NABCEP TEST PREP Questions with Correct
Answers
What is the most common PV system configuration in North America?
Correct Answer-Net-metered grid-direct system
What happens to a grid direct system when the power goes down?
Correct Answer-The inverter is designed/required per UL and IEEE
standards to shut off instantly. No grid power, no solar power.
What terminals are connected in a series connection/PV source circuit?
Correct Answer-Positive to Negative
In a series string what happens to the current and voltage? Correct
Answer-Current remains the same, and voltage is additive
According to the NEC, what is the official name of a series string?
Correct Answer-PV Source Circuit
After making a series string, what is done with the remaining terminals?
Correct Answer-The positive on one module, and the negative on the
other become the "homerruns" or leads
What tool do you use to ensure your series connections are wired
properly? Correct Answer-Digital Multimeter
, How can you tell if all panels are working in a series string? Correct
Answer-The voltage should equal the open circuit voltage of all panels
added together.
How does the power compare when if you were to wire the same two
panels in series then in parallel? Correct Answer-They would be the
same
How do you wire modules in parallel? Correct Answer-The like
terminals are connected together... + to + and - to -
When modules are wired in parallel, what happens to the voltage?
Correct Answer-It remains the same
When multiple modules are wired in parallel at the combiner box, what
is the output wiring considered? Correct Answer-PV Output Circuit
What connection between modules causes the current to become
additive? Correct Answer-Parallel Connections
What are the five main values plotted on an I-V Curve? Correct
Answer--Isc: Short Circuit Current
-Imp: Maximum Power Current
-Mpp: Maximum Power Point
-Vmp: Maximum Power Voltage
-Voc: Open Circuit Voltage
Answers
What is the most common PV system configuration in North America?
Correct Answer-Net-metered grid-direct system
What happens to a grid direct system when the power goes down?
Correct Answer-The inverter is designed/required per UL and IEEE
standards to shut off instantly. No grid power, no solar power.
What terminals are connected in a series connection/PV source circuit?
Correct Answer-Positive to Negative
In a series string what happens to the current and voltage? Correct
Answer-Current remains the same, and voltage is additive
According to the NEC, what is the official name of a series string?
Correct Answer-PV Source Circuit
After making a series string, what is done with the remaining terminals?
Correct Answer-The positive on one module, and the negative on the
other become the "homerruns" or leads
What tool do you use to ensure your series connections are wired
properly? Correct Answer-Digital Multimeter
, How can you tell if all panels are working in a series string? Correct
Answer-The voltage should equal the open circuit voltage of all panels
added together.
How does the power compare when if you were to wire the same two
panels in series then in parallel? Correct Answer-They would be the
same
How do you wire modules in parallel? Correct Answer-The like
terminals are connected together... + to + and - to -
When modules are wired in parallel, what happens to the voltage?
Correct Answer-It remains the same
When multiple modules are wired in parallel at the combiner box, what
is the output wiring considered? Correct Answer-PV Output Circuit
What connection between modules causes the current to become
additive? Correct Answer-Parallel Connections
What are the five main values plotted on an I-V Curve? Correct
Answer--Isc: Short Circuit Current
-Imp: Maximum Power Current
-Mpp: Maximum Power Point
-Vmp: Maximum Power Voltage
-Voc: Open Circuit Voltage
