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NABCEP PV ASSOCIATE EXAM
QUESTIONS & ANSWERS
Question: An off-grid installation has a 1HP pump that is
on 10% of the time and a 20W light that is on 100% of the time. What is the monthly energy use?
CORRECT ANSWER : 68kWh
Question: What kind of ground faults do most inverters
detect?
CORRECT ANSWER : DC
Question: Current carrying ability of a conductor (wire) is
called
CORRECT ANSWER : Ampacity
Question: According to ohms law and voltage drop, the
relationship between voltage drop and current is
CORRECT ANSWER : Proportional
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Question: An array in a hot and dry place is not producing
as expected in summer time. Which of the following is
NOT a likely problem: a) Decreased ac wire size and
voltage loss b) String size too short C) String size too long D) Soiling
CORRECT ANSWER: C) String size too short
Question: When using a digital multimeter, what is the
first thing you should do?
CORRECT ANSWER : Inspect the meter
Question: is the worst design error? A) BIPV on a
commercial job B) A fast-growing tree to the north of an array in Idaho C) PV at 5-degree tilt at 40 degrees latitude
- Different tilt angles in a PV source circuit
CORRECT ANSWER : D) Different tilt or azimuth
operation within a source circuit is bad
Question: MPPT is for
CORRECT ANSWER : MPPT is maximum power point
tracking and will optimize the energy harnessed from PV
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Question: Concentrated PV: A) Only works with direct sunlight B) Usually has a single axis tracker C) Will get 30% power during cloudy conditions D) Is using heat to make electricity
CORRECT ANSWER : A) Only works in direct sunlight
Question: Fall protection should be used at heights over
CORRECT ANSWER : 6 feet
Question: Parallel PV circuit connections increase
CORRECT ANSWER : Parallel increase current
Question: Optimal tilt for off-grid PV system in the
winter
CORRECT ANSWER : Latitude + 15 degrees is Optimal
tilt to maximize winter production
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Question: What is the most acceptable rating of an
enclosure for exposed circuit conductors mounted on an outside wall?
CORRECT ANSWER : NEMA 3R
Question: Bypass diodes are located in the A) Combiner
box B) Inverter C) Wiring harness D) PV Module
CORRECT ANSWER : Bypass diodes are in PV module
junction box
Question: PV array at higher elevation would tend to
produce more
CORRECT ANSWER : Current
Question: How much 14% efficient PV fits on 25 Square
Meters A dominating) 3000W B) 4.5kW C) 4000W D) 3.5kW