Free practice test — 12 questions with full explanations
Original CraftPATH practice questions. These are not real exam questions. Every answer includes the reasoning, why each wrong option fails, the code area it comes from, and the misconception it targets.
Question 1. In Massachusetts, the journeyman electrician license is designated:
Massachusetts Law and Code Amendments · Medium · Objective: Distinguish the Class A and Class B licenses.
- A. Class A
- B. Class B (correct)
- C. Class C
- D. Class D
Correct answer: B. Class B
Why this is right: Massachusetts designates the master electrician license as Class A and the journeyman license as Class B. A journeyman works under a master's business rather than contracting independently.
Why the other options are wrong:
- A. Class A — Class A is the master electrician license.
- C. Class C — There is no Class C electrician license in this structure.
- D. Class D — There is no Class D electrician license in this structure.
Where this shows up on the job: Pulling permits and contracting directly requires the master license, not the journeyman card.
Code reference: M.G.L. Chapter 141; Board of State Examiners of Electricians
Common misconception: Assuming a journeyman may contract independently.
Question 2. Electrical installations in Massachusetts are judged against:
Massachusetts Law and Code Amendments · Medium · Objective: Identify the governing technical code.
- A. The National Electrical Code exactly as published by NFPA
- B. 527 CMR 12, the Massachusetts Electrical Code, which adopts the NEC with state amendments (correct)
- C. A code written independently by each city or town
- D. The International Building Code alone
Correct answer: B. 527 CMR 12, the Massachusetts Electrical Code, which adopts the NEC with state amendments
Why this is right: Massachusetts adopts the NEC at 527 CMR 12 and amends it. Where an amendment differs from the model code, the amendment governs, and exam questions are written to the amended rules.
Why the other options are wrong:
- A. The National Electrical Code exactly as published by NFPA — The unamended NEC is not the enforced standard.
- C. A code written independently by each city or town — Municipalities enforce the state code rather than writing their own.
- D. The International Building Code alone — The IBC does not contain electrical installation provisions.
Where this shows up on the job: Massachusetts amendments cover items national prep books skip entirely, which is where out-of-state candidates lose points.
Code reference: 527 CMR 12
Common misconception: Studying the NEC without the Massachusetts amendments.
Question 3. The minimum width of working space in front of electrical equipment is:
General Requirements and Code Navigation · Medium · Objective: Apply working space width requirements.
- A. 24 inches or the width of the equipment, whichever is greater
- B. 30 inches or the width of the equipment, whichever is greater (correct)
- C. 36 inches in all cases
- D. The width of the equipment only
Correct answer: B. 30 inches or the width of the equipment, whichever is greater
Why this is right: The working space must be at least 30 inches wide, or the width of the equipment if that is greater, and it must permit at least a 90-degree opening of equipment doors.
Why the other options are wrong:
- A. 24 inches or the width of the equipment, whichever is greater — 24 inches is below the required minimum width.
- C. 36 inches in all cases — 36 inches is a depth value under certain conditions, not the width rule.
- D. The width of the equipment only — Equipment width alone can be less than the required 30 inches.
Where this shows up on the job: The 30-inch width need not be centered on the equipment, which surprises candidates and inspectors alike.
Code reference: NEC 110.26(A)(2)
Common misconception: Believing the working space must be centered on the panel.
Question 4. For a single 12 kW household electric range in a standard dwelling calculation, the demand load is generally taken as:
Branch Circuits, Feeders and Load Calculations · Hard · Objective: Apply range demand load rules.
- A. 12 kW
- B. 8 kW (correct)
- C. 6 kW
- D. 4 kW
Correct answer: B. 8 kW
Why this is right: The demand table for household cooking appliances permits a single range rated not over 12 kW to be calculated at 8 kW, because a range never draws every element at once for a sustained period.
Why the other options are wrong:
- A. 12 kW — Using nameplate ignores the demand table entirely.
- C. 6 kW — 6 kW is not the table value for a single 12 kW range.
- D. 4 kW — 4 kW understates the demand.
Where this shows up on the job: Multiple ranges in a multifamily building use a different column of the same table, which is a common follow-up question.
Code reference: NEC Table 220.55
Common misconception: Adding range nameplate ratings directly into the service calculation.
Question 5. In a standard dwelling calculation, when four or more fastened-in-place appliances are on the same feeder, the code permits a demand factor of:
Branch Circuits, Feeders and Load Calculations · Hard · Objective: Apply fixed appliance demand factors.
- A. 100 percent
- B. 75 percent (correct)
- C. 50 percent
- D. 25 percent
Correct answer: B. 75 percent
Why this is right: With four or more fastened-in-place appliances other than ranges, clothes dryers, space heating and air conditioning, a 75 percent demand factor may be applied because they rarely run simultaneously.
Why the other options are wrong:
- A. 100 percent — 100 percent applies when there are fewer than four such appliances.
- C. 50 percent — 50 percent is not the value in this rule.
- D. 25 percent — 25 percent is not the value in this rule.
Where this shows up on the job: Counting a range or dryer toward the four-appliance threshold is the classic error here.
Code reference: NEC 220.53
Common misconception: Including excluded appliance types in the count.
Question 6. Nonmetallic-sheathed cable must generally be secured within how far of a box with cable clamps?
Wiring Methods, Ampacity and Overcurrent Protection · Hard · Objective: Apply cable support requirements.
- A. 8 inches
- B. 12 inches (correct)
- C. 18 inches
- D. 24 inches
Correct answer: B. 12 inches
Why this is right: The cable must be secured within 12 inches of every box, cabinet or fitting, and supported at intervals not exceeding 4 1/2 feet, so mechanical stress is never transferred to the terminations.
Why the other options are wrong:
- A. 8 inches — 8 inches applies to a single-gang nonmetallic box without clamps, where the cable is secured within 8 inches.
- C. 18 inches — 18 inches exceeds the requirement.
- D. 24 inches — 24 inches exceeds the requirement.
Where this shows up on the job: Unsecured cable dangling into a panel is one of the most frequent rough-inspection corrections.
Code reference: NEC 334.30
Common misconception: Treating the 4 1/2-foot support interval as the only requirement.
Question 7. Nonmetallic-sheathed cable conductor ampacity must be taken from which temperature column?
Wiring Methods, Ampacity and Overcurrent Protection · Hard · Objective: Apply ampacity limits on NM cable.
- A. The 90 degree column
- B. The 60 degree column (correct)
- C. The 75 degree column
- D. Whichever column the terminations allow
Correct answer: B. The 60 degree column
Why this is right: NM cable ampacity is limited to the 60 degree column regardless of the conductor insulation rating, though the 90 degree rating may be used for correction and adjustment calculations.
Why the other options are wrong:
- A. The 90 degree column — The 90 degree rating is only a starting point for derating math.
- C. The 75 degree column — The 75 degree column does not apply to NM cable ampacity.
- D. Whichever column the terminations allow — Termination ratings do not lift the cable's own 60 degree limit.
Where this shows up on the job: This is why 12 AWG NM stays on a 20 ampere circuit even where the conductor is rated 90 degrees.
Code reference: NEC 334.80
Common misconception: Sizing NM cable from the 90 degree column.
Question 8. Which of the following is a standard ampere rating for a fuse or inverse time circuit breaker?
Wiring Methods, Ampacity and Overcurrent Protection · Medium · Objective: Apply overcurrent device standard ratings.
- A. 55 amperes
- B. 45 amperes (correct)
- C. 65 amperes
- D. 85 amperes
Correct answer: B. 45 amperes
Why this is right: The standard ratings list includes 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 and upward. Sizing questions require rounding to a value on that list, usually to the next standard size up where the rule permits.
Why the other options are wrong:
- A. 55 amperes — 55 amperes is not a standard rating.
- C. 65 amperes — 65 amperes is not a standard rating.
- D. 85 amperes — 85 amperes is not a standard rating.
Where this shows up on the job: Memorizing this list saves time on every conductor and device sizing question on the exam.
Code reference: NEC 240.6(A)
Common misconception: Assuming any round number is a standard device rating.
Question 9. The grounding electrode conductor connecting to a made electrode such as a ground rod is never required to be larger than:
Grounding, Bonding and Services · Hard · Objective: Apply grounding electrode conductor sizing.
- A. 8 AWG copper
- B. 6 AWG copper (correct)
- C. 4 AWG copper
- D. 2 AWG copper
Correct answer: B. 6 AWG copper
Why this is right: Where the electrode is a rod, pipe or plate, the portion of the grounding electrode conductor that is the sole connection to it need not exceed 6 AWG copper, because the earth's resistance limits current well below that conductor's capacity.
Why the other options are wrong:
- A. 8 AWG copper — 8 AWG is below the cap for this connection.
- C. 4 AWG copper — 4 AWG is the cap for a concrete-encased electrode connection.
- D. 2 AWG copper — 2 AWG applies to certain other electrode types.
Where this shows up on the job: Each electrode type has its own maximum, which is exactly what the question is testing.
Code reference: NEC 250.66(A)
Common misconception: Sizing every electrode conductor from the service conductor table without applying the caps.
Question 10. Arc-fault circuit interrupter protection is primarily intended to:
Grounding, Bonding and Services · Hard · Objective: Apply AFCI protection requirements.
- A. Protect people from electric shock
- B. Detect arcing faults that can start fires and de-energize the circuit (correct)
- C. Limit voltage drop on long branch circuits
- D. Replace overcurrent protection
Correct answer: B. Detect arcing faults that can start fires and de-energize the circuit
Why this is right: An AFCI recognizes the electrical signature of an unwanted arc, such as a damaged cord or a nail through cable, and opens the circuit before it ignites nearby material. GFCI protection is the shock-protection device.
Why the other options are wrong:
- A. Protect people from electric shock — Shock protection is the GFCI's job.
- C. Limit voltage drop on long branch circuits — Voltage drop is a design consideration, not a protective function.
- D. Replace overcurrent protection — AFCI protection supplements rather than replaces overcurrent protection.
Where this shows up on the job: Shared neutrals and certain motor loads cause nuisance trips, which usually reveals a real wiring problem rather than a bad device.
Code reference: NEC 210.12
Common misconception: Confusing AFCI and GFCI functions.
Question 11. Overcurrent protection for a transformer secondary is primarily intended to protect:
Motors, Transformers, Fire Alarm and Special Systems · Hard · Objective: Apply transformer secondary conductor concepts.
- A. The transformer core against saturation
- B. The secondary conductors, which are not protected by the primary device (correct)
- C. The primary conductors only
- D. Nothing; primary protection is always sufficient
Correct answer: B. The secondary conductors, which are not protected by the primary device
Why this is right: Because the transformer changes voltage and current, a primary overcurrent device does not reliably protect the secondary conductors. Secondary protection sized to those conductors is required except where a specific rule permits otherwise.
Why the other options are wrong:
- A. The transformer core against saturation — Saturation is a design and application issue, not an overcurrent function.
- C. The primary conductors only — Primary conductors are protected by the primary device.
- D. Nothing; primary protection is always sufficient — Relying on primary protection alone leaves the secondary conductors exposed.
Where this shows up on the job: Unprotected secondary taps running across a mechanical room are a serious and commonly cited hazard.
Code reference: NEC 240.21(C) and Article 450
Common misconception: Assuming one device protects both sides of a transformer.
Question 12. Power-limited fire alarm circuit cables must be:
Motors, Transformers, Fire Alarm and Special Systems · Medium · Objective: Apply fire alarm circuit identification.
- A. Run in the same raceway as branch circuit power conductors for convenience
- B. Separated from power conductors and identified at terminations and junctions (correct)
- C. Installed only by a licensed fire sprinkler contractor
- D. Left unmarked to prevent tampering
Correct answer: B. Separated from power conductors and identified at terminations and junctions
Why this is right: Power-limited fire alarm circuits must be separated from electric light and power conductors and identified at terminals and junction points so the system remains distinguishable and its integrity is not compromised during future work.
Why the other options are wrong:
- A. Run in the same raceway as branch circuit power conductors for convenience — Mixing power-limited circuits with power conductors is prohibited except under specific conditions.
- C. Installed only by a licensed fire sprinkler contractor — Fire alarm wiring is electrical work, not sprinkler work.
- D. Left unmarked to prevent tampering — Identification is required, not discouraged.
Where this shows up on the job: Unidentified life-safety wiring gets damaged during renovations, which is exactly what the marking rule prevents.
Code reference: NEC Article 760
Common misconception: Treating low-voltage life-safety wiring as unregulated.
How to study for the Massachusetts journeyman electrician exam
Read the Massachusetts amendments first
527 CMR 12 adopts the NEC and then amends it, and those amendments are where out-of-state candidates and national prep books fall short. Read the amendment package start to finish once, flag every deviation from the model code, and keep that list beside you while you drill.
Confirm your hours and classroom credit early
Eligibility rests on documented on-the-job hours under licensed supervision plus required classroom instruction. Verify both are recorded and accepted well before you apply, because a denial at that stage costs months.
Build code navigation speed
Tab Articles 100, 110, 210, 220, 240, 250, 300, 310, 314, 334, 430, 450 and 760, plus Chapter 9 and Annex C. If any lookup takes more than 45 seconds under a stopwatch, retab it.
Own the calculations
Work the standard-method dwelling service calculation until every step is reflexive, then drill ampacity problems where the cable limit, ambient correction, conductor-count adjustment and termination temperature all apply in sequence.
Run a six-week plan
Week one: Massachusetts law, amendments and definitions. Week two: branch circuits, feeders and load calculations. Week three: wiring methods, ampacity and overcurrent protection. Week four: grounding, bonding and services. Week five: motors, transformers, fire alarm and special systems. Week six: full-length timed sets under exam conditions.
Frequently asked questions
What is the difference between Class A and Class B?
Class A is the master electrician license and Class B is the journeyman license. A journeyman performs electrical work under a master's business rather than contracting independently.
Which code does the exam use?
527 CMR 12, the Massachusetts Electrical Code, which adopts the National Electrical Code with Massachusetts amendments. The amendments are examinable.
How many hours of experience do I need?
The board sets on-the-job hour and classroom instruction requirements by rule and revises them periodically, so we leave those figures pending. Confirm with the board before applying.
Is the exam open book?
The board publishes the permitted references and exam format in its current examination information. Check that bulletin before you schedule.
Is there continuing education?
Massachusetts requires continuing education for renewal. The hour count and renewal interval are set by the board, so confirm the current requirement at renewal.
Are these real Massachusetts exam questions?
No. Every question here is original CraftPATH material written to the same subject areas the exam covers. We do not reproduce live examination content.
How long should I study?
Most apprentices need six to ten weeks of focused review, weighted toward load calculations, ampacity and wiring method rules, grounding, and the Massachusetts amendments.