Download MARYLAND JOURNEYMAN ELECTRICIAN LICENSE EXAM – QUESTIONS AND ANSWERS | VERIFIED ANSWERS and more Exams Electrical and Electronics Engineering in PDF only on Docsity!
MARYLAND JOURNEYMAN ELECTRICIAN LICENSE EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED
PASS | LATEST EXAM UPDATE
The Maryland Journeyperson Electrician License Exam is designed to verify the competency and technical proficiency of individuals seeking professional licensure within the state. This comprehensive assessment evaluates a candidate’s understanding of the National Electrical
Core Domains General Electrical Theory Wiring and Protection Wiring Methods and Materials Equipment for General Use Special Occupancies *Special Equipment and Condition *Communication Systems and Tables *Maryland Safety and State Regulati Introduction
Code (NEC), local amendments, and essential safety protocols. The exam consists of multiple-choice and scenario-based questions that require the application of foundational theory to practical, real-world electrical installations. Candidates are assessed on their ability to perform complex calculations, interpret technical diagrams, and ensure regulatory compliance. Success requires critical thinking and decisive action to maintain public safety and professional standards.
SECTION ONE: QUESTIONS 1–
- What is the maximum number of disconnects permitted for a single service, except as provided in NEC 230.71?
A. Two B. Four 🟢 C. Six D. Eight
🔴 Explanation: Per NEC 230.71, a service shall have no more than six switches or sets of circuit breakers mounted in a single
or be protected by a steel plate.
- A 240-volt single-phase heater is rated at 4,800 watts. What is the current draw?
A. 10 amps 🟢 B. 20 amps C. 30 amps D. 40 amps
🔴 Explanation: Using Ohm's Law ( ), amperes.
- What is the minimum clear working space depth in the direction of live parts for a system operating at 120 volts to ground where there are exposed live parts on one side and grounded parts on the other?
🟢 A. 3 feet B. 4 feet C. 5 feet D. 6 feet
🔴 Explanation: Per NEC Table 110.26(A)(1), for Condition 2 (live parts on one side and grounded parts on the other) at voltages
I = P / V 4800/240 = 20
0-150 to ground, the minimum depth is 3 feet.
- Which conductor is typically identified by a continuous green or green with one or more yellow stripes?
A. Ungrounded conductor B. Grounded (Neutral) conductor 🟢 C. Equipment grounding conductor D. High-leg conductor
🔴 Explanation: NEC 250.119 states that equipment grounding conductors shall be permitted to be bare, covered, or insulated, and if insulated, shall have a continuous outer finish of green.
- What is the maximum distance between supports for a horizontal run of 1-inch Rigid Metal Conduit (RMC)?
A. 5 feet 🟢 B. 10 feet C. 12 feet D. 14 feet
🔴 Explanation: NEC Table 344.30(B)(2) specifies that 1-inch RMC must be supported at least every 10 feet.
🔴 Explanation: NEC Chapter 9, Table 1 specifies that for over two conductors, the maximum fill permitted is 40% of the conduit area.
- Which type of lamp is most likely to contain mercury and require special disposal?
A. Incandescent B. LED 🟢 C. Fluorescent D. Halogen
🔴 Explanation: Fluorescent lamps contain mercury vapor which is hazardous and regulated under environmental disposal standards.
- What is the minimum size copper equipment grounding conductor for a 60-ampere circuit?
🟢 A. 10 AWG B. 8 AWG C. 12 AWG D. 6 AWG
🔴 Explanation: According to NEC Table 250.122, a 60-ampere overcurrent device requires a minimum 10 AWG copper equipment grounding conductor.
- A "bonding jumper" is used to:
A. Ground the neutral to the earth 🟢 B. Ensure electrical continuity between metal parts C. Protect against lightning strikes D. Reduce voltage drop in long runs
🔴 Explanation: NEC Article 100 defines a bonding jumper as a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.
- Boxes used in lighting outlets must be designed to support at least:
A. 25 lbs 🟢 B. 50 lbs C. 75 lbs D. 100 lbs
🔴 Explanation: NEC 314.27(A)(2) states that boxes used at luminaire outlets shall be designed to support a luminaire
🔴 Explanation: NEC 300.14 requires at least 6 inches of free conductor, measured from the point in the box where it emerges from its raceway or cable sheath.
- A circuit breaker that is rated for "100% continuous duty" can be loaded to its full nameplate rating. Standard breakers are generally limited to:
A. 50% 🟢 B. 80% C. 90% D. 125%
🔴 Explanation: NEC 210.20(A) states that for a continuous load, the overcurrent device must be rated at 125% of the load, meaning a standard breaker can only handle 80% of its rating for continuous loads.
- Liquidtight flexible nonmetallic conduit (LFNC) must be securely fastened within how many inches of every outlet box or fitting?
A. 6 inches 🟢 B. 12 inches
C. 18 inches D. 24 inches
🔴 Explanation: NEC 356.30 requires LFNC to be securely fastened at intervals not exceeding 3 feet and within 12 inches of every outlet box, cabinet, or fitting.
- What is the demand factor for the first 3,000 volt-amperes of a general lighting load in a dwelling unit?
🟢 A. 100% B. 50% C. 35% D. 25%
🔴 Explanation: According to NEC Table 220.42, the first 3, VA of a dwelling unit's general lighting load is calculated at 100%.
- Which of the following describes a "Class I" hazardous location?
🟢 A. Areas where flammable gases or vapors may be present B. Areas where combustible dust may be present
- What is the required clear working space width for electrical equipment?
A. 24 inches 🟢 B. 30 inches C. 36 inches D. 48 inches
🔴 Explanation: NEC 110.26(A)(2) requires the width of the working space in front of the electrical equipment to be the width of the equipment or 30 inches, whichever is greater.
- Overcurrent protection for 14 AWG copper conductors is generally limited to:
🟢 A. 15 amperes B. 20 amperes C. 25 amperes D. 30 amperes
🔴 Explanation: NEC 240.4(D)(3) specifies that the overcurrent protection for 14 AWG copper shall not exceed 15 amperes.
- When installing a ground rod, what is the minimum length required to be in contact with the soil?
A. 4 feet B. 6 feet 🟢 C. 8 feet D. 10 feet
🔴 Explanation: NEC 250.52(A)(5) requires rod and pipe electrodes to have at least 8 feet of length in contact with the soil.
- Receptacles installed on 15- and 20-ampere branch circuits must be of what type?
A. Non-grounding type 🟢 B. Grounding type C. Locking type D. Twist-lock type
🔴 Explanation: NEC 406.4(A) requires receptacles installed on 15- and 20-ampere branch circuits to be of the grounding type.
- The "Standard for Electrical Safety in the Workplace" is known as:
A. NEC B. OSHA 10
C. No special protection required D. Surge protection
🔴 Explanation: NEC 210.8(D) requires GFCI protection for outlets that supply dishwashers in dwelling units.
- Which of the following materials is NOT allowed as an equipment grounding conductor?
A. Rigid Metal Conduit (RMC) B. Electrical Metallic Tubing (EMT) 🟢 C. Gas piping D. Copper wire
🔴 Explanation: NEC 250.104 and 250.52 strictly prohibit the use of metal gas piping as an equipment grounding conductor or grounding electrode.
- What is the minimum cover requirement for direct-buried UF cable under a residential driveway?
A. 12 inches 🟢 B. 18 inches C. 24 inches D. 6 inches
🔴 Explanation: NEC Table 300.5 requires a minimum of 18 inches of cover for residential driveways.
- In a dwelling unit, a receptacle must be installed so that no point along the floor line in any wall space is more than how many feet from an outlet?
🟢 A. 6 feet B. 8 feet C. 10 feet D. 12 feet
🔴 Explanation: NEC 210.52(A)(1) requires receptacles to be installed so that no point measured horizontally along the floor line of any wall space is more than 6 feet from a receptacle outlet.
- If a transformer has a primary voltage of 480V and a secondary voltage of 120V, what is the turns ratio?
A. 2: 🟢 B. 4: C. 10: D. 1:
🔴 Explanation: NEC 210.5(C)(1) requires that where different voltage systems are present, each ungrounded conductor of a branch circuit shall be identified by phase and system at all termination, connection, and splice points.
- A multi-wire branch circuit must be provided with a means to:
A. Increase voltage 🟢 B. Simultaneously disconnect all ungrounded conductors C. Separate the neutrals D. Reduce the ground-fault current
🔴 Explanation: NEC 210.4(B) requires each multi-wire branch circuit to be provided with a means that will simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates.
- What is the minimum rating for a service-disconnecting means for a single-family dwelling?
A. 60 amperes 🟢 B. 100 amperes
C. 150 amperes D. 200 amperes
🔴 Explanation: NEC 230.79(C) requires that for a one-family dwelling, the service disconnecting means shall have a rating of not less than 100 amperes, 3-wire.
- Which of the following is an example of a "Special Occupancy" covered in Chapter 5 of the NEC?
A. Office building 🟢 B. Gasoline dispensing station C. Residential kitchen D. Public library
🔴 Explanation: Gasoline dispensing stations fall under Article 514, which is in Chapter 5 (Special Occupancies).
- What is the purpose of a "system bonding jumper"?
🟢 A. To connect the equipment grounding conductor to the grounded conductor at a separately derived system B. To connect the lightning rod to the main service C. To connect the hot wire to the neutral in a short circuit D. To bond the water pipe to the gas pipe
