OHIO MASTER ELECTRICIAN EXAM – QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
*Core Domains*
*General Electrical Theory and Calculations*
*Branch Circuits and Conductor Sizing*
*Feeders and Service Entrance*
*Grounding and Bonding Requirements*
*Motors, Transformers, and HVAC*
*Special Occupancies and Equipment*
*Overcurrent Protection and Shielding*
*Ohio Administrative Code and Law*
*Introduction*
*This comprehensive assessment is designed to evaluate the adva
*competence and regulatory knowledge required of a Master Electr
*State of Ohio. The exam assesses a candidate’s ability to inter
*National Electrical Code, perform complex load calculations, a
*compliance with safety standards. Consisting of multiple-choi
*scenario-based questions, this exam emphasizes real-world appli
*critical decision-making. Candidates must demonstrate proficie
*foundational theory, applied professional knowledge, and eth
*standards. This document serves as a rigorous preparatory too
*ensure mastery of the skills necessary for licensure.*
SECTION ONE: QUESTIONS 1–100
, 1. When calculating the service load for a commercial building, what
is the demand factor for the first 12,500 VA of a sign or outline
lighting circuit?
A. 100%
B. 125%
C. 80%
D. 75%
🟢 A. 100%
🔴 Explanation: According to the NEC, sign and outline lighting loads
are considered continuous loads and are calculated at 100% of the non-
continuous load or 125% of the total, but the specific demand factor for
the calculation of the service itself remains at 100% unless specified
otherwise for continuous operation.
2. In a residential dwelling, what is the maximum distance a
receptacle can be from any point along the floor line in any wall
space?
A. 4 feet
B. 12 feet
C. 6 feet
D. 10 feet
,🟢 C. 6 feet
🔴 Explanation: NEC 210.52(A)(1) states that receptacles must 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.
3. Which of the following is the minimum size copper grounding
electrode conductor for a 400 kcmil copper service-entrance
conductor?
A. 4 AWG
B. 1/0 AWG
C. 2 AWG
D. 3 AWG
🟢 B. 1/0 AWG
🔴 Explanation: Using NEC Table 250.66, for service-entrance
conductors over 350 kcmil through 600 kcmil copper, the minimum size
grounding electrode conductor is 1/0 AWG copper.
4. A 240-volt, single-phase, 15 HP motor has a full-load current of
how many amperes?
A. 64 Amps
B. 80 Amps
, C. 72 Amps
D. 78 Amps
🟢 D. 78 Amps
🔴 Explanation: Per NEC Table 430.248, a 15 HP single-phase motor
operating at 240 volts has a listed full-load current of 78 Amps.
5. What is the maximum number of #12 THHN conductors allowed
in a 3/4 inch EMT conduit?
A. 12
B. 16
C. 10
D. 22
🟢 B. 16
🔴 Explanation: According to Annex C, Table C.1, the maximum number
of 12 AWG THHN conductors permitted in a 3/4" EMT conduit is 16.
6. Under the Ohio Revised Code, how many years of experience as a
journeyman are typically required to sit for the Master Electrician
exam?
A. 2 years
B. 5 years
VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
*Core Domains*
*General Electrical Theory and Calculations*
*Branch Circuits and Conductor Sizing*
*Feeders and Service Entrance*
*Grounding and Bonding Requirements*
*Motors, Transformers, and HVAC*
*Special Occupancies and Equipment*
*Overcurrent Protection and Shielding*
*Ohio Administrative Code and Law*
*Introduction*
*This comprehensive assessment is designed to evaluate the adva
*competence and regulatory knowledge required of a Master Electr
*State of Ohio. The exam assesses a candidate’s ability to inter
*National Electrical Code, perform complex load calculations, a
*compliance with safety standards. Consisting of multiple-choi
*scenario-based questions, this exam emphasizes real-world appli
*critical decision-making. Candidates must demonstrate proficie
*foundational theory, applied professional knowledge, and eth
*standards. This document serves as a rigorous preparatory too
*ensure mastery of the skills necessary for licensure.*
SECTION ONE: QUESTIONS 1–100
, 1. When calculating the service load for a commercial building, what
is the demand factor for the first 12,500 VA of a sign or outline
lighting circuit?
A. 100%
B. 125%
C. 80%
D. 75%
🟢 A. 100%
🔴 Explanation: According to the NEC, sign and outline lighting loads
are considered continuous loads and are calculated at 100% of the non-
continuous load or 125% of the total, but the specific demand factor for
the calculation of the service itself remains at 100% unless specified
otherwise for continuous operation.
2. In a residential dwelling, what is the maximum distance a
receptacle can be from any point along the floor line in any wall
space?
A. 4 feet
B. 12 feet
C. 6 feet
D. 10 feet
,🟢 C. 6 feet
🔴 Explanation: NEC 210.52(A)(1) states that receptacles must 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.
3. Which of the following is the minimum size copper grounding
electrode conductor for a 400 kcmil copper service-entrance
conductor?
A. 4 AWG
B. 1/0 AWG
C. 2 AWG
D. 3 AWG
🟢 B. 1/0 AWG
🔴 Explanation: Using NEC Table 250.66, for service-entrance
conductors over 350 kcmil through 600 kcmil copper, the minimum size
grounding electrode conductor is 1/0 AWG copper.
4. A 240-volt, single-phase, 15 HP motor has a full-load current of
how many amperes?
A. 64 Amps
B. 80 Amps
, C. 72 Amps
D. 78 Amps
🟢 D. 78 Amps
🔴 Explanation: Per NEC Table 430.248, a 15 HP single-phase motor
operating at 240 volts has a listed full-load current of 78 Amps.
5. What is the maximum number of #12 THHN conductors allowed
in a 3/4 inch EMT conduit?
A. 12
B. 16
C. 10
D. 22
🟢 B. 16
🔴 Explanation: According to Annex C, Table C.1, the maximum number
of 12 AWG THHN conductors permitted in a 3/4" EMT conduit is 16.
6. Under the Ohio Revised Code, how many years of experience as a
journeyman are typically required to sit for the Master Electrician
exam?
A. 2 years
B. 5 years
