OKLAHOMA JOURNEYMAN ELECTRICIAN EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
*Core Domains*
*General Electrical Theory
*Wiring and Protection*
*Wiring Methods and Materials
*Equipment for General Use
*Special Occupancies*
*Special Equipment*
*Calculations and Tables*
*Oklahoma State Safety Codes
*Introduction*
*The purpose of this examination is to evaluate the
SECTION ONE
1. What is the maximum number of overcurrent
devices allowed in a single lighting and appliance
, branch-circuit panelboard?
A. 30
B. 42
C. 48
D. No limit
🟢 B. 42
🔴 Explanation: Traditionally, the NEC limited lighting and
appliance branch-circuit panelboards to 42 overcurrent
devices; while modern codes have removed this specific
limit for certain panelboards, it remains a foundational
standard for Journeyman testing in many jurisdictions.
2. In a dwelling unit, a receptacle outlet must be
installed in any wall space that is or more in width.
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
,🟢 B. 2 feet
🔴 Explanation: According to NEC 210.52(A)(2)(1), a
receptacle is required for any wall space 2 feet or more in
width to prevent the use of extension cords.
3. Which of the following conductor materials has the
highest electrical conductivity?
A. Aluminum
B. Copper
C. Silver
D. Gold
🟢 C. Silver
🔴 Explanation: Silver is the most conductive element,
followed by copper. While copper is the standard for
wiring due to cost, silver remains the theoretical leader in
conductivity.
4. A 1,500-watt heater is operated on a 120-volt
circuit. What is the approximate current draw?
, A. 10.5 amps
B. 12.5 amps
C. 15.0 amps
D. 18.0 amps
🟢 B. 12.5 amps
🔴 Explanation: Using Ohm’s Law (I = P /V ),
1500/120 = 12.5 amps.
5. What is the minimum burial depth for Rigid Metal
Conduit (RMC) under a residential driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
🟢 C. 18 inches
🔴 Explanation: NEC Table 300.5 specifies that RMC must
be buried at least 18 inches deep when located under a
residential driveway.
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
*Core Domains*
*General Electrical Theory
*Wiring and Protection*
*Wiring Methods and Materials
*Equipment for General Use
*Special Occupancies*
*Special Equipment*
*Calculations and Tables*
*Oklahoma State Safety Codes
*Introduction*
*The purpose of this examination is to evaluate the
SECTION ONE
1. What is the maximum number of overcurrent
devices allowed in a single lighting and appliance
, branch-circuit panelboard?
A. 30
B. 42
C. 48
D. No limit
🟢 B. 42
🔴 Explanation: Traditionally, the NEC limited lighting and
appliance branch-circuit panelboards to 42 overcurrent
devices; while modern codes have removed this specific
limit for certain panelboards, it remains a foundational
standard for Journeyman testing in many jurisdictions.
2. In a dwelling unit, a receptacle outlet must be
installed in any wall space that is or more in width.
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
,🟢 B. 2 feet
🔴 Explanation: According to NEC 210.52(A)(2)(1), a
receptacle is required for any wall space 2 feet or more in
width to prevent the use of extension cords.
3. Which of the following conductor materials has the
highest electrical conductivity?
A. Aluminum
B. Copper
C. Silver
D. Gold
🟢 C. Silver
🔴 Explanation: Silver is the most conductive element,
followed by copper. While copper is the standard for
wiring due to cost, silver remains the theoretical leader in
conductivity.
4. A 1,500-watt heater is operated on a 120-volt
circuit. What is the approximate current draw?
, A. 10.5 amps
B. 12.5 amps
C. 15.0 amps
D. 18.0 amps
🟢 B. 12.5 amps
🔴 Explanation: Using Ohm’s Law (I = P /V ),
1500/120 = 12.5 amps.
5. What is the minimum burial depth for Rigid Metal
Conduit (RMC) under a residential driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
🟢 C. 18 inches
🔴 Explanation: NEC Table 300.5 specifies that RMC must
be buried at least 18 inches deep when located under a
residential driveway.
