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Electrical Practice Exam

Description

construction Quiz on Electrical Practice Exam, created by Tyler Warford on 01/11/2023.
Tyler Warford
Quiz by Tyler Warford, updated 6 months ago
Tyler Warford
Created by Tyler Warford 7 months ago
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Resource summary

Question 1

Question
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?
Answer
  • LOTO
  • Arc Flash
  • NEC
  • XFMR

Question 2

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

Question 3

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

Question 4

Question
Which unit is a Transformer altering?
Answer
  • Volts
  • VA
  • Amps
  • Watts

Question 5

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

Question 6

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

Question 7

Question
what is the purpose of a Weather Head?
Answer
  • 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

Question 8

Question
what is the purpose of a guy wire?
Answer
  • 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.

Question 9

Question
what is the difference between OH 1-phase and OH 3-phase?
Answer
  • 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.

Question 10

Question
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?
Answer
  • 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

Question 11

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

Question 12

Question
__________ is the pressure in wire.
Answer
  • voltage
  • amperage
  • power

Question 13

Question
__________ is the flow in wire.
Answer
  • voltage
  • amperage
  • power

Question 14

Question
volts x amps = __________
Answer
  • power
  • watts
  • VA
  • current

Question 15

Question
an unsupervised open transformer is perfectly safe and nothing to worry about
Answer
  • True
  • False

Question 16

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

Question 17

Question
an electrician is indoors, in air-conditioned space, pulling wire through a conduit that is threaded. what is wrong with this scenario?
Answer
  • 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

Question 18

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

Question 19

Question
Thickest pipe wall is _____
Answer
  • RMC
  • IMC
  • EMT

Question 20

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

Question 21

Question
this conduit is BEST at running conduit underground.
Answer
  • PVC
  • EMT
  • IMC/RMC

Question 22

Question
PVC is great at running conduit above ground
Answer
  • True
  • False

Question 23

Question
EMT Stands for Electrical Metallic Tubing
Answer
  • True
  • False

Question 24

Question
EMT can be ran underground
Answer
  • True
  • False

Question 25

Question
EMT comes in _____ lengths
Answer
  • 10'
  • 5'
  • 20'
  • 1'

Question 26

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

Question 27

Question
What is the 360 degree rule?
Answer
  • 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

Question 28

Question
What is the purpose of a Pull Box?
Answer
  • 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.

Question 29

Question
what is the purpose of a junction box?
Answer
  • 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.

Question 30

Question
What is the difference between In-Line Metering and CT Metering?
Answer
  • 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.

Question 31

Question
the breaker box is the beginning of the circuit
Answer
  • True
  • False

Question 32

Question
what is a switch board?
Answer
  • 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

Question 33

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

Question 34

Question
what is a dead front?
Answer
  • 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.

Question 35

Question
What is a Main Circuit Breaker (MCB)
Answer
  • 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.

Question 36

Question
What is a Main Lug Only (MLO) breaker
Answer
  • 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.

Question 37

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

Question 38

Question
there are total of 3 phases. what are they?
Answer
  • 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.

Question 39

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

Question 40

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

Question 41

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

Question 42

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

Question 43

Question
what is the difference between 1-phase and 3-phase?
Answer
  • 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.

Question 44

Question
3-phase high can use a pole mounted transformer.
Answer
  • True
  • False

Question 45

Question
you see an electrician installing a transformer and is installing wire that is black, red, blue and brown, orange, and yellow. what is happening?
Answer
  • 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.

Question 46

Question
120/240V is the same as 240/120V
Answer
  • True
  • False

Question 47

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

Question 48

Question
feeders entering the circuit panels have __________
Answer
  • big wires (large amps)
  • small wires (small amps)
  • big wires (small amps)
  • small wires (large amps)

Question 49

Question
flex conduit is also known as metal clad cable
Answer
  • True
  • False

Question 50

Question
amps drive wires size. small wire = low amps large wire = high amps
Answer
  • True
  • False

Question 51

Question
which statement is true about the National Electric Code?
Answer
  • 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.

Question 52

Question
choose which statement is correct.
Answer
  • 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

Question 53

Question
choose which statement is accurate.
Answer
  • 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.

Question 54

Question
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?
Answer
  • 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.

Question 55

Question
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.
Answer
  • Un-Interruptible Power Supplies (UPS)
  • Automatic Transfer Switch (ATS)
  • Transformer
  • Main Circuit Breaker

Question 56

Question
1-phase systems are known as __________
Answer
  • 3 wire system
  • 1 wire system
  • 2 wire system
  • 4 wire system

Question 57

Question
3-phase systems are known as __________
Answer
  • 3 wire system
  • 1 wire system
  • 2 wire system
  • 4 wire system

Question 58

Question
which is true about a single phase?
Answer
  • 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

Question 59

Question
which is true about a three phase high?
Answer
  • 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

Question 60

Question
which is true about a three phase low?
Answer
  • 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

Question 61

Question
how can you tell the difference between a three-phase low and a single-phase circuit panel?
Answer
  • 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.

Question 62

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

Question 63

Question
Romex is used primarily in commercial construction
Answer
  • True
  • False

Question 64

Question
The 6'7" rule is for what?
Answer
  • 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"

Question 65

Question
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.
Answer
  • True
  • False

Question 66

Question
__________ is the least efficient lighting.
Answer
  • Incandescent
  • LED
  • Fluorescent

Question 67

Question
__________ lighting is hazardous for disposal.
Answer
  • Incandescent
  • LED
  • Fluorescent

Question 68

Question
__________ lighting is the most efficient.
Answer
  • Incandescent
  • LED
  • Fluorescent

Question 69

Question
blue light is 10,000K
Answer
  • True
  • False

Question 70

Question
yellow light is 3000K
Answer
  • True
  • False

Question 71

Question
Warm Light ------------------------------------------------Cool Light 10,000K----------------------------------------------------------1,000K
Answer
  • True
  • False

Question 72

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

Question 73

Question
Pendant fixtures have one cable/support suspending from a surface.
Answer
  • True
  • False

Question 74

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

Question 75

Question
Recessed fixtures are flush mounted
Answer
  • True
  • False

Question 76

Question
surface lighting fixtures are stuck to the surface of a ceiling.
Answer
  • True
  • False

Question 77

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

Question 78

Question
an inverter is only for emergency lighting.
Answer
  • True
  • False

Question 79

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

Question 80

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

Question 81

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

Question 82

Question
flag lights are usually placed at the top of a light pole
Answer
  • True
  • False

Question 83

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

Question 84

Question
grounding is NOT needed on a building in order to function
Answer
  • True
  • False

Question 85

Question
grounding is simply a safety feature.
Answer
  • True
  • False

Question 86

Question
electrons travel underground when grounded
Answer
  • True
  • False

Question 87

Question
you can have a ground on a conduit inside of the building.
Answer
  • True
  • False

Question 88

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

Question 89

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

Question 90

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

Question 91

Question
leaders are put on top of buildings for __________________
Answer
  • 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

Question 92

Question
3-pole breakers ONLY use 3 phase
Answer
  • True
  • False

Question 93

Question
only 1-pole and 2-pole breakers use a single phase.
Answer
  • True
  • False
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