Nfpa 70E Arc Flash Risk
Assessment Practice Exam
Practice
Questions And Correct
Answers (Verified
Answers) Plus Rationale 2026
Q&A|
Instant Download Pdf
1. What is the primary purpose of an arc-flash risk assessment?
A. Determine the electrical system's efficiency
B. Calculate utility billing demand
C. Determine the likelihood of occurrence and potential severity of
an arc-flash event and select appropriate protective measures
D. Determine conductor ampacity
Rationale: An arc-flash risk assessment evaluates the likelihood and
severity of an arc-flash incident and identifies measures to reduce
risk.
,2. Which condition generally increases the likelihood of an arc-flash
incident?
A. De-energizing equipment
B. Installing barriers
C. Performing work on exposed energized conductors or circuit
parts
D. Increasing illumination
Rationale: Interaction with exposed energized parts can introduce
conditions that may initiate an arc flash.
3. What is the preferred condition for electrical work whenever
feasible?
A. Energized work
B. Work inside the arc-flash boundary
C. Electrically safe work condition
D. Work with minimum PPE
Rationale: Establishing an electrically safe work condition is the
preferred approach when feasible.
4. What is an electrically safe work condition?
A. Equipment that has a low arc-flash energy level
B. Equipment protected by PPE
C. A state in which electrical conductors and circuit parts have been
disconnected, locked/tagged, tested, and otherwise verified as de-
energized as applicable
D. Equipment operating at less than 600 V
Rationale: An electrically safe work condition requires appropriate
de-energization and verification procedures.
5. Which activity is normally performed to verify absence of
voltage?
,A. Visual inspection only
B. Checking the equipment nameplate
C. Using an adequately rated test instrument
D. Checking the circuit breaker handle
Rationale: Absence of voltage must be verified with an appropriate
test instrument.
6. What should be done with a voltage tester before testing for
absence of voltage?
A. Remove its batteries
B. Verify that the tester is functioning properly
C. Place it in a toolbox
D. Set it to resistance mode
Rationale: A properly functioning test instrument is necessary for
reliable verification.
7. What is the arc-flash boundary?
A. The distance at which shock ceases to exist
B. The equipment's enclosure boundary
C. The distance from an exposed energized electrical conductor or
circuit part within which a person could receive a second-degree
burn
D. The minimum approach distance for cranes
Rationale: The arc-flash boundary is based on the potential for a
second-degree burn from an arc-flash incident.
8. What does incident energy describe?
A. The voltage available at a receptacle
B. The current carried by a transformer
C. The amount of thermal energy imposed on a surface at a
specified distance during an arc-flash event
D. The energy stored in a battery
, Rationale: Incident energy is commonly expressed in cal/cm² and is
used to determine arc-rated PPE requirements.
9. Which unit is commonly used for incident energy?
A. Ohms
B. Joules per ampere
C. cal/cm²
D. kVA
Rationale: Arc-flash incident energy is commonly expressed in
calories per square centimeter.
10. What is the purpose of arc-rated clothing?
A. Prevent electric shock in all circumstances
B. Increase conductor ampacity
C. Reduce the severity of injury from thermal energy associated
with an arc flash
D. Eliminate the need for approach boundaries
Rationale: Arc-rated clothing is designed to reduce burn injury from
arc-flash thermal energy.
11. Arc-rated PPE is selected primarily based on:
A. Equipment color
B. Employee age
C. The anticipated incident energy or applicable PPE category
requirements
D. Circuit conductor color
Rationale: PPE must provide protection appropriate to the assessed
arc-flash hazard.
12. What does ATPV mean?
Assessment Practice Exam
Practice
Questions And Correct
Answers (Verified
Answers) Plus Rationale 2026
Q&A|
Instant Download Pdf
1. What is the primary purpose of an arc-flash risk assessment?
A. Determine the electrical system's efficiency
B. Calculate utility billing demand
C. Determine the likelihood of occurrence and potential severity of
an arc-flash event and select appropriate protective measures
D. Determine conductor ampacity
Rationale: An arc-flash risk assessment evaluates the likelihood and
severity of an arc-flash incident and identifies measures to reduce
risk.
,2. Which condition generally increases the likelihood of an arc-flash
incident?
A. De-energizing equipment
B. Installing barriers
C. Performing work on exposed energized conductors or circuit
parts
D. Increasing illumination
Rationale: Interaction with exposed energized parts can introduce
conditions that may initiate an arc flash.
3. What is the preferred condition for electrical work whenever
feasible?
A. Energized work
B. Work inside the arc-flash boundary
C. Electrically safe work condition
D. Work with minimum PPE
Rationale: Establishing an electrically safe work condition is the
preferred approach when feasible.
4. What is an electrically safe work condition?
A. Equipment that has a low arc-flash energy level
B. Equipment protected by PPE
C. A state in which electrical conductors and circuit parts have been
disconnected, locked/tagged, tested, and otherwise verified as de-
energized as applicable
D. Equipment operating at less than 600 V
Rationale: An electrically safe work condition requires appropriate
de-energization and verification procedures.
5. Which activity is normally performed to verify absence of
voltage?
,A. Visual inspection only
B. Checking the equipment nameplate
C. Using an adequately rated test instrument
D. Checking the circuit breaker handle
Rationale: Absence of voltage must be verified with an appropriate
test instrument.
6. What should be done with a voltage tester before testing for
absence of voltage?
A. Remove its batteries
B. Verify that the tester is functioning properly
C. Place it in a toolbox
D. Set it to resistance mode
Rationale: A properly functioning test instrument is necessary for
reliable verification.
7. What is the arc-flash boundary?
A. The distance at which shock ceases to exist
B. The equipment's enclosure boundary
C. The distance from an exposed energized electrical conductor or
circuit part within which a person could receive a second-degree
burn
D. The minimum approach distance for cranes
Rationale: The arc-flash boundary is based on the potential for a
second-degree burn from an arc-flash incident.
8. What does incident energy describe?
A. The voltage available at a receptacle
B. The current carried by a transformer
C. The amount of thermal energy imposed on a surface at a
specified distance during an arc-flash event
D. The energy stored in a battery
, Rationale: Incident energy is commonly expressed in cal/cm² and is
used to determine arc-rated PPE requirements.
9. Which unit is commonly used for incident energy?
A. Ohms
B. Joules per ampere
C. cal/cm²
D. kVA
Rationale: Arc-flash incident energy is commonly expressed in
calories per square centimeter.
10. What is the purpose of arc-rated clothing?
A. Prevent electric shock in all circumstances
B. Increase conductor ampacity
C. Reduce the severity of injury from thermal energy associated
with an arc flash
D. Eliminate the need for approach boundaries
Rationale: Arc-rated clothing is designed to reduce burn injury from
arc-flash thermal energy.
11. Arc-rated PPE is selected primarily based on:
A. Equipment color
B. Employee age
C. The anticipated incident energy or applicable PPE category
requirements
D. Circuit conductor color
Rationale: PPE must provide protection appropriate to the assessed
arc-flash hazard.
12. What does ATPV mean?
