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NABCEP Study

Total questions: 98

Worksheet time: 8hrs 10mins

Name
Class
Date
1.

A _______ is a company that produces and/or distributes electricity from its central generation point to a consumer.

a)

Integrator

b)

Utility

c)

Distributor

d)

Provider

2.

Distributed-generation systems can include ______

a)

PV systems

b)

Wind turbines

c)

Engine generators

d)

All of the above

3.

Portable PV systems power mobile loads such as _____

a)

Vehicles

b)

Temporary signs and lights

c)

Handheld devices

d)

All of the above

4.

_______ components are the electrical and structural components, aside from the major components, that are required to complete a PV system.

a)

Completion

b)

Equilibrium

c)

Balance-of-system

d)

None of the above

5.

A _____ is a business that designs, builds, and installs complete PV systems for particular applications by matching components from various manufacturers.

a)

Integrator

b)

Assimilator

c)

Distributer

d)

Utility

6.

______ organizations test products for safety and conformity to standard requirements.

a)

Standards

b)

Product listing

c)

Training

d)

Research

7.

_____ energy is expected to compose an increasingly larger portion of energy production.

a)

Potential

b)

Fossil fuel

c)

Renewable

d)

Internal

8.

A solar ______ is a device designed to absorb solar radiation and convert it to another form, usually heat or electricity.

a)

Mount

b)

Energy collector

c)

Reflector

d)

Chamber

9.

Positioning windows to face ____ allows maximum sunlight and heat into the building.

a)

North

b)

South

c)

East

d)

West

10.

Solar ____ systems are primarily used in residences to heat water and living spaces.

a)

Thermal heating

b)

Concentrating

c)

Architectural

d)

Chemical

11.

The utility's network of conductors, substations, and equipment used to distribute electricity is called...?

a)

Power plant

b)

Grid

c)

Distributed generation

d)

None of the above

12.

What material is used to make photovoltaic cells?

a)

Silicon

b)

Glass

c)

Photo-absorbing film

d)

None of the above

13.

A system in which many smaller power generating systems create electrical power near the point of consumption is called....?

a)

Power plant

b)

Grid

c)

Distributed Generation

d)

None of the above

14.

What is an important advantage of a distributed system?

a)

It can create unlimited amount of power.

b)

Losses from long transmission lines are avoided.

c)

Both of the above

d)

None of the above

15.

What application spurred the development of early photovoltaic cells?

a)

Wireless applications

b)

Space applications

c)

Oil drilling

d)

None of the above

16.

Identify a balance-of-system component.

a)

Switchgear

b)

Inverter

c)

Battery

d)

None of the above

17.

What criteria must a PV installer meet?

a)

Complies with applicable building and electrical codes and standards.

b)

Capable of sizing systems and equipment to meet performance expectations.

c)

Both of the above

d)

None of the above

18.

What article of the NEC addresses the design and installation of PV systems?

a)

690

b)

70E

c)

NEC does not cover PV systems

d)

None of the above

19.

An entity designated by the local government with legal powers to administer, interpret and enforce building codes is...

a)

NEC

b)

OSHA

c)

AHJ

d)

None of the above

20.

____ time is a timescale based on the apparent motion of the sun crossing a local meridian.

a)

Standard

b)

Solar

c)

Meridian

d)

Daylight saving

21.

Solar irradiation is measured in what units?

a)

W

b)

Wh/m^2

c)

W/m^2

d)

None of the above

22.

Solar ____ is the intensity of solar power.

a)

Irradiance

b)

Strength

c)

Insolation

d)

Irradiation

23.

How much power from the Sun is received on Earth?

a)

170 million watts

b)

170 million gigawatts

c)

Both are correct

d)

None of the above

24.

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:

a)

Four times less the solar power received on Earth.

b)

Sixteen times less the solar power received on Earth.

c)

It does not matter how far the planet is, it will receive the same amount as Earth.

d)

None of the above

25.

Extraterrestrial solar radiation is an important benchmark for the design of PV arrays used in:

a)

Earth orbiting satellites

b)

International Space Station

c)

Both of the above

d)

None of the above

26.

The average extraterrestrial solar power (irradiance) at a distance of 1 AU from the sun is called:

a)

the Astronomical Unit

b)

the Solar Unit

c)

the Solar Constant

d)

None of the above

27.

_____ radiation is all of the solar radiation reaching Earth's surface and is the sum of direct and diffuse radiation.

a)

Total global

b)

Universal

c)

Collective

d)

Albedo

28.

Concentrating collectors utilize:

a)

Diffuse radiation only

b)

Direct radiation only

c)

Both diffuse and direct radiation

d)

Albedo radiation

29.

Peak sun is an estimate of peak solar irradiance reaching Earth's surface and has a generally accepted value of ____ W/m^2

a)

170

b)

1000

c)

1366

d)

1500

30.

The amount of solar radiation that is absorbed or scattered in the atmosphere depends on:

a)

The amount of solar wind that affects the position of clouds.

b)

How much atmosphere it passes through before reaching Earth's surface.

c)

Both of the above

d)

None of the above

31.

Air mass depends on:

a)

The amount of solar wind

b)

The altitude and latitude of the location

c)

The temperature of air

d)

None of the above

32.

Solar radiation is ____ by components of the atmosphere, including ozone, carbon dioxide, and water vapor, as well as other gases and particles.

a)

Absorbed

b)

Scattered

c)

Reflected

d)

All of the above

33.

The radiation that reaches Earth after it is scattered from clouds and atmosphere is called:

a)

Direct

b)

Diffuse

c)

Albedo

d)

None of the above

34.

If there is an irradiance of 600 W/m^2 over 5 hours, this equals to how many peak Sun hours?

a)

3

b)

3 kW

c)

3 kWh

d)

None of the above

35.

A ___ is a sensor that measures the total global solar irradiance in a hemispherical field of view.

a)

Pyrheliometer

b)

Solar transmission meter

c)

Drosometer

d)

Pyranometer

36.

A pyrheliometer is used to measure:

a)

Total global radiation

b)

Direct radiation

c)

Diffuse radiation

d)

None of the above

37.

Diffuse solar radiation can be measured with:

a)

Pyrheliometer

b)

Pyranometer

c)

Pyranometer with a shadowing device

d)

None of the above

38.

By how much is the Earth's axis tilted relative to the orbit plane?

a)

Not tilted

b)

23.5*

c)

45*

d)

None of the above

39.

The plane of Earth's orbit around the Sun is called:

a)

Equatorial plane

b)

Ecliptic Plane

c)

Equatorial plane

d)

None of the above

40.

What causes the seasonal variations in Earth's climate?

a)

Earth's tilt

b)

Different thickness of ozone layers

c)

Global warming

d)

None of the above

41.

A ______ is Earth's orbital position when solar declination is at its minimum or maximum.

a)

Equinox

b)

Solstice

c)

Meridian

d)

Eclipse

42.

During ________, the length of the day and the length of the night is equal at every point on the Earth.

a)

Equinoxes

b)

Solstices

c)

Meridians

d)

Eclipses

43.

The solar _____ angle is the vertical angle between the sun and the horizon.

a)

Altitude

b)

Azimuth

c)

Declination

d)

Elevation

44.

Identify the angle 1

a)

Solar altitude angle

b)

Solar azimuth angle

c)

Zenith angle

d)

None of the above

45.

Identify angle 2

a)

Solar altitude angle

b)

Solar azimuth angle

c)

Zenith angle

d)

None of the above

46.

Identify angle 3

a)

Solar altitude angle

b)

Solar azimuth angle

c)

Zenith angle

d)

None of the above

47.

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?

a)

Increase

b)

Decrease

c)

Does not matter the tilt angle

d)

None of the above

48.

Location of the PV array should be determined:

a)

During the site survey

b)

By analyzing solar radiation data

c)

Consulting the customer over the phone

d)

None of the above

49.

Per OSHA, fall protection is required:

a)

If the roof is steeper than 45*

b)

If the work is to be preformed at more than six feet above the ground

c)

If there is a possibility of strong wind

d)

None of the above

50.

Building codes affect PV system ____.

a)

planning

b)

design

c)

installation

d)

all of the above

51.

The required area of a solar PV array is based on:

a)

the desired output

b)

the array efficiency

c)

density of modules installed in the array

d)

all of the above

52.

A ____ is a visit to the installation site to assess the site conditions and establish the needs and requirements for the system.

a)

site survey

b)

installation assessment

c)

location study

d)

evaluation

53.

A ____ calculator is used to view the solar window for a particular location for assessing shading.

a)

Insolation

b)

Sun path

c)

Solar lane

d)

Window

54.

____ is the angle between the direction a compass needle points (toward magnetic north) and true geographic north.

a)

Solar declination

b)

Magnetic declination

c)

Azimuth

d)

Altitude

55.

In the worst cases, 10% shading can reduce the output by as much as:

a)

10%

b)

50%

c)

90%

d)

None of the above

56.

The ____ angle is the angle from the horizontal to the top of an obstruction, as viewed from a specific location.

a)

Altitude

b)

Surface

c)

Profile

d)

Tilt

57.

For ground-mounted arrays, the installer should evaluate the ____.

a)

terrain

b)

elevations

c)

soil conditions

d)

all of the above

58.

The type of mounting system and attachment of PV array depends on:

a)

roof type

b)

roof slope

c)

both of the above

d)

none of the above

59.

A ____ is a collection of information about a facility's or customer's energy use.

a)

meter reading

b)

energy audit

c)

peak power rating

d)

none of the above

60.

Accurate _____ ranges for a site are particularly important because this significantly affects the operation and performance of modules, batteries, and inverters.

a)

temperature

b)

precipitation

c)

wind speed

d)

all of the above

61.

The DC power output of an array during low insolation should provide about ____% of the minimum AC power requirement.

a)

75

b)

100

c)

130

d)

160

62.

Energy management includes _____

a)

the use of automatic controls

b)

adjusting setpoints

c)

adopting sensible choices in appliance use

d)

all of the above

63.

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:

a)

the location will be shaded

b)

the location will not be shaded

c)

the magnetic declination cannot be overcome

d)

none of the above

64.

The detailed electrical load analysis should include:

a)

measured peak power demand of each load

b)

average daily time of use of each load

c)

the total energy consumed by each load

d)

all of the above

65.

Technical proposal for a solar PV system should include:

a)

cost estimates

b)

design completion

c)

logistics details

d)

all of the above

66.

DC power produced by solar PV arrays is used:

a)

to charge batteries

b)

to directly power DC loads

c)

for conversion into AC power using inverters

d)

all of the above

67.

What is the role of battery banks in solar photovoltaic system?

a)

energy storage

b)

to provide short surge currents for loads with special starting requirements

c)

stable system operating voltage

d)

all of the above

68.

Why is a stable system operating voltage important in a solar photovoltaic system?

a)

to provide operation of inverters and other components at their rated voltages

b)

to avoid component damage due to high voltages

c)

both of the above

d)

none of the above

69.

A battery ____ is a group of batteries connected together with series and parallel connections to provide a specific voltage and capacity.

a)

array

b)

bank

c)

cell

d)

none of the above

70.

____ store energy in an electrical field developed by two oppositely charged parallel conductive plates separated by a dielectric (insulating) material.

a)

capacitors

b)

batteries

c)

inductors

d)

chargers

71.

Which of the following is an important characteristic of a capacitor?

a)

fast response time

b)

they release heat during discharge

c)

both of the above

d)

none of the above

72.

Which of the following belongs to the power conditioning equipment in a solar PV system?

a)

inverters

b)

rectifiers

c)

both of the above

d)

none of the above

73.

Which of the following is the most complex electronic device in a solar PV system?

a)

PCU

b)

solar module

c)

battery bank

d)

BoS

74.

A ____ is a device that converts DC power into AC power.

a)

charger

b)

inverter

c)

alternator

d)

rectifier

75.

A ____ is a device that converts DC power from one voltage to another.

a)

DC-AC converter

b)

rectifier

c)

battery

d)

DC-DC converter

76.

The voltage and current output from an array can vary with ____.

a)

temperature

b)

irradiance

c)

load

d)

all of the above

77.

A ____ is a device that converts mechanical energy into electricity by means of electromagnetic induction.

a)

generator

b)

converter

c)

turbine

d)

capacitor

78.

What is the role of a charge controller in a solar photovoltaic system?

a)

protects the battery from overcharge

b)

stores energy

c)

converts DC power into AC power

d)

none of the above

79.

A _____ is a device that converts AC power into DC power.

a)

inverter

b)

rectifier

c)

battery

d)

converter

80.

What device has the ability to adjust its resistance of input voltage based on various temperature and irradiance conditions?

a)

solar PV module

b)

MPPT

c)

battery

d)

converter

81.

In what type of solar PV system does the size of load determine the size and cost of the solar array?

a)

stand-alone

b)

utility interactive

c)

any solar PV system

d)

none of the above

82.

Which of the following is classified as an electrical BoS?

a)

fencing

b)

switchgear

c)

both of the above

d)

none of the above

83.

It converts mechanical into electrical energy:

a)

genset

b)

motor

c)

both of the above

d)

none of the above

84.

A ____ turbine is a device that compresses and burns a fuel-air mixture, which expands and spins a turbine.

a)

engine

b)

gas

c)

wind

d)

power

85.

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.

a)

uninterruptible

b)

auxiliary

c)

transfer

d)

battery

86.

A ____ cell is an electrochemical device that uses hydrogen and oxygen to produce DC electricity, with water and heat as byproducts.

a)

power

b)

DC

c)

fuel

d)

gas

87.

A PV system that operates in parallel with and is connected to the electric utility grid is called a _____ PV system.

a)

utility-interactive

b)

grid-connected

c)

interactive

d)

all of the above

88.

What type of solar PV configuration does not use any power conditioning equipment?

a)

direct coupled

b)

grid-connected

c)

interactive

d)

none of the above

89.

What type of solar PV configuration consists of a solar array, a battery and a load?

a)

direct coupled

b)

grid-connected

c)

interactive

d)

none of the above

90.

For what condition(s) is a self-regulated standalone solar PV system not suitable?

a)

variable loads

b)

operator controlled loads

c)

both of the above

d)

none of the above

91.

When is a charge control required according to the NEC?

a)

a sensitive DC load is connected to the array

b)

the array current is equal to or more than 3% of the rated battery capacity in Ah

c)

variable temperature conditions

d)

none of the above

92.

Engine generators are characterized by:

a)

output rating

b)

fuel-to-power conversion efficiency

c)

both of the above

d)

none of the above

93.

____ is the process of adding small amounts of impurity elements to semiconductors to alter their electrical properties.

a)

Doping

b)

Crystallizing

c)

Contaminating

d)

Purifying

94.

A ____ is a unit of electromagnetic radiation.

a)

proton

b)

electron

c)

neutron

d)

photon

95.

A ____ is a thin, flat disk or rectangle of base semiconductor material.

a)

ribbon

b)

wafer

c)

chip

d)

PV cell

96.

A ____ curve is the graphic representation of all possible voltage and current operating points for a PV device at a specific operating condition.

a)

PV

b)

I-V

c)

V-I

d)

C-V

97.

The _____ point is the operating point on an I-V curve where the product of I and V is at a maximum.

a)

short-circuit current

b)

open-circuit voltage

c)

maximum power

d)

maximum load

98.

_____ is the ratio of maximum power to the product of the open-circuit voltage and short-circuit current.

a)

Fill factor

b)

Efficiency

c)

Power performance

d)

Productivity