WASHINGTON ELECTRICIAN
TRAINEE/JOURNEYMAN EXAM – QUESTIONS
AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE |
EXAM PREP | STUDY GUIDE | PRACTICE TEST |
DOWNLOAD INSTANT PDF
1. A journeyman electrician is assigned to install a new 20-amp, 120-volt
branch circuit for receptacles in a commercial office. Which conductor size is
the minimum permitted under the NEC for copper conductors?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
CORRECT ANSWER: B. 12 AWG
RATIONALE: A 20-amp branch circuit requires a minimum of 12 AWG copper
conductors. Fourteen AWG is limited to 15-amp circuits, while 10 AWG and 8
AWG exceed the minimum requirement and are unnecessary unless voltage drop
or other design considerations apply.
2. Before beginning work on an energized electrical panel where de-energizing
is not feasible, what should be completed first?
A. Install warning labels after work begins.
B. Remove all branch circuit breakers.
C. Perform a hazard and risk assessment and wear appropriate PPE.
D. Disconnect the grounding electrode conductor.
CORRECT ANSWER: C. Perform a hazard and risk assessment and wear
appropriate PPE.
,RATIONALE: Electrical safety standards require identifying hazards, assessing arc
flash and shock risks, and using appropriate personal protective equipment
before energized work begins. The other options either create hazards or fail to
address worker safety.
3. Which wiring method provides the greatest protection against physical
damage in an industrial environment?
A. Type NM cable
B. Electrical metallic tubing (EMT)
C. Rigid metal conduit (RMC)
D. Flexible metal conduit (FMC)
CORRECT ANSWER: C. Rigid metal conduit (RMC)
RATIONALE: Rigid metal conduit offers superior mechanical protection and is
commonly used in demanding industrial environments. EMT and FMC provide
less protection, while NM cable is generally not suitable where significant
physical damage is likely.
4. A grounded conductor is commonly identified by which insulation color?
A. Green
B. Gray or white
C. Red
D. Orange
CORRECT ANSWER: B. Gray or white
RATIONALE: The NEC identifies grounded (neutral) conductors using white or
gray insulation. Green is reserved for equipment grounding conductors, while
red and orange are typically used for ungrounded conductors.
5. What is the primary purpose of an equipment grounding conductor?
,A. Carry normal load current
B. Increase operating voltage
C. Provide a low-impedance fault current path
D. Replace overcurrent protection
CORRECT ANSWER: C. Provide a low-impedance fault current path
RATIONALE: Equipment grounding conductors safely carry fault current back to
the source, allowing protective devices to operate quickly. They are not intended
to carry normal load current or replace circuit breakers or fuses.
6. A 15-amp breaker repeatedly trips after additional office equipment is
connected. What is the MOST likely cause?
A. Excessive branch-circuit load
B. Oversized conductors
C. Incorrect conduit type
D. Low ambient temperature
CORRECT ANSWER: A. Excessive branch-circuit load
RATIONALE: Adding more equipment may increase current beyond the breaker's
rating, causing nuisance trips. Oversized conductors and conduit type generally
do not cause overload tripping, while lower temperatures typically improve
conductor performance.
7. Which instrument should be used first to verify that a circuit has been
deenergized?
A. Clamp-on ammeter
B. Non-contact voltage tester followed by an appropriately rated meter
C. Megohmmeter
D. Phase rotation meter
CORRECT ANSWER: B. Non-contact voltage tester followed by an appropriately
rated meter
, RATIONALE: A non-contact tester provides an initial indication, but an adequately
rated voltage meter is required to verify the absence of voltage before work
begins. The remaining instruments serve different testing purposes.
8. Which NEC requirement helps reduce the risk of electric shock in
residential bathrooms?
A. AFCI protection only
B. Weatherproof covers
C. GFCI protection for receptacles
D. Surge protection only
CORRECT ANSWER: C. GFCI protection for receptacles
RATIONALE: Ground-fault circuit interrupter protection rapidly disconnects power
when ground faults occur, significantly reducing shock hazards in bathrooms
and other wet or damp locations.
9. What is the purpose of a circuit breaker?
A. Increase available current
B. Detect low voltage only
C. Protect conductors from overcurrent conditions
D. Regulate system frequency
CORRECT ANSWER: C. Protect conductors from overcurrent conditions
RATIONALE: Circuit breakers protect wiring from overloads and short circuits by
interrupting excessive current. They do not regulate voltage or frequency.
10. During a service upgrade, where is the grounded conductor normally
bonded to the equipment grounding system?
A. At every downstream panelboard
B. At the service disconnecting means
TRAINEE/JOURNEYMAN EXAM – QUESTIONS
AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE |
EXAM PREP | STUDY GUIDE | PRACTICE TEST |
DOWNLOAD INSTANT PDF
1. A journeyman electrician is assigned to install a new 20-amp, 120-volt
branch circuit for receptacles in a commercial office. Which conductor size is
the minimum permitted under the NEC for copper conductors?
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
CORRECT ANSWER: B. 12 AWG
RATIONALE: A 20-amp branch circuit requires a minimum of 12 AWG copper
conductors. Fourteen AWG is limited to 15-amp circuits, while 10 AWG and 8
AWG exceed the minimum requirement and are unnecessary unless voltage drop
or other design considerations apply.
2. Before beginning work on an energized electrical panel where de-energizing
is not feasible, what should be completed first?
A. Install warning labels after work begins.
B. Remove all branch circuit breakers.
C. Perform a hazard and risk assessment and wear appropriate PPE.
D. Disconnect the grounding electrode conductor.
CORRECT ANSWER: C. Perform a hazard and risk assessment and wear
appropriate PPE.
,RATIONALE: Electrical safety standards require identifying hazards, assessing arc
flash and shock risks, and using appropriate personal protective equipment
before energized work begins. The other options either create hazards or fail to
address worker safety.
3. Which wiring method provides the greatest protection against physical
damage in an industrial environment?
A. Type NM cable
B. Electrical metallic tubing (EMT)
C. Rigid metal conduit (RMC)
D. Flexible metal conduit (FMC)
CORRECT ANSWER: C. Rigid metal conduit (RMC)
RATIONALE: Rigid metal conduit offers superior mechanical protection and is
commonly used in demanding industrial environments. EMT and FMC provide
less protection, while NM cable is generally not suitable where significant
physical damage is likely.
4. A grounded conductor is commonly identified by which insulation color?
A. Green
B. Gray or white
C. Red
D. Orange
CORRECT ANSWER: B. Gray or white
RATIONALE: The NEC identifies grounded (neutral) conductors using white or
gray insulation. Green is reserved for equipment grounding conductors, while
red and orange are typically used for ungrounded conductors.
5. What is the primary purpose of an equipment grounding conductor?
,A. Carry normal load current
B. Increase operating voltage
C. Provide a low-impedance fault current path
D. Replace overcurrent protection
CORRECT ANSWER: C. Provide a low-impedance fault current path
RATIONALE: Equipment grounding conductors safely carry fault current back to
the source, allowing protective devices to operate quickly. They are not intended
to carry normal load current or replace circuit breakers or fuses.
6. A 15-amp breaker repeatedly trips after additional office equipment is
connected. What is the MOST likely cause?
A. Excessive branch-circuit load
B. Oversized conductors
C. Incorrect conduit type
D. Low ambient temperature
CORRECT ANSWER: A. Excessive branch-circuit load
RATIONALE: Adding more equipment may increase current beyond the breaker's
rating, causing nuisance trips. Oversized conductors and conduit type generally
do not cause overload tripping, while lower temperatures typically improve
conductor performance.
7. Which instrument should be used first to verify that a circuit has been
deenergized?
A. Clamp-on ammeter
B. Non-contact voltage tester followed by an appropriately rated meter
C. Megohmmeter
D. Phase rotation meter
CORRECT ANSWER: B. Non-contact voltage tester followed by an appropriately
rated meter
, RATIONALE: A non-contact tester provides an initial indication, but an adequately
rated voltage meter is required to verify the absence of voltage before work
begins. The remaining instruments serve different testing purposes.
8. Which NEC requirement helps reduce the risk of electric shock in
residential bathrooms?
A. AFCI protection only
B. Weatherproof covers
C. GFCI protection for receptacles
D. Surge protection only
CORRECT ANSWER: C. GFCI protection for receptacles
RATIONALE: Ground-fault circuit interrupter protection rapidly disconnects power
when ground faults occur, significantly reducing shock hazards in bathrooms
and other wet or damp locations.
9. What is the purpose of a circuit breaker?
A. Increase available current
B. Detect low voltage only
C. Protect conductors from overcurrent conditions
D. Regulate system frequency
CORRECT ANSWER: C. Protect conductors from overcurrent conditions
RATIONALE: Circuit breakers protect wiring from overloads and short circuits by
interrupting excessive current. They do not regulate voltage or frequency.
10. During a service upgrade, where is the grounded conductor normally
bonded to the equipment grounding system?
A. At every downstream panelboard
B. At the service disconnecting means
