Deck 22: Alternative Energy System Installation

Question 1

PV modules are connected to an __________ 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

Answer 1

C

Question 2

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.

Answer 2

True

Question 3

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

Answer 3

True

Question 4

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

Question 5

An anemometer is a device used to measure wind speed.

Question 6

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

Question 7

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 8

The world PV market is estimated to be more than 10 million dollars.

Question 9

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

Question 10

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 11

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 12

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

Question 13

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 14

Solar panels are connected together to form a PV ___________.

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

Question 15

Electricity is the flow of ___________ through a circuit.

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

Question 16

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

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

Question 17

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 18

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 19

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

Question 20

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

Question 21

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

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

Question 22

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 23

PV modules should be facing true ___________ for maximum efficiency.

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

Question 24

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

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

Question 25

There are three main components to a wind turbine: the ___________, the alternator, and the tower.

A) rotor
B) fence
C) gear box
D) blades

Question 26

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 27

Using a(n) ___________, mast and a recorder will allow you to get an accurate measurement of wind speeds over a period of time.

A) ammeter
B) anemometer
C) voltage tester
D) ground resistance meter

Question 28

Small wind turbine electric systems consist of one or more wind electric generators with individual systems up to and including __________ kW.

A) 20
B) 50
C) 100
D) 600

Question 29

The unit of measure for current is the ___________.

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

Question 30

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

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

Question 31

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

A) increases, current
B) decreases, current
C) increases, voltage
D) decreases, voltage

Question 32

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 33

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

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

Question 34

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

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

Question 35

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 36

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 37

It is suggested that the tower height used in small wind turbine installation be no less than ___________ feet.

A) 50
B) 80
C) 100
D) 120

Question 38

A wind turbine system includes the wind machine, ___________, and all associated equipment.

A) tower
B) base
C) fence
D) road

Question 39

The ___________ is the enclosure housing the alternator and other parts of a wind turbine.

A) box
B) rotor
C) nacelle
D) compartment

Question 40

1000 watt-hours equal 1 ___________.

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

Question 41

Workers should always use a ___________ and be tied off when climbing or working on a tower.

A) full body harness
B) rope around their waist
C) cable
D) All of the above

Question 42

Article ____________ in the 2011 National Electrical Code covers small wind turbine systems

A) 550
B) 680
C) 690
D) 694

Question 43

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 44

____________ towers are the most common for small wind turbine systems.

A) Tall
B) Short
C) Guyed
D) Self-supporting

Question 45

There are several mechanical hazards to consider during the installation of a small wind turbine system. The ___________ is the most obvious and serious mechanical safety risk.

A) tower
B) main rotor
C) nacelle
D) generator