NABCEP PV ASSOCIATE EXAM WITH VERIFIED ANSWERS 100% PASS
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NABCEP PV ASSOCIATE
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NABCEP PV ASSOCIATE
NABCEP PV ASSOCIATE EXAM WITH VERIFIED ANSWERS 100% PASS
1. 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?
2. What kind of ground faults do
most inverters detect?
3. Current carrying ability of ...
NABCEP PV ASSOCIATE EXAM WITH VERIFIED ANSWERS 100% PASS
1. An off-grid installation has a 1HP 68KWh
pump that is on 10% of the time 1HP = 746W
and a 20W light that is on 100% 746W * 0.1 * 24hours * 30days =
of the time. What is the monthly 53712Wh
energy use? 20W * 24hrs * 30days = 14400Wh
14400 + 53712 = 68112Wh
68kWh
2. What kind of ground faults do DC
most inverters detect? Inverters detect dc ground faults. AC
ground faults are detected on the AC
side of the inverter at the distribution
paned (MSP, load center). Most invert-
ers are not connected to high or medi-
um voltage. Medium voltage is thou-
sands of volts, large utility scale invert-
ers are connected to medium voltage
via a transformer
3. Current carrying ability of a con- Ampacity
ductor (wire) is called
4. According to ohms law and volt- Proportional. Ohms law: V = I*R
age drop, the relationship between More current makes more voltage
voltage drop and current is drop. This is a reason why we need a
larger wire with more current, so the
wire resistance is less with a larger
wire and there will be less voltage drop.
5. An array in a hot and dry place is C) String size too short. When it is hot,
not producing as expected in sum- voltage can be low. Too long of a string
mer time. Which of the following is would be a problem when it is too cold
NOT a likely problem: not too hot.
a) Decreased ac wire size and volt-
age loss
b) String size too short
C) String size too long
D) Soiling
,6. When using a digital multimeter, Inspect the meter. Always inspect first,
what is the first thing you should look before you touch
do?
7. is the worst design error? D) Different tilt or azimuth operation
A) BIPV on a commercial job within a source circuit is bad. Series
B) A fast-growing tree to the north connections should not have different
of an array in Idaho orientations
C) PV at 5-degree tilt at 40 degrees
latitude
D) Different tilt angles in a PV
source circuit
8. MPPT is for MPPT is maximum power point track-
ing and will optimize the energy har-
nessed from PV. Some inverters have
multiple MPPTs. Charge controllers of-
ten, but don't always, have MPPTs
9. Concentrated PV: A) Only works in direct sunlight. usually
A) Only works with direct sunlight works with 2-axis trackers to always
B) Usually has a single axis tracker point at the sun and will not work at all
C) Will get 30% power during in cloudy conditions. Concentrated PV
cloudy conditions =! Concentrating Solar thermal
D) Is using heat to make electricity
10. Fall protection should be used at 6 feet
heights over
11. Parallel PV circuit connections in- Parallel increase current. Series in-
crease crease voltage
12. Optimal tilt for off-grid PV system Latitude + 15 degrees is Optimal tilt to
in the winter maximize winter production. The sun is
lower in the winter, requiring a higher
tilt angle
13. What is the most acceptable rat- NEMA 3R
ing of an enclosure for exposed
, circuit conductors mounted on an
outside wall?
14. Bypass diodes are located in the Bypass diodes are in PV module junc-
A) Combiner box tion box. Diverts current around a
B) Inverter group of cells if one is shaded. Usually
C) Wiring harness 3 diodes/PV module
D) PV Module
15. PV array at higher elevation would Current. Higher elevation, less atmos-
tend to produce more phere, more irradiance, more cur-
rent. High elevation can also be cool-
er meaning more voltage from cold
temps.
16. How much 14% efficient PV fits on D) 3.5kW. 14% efficient =
25 Square Meters 0.14*1000W/M^2 = 140 W/m^2
A) 3000W 140 * 25 = 3500W = 3.5kW
B) 4.5kW
C) 4000W
D) 3.5kW
17. Which is the smallest conductor? 18 AWG
18 AWG, 10 AWG, 0 AWG, 3/0 AWG
18. What is the simplest type of PV Direct coupled is the simplest with just
system PV and a load that only works when the
sun is out
19. Sun path charts differ based on Latitude
20. Series connections increase Voltage. Parallel increases current
21. The longest shadow at 2PM would The winter solstice (12/21)
be on
22. What is the ground mount advan- Ground mount is cooler hat rooftop be-
tage over a rooftop system? cause of better airflow, meaning higher
voltage
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