NABCEP PV Associate Questions with Correct
Answers
Voltmeter (and how to use?) Correct Answer-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 Answer-A device used to measure resistance.
Multimeters can function as ohmmeters.
Apparent Power Correct Answer-In AC transmission, the measure of
Volts times Amperes: Voltamperes (VA).
Current at which body's muscles contract? Correct Answer-10
Milliamperes (aA)
STC, PTC, NOCT, and CEC Correct Answer-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 Answer-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 Answer-National Electric Code. It is a federal regulation,
but enforcement is typically at the local level.
diversion load Correct Answer-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 Answer-National Recognized Testing Laboratory
Maximum voltage on storage batteries for dwellings? Correct Answer-
Storage batteries for dwellings shall have the cells connected so as to
operate at less than 100 volts.
DSIRE Correct Answer-Database of state incentives for renewables
IREC Correct Answer-Interstate REC Standard Foudation
DC to dc converter Correct Answer-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 Answer-A commutation where the
commutating voltage is supplied within the inverter. On the other hand,
Answers
Voltmeter (and how to use?) Correct Answer-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 Answer-A device used to measure resistance.
Multimeters can function as ohmmeters.
Apparent Power Correct Answer-In AC transmission, the measure of
Volts times Amperes: Voltamperes (VA).
Current at which body's muscles contract? Correct Answer-10
Milliamperes (aA)
STC, PTC, NOCT, and CEC Correct Answer-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 Answer-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 Answer-National Electric Code. It is a federal regulation,
but enforcement is typically at the local level.
diversion load Correct Answer-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 Answer-National Recognized Testing Laboratory
Maximum voltage on storage batteries for dwellings? Correct Answer-
Storage batteries for dwellings shall have the cells connected so as to
operate at less than 100 volts.
DSIRE Correct Answer-Database of state incentives for renewables
IREC Correct Answer-Interstate REC Standard Foudation
DC to dc converter Correct Answer-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 Answer-A commutation where the
commutating voltage is supplied within the inverter. On the other hand,
