Deck 22: Solar Photovoltaic Pv System Installation

Question 1

PV systems are simply energy converters that convert one form of energy (sunlight) into another form of energy (electricity).

Answer 1

True

Question 2

Photovoltaic (PV) systems are solar energy systems that produce electricity directly from sunlight.

Answer 2

True

Question 3

The world PV market is estimated to be more than 75 million dollars by the year 2016.

Answer 3

False

Question 4

A triac is a semiconductor device that allows current to pass through in only one direction.

Question 5

A typical PV solar cell is about 4 inches across and produces about 1 watt of power in full sunlight at about ___________ volts DC.

A) .3
B) .5
C) 1
D) 2

Question 6

The deviation of magnetic south from true south is called magnetic declination.

Question 7

Batteries used in PV systems have wattage ratings that are used to determine how many batteries are needed in a PV system installation.

Question 8

PV modules are connected to a(n) __________ that "converts" the DC electricity produced by most solar arrays to the AC electricity commonly used in a house.

A) array
B) module
C) inverter
D) charge controller

Question 9

__________ are used to chemically store direct current (DC) electrical energy in a PV system.

A) Batteries
B) Modules
C) Panels
D) Racks

Question 10

Stand-alone PV systems typically use array voltages of 12, 24, 48, or 60 volts.

Question 11

A photovoltaic module is a complete, environmentally protected unit consisting of solar cells, optics, and other components, exclusive of tracker, designed to generate dc power when exposed to sunlight.

Question 12

Solar panels are connected together to form a PV ___________.

A) module
B) inverter
C) charge controller
D) array

Question 13

A circuit breaker that is marked "line" and "load" cannot be back-fed.

Question 14

The most common PV module design is a flat-plate module.

Question 15

A ___________ is a configuration of PV cells laminated between a clear outer superstrate (glazing) and an encapsulating inner substrate .

A) solar cell
B) module
C) charge controller
D) inverter

Question 16

A(n) _____________ regulates the battery voltage and makes sure that the PV system batteries (if used) are charged properly.

A) array
B) charge controller
C) inverter
D) module

Question 17

PV systems are not very reliable and systems parts breakdown all of the time.

Question 18

The initial cost of a PV system is expensive and many home owners cannot afford such a system.

Question 19

PV systems have little sound pollution and are very quiet and make no noise when working.

Question 20

The basic photovoltaic device that generates electricity when exposed to light is called a solar flux capacitor.

Question 21

The rate at which an electrical load uses electrical energy or the rate at which electrical energy is produced is called _____________.

A) voltage
B) amperage
C) resistance
D) power

Question 22

Solar ___________ is a measure of solar irradiance over of period of time, typically over the period of a single day.

A) insolation
B) power
C) sunlight
D) current

Question 23

A ____________ system has no connection to the local electric utility's grid system and is used when a home owner wants to be totally independent from the electric utility.

A) stand-alone
B) grid-tied
C) hybrid
D) high voltage

Question 24

1000 watt-hours equal 1 ___________.

A) kVA
B) kWH
C) mA
D) kV

Question 25

The sun's height above the horizon is called ___________ .

A) magnetic declination
B) azimuth
C) altitude
D) length

Question 26

Shading greatly affects a PV array's performance and as a general rule a PV array should be free of shade from ___________.

A) 6:00 am to 9:00 pm
B) 10:00 am to 2:00 pm
C) 9:00 am to 3:00 pm
D) 5:00 am to 5:00 pm

Question 27

The maximum current output of a PV module under conditions of a circuit with no resistance is called the ___________.

A) short circuit current
B) open circuit voltage
C) maximum power point
D) None of the above

Question 28

One amp of current flowing for one hour is equal to one ___________.

A) volt
B) watt
C) ohm
D) amp-hour

Question 29

Article __________ of the National Electrical Code covers solar photovoltaic systems.

A) 550
B) 680
C) 690
D) 820

Question 30

A direct current system with storage batteries is a PV system where loads can be powered ______________.

A) day only
B) night only
C) day or night
D) None of the above

Question 31

Electricity is the flow of ___________ through a circuit.

A) neutrons
B) charges
C) electrons
D) protons

Question 32

The northern hemisphere is tilted towards the sun from ___________ so there is more available solar energy in summer than winter.

A) January through May
B) June through August
C) September through December
D) August through December

Question 33

PV arrays work best when the sun's rays shine ___________ to the cells because of the effect of tilt angle.

A) parallel
B) perpendicular
C) level
D) plumb

Question 34

PV modules should be facing true ___________ for maximum efficiency.

A) East
B) West
C) South
D) North

Question 35

A(n)_____________ system is a system type that incorporates a gas or diesel powered generator along with a PV system.

A) hybrid
B) low voltage
C) high voltage
D) cold storage

Question 36

Voltage sources connected in series result in the total voltage ___________ but the ___________ flow remains the same

A) increasing, current
B) decreasing, current
C) increasing, voltage
D) decreasing, voltage

Question 37

Solar ___________ is a measure of how much solar power is striking a specific location.

A) insolation
B) irradiance
C) power
D) sunlight

Question 38

When storage batteries are used in dwelling units they must be connected so that the maximum operating voltage is _____ volts

A) 15
B) 30
C) 50
D) 100

Question 39

The unit of measure for current is the ___________.

A) volt
B) ohm
C) ampere
D) watt

Question 40

Solar radiation received at the earth's surface varies because of atmospheric ___________.

A) decibels
B) attenuation
C) sones
D) air pockets

Question 41

The time during the day when the sun is at its highest point on earth is called __________.

Question 42

On a clear day, the total solar irradiance striking the earth is about _____ watts per square meter.

Question 43

Because the strength of the sun's rays in space and in the earth's atmosphere does not deviate much it is often referred to as the __________.

Question 44

The amount of solar power moving through space from the sun to the earth is relatively constant and is considered to be approximately _____ watts per square meter.

Question 45

Solar __________ is a measure of the total amount of solar energy accumulated on an area over of period of time.