Last Updated: Aug 01, 2026
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: System Design | 32% | - Electrical design calculations
- Grounding and bonding design
|
| Topic 2: System Commissioning | 17% | - Performance validation and documentation - Functional testing
|
| Topic 3: Installation | 38% | - Labeling, marking and documentation
|
| Topic 4: Operations & Maintenance | 13% | - Safety and maintenance documentation - System performance monitoring and reporting - Troubleshooting and fault diagnosis - Preventive maintenance procedures |
1. A PV system combiner box contains six source circuits, each with an Isc of 8A. The output conductor is 6 AWG THWN-2 copper rated at 90°C. What is the maximum allowable OCPD rating per NEC?
A) 50A
B) 70A
C) 60A
D) 80A
2. An installer is using ½ in lag boits to secure roof-monitoring hardware to rafters through a roof deck. Which of the following should the installer predrill?
A) A pilot hole one-half the length of the bolt
B) A 1/8 in, pilot hole through the roof into the rafter
C) A pilot hole one-fourth the length of the bolt
D) A 5/16 in pilot hole through the roof into the rafter
3. Which of the following should a PV installer do during dc insulation resistance testing?
A) Remove surge suppression equipment from the circuit being tested.
B) Connect the megohmmeters's negative terminal to the dc circuit insulation
C) Close ac and dc disconnects and have the system running for at least 5 minutes before testing.
D) Wait until is raining and all wiring is damp to conduct the test.
4. A PV system is designed with a 48V battery bank and a 5 kW inverter. The load requires 20 kWh/day, and the system must have 2 days of autonomy with a maximum depth of discharge (DoD) of 50%. What is the minimum battery capacity required in Ah?
A) 1000 Ah
B) 1667 Ah
C) 417 Ah
D) 833 Ah
5. A 5 kW PV system has a derate factor of 0.82. The site receives 5.5 PSH daily. What is the expected daily AC energy output?
A) 27.5 kWh
B) 25.0 kWh
C) 20.5 kWh
D) 22.55 kWh
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: D | Question # 5 Answer: D |
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