NABCEP Electrical & Mechanical Concepts

Question 1

What does DC stand for in solar PV systems?

Accepted Answer

Direct Current

Answer

Dynamic Current

Answer

Dual Current

Answer

Distributed Current

Question 2

What converts DC to AC in a solar system?

Accepted Answer

Inverter

Answer

Regulator

Answer

Battery

Answer

Breaker

Question 3

Which wire carries current back to the source?

Accepted Answer

Neutral wire

Answer

Ground wire

Answer

Hot wire

Answer

Live wire

Question 4

What is the purpose of a circuit breaker?

Accepted Answer

Interrupts overcurrent

Answer

Amplifies current

Answer

Stores power

Answer

Measures voltage

Question 5

What is Ohm’s Law?

Accepted Answer

R = V/C

Answer

P = IV

Answer

V = IR

Answer

I = P/R

Question 6

What mechanical load must mounting systems resist?

Accepted Answer

Wind and snow load

Answer

Electric load

Answer

Solar load

Answer

Rainwater

Question 7

Which unit measures electrical resistance?

Accepted Answer

Ohms

Answer

Volts

Answer

Watts

Answer

Amps

Question 8

How are panels connected to increase voltage?

Accepted Answer

Series

Answer

Parallel

Answer

Mixed mode

Answer

Diagonal

Question 9

Which device stores excess energy?

Accepted Answer

Battery

Answer

Inverter

Answer

Diode

Answer

Transformer