ISA UTILITY SPECIALIST (CH. 5: ELECTRICAL KNOWLEDGE) | QUESTIONS AND ANSWERS
| 2026 UPDATE | WITH COMPLETE SOLUTION
What is a volt? - (ANSWER)a unit of electrical force
Electrical resistance determines how much __________ is required to move electricity along a conductor
and is measured in __________. - (ANSWER)energy;
ohms
A conductor carrying more than __________ volts would be considered a NERC line. - (ANSWER)200,000
2 examples of protective equipment: - (ANSWER)circuit breakers
lightning receptors
An energized wire or conductor in a circuit is also known as a __________. - (ANSWER)phase
True or False?
Guy wires are intended to help support poles but may become unintentionally energized. -
(ANSWER)true
A __________ is similar to a fuse or cutout, but it resets after a predetermined time period. -
(ANSWER)re-closer
Minimum working distances for qualified line-clearance arborists are specified in the __________ safety
standard. - (ANSWER)ANSI Z133
When installing underground conductors, __________ should be used in tree root protection zones. -
(ANSWER)tunneling
Distribution transformers typically __________ primary circuit voltage for the end user. -
(ANSWER)reduce
, ISA UTILITY SPECIALIST (CH. 5: ELECTRICAL KNOWLEDGE) | QUESTIONS AND ANSWERS
| 2026 UPDATE | WITH COMPLETE SOLUTION
Amp: - (ANSWER)the measure of electrical current
Service lines and secondary distribution lines usually carry voltage between __________-__________
volts. - (ANSWER)120-240
When a tree contacts one electrical conductor, it may cause a __________-to-__________ fault. -
(ANSWER)phase-ground fault
The minimum approach distance for non-qualified line clearance personnel from energized conductors
50 kV and less: - (ANSWER)10 feet
The condition that allows electricity to flow from one object to another is called: - (ANSWER)potential
What is a Watt? - (ANSWER)a measure of electrical power
A phase-to-phase fault occurs when there is contact between: - (ANSWER)two or more energized
conductors
If the coating on a weatherproofed conductor falls off, the conductor will often __________. -
(ANSWER)deteriorate
Ohm's Law describes the relationship between: - (ANSWER)voltage, current, & resistance
Formula for Ohm's Law: - (ANSWER)Volts = Amps x Resistance
(V = I x R)
Formula for power: - (ANSWER)Power = Volts x Current
(P = V x I)
| 2026 UPDATE | WITH COMPLETE SOLUTION
What is a volt? - (ANSWER)a unit of electrical force
Electrical resistance determines how much __________ is required to move electricity along a conductor
and is measured in __________. - (ANSWER)energy;
ohms
A conductor carrying more than __________ volts would be considered a NERC line. - (ANSWER)200,000
2 examples of protective equipment: - (ANSWER)circuit breakers
lightning receptors
An energized wire or conductor in a circuit is also known as a __________. - (ANSWER)phase
True or False?
Guy wires are intended to help support poles but may become unintentionally energized. -
(ANSWER)true
A __________ is similar to a fuse or cutout, but it resets after a predetermined time period. -
(ANSWER)re-closer
Minimum working distances for qualified line-clearance arborists are specified in the __________ safety
standard. - (ANSWER)ANSI Z133
When installing underground conductors, __________ should be used in tree root protection zones. -
(ANSWER)tunneling
Distribution transformers typically __________ primary circuit voltage for the end user. -
(ANSWER)reduce
, ISA UTILITY SPECIALIST (CH. 5: ELECTRICAL KNOWLEDGE) | QUESTIONS AND ANSWERS
| 2026 UPDATE | WITH COMPLETE SOLUTION
Amp: - (ANSWER)the measure of electrical current
Service lines and secondary distribution lines usually carry voltage between __________-__________
volts. - (ANSWER)120-240
When a tree contacts one electrical conductor, it may cause a __________-to-__________ fault. -
(ANSWER)phase-ground fault
The minimum approach distance for non-qualified line clearance personnel from energized conductors
50 kV and less: - (ANSWER)10 feet
The condition that allows electricity to flow from one object to another is called: - (ANSWER)potential
What is a Watt? - (ANSWER)a measure of electrical power
A phase-to-phase fault occurs when there is contact between: - (ANSWER)two or more energized
conductors
If the coating on a weatherproofed conductor falls off, the conductor will often __________. -
(ANSWER)deteriorate
Ohm's Law describes the relationship between: - (ANSWER)voltage, current, & resistance
Formula for Ohm's Law: - (ANSWER)Volts = Amps x Resistance
(V = I x R)
Formula for power: - (ANSWER)Power = Volts x Current
(P = V x I)
