最新的 NABCEP Board PVIP 免費考試真題:

1. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.15
B) 1.21
C) 1.12
D) 1.18

2. A PV system was installed in July 2017 under the 2017 NEC. The system has a string inverter located inside a garage on a wall 10 ft, from the outside wall and 1oft, from the ac load center at the point of utility connection. The PV system has a PV array on the roof. Which of the following represents the PV rapid shutdown system requirement for the controlled PV system conductors associated with this PV array?

A) More than 10ft, from the PV array or more than 5 ft. in length inside the building
B) More than 1 ft, from the PV array or more than 3 ft, from the point of entry of the building.
C) More than 1 ft, from the VP array and more than 5 ft. In length the building.
D) Within the array boundary and more than 3.ft from the point of entry of the building.

3. A 1. 100 ft, 2 ranch home with cathedral callings has a 14 ft. x 41 ft. 8 in , south-facing , composite shingle roof. An engineer has determined that the home's 2 in, x 6 in. on-center roof rafters are strong enough to gold a solar electric system. The system will have 62.25 in. x 32.50 in. modules with a 1-in gap between modules and a standard twin-rill mounting system number of modules that can fit on the roof on under these conditions?

A) 28 modules in portrait
B) 40 modules in landscape
C) 30 modules in portrait
D) 35 modules in landscape

4. A 7KW/ 14 KWh multimode system has been installed at a residence, ac-couple with the customer's existing
6.7kwh ac PV system. The system providers uninterrupted power to a protect loads subpanel, which is connected to a refrigerator, Microwave, 1.0 ton are conditioner, three lightning circuit, and the 6.7kwac PV system. One month later, the homeowner moves additional circuits to the protected loads subpanel, substantially increasing the loads. Why would this cause, the backfed interconnection breaker in the main service panel to trip?

A) The load «the protected loads subpanel exceeds the PV system ac rating by 25%.
B) The total load exceeds the system's energy storage capacity of 14kWh.
C) The toad exceeds the capacity of the interconnection breaker.
D) The main service panel is no longer compliant with NCC 705.12.

5. A worker is installing modules on a roof 20 feet above grade. What OSHA fall protection is required?

A) Personal fall arrest system
B) Guardrails only
C) Safety net system
D) Any of the above

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