WorksheetsNABCEP Study
Total questions: 98
Worksheet time: 8hrs 10mins
A _______ is a company that produces and/or distributes electricity from its central generation point to a consumer.
Integrator
Utility
Distributor
Provider
Distributed-generation systems can include ______
PV systems
Wind turbines
Engine generators
All of the above
Portable PV systems power mobile loads such as _____
Vehicles
Temporary signs and lights
Handheld devices
All of the above
_______ components are the electrical and structural components, aside from the major components, that are required to complete a PV system.
Completion
Equilibrium
Balance-of-system
None of the above
A _____ is a business that designs, builds, and installs complete PV systems for particular applications by matching components from various manufacturers.
Integrator
Assimilator
Distributer
Utility
______ organizations test products for safety and conformity to standard requirements.
Standards
Product listing
Training
Research
_____ energy is expected to compose an increasingly larger portion of energy production.
Potential
Fossil fuel
Renewable
Internal
A solar ______ is a device designed to absorb solar radiation and convert it to another form, usually heat or electricity.
Mount
Energy collector
Reflector
Chamber
Positioning windows to face ____ allows maximum sunlight and heat into the building.
North
South
East
West
Solar ____ systems are primarily used in residences to heat water and living spaces.
Thermal heating
Concentrating
Architectural
Chemical
The utility's network of conductors, substations, and equipment used to distribute electricity is called...?
Power plant
Grid
Distributed generation
None of the above
What material is used to make photovoltaic cells?
Silicon
Glass
Photo-absorbing film
None of the above
A system in which many smaller power generating systems create electrical power near the point of consumption is called....?
Power plant
Grid
Distributed Generation
None of the above
What is an important advantage of a distributed system?
It can create unlimited amount of power.
Losses from long transmission lines are avoided.
Both of the above
None of the above
What application spurred the development of early photovoltaic cells?
Wireless applications
Space applications
Oil drilling
None of the above
Identify a balance-of-system component.
Switchgear
Inverter
Battery
None of the above
What criteria must a PV installer meet?
Complies with applicable building and electrical codes and standards.
Capable of sizing systems and equipment to meet performance expectations.
Both of the above
None of the above
What article of the NEC addresses the design and installation of PV systems?
690
70E
NEC does not cover PV systems
None of the above
An entity designated by the local government with legal powers to administer, interpret and enforce building codes is...
NEC
OSHA
AHJ
None of the above
____ time is a timescale based on the apparent motion of the sun crossing a local meridian.
Standard
Solar
Meridian
Daylight saving
Solar irradiation is measured in what units?
W
Wh/m^2
W/m^2
None of the above
Solar ____ is the intensity of solar power.
Irradiance
Strength
Insolation
Irradiation
How much power from the Sun is received on Earth?
170 million watts
170 million gigawatts
Both are correct
None of the above
If a planet is at a distance from the Sun equal to four times the distance of Earth from the Sun, it will receive the solar power equal to:
Four times less the solar power received on Earth.
Sixteen times less the solar power received on Earth.
It does not matter how far the planet is, it will receive the same amount as Earth.
None of the above
Extraterrestrial solar radiation is an important benchmark for the design of PV arrays used in:
Earth orbiting satellites
International Space Station
Both of the above
None of the above
The average extraterrestrial solar power (irradiance) at a distance of 1 AU from the sun is called:
the Astronomical Unit
the Solar Unit
the Solar Constant
None of the above
_____ radiation is all of the solar radiation reaching Earth's surface and is the sum of direct and diffuse radiation.
Total global
Universal
Collective
Albedo
Concentrating collectors utilize:
Diffuse radiation only
Direct radiation only
Both diffuse and direct radiation
Albedo radiation
Peak sun is an estimate of peak solar irradiance reaching Earth's surface and has a generally accepted value of ____ W/m^2
170
1000
1366
1500
The amount of solar radiation that is absorbed or scattered in the atmosphere depends on:
The amount of solar wind that affects the position of clouds.
How much atmosphere it passes through before reaching Earth's surface.
Both of the above
None of the above
Air mass depends on:
The amount of solar wind
The altitude and latitude of the location
The temperature of air
None of the above
Solar radiation is ____ by components of the atmosphere, including ozone, carbon dioxide, and water vapor, as well as other gases and particles.
Absorbed
Scattered
Reflected
All of the above
The radiation that reaches Earth after it is scattered from clouds and atmosphere is called:
Direct
Diffuse
Albedo
None of the above
If there is an irradiance of 600 W/m^2 over 5 hours, this equals to how many peak Sun hours?
3
3 kW
3 kWh
None of the above
A ___ is a sensor that measures the total global solar irradiance in a hemispherical field of view.
Pyrheliometer
Solar transmission meter
Drosometer
Pyranometer
A pyrheliometer is used to measure:
Total global radiation
Direct radiation
Diffuse radiation
None of the above
Diffuse solar radiation can be measured with:
Pyrheliometer
Pyranometer
Pyranometer with a shadowing device
None of the above
By how much is the Earth's axis tilted relative to the orbit plane?
Not tilted
23.5*
45*
None of the above
The plane of Earth's orbit around the Sun is called:
Equatorial plane
Ecliptic Plane
Equatorial plane
None of the above
What causes the seasonal variations in Earth's climate?
Earth's tilt
Different thickness of ozone layers
Global warming
None of the above
A ______ is Earth's orbital position when solar declination is at its minimum or maximum.
Equinox
Solstice
Meridian
Eclipse
During ________, the length of the day and the length of the night is equal at every point on the Earth.
Equinoxes
Solstices
Meridians
Eclipses
The solar _____ angle is the vertical angle between the sun and the horizon.
Altitude
Azimuth
Declination
Elevation
Identify the angle 1
Solar altitude angle
Solar azimuth angle
Zenith angle
None of the above
Identify angle 2
Solar altitude angle
Solar azimuth angle
Zenith angle
None of the above
Identify angle 3
Solar altitude angle
Solar azimuth angle
Zenith angle
None of the above
Relative to the summer position of the PV array, should you increase or decrease the tilt angle in the winter to improve the solar energy collection?
Increase
Decrease
Does not matter the tilt angle
None of the above
Location of the PV array should be determined:
During the site survey
By analyzing solar radiation data
Consulting the customer over the phone
None of the above
Per OSHA, fall protection is required:
If the roof is steeper than 45*
If the work is to be preformed at more than six feet above the ground
If there is a possibility of strong wind
None of the above
Building codes affect PV system ____.
planning
design
installation
all of the above
The required area of a solar PV array is based on:
the desired output
the array efficiency
density of modules installed in the array
all of the above
A ____ is a visit to the installation site to assess the site conditions and establish the needs and requirements for the system.
site survey
installation assessment
location study
evaluation
A ____ calculator is used to view the solar window for a particular location for assessing shading.
Insolation
Sun path
Solar lane
Window
____ is the angle between the direction a compass needle points (toward magnetic north) and true geographic north.
Solar declination
Magnetic declination
Azimuth
Altitude
In the worst cases, 10% shading can reduce the output by as much as:
10%
50%
90%
None of the above
The ____ angle is the angle from the horizontal to the top of an obstruction, as viewed from a specific location.
Altitude
Surface
Profile
Tilt
For ground-mounted arrays, the installer should evaluate the ____.
terrain
elevations
soil conditions
all of the above
The type of mounting system and attachment of PV array depends on:
roof type
roof slope
both of the above
none of the above
A ____ is a collection of information about a facility's or customer's energy use.
meter reading
energy audit
peak power rating
none of the above
Accurate _____ ranges for a site are particularly important because this significantly affects the operation and performance of modules, batteries, and inverters.
temperature
precipitation
wind speed
all of the above
The DC power output of an array during low insolation should provide about ____% of the minimum AC power requirement.
75
100
130
160
Energy management includes _____
the use of automatic controls
adjusting setpoints
adopting sensible choices in appliance use
all of the above
If the altitude angle of the sun is less than the profile angle when the sun is at the same azimuth angle as the obstruction, then:
the location will be shaded
the location will not be shaded
the magnetic declination cannot be overcome
none of the above
The detailed electrical load analysis should include:
measured peak power demand of each load
average daily time of use of each load
the total energy consumed by each load
all of the above
Technical proposal for a solar PV system should include:
cost estimates
design completion
logistics details
all of the above
DC power produced by solar PV arrays is used:
to charge batteries
to directly power DC loads
for conversion into AC power using inverters
all of the above
What is the role of battery banks in solar photovoltaic system?
energy storage
to provide short surge currents for loads with special starting requirements
stable system operating voltage
all of the above
Why is a stable system operating voltage important in a solar photovoltaic system?
to provide operation of inverters and other components at their rated voltages
to avoid component damage due to high voltages
both of the above
none of the above
A battery ____ is a group of batteries connected together with series and parallel connections to provide a specific voltage and capacity.
array
bank
cell
none of the above
____ store energy in an electrical field developed by two oppositely charged parallel conductive plates separated by a dielectric (insulating) material.
capacitors
batteries
inductors
chargers
Which of the following is an important characteristic of a capacitor?
fast response time
they release heat during discharge
both of the above
none of the above
Which of the following belongs to the power conditioning equipment in a solar PV system?
inverters
rectifiers
both of the above
none of the above
Which of the following is the most complex electronic device in a solar PV system?
PCU
solar module
battery bank
BoS
A ____ is a device that converts DC power into AC power.
charger
inverter
alternator
rectifier
A ____ is a device that converts DC power from one voltage to another.
DC-AC converter
rectifier
battery
DC-DC converter
The voltage and current output from an array can vary with ____.
temperature
irradiance
load
all of the above
A ____ is a device that converts mechanical energy into electricity by means of electromagnetic induction.
generator
converter
turbine
capacitor
What is the role of a charge controller in a solar photovoltaic system?
protects the battery from overcharge
stores energy
converts DC power into AC power
none of the above
A _____ is a device that converts AC power into DC power.
inverter
rectifier
battery
converter
What device has the ability to adjust its resistance of input voltage based on various temperature and irradiance conditions?
solar PV module
MPPT
battery
converter
In what type of solar PV system does the size of load determine the size and cost of the solar array?
stand-alone
utility interactive
any solar PV system
none of the above
Which of the following is classified as an electrical BoS?
fencing
switchgear
both of the above
none of the above
It converts mechanical into electrical energy:
genset
motor
both of the above
none of the above
A ____ turbine is a device that compresses and burns a fuel-air mixture, which expands and spins a turbine.
engine
gas
wind
power
A ____ switch allows an electrical system to be switched from a primary power source to an alternate power source in order to keep critical loads operating.
uninterruptible
auxiliary
transfer
battery
A ____ cell is an electrochemical device that uses hydrogen and oxygen to produce DC electricity, with water and heat as byproducts.
power
DC
fuel
gas
A PV system that operates in parallel with and is connected to the electric utility grid is called a _____ PV system.
utility-interactive
grid-connected
interactive
all of the above
What type of solar PV configuration does not use any power conditioning equipment?
direct coupled
grid-connected
interactive
none of the above
What type of solar PV configuration consists of a solar array, a battery and a load?
direct coupled
grid-connected
interactive
none of the above
For what condition(s) is a self-regulated standalone solar PV system not suitable?
variable loads
operator controlled loads
both of the above
none of the above
When is a charge control required according to the NEC?
a sensitive DC load is connected to the array
the array current is equal to or more than 3% of the rated battery capacity in Ah
variable temperature conditions
none of the above
Engine generators are characterized by:
output rating
fuel-to-power conversion efficiency
both of the above
none of the above
____ is the process of adding small amounts of impurity elements to semiconductors to alter their electrical properties.
Doping
Crystallizing
Contaminating
Purifying
A ____ is a unit of electromagnetic radiation.
proton
electron
neutron
photon
A ____ is a thin, flat disk or rectangle of base semiconductor material.
ribbon
wafer
chip
PV cell
A ____ curve is the graphic representation of all possible voltage and current operating points for a PV device at a specific operating condition.
PV
I-V
V-I
C-V
The _____ point is the operating point on an I-V curve where the product of I and V is at a maximum.
short-circuit current
open-circuit voltage
maximum power
maximum load
_____ is the ratio of maximum power to the product of the open-circuit voltage and short-circuit current.
Fill factor
Efficiency
Power performance
Productivity
