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NABCEP QUESTIONS AND ANSWERS 100% CORRECT | NEW UPDATE 2025
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NABCEP QUESTIONS AND ANSWERS 100% CORRECT | NEW UPDATE 2025
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NABCEP QUESTIONS AND ANSWERS 100%CORRECT | NEW UPDATE 2025
what kind of ground faults do most inverters detect?
a.hight voltage
b.medium voltage
c.AC
d.DC - ANSWER D. Inverters detect dc ground faults(when positive in contact
with ground wire)in most inverters.
Current carrying ability of a conductor(wire)is called.
a.Ampacity
b. Amps
c. inductance
d. insolation - ANSWER A. Current carrying ability is ampacity
According to ohms law and voltage drop, the relationship between voltage and
current is.
a. Proportional
b.Inversely proportional
c.Directly inverse
d.inversely direct - ANSWER A. Voltage and current are proportional.
More current makes more voltage drop
, An Array in Sacramento California in August is not producing as expected. Which
of the following is NOT a likely problem.
a.Decrease ac wire size and voltage loss
b.string size too short
c.string size too long
d.soiling - ANSWER C.Late summer is hot and can be dry. When it is hot,
voltage can be low.Too long of a string would be a problem when it too cold, not
hot.Pay attention to the world Not in question.
When using a digital multimeter, what is the first thing you should do?
a.Turn the meter on
b.inspect the meter
c.Touch the black lead to the white wire
d.Touch the black lead to the black wire - ANSWER B.Inspect the meter
Which is the worst design error?
a.BIPV on commercial job
b.A fast growing tree to the north of the array in idaho
c.Pv at 5 degree tilt at 40 degrees latitude
d.Different tilt angles in PV source circuit - ANSWER D. different tilt or azimuth
orientation within a source circuit is bad.
MPPT is for
a.Optimizing energy from the utility
b.Getting the most energy from a battery with a MPPT inverter
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