Advanced Journeyman Skills
Certification Exam (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 85
Time Allowed: 3 hours
Passing Score: 75%
Domains: Electrical (25), HVAC (20), Plumbing (20), General/Integrated Systems
(20)
Domain 1: Advanced Electrical Systems (Questions 1–25)
1. A three-phase, 480V motor draws 34A at 0.85 PF. What is the real power (kW)?
a) 18.2 kW
b) 24.0 kW
c) 24.8 kW
d) 28.3 kW
Rationale: P=3×V×I×PF=1.732×480×34×0.85=24,800 W=24.8 kWP=3
×V×I×PF=1.732×480×34×0.85=24,800W=24.8kW.
2. What is the minimum bending radius for a 500 kcmil copper THHN conductor?
a) 4 inches
b) 9 inches
c) 12 inches
d) 18 inches
Rationale: NEC 2023/2026: For conductors larger than 750 kcmil, radius ≥ 6×
diameter; 500 kcmil ~1.5" diameter → 9".
, 3. Which smart relay protocol is most common for IIoT energy monitoring?
a) Zigbee
b) Modbus TCP/IP
c) Z-Wave
d) Bluetooth Mesh
Rationale: Modbus TCP/IP dominates industrial energy management for reliability
and data granularity.
4. Arc flash boundary is determined by:
a) Conductor size only
b) Available fault current and clearing time
c) Ambient temperature
d) Voltage drop
Rationale: NFPA 70E uses incident energy analysis based on fault current and
OCPD clearing time.
5. A VFD shows "DC bus overvoltage" fault. Likely cause?
a) Short in motor windings
b) Regenerative energy from decelerating load
c) Low input voltage
d) Open circuit in brake resistor (if present)
Rationale: Deceleration sends energy back, raising DC bus voltage. Brake resistor
failure or missing braking unit.
6. In a 2026 smart panel, which technology enables dynamic load balancing?
a) Solid-state circuit breakers with AI
b) Thermal-magnetic breakers
c) Fuses
d) GFCI receptacles
Rationale: Solid-state breakers (e.g., Atom Power, Schneider) use software to
prioritize loads.
7. Ground ring electrode resistance must not exceed:
a) 1 ohm
b) 25 ohms
Certification Exam (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 85
Time Allowed: 3 hours
Passing Score: 75%
Domains: Electrical (25), HVAC (20), Plumbing (20), General/Integrated Systems
(20)
Domain 1: Advanced Electrical Systems (Questions 1–25)
1. A three-phase, 480V motor draws 34A at 0.85 PF. What is the real power (kW)?
a) 18.2 kW
b) 24.0 kW
c) 24.8 kW
d) 28.3 kW
Rationale: P=3×V×I×PF=1.732×480×34×0.85=24,800 W=24.8 kWP=3
×V×I×PF=1.732×480×34×0.85=24,800W=24.8kW.
2. What is the minimum bending radius for a 500 kcmil copper THHN conductor?
a) 4 inches
b) 9 inches
c) 12 inches
d) 18 inches
Rationale: NEC 2023/2026: For conductors larger than 750 kcmil, radius ≥ 6×
diameter; 500 kcmil ~1.5" diameter → 9".
, 3. Which smart relay protocol is most common for IIoT energy monitoring?
a) Zigbee
b) Modbus TCP/IP
c) Z-Wave
d) Bluetooth Mesh
Rationale: Modbus TCP/IP dominates industrial energy management for reliability
and data granularity.
4. Arc flash boundary is determined by:
a) Conductor size only
b) Available fault current and clearing time
c) Ambient temperature
d) Voltage drop
Rationale: NFPA 70E uses incident energy analysis based on fault current and
OCPD clearing time.
5. A VFD shows "DC bus overvoltage" fault. Likely cause?
a) Short in motor windings
b) Regenerative energy from decelerating load
c) Low input voltage
d) Open circuit in brake resistor (if present)
Rationale: Deceleration sends energy back, raising DC bus voltage. Brake resistor
failure or missing braking unit.
6. In a 2026 smart panel, which technology enables dynamic load balancing?
a) Solid-state circuit breakers with AI
b) Thermal-magnetic breakers
c) Fuses
d) GFCI receptacles
Rationale: Solid-state breakers (e.g., Atom Power, Schneider) use software to
prioritize loads.
7. Ground ring electrode resistance must not exceed:
a) 1 ohm
b) 25 ohms
