NABCEP PV Associate ACTUAL
QUESTIONS AND CORRECT ANSWERS
Voltmeter (and how to use?) - Correct answers✔A device used to measure voltage, or electrical
potential energy difference.
To use: turn the voltmeter to a higher setting than the maximum expected voltage. Touch the
black to negative and the red to positive.
Ohmmeter - Correct answers✔A device used to measure resistance. Multimeters can function as
ohmmeters.
Apparent Power - Correct answers✔In AC transmission, the measure of Volts times Amperes:
Voltamperes (VA).
Current at which body's muscles contract? - Correct answers✔10 Milliamperes (aA)
STC, PTC, NOCT, and CEC - Correct answers✔STC - 1000 w/m^2, 25 degree module temp, 1.5
atmospheres
PTC - 1000 w/m^2, 20 degree ambient temp, 1.5 atmospheres, 1 m/s wind speed (this results in a
module temp of about 50 degrees)
NOCT - 800 w/m^2, 20 degrees ambient, 1 m/s wind speed
CEC - Same as PTC
Voltage Drop (what does length/diameter of cable do to voltage drop?) - Correct answers✔A
decrease in voltage along a conductor through which current is flowing. As the length of the
cable increases, so does its resistance. To decrease voltage drop in a circuit, you can increase the
diameter of the conductors.
, NEC - Correct answers✔National Electric Code. It is a federal regulation, but enforcement is
typically at the local level.
diversion load - Correct answers✔An auxiliary load that is not a critical system load, but is
always available to utilize the full array power in a useful way to protect a battery from
overcharge.
NRTL - Correct answers✔National Recognized Testing Laboratory
Maximum voltage on storage batteries for dwellings? - Correct answers✔Storage batteries for
dwellings shall have the cells connected so as to operate at less than 100 volts.
DSIRE - Correct answers✔Database of state incentives for renewables
IREC - Correct answers✔Interstate REC Standard Foudation
DC to dc converter - Correct answers✔Convert dc current from one voltage to another. An
optimizer is a form of dc to dc converter. They do MPPT on a module level.
Self-commuted inverter - Correct answers✔A commutation where the commutating voltage is
supplied within the inverter. On the other hand, you can have a line commutated inverter where
the line voltage will commute or turn off the inverter. Self-commutated is a stand-alone island
mode and a line commutated inverter is an interactive or anti-islanding inverter output circuit.
lithium ion battery cell nominal voltage - Correct answers✔3.7 volts
QUESTIONS AND CORRECT ANSWERS
Voltmeter (and how to use?) - Correct answers✔A device used to measure voltage, or electrical
potential energy difference.
To use: turn the voltmeter to a higher setting than the maximum expected voltage. Touch the
black to negative and the red to positive.
Ohmmeter - Correct answers✔A device used to measure resistance. Multimeters can function as
ohmmeters.
Apparent Power - Correct answers✔In AC transmission, the measure of Volts times Amperes:
Voltamperes (VA).
Current at which body's muscles contract? - Correct answers✔10 Milliamperes (aA)
STC, PTC, NOCT, and CEC - Correct answers✔STC - 1000 w/m^2, 25 degree module temp, 1.5
atmospheres
PTC - 1000 w/m^2, 20 degree ambient temp, 1.5 atmospheres, 1 m/s wind speed (this results in a
module temp of about 50 degrees)
NOCT - 800 w/m^2, 20 degrees ambient, 1 m/s wind speed
CEC - Same as PTC
Voltage Drop (what does length/diameter of cable do to voltage drop?) - Correct answers✔A
decrease in voltage along a conductor through which current is flowing. As the length of the
cable increases, so does its resistance. To decrease voltage drop in a circuit, you can increase the
diameter of the conductors.
, NEC - Correct answers✔National Electric Code. It is a federal regulation, but enforcement is
typically at the local level.
diversion load - Correct answers✔An auxiliary load that is not a critical system load, but is
always available to utilize the full array power in a useful way to protect a battery from
overcharge.
NRTL - Correct answers✔National Recognized Testing Laboratory
Maximum voltage on storage batteries for dwellings? - Correct answers✔Storage batteries for
dwellings shall have the cells connected so as to operate at less than 100 volts.
DSIRE - Correct answers✔Database of state incentives for renewables
IREC - Correct answers✔Interstate REC Standard Foudation
DC to dc converter - Correct answers✔Convert dc current from one voltage to another. An
optimizer is a form of dc to dc converter. They do MPPT on a module level.
Self-commuted inverter - Correct answers✔A commutation where the commutating voltage is
supplied within the inverter. On the other hand, you can have a line commutated inverter where
the line voltage will commute or turn off the inverter. Self-commutated is a stand-alone island
mode and a line commutated inverter is an interactive or anti-islanding inverter output circuit.
lithium ion battery cell nominal voltage - Correct answers✔3.7 volts
