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Electrical Practice Exam

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construction Test sobre Electrical Practice Exam, creado por Tyler Warford el 01/11/2023.
Tyler Warford
Test por Tyler Warford, actualizado hace 7 meses
Tyler Warford
Creado por Tyler Warford hace 7 meses
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Resumen del Recurso

Pregunta 1

Pregunta
A worker needs to repair the HVAC in Francis Hall. He goes into the first floor mechanical room to shut off the power to the Air Handler. What will he place on the switch inside of the breaker box after he shuts power off to the system?
Respuesta
  • LOTO
  • Arc Flash
  • NEC
  • XFMR

Pregunta 2

Pregunta
LOTO can be placed on both Disconnects and Switches inside of Control Panels?
Respuesta
  • True
  • False

Pregunta 3

Pregunta
How many volts are in OH1 coming to a building?
Respuesta
  • 12,000
  • 600
  • 240
  • 408

Pregunta 4

Pregunta
Which unit is a Transformer altering?
Respuesta
  • Volts
  • VA
  • Amps
  • Watts

Pregunta 5

Pregunta
What does a transformer do?
Respuesta
  • Steps-up/steps-down voltage
  • Only steps-up voltage
  • Only steps-down voltage
  • Steps-up/Steps-down amperage

Pregunta 6

Pregunta
_____ come off of the transformer and go to the building.
Respuesta
  • OH1
  • OH2
  • Meter
  • Weather Head

Pregunta 7

Pregunta
what is the purpose of a Weather Head?
Respuesta
  • protects electrical wire from rainwater
  • the point of the conduit where wire sticks out
  • allows electrician to get head in bad weather
  • allows wire to bend

Pregunta 8

Pregunta
what is the purpose of a guy wire?
Respuesta
  • purely structural, no power going to them.
  • it is a ground wire for the overhead powerlines.
  • it feeds to the underground transformer.
  • it does not do anything.

Pregunta 9

Pregunta
what is the difference between OH 1-phase and OH 3-phase?
Respuesta
  • Nothing, they are the same.
  • OH 1-phase has 1 transformer and a OH 3-phase has 3 transformers
  • OH 1-phase has 3 transformer and a OH 3-phase has 1 transformers
  • OH 3-phase can only be mounted on concrete poles while OH 1-phase can only be placed on a wooden pole.

Pregunta 10

Pregunta
an OH power line needs to reach a pad mounted transformer underground, however a large light pole is in the way of travel. what electrical device will be installed to fix this issue?
Respuesta
  • a pull box - able to pull the line from the OH line, then can send wire to the pad mounted transformer.
  • another transformer - able to pull the line from the OH line, then cam send the wire to the pad mounted transformer.
  • a meter - an electrical meter is able to read the power leaving the OH line and sends that information to the transformer.
  • transfer to a single phase OH from a three phase OH

Pregunta 11

Pregunta
what is the difference between a Transformer and a Pull Box?
Respuesta
  • Pull Boxes make a humming noise.
  • Transformer makes a humming noise.

Pregunta 12

Pregunta
__________ is the pressure in wire.
Respuesta
  • voltage
  • amperage
  • power

Pregunta 13

Pregunta
__________ is the flow in wire.
Respuesta
  • voltage
  • amperage
  • power

Pregunta 14

Pregunta
volts x amps = __________
Respuesta
  • power
  • watts
  • VA
  • current

Pregunta 15

Pregunta
an unsupervised open transformer is perfectly safe and nothing to worry about
Respuesta
  • True
  • False

Pregunta 16

Pregunta
what is the purpose of a disconnect switch?
Respuesta
  • able to shut off power
  • switches between AC and DC
  • pathway for wire
  • acts like a junction box

Pregunta 17

Pregunta
an electrician is indoors, in air-conditioned space, pulling wire through a conduit that is threaded. what is wrong with this scenario?
Respuesta
  • electrician is doing nothing wrong.
  • electrician is pulling wire through an IMC/RMC
  • electrician is pulling wire through EMT
  • electrician is pulling wire through PVC

Pregunta 18

Pregunta
EMT pipe is connected in two ways:
Respuesta
  • compression
  • set screws
  • threaded
  • cement/glue

Pregunta 19

Pregunta
Thickest pipe wall is _____
Respuesta
  • RMC
  • IMC
  • EMT

Pregunta 20

Pregunta
this conduit is better at taking physical damage, better than EMT at resisting corrosion.
Respuesta
  • IMC/RMC
  • PVC
  • Copper
  • Aluminum

Pregunta 21

Pregunta
this conduit is BEST at running conduit underground.
Respuesta
  • PVC
  • EMT
  • IMC/RMC

Pregunta 22

Pregunta
PVC is great at running conduit above ground
Respuesta
  • True
  • False

Pregunta 23

Pregunta
EMT Stands for Electrical Metallic Tubing
Respuesta
  • True
  • False

Pregunta 24

Pregunta
EMT can be ran underground
Respuesta
  • True
  • False

Pregunta 25

Pregunta
EMT comes in _____ lengths
Respuesta
  • 10'
  • 5'
  • 20'
  • 1'

Pregunta 26

Pregunta
from running conduit outside of the home to inside of the home, what is used to make the transition?
Respuesta
  • Line Box (LB)
  • Junction Box (J-Box)
  • Flex Conduit
  • Pull Box

Pregunta 27

Pregunta
What is the 360 degree rule?
Respuesta
  • when four 90 degree bends have been made for conduit, a junction box needs to be placed to reset the degree of bends to 0.
  • You can not twist wire more than 360 degrees when pulling wire.
  • flex conduit is only to be used when wire needs to go around an object
  • you have to have conduit on all four sides of the junction box

Pregunta 28

Pregunta
What is the purpose of a Pull Box?
Respuesta
  • usually outdoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.
  • need to have it before any transformer.
  • acts the same as a transformer just larger. can be able to handle more voltage.
  • usually indoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.

Pregunta 29

Pregunta
what is the purpose of a junction box?
Respuesta
  • usually indoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.
  • usually outdoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.
  • Need to have it before any indoor transformer,
  • Replaces the need of flex-conduit.

Pregunta 30

Pregunta
What is the difference between In-Line Metering and CT Metering?
Respuesta
  • In-Line Metering - the meter and the disconnect box are inline. While CT Metering - the meter and the disconnect box are not inline.
  • In-Line Metering - the meter and the disconnect box are not inline. While CT Metering - the meter and the disconnect box are inline.
  • In-Line Metering - the meter and the disconnect box are inline. While CT Metering - the meter and the disconnect box are inline.
  • In-Line Metering - the meter and the disconnect box are not inline. While CT Metering - the meter and the disconnect box are not inline.

Pregunta 31

Pregunta
the breaker box is the beginning of the circuit
Respuesta
  • True
  • False

Pregunta 32

Pregunta
what is a switch board?
Respuesta
  • distributes loads to several smaller load circuits (breaker panels).
  • steps-down voltage from underground to building
  • reduces volts from 12000 to 600
  • board to switch between one-pole, two-pole, and three-pole

Pregunta 33

Pregunta
what are panelboards?
Respuesta
  • divides electrical power into branch circuits throughout a building.
  • feed power to transformers.
  • feed power to switchboards.
  • 1-phase breaker box

Pregunta 34

Pregunta
what is a dead front?
Respuesta
  • covers the back of a panelboard. covers the wires.
  • a wire that has no charge. dead
  • a load (lightbulb) that has no power going to it.
  • a breaker switch that has been tripped.

Pregunta 35

Pregunta
What is a Main Circuit Breaker (MCB)
Respuesta
  • A circuit breaker that has a main switch on the dead front allowing to shut off all of the circuits within the breaker at one.
  • a circuit breaker that does not have a main switch on the dead front. have to shut off all of the circuits manually one at a time.
  • the main switch board that gets the power from the transformer.
  • if a building that only has one circuit breaker.

Pregunta 36

Pregunta
What is a Main Lug Only (MLO) breaker
Respuesta
  • A circuit breaker that has a main switch on the dead front allowing to shut off all of the circuits within the breaker at one.
  • a circuit breaker that does not have a main switch on the dead front. have to shut off all of the circuits manually one at a time.
  • the main switch board that gets the power from the transformer.
  • if a building that only has one circuit breaker.

Pregunta 37

Pregunta
An Electrician is running conduit from the slab to the MCB outside. What conduit will you need to make sure he is installing?
Respuesta
  • RMC
  • EMT
  • MC Cable
  • PVC

Pregunta 38

Pregunta
there are total of 3 phases. what are they?
Respuesta
  • 1-phase, 3-phase low, 3-phase high.
  • 1-phase, 3-phase medium, 3-phase high.
  • 1-phase, 2-phase, 3-phase.
  • 1-phase low, 1-phase high, 3-phase.

Pregunta 39

Pregunta
1-phase voltage has the combination of __________
Respuesta
  • 120/240
  • 120/208
  • 277/480
  • 110/220

Pregunta 40

Pregunta
3-phase voltage has the combination of __________
Respuesta
  • 120/240
  • 120/208
  • 277/480
  • 110/220

Pregunta 41

Pregunta
3-phase low voltage has the combination of __________
Respuesta
  • 120/240
  • 120/208
  • 277/480
  • 110/220

Pregunta 42

Pregunta
3-phase high voltage has the combination of __________
Respuesta
  • 120/240
  • 120/208
  • 277/480
  • 110/220

Pregunta 43

Pregunta
what is the difference between 1-phase and 3-phase?
Respuesta
  • 1-phase has a 3-wire configuration and a 3-phase has a 4-wire configuration.
  • 1-phase uses black, red, and blue as hot wires and 3-phase uses brown, orange (or purple), and yellow as hot wires.
  • 1-phase can have 1 and 3 pole configurations while 3-phase can have 1, 2, or 3 poles.
  • 1-phase can use either a pole mounted or a on-ground transformer while a 3-phase can only use a ground mounted.

Pregunta 44

Pregunta
3-phase high can use a pole mounted transformer.
Respuesta
  • True
  • False

Pregunta 45

Pregunta
you see an electrician installing a transformer and is installing wire that is black, red, blue and brown, orange, and yellow. what is happening?
Respuesta
  • the electrician is setting up an interior 3-phase transformer. going from high to low 3-phase.
  • the electrician is setting up an exterior 3-phase transformer. going from high to low 3-phase.
  • the electrician is setting up an interior 3-phase transformer. going from low to high 3-phase.
  • the electrician is setting up an exterior 3-phase transformer. going from low to high 3-phase.

Pregunta 46

Pregunta
120/240V is the same as 240/120V
Respuesta
  • True
  • False

Pregunta 47

Pregunta
the feeder is conduit and wire that enters a circuit panel and branches leave the circuit panel providing individual circuits to rooms/appliances.
Respuesta
  • True
  • False

Pregunta 48

Pregunta
feeders entering the circuit panels have __________
Respuesta
  • big wires (large amps)
  • small wires (small amps)
  • big wires (small amps)
  • small wires (large amps)

Pregunta 49

Pregunta
flex conduit is also known as metal clad cable
Respuesta
  • True
  • False

Pregunta 50

Pregunta
amps drive wires size. small wire = low amps large wire = high amps
Respuesta
  • True
  • False

Pregunta 51

Pregunta
which statement is true about the National Electric Code?
Respuesta
  • for equipment operating at 600 volts, electrical panels must have a minimum of 3 ft.
  • for equipment operating at 800 volts, electrical panels must have a minimum of 4 ft.
  • for equipment operating at 800 volts, electrical panels must have a minimum of 8 ft.
  • for equipment operating at 600 volts, electrical panels must have a minimum of 6 ft.

Pregunta 52

Pregunta
choose which statement is correct.
Respuesta
  • the NEC requires the area under and above a CB to be only for electrical items only. plumbing and other items are prohibited.
  • the NEC requires the area under a CB to be only for electrical items only. plumbing and other items are prohibited.
  • the NEC requires the area above a CB to be only for electrical items only. plumbing and other items are prohibited.
  • The NEC does not have any statements on whether you need a clear area above or below a CB

Pregunta 53

Pregunta
choose which statement is accurate.
Respuesta
  • the NEC requires a main disconnect switch if there are more than 6 mini-disconnects outside.
  • the NEC requires a main disconnect switch if there are more than 8 mini-disconnects outside.
  • the NEC requires a main disconnect switch if there are more than 4 mini-disconnects outside.
  • the NEC requires a main disconnect switch if there are more than 10 mini-disconnects outside.

Pregunta 54

Pregunta
There is a heavy storm in town and you're at home with your whining dog, rain and wind come and take your service power out, however, in seven seconds, your power is restored but now you hear a humming noise coming from the side of your house. what just happened?
Respuesta
  • your Automatic Transfer Switch (ATS) kicked into action and turned on the Generac to keep the house powered until Center Point can get power back on the grid.
  • Center Point lost power but it came back on in seven seconds.
  • Center Point lost power for seven seconds but it came back in seven seconds. The humming is the transformer making noise.
  • your Un-Interruptible Power Supplies (UPS) kicked into action and turned on the Generac to keep the house powered until Center Point can get power back on the grid.

Pregunta 55

Pregunta
Hospitals use this to have no interruption if power goes out. Do not even know power went out. A room that has batteries that can keep the building powered until an alternate source of energy is supplied to the building like a Generator or the Utility Company gets power back.
Respuesta
  • Un-Interruptible Power Supplies (UPS)
  • Automatic Transfer Switch (ATS)
  • Transformer
  • Main Circuit Breaker

Pregunta 56

Pregunta
1-phase systems are known as __________
Respuesta
  • 3 wire system
  • 1 wire system
  • 2 wire system
  • 4 wire system

Pregunta 57

Pregunta
3-phase systems are known as __________
Respuesta
  • 3 wire system
  • 1 wire system
  • 2 wire system
  • 4 wire system

Pregunta 58

Pregunta
which is true about a single phase?
Respuesta
  • 240 is the line-to-line
  • 120 is the line-to-neutral
  • 480 is the line-to-line
  • 277 is the line-to-neutral
  • 208 is the line-to-line

Pregunta 59

Pregunta
which is true about a three phase high?
Respuesta
  • 240 is the line-to-line
  • 120 is the line-to-neutral
  • 480 is the line-to-line
  • 277 is the line-to-neutral
  • 208 is the line-to-line

Pregunta 60

Pregunta
which is true about a three phase low?
Respuesta
  • 240 is the line-to-line
  • 120 is the line-to-neutral
  • 480 is the line-to-line
  • 277 is the line-to-neutral
  • 208 is the line-to-line

Pregunta 61

Pregunta
how can you tell the difference between a three-phase low and a single-phase circuit panel?
Respuesta
  • three-phase circuit panel has a black, red, and blue hot, white neutral, and green ground.
  • single-phase circuit panel has a black, red, and blue hot, white neutral, and green ground.
  • single-phase circuit panel has a black, and red hot, white neutral, and green ground.
  • three-phase circuit panel has a black, and red hot, white neutral, and green ground.

Pregunta 62

Pregunta
three-phase high has brown, orange/purple, and yellow hot wires.
Respuesta
  • True
  • False

Pregunta 63

Pregunta
Romex is used primarily in commercial construction
Respuesta
  • True
  • False

Pregunta 64

Pregunta
The 6'7" rule is for what?
Respuesta
  • The maximum height of a breaker switch is 6'7"
  • The maximum distance any equipment near the breaker panel is 6'7"
  • The minimum height of a breaker switch is 6'7"
  • The minimum distance any equipment near the breaker panel is 6'7"

Pregunta 65

Pregunta
the National Electric Code has a 6 handle rule. Meaning, that if a building has less than 6 disconnect, it does not need a main disconnect.
Respuesta
  • True
  • False

Pregunta 66

Pregunta
__________ is the least efficient lighting.
Respuesta
  • Incandescent
  • LED
  • Fluorescent

Pregunta 67

Pregunta
__________ lighting is hazardous for disposal.
Respuesta
  • Incandescent
  • LED
  • Fluorescent

Pregunta 68

Pregunta
__________ lighting is the most efficient.
Respuesta
  • Incandescent
  • LED
  • Fluorescent

Pregunta 69

Pregunta
blue light is 10,000K
Respuesta
  • True
  • False

Pregunta 70

Pregunta
yellow light is 3000K
Respuesta
  • True
  • False

Pregunta 71

Pregunta
Warm Light ------------------------------------------------Cool Light 10,000K----------------------------------------------------------1,000K
Respuesta
  • True
  • False

Pregunta 72

Pregunta
This is an example of a lay-in fixture, troffer, or a grid mounted lighting fixture.
Image:
Banner Parabolic Drop Ceiling Lighting (image/png)
Respuesta
  • True
  • False

Pregunta 73

Pregunta
Pendant fixtures have one cable/support suspending from a surface.
Respuesta
  • True
  • False

Pregunta 74

Pregunta
High bay/suspended lighting fixtures are at least 15' from the FFE
Respuesta
  • True
  • False

Pregunta 75

Pregunta
Recessed fixtures are flush mounted
Respuesta
  • True
  • False

Pregunta 76

Pregunta
surface lighting fixtures are stuck to the surface of a ceiling.
Respuesta
  • True
  • False

Pregunta 77

Pregunta
track mounted lighting are adjustable in direction and can be removed from the track.
Respuesta
  • True
  • False

Pregunta 78

Pregunta
an inverter is only for emergency lighting.
Respuesta
  • True
  • False

Pregunta 79

Pregunta
__________ is a popular option for emergency lighting.
Respuesta
  • bug eye
  • frog eye
  • track mounted
  • surface mounted
  • structure mounted
  • sconce

Pregunta 80

Pregunta
the [blank_start]chevron(s)[blank_end] on the EXIT signs indicate direction [blank_start]out[blank_end] of the building
Respuesta
  • chevron(s)
  • arrows
  • frog eye
  • bug eye
  • out
  • in

Pregunta 81

Pregunta
two options for controlling exterior lighting at night time.
Respuesta
  • photo cell
  • timer
  • light cell
  • wall packs

Pregunta 82

Pregunta
flag lights are usually placed at the top of a light pole
Respuesta
  • True
  • False

Pregunta 83

Pregunta
how can someone be electrocuted from a power line?
Respuesta
  • touching two lines at the same time.
  • touching the ground
  • no way to avoid it.
  • touching a single line

Pregunta 84

Pregunta
grounding is NOT needed on a building in order to function
Respuesta
  • True
  • False

Pregunta 85

Pregunta
grounding is simply a safety feature.
Respuesta
  • True
  • False

Pregunta 86

Pregunta
electrons travel underground when grounded
Respuesta
  • True
  • False

Pregunta 87

Pregunta
you can have a ground on a conduit inside of the building.
Respuesta
  • True
  • False

Pregunta 88

Pregunta
grounding moves the electrons from the load back to the __________ (final destination)
Respuesta
  • power source
  • ground
  • main distribution panel
  • electrical meter

Pregunta 89

Pregunta
answer based on if the information in the image is correct
Image:
Power Receptacle Labeled (binary/octet-stream)
Respuesta
  • True
  • False

Pregunta 90

Pregunta
answer based on if the information in the image is correct
Image:
Gfci Recectacle Labeled (binary/octet-stream)
Respuesta
  • True
  • False

Pregunta 91

Pregunta
leaders are put on top of buildings for __________________
Respuesta
  • lightning protection - path for lightning to go around the building rather than through the building
  • lightning protection - path for lightning to go in the building rather than around the building
  • electrocution protection - path for lightning to go around the building rather than through the building
  • electrocution protection - path for lightning to go in the building rather than around the building

Pregunta 92

Pregunta
3-pole breakers ONLY use 3 phase
Respuesta
  • True
  • False

Pregunta 93

Pregunta
only 1-pole and 2-pole breakers use a single phase.
Respuesta
  • True
  • False
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