Electrical Practice Exam

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 1

Steps-up/steps-down voltage

Answer 2

Only steps-up voltage

Answer 3

Only steps-down voltage

Answer 4

Steps-up/Steps-down amperage

Answer 5

Weather Head

Answer 6

protects electrical wire from rainwater

Answer 7

the point of the conduit where wire sticks out

Answer 8

allows electrician protect his head in bad weather when working

Answer 9

allows wire to bend

Answer 10

purely structural, no power going to them.

Answer 11

it is a ground wire for the overhead powerlines.

Answer 12

it feeds to the underground transformer.

Answer 13

it does not do anything.

Answer 14

Nothing, they are the same.

Answer 15

OH 1-phase has 1 transformer and a OH 3-phase has 3 transformers

Answer 16

OH 1-phase has 3 transformer and a OH 3-phase has 1 transformers

Answer 17

OH 3-phase can only be mounted on concrete poles while OH 1-phase can only be placed on a wooden pole.

Answer 18

a pull box - able to pull the line from the OH line, then can send wire to the pad mounted transformer.

Answer 19

another transformer - able to pull the line from the OH line, then cam send the wire to the pad mounted transformer.

Answer 20

a meter - an electrical meter is able to read the power leaving the OH line and sends that information to the transformer.

Answer 21

transfer to a single phase OH from a three phase OH

Answer 22

Pull Boxes make a humming noise.

Answer 23

Transformer makes a humming noise.

Answer 24

able to shut off power

Answer 25

switches between AC and DC

Answer 26

pathway for wire

Answer 27

acts like a junction box

Answer 28

electrician is doing nothing wrong.

Answer 29

electrician is pulling wire through an IMC/RMC

Answer 30

electrician is pulling wire through EMT

Answer 31

electrician is pulling wire through PVC

Answer 32

compression

Answer 33

set screws

Answer 34

cement/glue

Answer 35

Line Box (LB)

Answer 36

Junction Box (J-Box)

Answer 37

Flex Conduit

Answer 38

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.

Answer 39

You can not twist wire more than 360 degrees when pulling wire.

Answer 40

flex conduit is only to be used when wire needs to go around an object

Answer 41

you have to have conduit on all four sides of the junction box

Answer 42

usually outdoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.

Answer 43

need to have it before any transformer.

Answer 44

acts the same as a transformer just larger. can be able to handle more voltage.

Answer 45

usually indoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.

Answer 46

usually indoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.

Answer 47

usually outdoors - acts as a pull point for wire, wire connection protection, and able to change wire direction.

Answer 48

Need to have it before any indoor transformer,

Answer 49

Replaces the need of flex-conduit.

Answer 50

In-Line Metering - the meter and the disconnect box are inline. While CT Metering - the meter and the disconnect box are not inline.

Answer 51

In-Line Metering - the meter and the disconnect box are not inline. While CT Metering - the meter and the disconnect box are inline.

Answer 52

In-Line Metering - the meter and the disconnect box are inline. While CT Metering - the meter and the disconnect box are inline.

Answer 53

In-Line Metering - the meter and the disconnect box are not inline. While CT Metering - the meter and the disconnect box are not inline.

Answer 54

distributes loads to several smaller load circuits (breaker panels).

Answer 55

steps-down voltage from underground to building

Answer 56

reduces volts from 12000 to 600

Answer 57

board to switch between one-pole, two-pole, and three-pole

Answer 58

divides electrical power into branch circuits throughout a building.

Answer 59

feed power to transformers.

Answer 60

feed power to switchboards.

Answer 61

1-phase breaker box

Answer 62

covers the back of a panelboard. covers the wires.

Answer 63

a wire that has no charge. dead

Answer 64

a load (lightbulb) that has no power going to it.

Answer 65

a breaker switch that has been tripped.

Answer 66

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.

Answer 67

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.

Answer 68

the main switch board that gets the power from the transformer.

Answer 69

if a building that only has one circuit breaker.

Answer 70

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.

Answer 71

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.

Answer 72

the main switch board that gets the power from the transformer.

Answer 73

if a building that only has one circuit breaker.

Answer 74

1-phase, 3-phase low, 3-phase high.

Answer 75

1-phase, 3-phase medium, 3-phase high.

Answer 76

1-phase, 2-phase, 3-phase.

Answer 77

1-phase low, 1-phase high, 3-phase.

Answer 78

1-phase has a 3-wire configuration and a 3-phase has a 4-wire configuration.

Answer 79

1-phase uses black, red, and blue as hot wires and 3-phase uses brown, orange (or purple), and yellow as hot wires.

Answer 80

1-phase can have 1 and 3 pole configurations while 3-phase can have 1, 2, or 3 poles.

Answer 81

1-phase can use either a pole mounted or a on-ground transformer while a 3-phase can only use a ground mounted.

Answer 82

the electrician is setting up an interior 3-phase transformer. going from high to low 3-phase.

Answer 83

the electrician is setting up an exterior 3-phase transformer. going from high to low 3-phase.

Answer 84

the electrician is setting up an interior 3-phase transformer. going from low to high 3-phase.

Answer 85

the electrician is setting up an exterior 3-phase transformer. going from low to high 3-phase.

Answer 86

big wires (large amps)

Answer 87

small wires (small amps)

Answer 88

big wires (small amps)

Answer 89

small wires (large amps)

Answer 90

for equipment operating at 600 volts, electrical panels must have a minimum of 3 ft.

Answer 91

for equipment operating at 800 volts, electrical panels must have a minimum of 4 ft.

Answer 92

for equipment operating at 800 volts, electrical panels must have a minimum of 8 ft.

Answer 93

for equipment operating at 600 volts, electrical panels must have a minimum of 6 ft.

Answer 94

the NEC requires the area under and above a CB to be only for electrical items only. plumbing and other items are prohibited.

Answer 95

the NEC requires the area under a CB to be only for electrical items only. plumbing and other items are prohibited.

Answer 96

the NEC requires the area above a CB to be only for electrical items only. plumbing and other items are prohibited.

Answer 97

The NEC does not have any statements on whether you need a clear area above or below a CB

Answer 98

the NEC requires a main disconnect switch if there are more than 6 mini-disconnects outside.

Answer 99

the NEC requires a main disconnect switch if there are more than 8 mini-disconnects outside.

Answer 100

the NEC requires a main disconnect switch if there are more than 4 mini-disconnects outside.

Answer 101

the NEC requires a main disconnect switch if there are more than 10 mini-disconnects outside.

Answer 102

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.

Answer 103

Center Point lost power but it came back on in seven seconds.

Answer 104

Center Point lost power for seven seconds but it came back in seven seconds. The humming is the transformer making noise.

Answer 105

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.

Answer 106

Un-Interruptible Power Supplies (UPS)

Answer 107

Automatic Transfer Switch (ATS)

Answer 108

Transformer

Answer 109

Main Circuit Breaker

Answer 110

3 wire system

Answer 111

1 wire system

Answer 112

2 wire system

Answer 113

4 wire system

Answer 114

3 wire system

Answer 115

1 wire system

Answer 116

2 wire system

Answer 117

4 wire system

Answer 118

240 is the line-to-line

Answer 119

120 is the line-to-neutral

Answer 120

480 is the line-to-line

Answer 121

277 is the line-to-neutral

Answer 122

208 is the line-to-line

Answer 123

240 is the line-to-line

Answer 124

120 is the line-to-neutral

Answer 125

480 is the line-to-line

Answer 126

277 is the line-to-neutral

Answer 127

208 is the line-to-line

Answer 128

240 is the line-to-line

Answer 129

120 is the line-to-neutral

Answer 130

480 is the line-to-line

Answer 131

277 is the line-to-neutral

Answer 132

208 is the line-to-line

Answer 133

three-phase circuit panel has a black, red, and blue hot, white neutral, and green ground.

Answer 134

single-phase circuit panel has a black, red, and blue hot, white neutral, and green ground.

Answer 135

single-phase circuit panel has a black, and red hot, white neutral, and green ground.

Answer 136

three-phase circuit panel has a black, and red hot, white neutral, and green ground.

Answer 137

The maximum height of a breaker switch is 6'7"

Answer 138

The maximum distance any equipment near the breaker panel is 6'7"

Answer 139

The minimum height of a breaker switch is 6'7"

Answer 140

The minimum distance any equipment near the breaker panel is 6'7"

Answer 141

Incandescent

Answer 142

Fluorescent

Answer 143

Incandescent

Answer 144

Fluorescent

Answer 145

Incandescent

Answer 146

Fluorescent

Answer 147

track mounted

Answer 148

surface mounted

Answer 149

structure mounted

Answer 150

chevron(s)

Answer 151

photo cell

Answer 152

light cell

Answer 153

wall packs

Answer 154

touching two lines at the same time.

Answer 155

touching the ground

Answer 156

no way to avoid it.

Answer 157

touching a single line

Answer 158

power source

Answer 159

main distribution panel

Answer 160

electrical meter

Answer 161

lightning protection - path for lightning to go around the building rather than through the building

Answer 162

lightning protection - path for lightning to go in the building rather than around the building

Answer 163

electrocution protection - path for lightning to go around the building rather than through the building

Answer 164

electrocution protection - path for lightning to go in the building rather than around the building

	Criado por Tyler Warford mais de 1 ano atrás

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