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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. A PV array with 58 in. X 38 in modules in portrait orientation is to be mounted at a 35 tiit angle on a shingle roof that has a 5:12 pitch. Assuming the support leg is attached to the top of the modules and is perpendicular to its face, what is the length of the support leg for the modules?

A) 24.24 in.
B) 12.73 in.
C) 18.25 in.
D) 40.50 in.

2. A metal condult containing an array circuit with Vmo of 400Vdc is connected to a metal enclosure at the location where the concentric knockouts have been punched by the manufacturer. Which method of attachment should be used?

A) Sealing locknut
B) Grounding bushing
C) Threaded coupling
D) Insulated bushing

3. When installing an ungrounded PV system with an open-circuit voltage of 450Vdc and a maximum voltage of
3000Vdc which procedures should be followed to establish an electrically safe condition?

A) Determine possible sources electrical supply an avoid exposure to energized conductors or parts.
B) Verify that disconnecting device blades are closed and test conductors using an adequately rated detector.
C) Mount inverters on nonconductive supports and temporarily ground one dc circuit conductor.
D) Apply lockout/tagout devices and install a listed isolation transformer.

4. An 8KWsc roof-mounted array is placed on a school building. The inverter is located within 1 ft, of the array boundary and has an integrated ac-and dc-disconnecting switch. The system is to be connected to a 400A load center, protected by a 400A main breaker. Which of the following MUST be included to meet NEC requirements?

A) A rapid shutdown initiationdevice operating contractor within 1 ft, of the array to de-energize the dc subarrays
B) An ac-disconnect label with the location of the rooftop dc-disconnect switch.
C) A readily accessible dc disconnect with rapid shutdown initiation device permanently labeled
D) A readily accessible ac-disconnecting switch, who location is identified on the system directory

5. Which of the following MUST be referenced for determining a site's design wind speed?

A) The NEC version in effect
B) The module manufacture's design wind speed
C) The ASHRAE Handbook_fundamentals in effect
D) The jurisdiction's local building code in effect

Solutions: