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NABCEP PV Installation Professional Exam Questions With Complete Solutions
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NABCEP PV Installation Professional Exam Questions With Complete Solutions
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NABCEP PV Installation Professional Exam Questions WithComplete Solutions
5 steps to calculating wire size Correct Answers 1. Calculate
Maximum Circuit Current
2. Calculate the minimum overcurrent protection device
3. Calculate minimum conductor size based on Imax x 1.25
without conditions of use
4. Calculate minimum conductor size based on Imax with
conditions of use
5. Determine if OCPD can protect the conductor under
conditions of use.
About how many workers are electrocuted every week in the
U.S.? Correct Answers 5
Absorption charging Correct Answers A finishing charge that
occurs for a specified period after the regulation voltage is
reached, usually for a few hours. Charging current continues to
decrease throughout the absorption charge.
Air mass Correct Answers The relative pass length of direct
solar radiation through the atmosphere. Air mass affects the
amount and spectral conect of the solar radiation reach the
earth's surface and varies with sun position and altitude.
AM 1.5 defines the spectral irradiance characteristic for testing
and rating the electrical performance of PV cells and modules
and is representative of a solar altitude angle of about 42
degrees. AM 0 is taken outside the earth's atmosphere and
,represents extraterrestrial radiation. When the sun is directly
overhead in the tropics, air mass is equal to one (AM 1).
Array azimuth angle Correct Answers The direction an array
surface faces relative to due South.
Array reconnect voltage (ARV) Correct Answers The voltage
set point at which the array is again reconnected to charge the
battery.
PWM and constant-voltage type controllers do not have a
definable ARV
Array tilt angle Correct Answers The angle between the array
surface and the horizontal plane.
At what current level can cause a rapid, ineffective heartbeat and
can result in death? Correct Answers 75 mA
At what current level can muscles be paralyzed or "freeze"?
Correct Answers 10 mA
At what height is fall protection required? Correct Answers 6 ft
Autonomy Correct Answers The number of days that a fully
charged battery can meet system loads without any recharging.
Basic OSHA Requirements Correct Answers Employers are
required to provide a safe and healthful workplace free of
hazards.
, All employers must display the OSHA poster and report to
OSHA within 8 hours any incident that results in a fatality or
hospitalization of three or more employees.
Battery charge controller Correct Answers Limits the voltage
and or current delivered to a battery from a charging source to
regulate state-of-charge
Battery installations over ____lbs may have to meet certain
engineering requirements in seismic regions for the design of
non-structural electrical components (ASCE 7-10) Correct
Answers 400
BIPV Correct Answers Building-Integrated Photovoltaics
Bonding Correct Answers Electrically connecting metal parts
together so that they stay at the same voltage.
BOS Correct Answers Balance-of-System Components include
all mechanical or electrical components and hardware used to
assemble and intergrate major components in a PV system
together (i.e. all components in a PV system except modules and
inverters)
Bulk charging Correct Answers Occurs when the battery is
below 90% SOC and all available PV current is delivered to the
batteries. Battery voltage increases at the battery charges. Once
the regulation voltage is reached, the charging current is limited
to maintain regulation voltage.
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