
for tree care operations, including pruning, trimming, and
removal?
A) OSHA 1910.269
B) ANSI Z133
C) NFPA 70E
D) EPA FIFRA
Correct Answer: B) ANSI Z133
Rationale: ANSI Z133 is the national standard for arboricultural
safety. "Voluntary" means it is not a federal law unless adopted
by a state, but it is the industry benchmark for negligence
lawsuits .
6. Who is responsible for ensuring a "Job Briefing" (tailgate
meeting) is conducted before work begins?
