Electrical Practice Exam

Question 1 of 93

1

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?

Select one of the following:

LOTO
Arc Flash
NEC
XFMR

Explanation

Question 2 of 93

1

LOTO can be placed on both Disconnects and Switches inside of Control Panels?

Select one of the following:

True
False

Explanation

Question 3 of 93

1

How many volts are in OH1 coming to a building?

Select one of the following:

12,000
600
240
408

Explanation

Question 4 of 93

1

Which unit is a Transformer altering?

Select one of the following:

Volts
VA
Amps
Watts

Explanation

Question 5 of 93

1

What does a transformer do?

Select one of the following:

Steps-up/steps-down voltage
Only steps-up voltage
Only steps-down voltage
Steps-up/Steps-down amperage

Explanation

Question 6 of 93

1

_____ come off of the transformer and go to the building.

Select one of the following:

OH1
OH2
Meter
Weather Head

Explanation

Question 7 of 93

1

what is the purpose of a Weather Head?

Select one of the following:

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

Explanation

Question 8 of 93

1

what is the purpose of a guy wire?

Select one of the following:

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.

Explanation

Question 9 of 93

1

what is the difference between OH 1-phase and OH 3-phase?

Select one of the following:

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.

Explanation

Question 10 of 93

1

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?

Select one of the following:

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

Explanation

Question 11 of 93

1

what is the difference between a Transformer and a Pull Box?

Select one of the following:

Pull Boxes make a humming noise.
Transformer makes a humming noise.

Explanation

Question 12 of 93

1

__________ is the pressure in wire.

Select one of the following:

voltage
amperage
power

Explanation

Question 13 of 93

1

__________ is the flow in wire.

Select one of the following:

voltage
amperage
power

Explanation

Question 14 of 93

1

volts x amps = __________

Select one or more of the following:

power
watts
VA
current

Explanation

Question 15 of 93

1

an unsupervised open transformer is perfectly safe and nothing to worry about

Select one of the following:

True
False

Explanation

Question 16 of 93

1

what is the purpose of a disconnect switch?

Select one of the following:

able to shut off power
switches between AC and DC
pathway for wire
acts like a junction box

Explanation

Question 17 of 93

1

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

Select one of the following:

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

Explanation

Question 18 of 93

1

EMT pipe is connected in two ways:

Select one or more of the following:

compression
set screws
threaded
cement/glue

Explanation

Question 19 of 93

1

Thickest pipe wall is _____

Select one of the following:

RMC
IMC
EMT

Explanation

Question 20 of 93

1

this conduit is better at taking physical damage, better than EMT at resisting corrosion.

Select one of the following:

IMC/RMC
PVC
Copper
Aluminum

Explanation

Question 21 of 93

1

this conduit is BEST at running conduit underground.

Select one of the following:

PVC
EMT
IMC/RMC

Explanation

Question 22 of 93

1

PVC is great at running conduit above ground

Select one of the following:

True
False

Explanation

Question 23 of 93

1

EMT Stands for Electrical Metallic Tubing

Select one of the following:

True
False

Explanation

Question 24 of 93

1

EMT can be ran underground

Select one of the following:

True
False

Explanation

Question 25 of 93

1

EMT comes in _____ lengths

Select one of the following:

10'
5'
20'
1'

Explanation

Question 26 of 93

1

from running conduit outside of the home to inside of the home, what is used to make the transition?

Select one of the following:

Line Box (LB)
Junction Box (J-Box)
Flex Conduit
Pull Box

Explanation

Question 27 of 93

1

What is the 360 degree rule?

Select one of the following:

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

Explanation

Question 28 of 93

1

What is the purpose of a Pull Box?

Select one of the following:

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.

Explanation

Question 29 of 93

1

what is the purpose of a junction box?

Select one of the following:

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.

Explanation

Question 30 of 93

1

What is the difference between In-Line Metering and CT Metering?

Select one of the following:

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.

Explanation

Question 31 of 93

1

the breaker box is the beginning of the circuit

Select one of the following:

True
False

Explanation

Question 32 of 93

1

what is a switch board?

Select one of the following:

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

Explanation

Question 33 of 93

1

what are panelboards?

Select one of the following:

divides electrical power into branch circuits throughout a building.
feed power to transformers.
feed power to switchboards.
1-phase breaker box

Explanation

Question 34 of 93

1

what is a dead front?

Select one of the following:

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.

Explanation

Question 35 of 93

1

What is a Main Circuit Breaker (MCB)

Select one of the following:

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.

Explanation

Question 36 of 93

1

What is a Main Lug Only (MLO) breaker

Select one of the following:

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.

Explanation

Question 37 of 93

1

An Electrician is running conduit from the slab to the MCB outside. What conduit will you need to make sure he is installing?

Select one of the following:

RMC
EMT
MC Cable
PVC

Explanation

Question 38 of 93

1

there are total of 3 phases. what are they?

Select one of the following:

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.

Explanation

Question 39 of 93

1

1-phase voltage has the combination of __________

Select one or more of the following:

120/240
120/208
277/480
110/220

Explanation

Question 40 of 93

1

3-phase voltage has the combination of __________

Select one or more of the following:

120/240
120/208
277/480
110/220

Explanation

Question 41 of 93

1

3-phase low voltage has the combination of __________

Select one or more of the following:

120/240
120/208
277/480
110/220

Explanation

Question 42 of 93

1

3-phase high voltage has the combination of __________

Select one or more of the following:

120/240
120/208
277/480
110/220

Explanation

Question 43 of 93

1

what is the difference between 1-phase and 3-phase?

Select one of the following:

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.

Explanation

Question 44 of 93

1

3-phase high can use a pole mounted transformer.

Select one of the following:

True
False

Explanation

Question 45 of 93

1

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

Select one of the following:

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.

Explanation

Question 46 of 93

1

120/240V is the same as 240/120V

Select one of the following:

True
False

Explanation

Question 47 of 93

1

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

Select one of the following:

True
False

Explanation

Question 48 of 93

1

feeders entering the circuit panels have __________

Select one of the following:

big wires (large amps)
small wires (small amps)
big wires (small amps)
small wires (large amps)

Explanation

Question 49 of 93

1

flex conduit is also known as metal clad cable

Select one of the following:

True
False

Explanation

Question 50 of 93

1

amps drive wires size.
small wire = low amps
large wire = high amps

Select one of the following:

True
False

Explanation

Question 51 of 93

1

which statement is true about the National Electric Code?

Select one of the following:

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.

Explanation

Question 52 of 93

1

choose which statement is correct.

Select one of the following:

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

Explanation

Question 53 of 93

1

choose which statement is accurate.

Select one of the following:

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.

Explanation

Question 54 of 93

1

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?

Select one of the following:

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.

Explanation

Question 55 of 93

1

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.

Select one of the following:

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

Explanation

Question 56 of 93

1

1-phase systems are known as __________

Select one of the following:

3 wire system
1 wire system
2 wire system
4 wire system

Explanation

Question 57 of 93

1

3-phase systems are known as __________

Select one of the following:

3 wire system
1 wire system
2 wire system
4 wire system

Explanation

Question 58 of 93

1

which is true about a single phase?

Select one or more of the following:

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

Explanation

Question 59 of 93

1

which is true about a three phase high?

Select one or more of the following:

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

Explanation

Question 60 of 93

1

which is true about a three phase low?

Select one or more of the following:

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

Explanation

Question 61 of 93

1

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

Select one or more of the following:

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.

Explanation

Question 62 of 93

1

three-phase high has brown, orange/purple, and yellow hot wires.

Select one of the following:

True
False

Explanation

Question 63 of 93

1

Romex is used primarily in commercial construction

Select one of the following:

True
False

Explanation

Question 64 of 93

1

The 6'7" rule is for what?

Select one of the following:

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"

Explanation

Question 65 of 93

1

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.

Select one of the following:

True
False

Explanation

Question 66 of 93

1

__________ is the least efficient lighting.

Select one of the following:

Incandescent
LED
Fluorescent

Explanation

Question 67 of 93

1

__________ lighting is hazardous for disposal.

Select one of the following:

Incandescent
LED
Fluorescent

Explanation

Question 68 of 93

1

__________ lighting is the most efficient.

Select one of the following:

Incandescent
LED
Fluorescent

Explanation

Question 69 of 93

1

blue light is 10,000K

Select one of the following:

True
False

Explanation

Question 70 of 93

1

yellow light is 3000K

Select one of the following:

True
False

Explanation

Question 71 of 93

1

Warm Light ------------------------------------------------Cool Light
10,000K----------------------------------------------------------1,000K

Select one of the following:

True
False

Explanation

Question 72 of 93

1

This is an example of a lay-in fixture, troffer, or a grid mounted lighting fixture.

Select one of the following:

True
False

Explanation

Question 73 of 93

1

Pendant fixtures have one cable/support suspending from a surface.

Select one of the following:

True
False

Explanation

Question 74 of 93

1

High bay/suspended lighting fixtures are at least 15' from the FFE

Select one of the following:

True
False

Explanation

Question 75 of 93

1

Recessed fixtures are flush mounted

Select one of the following:

True
False

Explanation

Question 76 of 93

1

surface lighting fixtures are stuck to the surface of a ceiling.

Select one of the following:

True
False

Explanation

Question 77 of 93

1

track mounted lighting are adjustable in direction and can be removed from the track.

Select one of the following:

True
False

Explanation

Question 78 of 93

1

an inverter is only for emergency lighting.

Select one of the following:

True
False

Explanation

Question 79 of 93

1

__________ is a popular option for emergency lighting.

Select one or more of the following:

bug eye
frog eye
track mounted
surface mounted
structure mounted
sconce

Explanation

Question 80 of 93

1

Select from the dropdown lists to complete the text.

the ( chevron(s), arrows, frog eye, bug eye ) on the EXIT signs indicate direction ( out, in ) of the building

Explanation

Question 81 of 93

1

two options for controlling exterior lighting at night time.

Select one or more of the following:

photo cell
timer
light cell
wall packs

Explanation

Question 82 of 93

1

flag lights are usually placed at the top of a light pole

Select one of the following:

True
False

Explanation

Question 83 of 93

1

how can someone be electrocuted from a power line?

Select one or more of the following:

touching two lines at the same time.
touching the ground
no way to avoid it.
touching a single line

Explanation

Question 84 of 93

1

grounding is NOT needed on a building in order to function

Select one of the following:

True
False

Explanation

Question 85 of 93

1

grounding is simply a safety feature.

Select one of the following:

True
False

Explanation

Question 86 of 93

1

electrons travel underground when grounded

Select one of the following:

True
False

Explanation

Question 87 of 93

1

you can have a ground on a conduit inside of the building.

Select one of the following:

True
False

Explanation

Question 88 of 93

1

grounding moves the electrons from the load back to the __________ (final destination)

Select one of the following:

power source
ground
main distribution panel
electrical meter

Explanation

Question 89 of 93

1

answer based on if the information in the image is correct

Select one of the following:

True
False

Explanation

Question 90 of 93

1

answer based on if the information in the image is correct

Select one of the following:

True
False

Explanation

Question 91 of 93

1

leaders are put on top of buildings for __________________

Select one of the following:

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

	Created by Tyler Warford 11 months ago

construction Quiz on Electrical Practice Exam, created by Tyler Warford on 01/11/2023.

Electrical Practice Exam

Electrical Practice Exam

Question 1 of 93

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?

Select one of the following:

Explanation

Question 2 of 93

LOTO can be placed on both Disconnects and Switches inside of Control Panels?

Select one of the following:

Explanation

Question 3 of 93

How many volts are in OH1 coming to a building?

Select one of the following:

Explanation

Question 4 of 93

Which unit is a Transformer altering?

Select one of the following:

Explanation

Question 5 of 93

What does a transformer do?

Select one of the following:

Explanation

Question 6 of 93

_____ come off of the transformer and go to the building.

Select one of the following:

Explanation

Question 7 of 93

what is the purpose of a Weather Head?

Select one of the following:

Explanation

Question 8 of 93

what is the purpose of a guy wire?

Select one of the following:

Explanation

Question 9 of 93

what is the difference between OH 1-phase and OH 3-phase?

Select one of the following:

Explanation

Question 10 of 93

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?

Select one of the following:

Explanation

Question 11 of 93

what is the difference between a Transformer and a Pull Box?

Select one of the following:

Explanation

Question 12 of 93

__________ is the pressure in wire.

Select one of the following:

Explanation

Question 13 of 93

__________ is the flow in wire.

Select one of the following:

Explanation

Question 14 of 93

volts x amps = __________

Select one or more of the following:

Explanation

Question 15 of 93

an unsupervised open transformer is perfectly safe and nothing to worry about

Select one of the following:

Explanation

Question 16 of 93

what is the purpose of a disconnect switch?

Select one of the following:

Explanation

Question 17 of 93

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

Select one of the following:

Explanation

Question 18 of 93

EMT pipe is connected in two ways:

Select one or more of the following:

Explanation

Question 19 of 93

Thickest pipe wall is _____

Select one of the following:

Explanation

Question 20 of 93