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NABCEP PV ASSOCIATE EXAM QUESTIONS AND ANSWERS GRADED A+ 2024/2025
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NABCEP PV ASSOCIATE EXAM QUESTIONS AND ANSWERS GRADED A+ 2024/2025
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NABCEP PV ASSOCIATE EXAMAn off-grid installation has a 1HP pump this is on 10% of the time and a 20W light this is on
100% of the time. What is the month-to-month electricity use? - ANS68KWh
1HP = 746W
746W * zero.1 * 24hours * 30days = 53712Wh
20W * 24hrs * 30days = 14400Wh
14400 + 53712 = 68112Wh
68kWh
What form of floor faults do maximum inverters detect? - ANSDC
Inverters discover dc floor faults. AC floor faults are detected at the AC facet of the inverter
on the distribution paned (MSP, load middle). Most inverters aren't related to high or medium
voltage. Medium voltage is heaps of volts, massive application scale inverters are related to
medium voltage thru a transformer
Current carrying potential of a conductor (twine) is referred to as - ANSAmpacity
According to ohms regulation and voltage drop, the relationship among voltage drop and
current is - ANSProportional. Ohms regulation: V = I*R
More cutting-edge makes greater voltage drop. This is a reason why we need a bigger cord
with more current, so the twine resistance is much less with a bigger twine and there may be
less voltage drop.
An array in a hot and dry location is not producing as expected in summer season. Which of
the following is NOT a possible hassle:
a) Decreased ac twine size and voltage loss
b) String size too brief
C) String length too long
D) Soiling - ANSC) String size too brief. When it is warm, voltage can be low. Too long of a
string would be a hassle when it's miles too cold no longer too warm.
When the use of a virtual multimeter, what's the first aspect you ought to do? - ANSInspect
the meter. Always look at first, look before you touch
is the worst layout blunders?
A) BIPV on a commercial task
B) A speedy-developing tree to the north of an array in Idaho
C) PV at five-diploma tilt at 40 ranges latitude
D) Different tilt angles in a PV source circuit - ANSD) Different tilt or azimuth operation within
a source circuit is horrific. Series connections must not have unique orientations
MPPT is for - ANSMPPT is maximum strength point monitoring and could optimize the
electricity harnessed from PV. Some inverters have multiple MPPTs. Charge controllers
regularly, however do not continually, have MPPTs
, Concentrated PV:
A) Only works with direct sunlight
B) Usually has a single axis tracker
C) Will get 30% energy at some stage in cloudy situations
D) Is the usage of warmth to make strength - ANSA) Only works in direct sunlight. Generally
works with 2-axis trackers to always point on the sun and will now not paintings in any
respect in cloudy conditions. Concentrated PV =! Concentrating Solar thermal
Fall protection must be used at heights over - ANS6 feet
Parallel PV circuit connections boom - ANSParallel boom modern. Series increase voltage
Optimal tilt for off-grid PV machine within the winter - ANSLatitude + 15 ranges is Optimal tilt
to maximize iciness production. The solar is lower within the iciness, requiring a better tilt
angle
What is the maximum ideal rating of an enclosure for exposed circuit conductors mounted on
an outside wall? - ANSNEMA 3R
Bypass diodes are placed in the
A) Combiner box
B) Inverter
C) Wiring harness
D) PV Module - ANSBypass diodes are in PV module junction box. Diverts modern-day
around a group of cells if one is shaded. Usually 3 diodes/PV module
PV array at higher elevation might have a tendency to produce extra - ANSCurrent. Higher
elevation, less environment, greater irradiance, greater modern. High elevation can also be
cooler which means greater voltage from cold temps.
How much 14% efficient PV fits on 25 Square Meters
A) 3000W
B) 4.5kW
C) 4000W
D) 3.5kW - ANSD) 3.5kW. 14% green = zero.14*1000W/M^2 = 140 W/m^2
a hundred and forty * 25 = 3500W = three.5kW
Which is the smallest conductor? - ANS18 AWG
18 AWG, 10 AWG, zero AWG, 3/0 AWG
What is the most effective form of PV system - ANSDirect coupled is the best with simply PV
and a load that only works whilst the solar is out
Sun course charts range based totally on - ANSLatitude
Series connections boom - ANSVoltage. Parallel increases cutting-edge
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