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NCCER Test Flashcards

1
Q

The NEC recommends maintaining voltage within a 3% drop. If a branch circuit operates at 240 volts AC. What is the minimum circuit operating volt?

A.210
B.220
C.232
D.240

A

C. 232

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2
Q

What is the name of the connecting device shown in the diagram?

A. Split - bolt
B. Mechanical lug
C.threaded nipple
D.ground bushing

A

Split-bolt

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3
Q

The volt amperes in an AC circuit is the same as

A. true power
B. capacitance power
C. Apparent power
D. Square power

A

Apparent power

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4
Q

What is the voltage drop for a #8 (16.510 cmil) copper wire at 120v. 215 feet one way and a load of 39 amps?

A. 10.5
B. 13.1
C. 14.2
D. 7.5

A

13.1

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5
Q

If a voltage source of a circuit provides 240 volts and there are 5 ohms of resistance, how much current is in the circuit?

A. 20amps
B. 25amps
C. 48amps
D. 235amps

A

48amps

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6
Q

What should be done to change rotation of a 3 phase motor?

A. SWAP any T-lead
B. Swap any two T leads
C. Swap all thee Tleads
D. Swap the red and yellow leads

A

Swap any two T leads

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7
Q

What instrument is used to measure current

A. Oh meter
B.Wattmeter
C. Ammeter
D. Voltmeter

A

Voltmeter

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8
Q

Which plan indicates the location of structures and equipment on a property

A. Floor
B. Section View
C. Detail Drawing
D. Site

A

Detail Drawing

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9
Q

Generally , the most ideal conductor is made of:
A. Bronze
B. Brass
C .Aluminum
D. Copper

A

Copper

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10
Q

What is the standard size system used in the united states? A. AWG
B. UL
C. ANSI
D. NEC

A

AWG

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11
Q

What is insulating tape?
A. Adhesive tape that has been manufactured to keep the conductors warm
B. Non-adhesive tape used to cover devices
C. Non-Conductive adhesive tape
D. Non-adhesive tape used as phase tape.

A

Non-Conductive adhesive tape

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12
Q

Which of these is used as a guide to assist cables entering a conduit?
A. Swivel
B. Piston
C. Clevis
D. Sheave

A

Sheave

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13
Q

Which of the following is not a reason why electrical systems must be grounded?

A. Dissipate lighting
B. Voltage surges higher than circuit design
C. Stabilize MAXIMUM potential to ground due to abnormal voltages
D. Limit the potential between ungrounded conductors

A

Dissipate lighting

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14
Q

What type of conduit body is characterized by a threaded straight hub on each end?

A. C
B. T
C. X
D. Y

A

C

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15
Q

A merger will be used to check an in-service cable. The Electrician MUST be sure that the circuit is:

A. Live and at operating voltage
B. Live and at operating amperage
C. De-energized and locked tagged out, and tested
D. De-energized with the cable ends taped together

A

De-energized and locked tagged out, and tested

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16
Q

Rubber gloves Must be electrically tested at Maximum intervals of

A. 1 month
B. 3 month
C. 6 months
D. 1 year

A

6 months

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17
Q

A dangerously high voltage is produced when someone opens the secondary circuit of a:

A. Potential transformer
B. Current transformer
C. Isolation transformer
D. Auto transformer

A

Current Transformer

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18
Q

Which choice best describes the two types of pushbutton operators typically used in motor controls
A. Open and closed
B. Mushroom and Rotary Selector
C. Momentary and maintained
D. Latching and Unlatching

A

Open and closed

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19
Q

In the event of an emergency where the lockout/ tagout device is left secured, who can remove the lockout/tagout device?
A. Any employee
B. Any electrical
C. Equipment installer
D. Authorize supervisor

A

Authorize supervisor

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20
Q

A drawing showing a point A to point B hookup of conductors is called a:
A. Section
B. Plot plan
C. Wiring diagram
D. P&ID

A

Wiring diagram

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21
Q

A NEMA type___ enclosure is both watertight and corrosion- resistant.
A. 12
B. 12X
C. 4
D. 4X

A

4X

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22
Q

What’s the MAIN characteristic of a confined space?
A. Limited access and egress
B. Low overhead clearance
C. Inadequate task lighting
D. Area requiring a ladder for access

A

Limited access and egress

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23
Q

Which of the following BEST describes where the type and size of overcurrent protection is found?
A. Panelboard schedule
B. Floor plans *
C. Lighting fixture schedule
D. Cross- sectional views

A

Panel board schedule

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24
Q

A Type “X” conduit body has how many conduit entries

A. 3
B. 4
C. 5
D. 7

A

4

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25
Q

What test equipment can be used to test the condition of insulation in electrical apparatus?
A. Wattmeter
B. Megohmmeter c. Voltmeter
D. Ammeter

A

Megohmmeter

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26
Q

The opposing force to a flow of alternating current is called:
A. Reluctance
B. Resistors
C. Reactance
D. Induction

A

Reactance

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27
Q

That is a trapeze type support
A. A support that allows the tray to swing
B. A support that has a swing seat shaped bracket mounted to a vertical wall C. A single threaded rod supporting a steel channel or strut
D. Two threaded rods supporting a channel or strut

A

Two threaded rods supporting a channel or strut

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28
Q

The opposition to current flow referred to as:

A. Voltage
B. Capcitance
C.resistance
D. deflection

A

Resistance

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29
Q

The type of mounting used for lighting fixtures is indicated in the:
A. Floor plans
B. electrical drawings
C. lighting fixture specifications
D. lighting fixture schedule

A

Electrical drawings

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30
Q

Verifying the presence or absence of voltage should be performed only by:

A. A spotter
B. Qualified Individuals
C. Management
D. Operations

A

Qualified individuals

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31
Q

What is shown on a sectional drawing?
A. Cutaway view of a building*
B. Top view of a building
C. Front view of a building
D. side view of a building

A

Side view of a building

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32
Q

A conductor with 220 mils of insulation would have insulation thickness of:
A. 0.22”
B. 2.2”
C. 22”
D. 220”

A

0.22

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33
Q

The recommended method of attaching self- regulating heating cables to pipes is by using:
A. Duct tape
B. Fiberglass tape
C. vinyl electrical tape
D. Metal banding

A

Fiberglass tape

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34
Q

An auxiliary holding contact ( seal- in) on a typically NEMA starter is indicated by the terminal marking:
A. 13 & 14
B. 2 & 3
C. T1 & T2
D. A1 & A2*

A

13 & 14

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35
Q

When is it required that conductors be derated?
A. When there are three or fewer conductors in a conduit.
B. When there are three current conductors and one grounded conductor.
C. When there are four or more current- carrying conductors in a conduit
D. When there are #8 AWG conductors or larger conduit.

A

When there are four or more current- carrying conductors in a conduit

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36
Q

The conductors used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding:
A. Electrode*
B. Electrode conductor
C. Rod conductor
D. Rod

A

Electrode conductor

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37
Q

The equipment grounding conductor is used to interconnect and bond:
A. Conduit enclosures
B. Non- current- carrying metal parts
C. Grounding enclosures
D. Multiple disconnects*

A

Non-current-carrying metal parts

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38
Q

The ungrounded conductor of a 240/120 three phase Delta 4 wire system that has the higher voltage to ground MUST be identified with the color:

A. Yellow
B. Orange
C. Brown
D. Gray

A

Orange

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39
Q

. The AIC Rating of an overcurrent protection device represents its:
A. Lowest allowable arc intensity charge
B. highest allowable arc intensity charge
C. MAXIMUM fault current the device will interrupt
D. MINIMUM fault current the device will interrupt

A

Maximum fault current the device will interrupt

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40
Q

The resistor alloy- heating element used in power- limiting heating cables has a:

A. positive temperature coefficient
B. Negative temperature coefficient
C. Neutral temperature coefficient
D. Parallel temperature coefficient*

A

Positive temperature coefficient

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41
Q

What is a system of grounding electrodes interconnected by grounding conductors that are buried in the earth to provide lower resistance?
A. A ground circuit
B. A ground resistance field
C. A ground grid
D. A ground mat

A

A ground grid

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42
Q

Cable markings show all the following EXCEPT:
A. Wire size
B. Voltage rating
C. number of conductors
D. Ampacity

A

Ampacity

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43
Q

How many paths for current flow are in a current consisting of 4 resistors in parallel?

A.1
B.2
C.3
D.4

A

4

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44
Q

Horsepower ratings given to electric motors are related to the motors power
A. Input
B. output
C. Efficiency
D. Factor

A

Input

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45
Q

PVC conduit, fittings and connectors range in size from 1⁄2 inch to:
A. 3 inches
B. 4 inches
C. 5 inches
D. 6 inches

A

6 inches

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46
Q

Which of these is pulled through a raceway to test for obstructions before a cable pull?

A. Swivel
B. Piston
C. Clevis
D. Mandrel

A

Mandrel

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47
Q

Which type of transformer core assembly offers low resistance to magnetic lines of force?
A. Nickel
B. Iron
C. Copper*
D. Aluminum

A

Iron

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48
Q

An electrician reporting to the work area notices that the temporary wiring has been damaged. What should the electrician do?
A. Ground the conductors to the side of the box to open the overcurrent device and repair.
B. Instruct a co-worker to de-energize the circuit and watch while repair are performed
C. immediately report it to the supervisors
D. Test for Voltage and, if energized, de- energize the circuit and perform repairs

A

Immediately report it to the supervisor

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49
Q

according to NEC Article 240.4(D) (5),12 AWG copper shall be protected against overcurrent by a device with a MAXIMUM ampacity of.
A.15 amps
B. 20amps
C. 25 amps
D. 30 amps

A

20amps

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50
Q

An assembly containing two or more insulated conductors and having an overall jacket is known as a:

A. raceway
B. Conduit
C. cable
D. write

A

Cable

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51
Q

To test the insulation resistance between the heating cable conductors and the metallic grounding use a;

A. ohmmeter
B. multimeter
C. megohmmeter
D. hot stick

A

Megohmmeter

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52
Q

What is the total resistance of a circuit that has aa 50- chm resistor, a 75- ohm resistor, and a 100- chm resistor in series?
A. 225 ohms
B. 175 ohms
C. 100 ohms
D 50 ohms

A

225 ohms

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53
Q

Time delay fuses are MOST commonly used in circuits subject to what type of current?
A. DC*
B. Surge (in rush)
C. Eddy (variable)
D. Low

A

Surge (in rush)

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54
Q

All parts of a metal cable tray MUST be bonded together and:
A. Covered
B. Isolated
C. Grounded
D. Metal- clad

A

Grounded

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55
Q

The frequency of a circuit is 15 cycles per 1⁄4 second: What is the Hertz (Hz) rating of the circuit?

A. 15
B. 30*
C. 60
d. 120

A

60

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56
Q

The neutral bus in a sub panel

A. is bonded
B. is isolated from the grounded bus
C. has its own ground rod
D. terminates bare and neutral wires

A

Is isolated from the grounded bush

57
Q

Which symbol represents the overload relay in the schematic diagram?
A. L1
B. L2
C. M
D.OL

A

OL

58
Q

THE transformer coils of the primary and secondary share NO electrical connection, but current flows through them due to:
A. DC inductions
B. AC Oscillation
C. DC symmetry*
D. Mutual induction

A

Mutual induction

59
Q

A NEMA type___ enclosure offers only protection against incidental contact
A. 1
B. 3
C. 3R*
D. 4X

A

1

60
Q

Which of the following category ratings would a meter need to have to take voltage readings at the service switchgear of an industrial facility?

A. CAT 1
B. CAT 11
C CAT 111
D. CAT 1V*

A

CAT 111

61
Q

The length of bare copper conductor in a ground ring MUST be buried no less than 2.5’ below grade and with a length of at LEAST:

A. 10 Ft
B 20Ft
C.25 Ft
D. 50 Ft

A

20 Ft

62
Q

What is the voltage on the high leg in the figure?
A. 120 volts
B. 208 volts
C. 240 volts
D. 480 volts

A

208 voltes

63
Q

Various MINIMUM requirements have been set forth pertaining to overcurrent devices by the
A. ASME
B. ANSI
C. NEC
D. NEMA

A

NEC

64
Q

What will be the center-to-center measurement for two 30 degree bends in an offset bend with a height of 18 inches?

A. 48 Inches
B. 36 inches*
C. 18 inches
D. 9 inches

A

36 inches

65
Q

A swivel joint connection is to be made in a cable tray installation. What Must be installed
A. A cable connection
B. A flexible bonding jumper
C. a romex connector
D. A flexible hose clamp

A

A flexible bonding jumper

66
Q

Which of the following is the classified location where combustible dust is always present? .
A. Class 1 Div1*
B. Class 11 Div 11
C. Class 11 Div 1
D. Class 111 Div 1

A

Class 11 Div 1

67
Q

What connector should be used to splice a 15 KV shielded cable
A. Sett screw
B. Split- bolt
C. Compression
D. Mechanical

A

Compression

68
Q

What contacts are closed in the RUN mode?
A. 1 & 2
B. 3 & 4
C. 1 & 3
D. 2 & 4

A

1 & 3

69
Q

The turns ratio of a 3 phase 13.8kV transformer is 115 to 1. What is the output voltage of the secondary
A. 120 volts
B. 208 volts
C. 240 volts
D. 480 VOLTS

A

120

70
Q

A reduction in capacitance of a capacitator- start motor results in reduce
A. speed
B. voltage
C. armature reaction
D. starting torque

A

Speed

71
Q

According to the NEC, where is the “C” phase system to be located ( viewing from the front) with respect to the A and switchboard?
A. Left
B. Center
C. Right
D. Top

A

Right

72
Q

Before using a multimeter to check voltage on a breaker you should:
A. verify the amperage
B. check the meter with a known power source
C. touch the leads together to zero out me..
D. test the meter with a resistor

A

Check the meter with a known power source

73
Q

Which of the following inscriptions on a circuit breaker indicates that the circuit breaker is designed for use on both copper and aluminum wire?

A. CO/ALR
B C/A
C. AL/ CU
D. CP/AU

A

AL/CU

74
Q

Materials made of copper or silver are considered
A. Conductor
B. Semi- conductors
c. insulators
D. semi- insulators

A

Semi- conductors

75
Q

An insulated type 600 volt crimp terminal for a 12-10 AWG is typically identified by which color code?
A. Black
B. Red
C. Blue
D. Yellow

A

Yellow

76
Q

What is the MINIMUM length pull box that can be placed in a 2 inch conduit run where the conductors will be pulled straight..
A. 14 inches
B. 16 Inches
C. 20 inches
D. 24 inches

A

16 inches

77
Q

The NEC allows copper busbars to carry 1000 amps per square inch, if a bus bar measures 1⁄4 inch X 2 inches how many amps is this bar allowed to carry
A. 2000
B.1000
C. 500
D. 100

A

500

78
Q

The outer covering on a liquid – tight flexible metal conduit is used for
A. insulation
B. Moisture seal
C. Conductor
D. identification purposes only

A

Moisture seal

79
Q

The wattage output of series resistance heating cables depends on the total circuit length and:
A. amperage
B. resistance
C. inductance
D. Voltage*

A

Resistance

80
Q

Percent slip of an induction motor refers to the
A. no load speed of the motor
B. ratio of synchronous speed to system
C. the necessity of slip to permit induction..
D. the ratio of synchronous speed to rotor speed to rotor speed of the motor

A

The ratio of synchronous speed to rotor speed to rotor speed of the motor

81
Q

A 10 inch offset at 30 degrees is being made what is the distance between center to center bends
A. 10 inches
B. 20 inches
C. 25 inches
D. 30 inches

A

20 inches

82
Q

What protects the wires from the sharp edges of the conduit is joined to the metal?
A. Washers
B. Locknuts
C. Blushing
D. Couplings

A

Complings

83
Q

Compounds made of porcelain and plastic are used as____
A. conductors
B. semi- conductors
C. insulators
D. Semi-insulators

A

Insulators

84
Q

The NEC requires conduit and fitting installed in hazardous locations to be wrench tight with MINIMUM of how many engaged threads?
A.3.5
B. 4
C. 4.5
D. 5

A

4

85
Q

What two purposes do measuring tape in conduit serve?
A. It can take the place of a fish tape and cable pulling rope
B. it can clean light dirt or water from the conduit during the measuring process and provide an accurate measurement* C. it can spread a uniform film of pulling compound inside the conduit and provide an accurate measure
D. It can provide a accurate measurement of the conduit run and can be used to pull the cable pulling rope into the conduit

A

It can spread a uniform film of pulling compound inside the conduit and provide an accurate measure

86
Q

IEC style contactor coils are marked with the labels of:
A. 13 & 14
B. 2 & 3
C. T1 & T2*
D. A1 & A2

A

A1 & A2

87
Q

What is the source voltage in a circuit that consumes 1200 watts at a current of 5 amps
A. 24 volts
B. 110 volts
C. 120 volts
D. 240 volts

A

240 voltes

88
Q

If a 90 degree stub to be bent is using 10 degree segments, how many bends are required?
A. 10
B. 9
C. 6
D. 5

A

9

89
Q

In hazardous locations where metal conduit is required , the conduit MUST be threaded with
A. left hand threads
B. standard threads
C. plastic threads
D. NPT threads

A

Standard threads

90
Q

A current transformer has a rating of 4000: 5 if 1000 amps load is on the primary, the secondary output would produce A. 5 amps
B. 2.5 Amps
C. 1.25 amps
D. 1 amp

A

1.25 amps

91
Q

For a given number of poles, What determines the speed of an AC motor?
A. current*
B. frequency
C. A. voltage
D. Frame size

A

Frequency

92
Q

Which type of conductor is approved for installation in a wet location?
A. TFN
B. TBS
C. THHW
D. THHN

A

THHW

93
Q

The conducting connection, wheather intentional or accidental between any of an electrical system is a:
A. Ground fault
B. Short circuit
C. Overload
D. Arc fault

A

Short circuit

94
Q

Which type of transformer has its windings connected in series?
A. A current transformer
B. A wye transformer
C. A star transformer
D. A delta transformer

A

A wye transformer

95
Q

When terminating the feeders to the main on switchgear, the feeders MUST be braced to withstand:
A. Improperly torqued connections
B. Magnetic forces due to fault currents
C. seismic forces
D. arc flash energy

A

Arc flash energy

96
Q

The device used to prevent moisture from accumulating in hazardous wet locations is called a:
A. seal off
B. drain seal
C. tee
D. elbow seal

A

Drain seal

97
Q

When climbing a ladder ALWAYS face the ladder and:
A. check for defects in a ladder after tying off
B. reach out to get to the work area
C. maintain three-point contact when climbing
D. only use the step if a ladder is not available

A

Maintain three points of contact when climbing

98
Q

What type of bend is used to change conduit elevation to clear an obstruction and then return to the original eleva
A. Saddle
B. Offset
C. Degree
D. Back-to-back

A

Saddle

99
Q

With a circuit of a lagging power factor of 0.5 what should be done?
A. Add an inductor to increase the power factor
B. Add an inductor to decrease the power factor
C. Add a capacitator to increase the power factor
D. Add a capacitator to decrease the power factor

A

Add a capacitor or to increase the power factor

100
Q

Which contact(s) are open when the switch is in the START mode?
A. 1&2
B. 2
C. 1&4
D. 2&4

A

1 &2

101
Q

The name for the tester used to verify phase sequence is known as:
A. Voltmeter
B. Anmeter
C. Phase angle tester
D. Phase rotation meter

A

Phase rotation meter

102
Q

The term “ladder tray” refers to a tray that:
A. Can be used to climb on as wee as carry cables
B. Is installed vertically
C. Consist of two channels connected by rungs
D. Is installed horizontally

A

Consist of two channels connected by rungs

103
Q

When using a power cable puller, the rope attached to the cable is wrapped around a drum called a
A. Captain
B. Capstan
C. Rotor
D. Swivel

A

Capstan

104
Q

Which type of raceway is NOT suitable to service where exposed to severe damage?
A. Galvanized metal
B. Aluminum
C. Electrical metallic tubing
D. Intermediate metal

A

Electrical metallic tubing

105
Q

When Verifying that a circuit has been de-energized ensure FIRST that :
A. Its locked out and tagged out
B. The test instruments is operational
C. The power source is functioning
D. The capacitor is energized

A

It’s locked out and tagged out

106
Q

A conduit piston (mouse) is used for what application?
A. Cleaning the conduit
B. Swabbing the conduit
C. Installing pull line
D. Installing conductors

A

Cleaning the conduit

107
Q

Damaged tools or extension cord should be____.
A. Used only in dry places
B. Used only with GFCI
C. Tagged “Do Not Use “ at the end of the shift
D. Removed immediately from use a tagged “ Do Not Use”

A

Removed immediately from use a tagged “Do Not Use”

108
Q

The standard time rating for a continuous duty rated electric motor is:
A. 1 hour
B. 3 hours
C. 12 hours
D. 24 hours

A

3 hours

109
Q

What type of NEMA class enclosure is approved for general purpose indoor use and is NOT dust-tight or drip-poof?
A. Type 1
B. Type 3R
C. Type 7
D. Type 9

A

Type 1

110
Q

Wire connectors labeled with only the wire size should ONLY be used with what type of conductors?
A. Solid
B. Aluminum
C. Copper
D. Bronze

A

Copper

111
Q

What instrument is used to perform an insulation-resistance test on 480-volt feeder conductors?
A. Potentiometer
B. Megohmmeter
C. Phase meter
D. Voltmeter

A

Megohmmeter

112
Q

The number of wraps on a capstan indicates:
A. How many operators are needed
B. The amount of force applied by the operator
C. The amount of force applied to the pull
D. How many wraps a pulling drum can hold.

A

The amount of force applied to the pull

113
Q

What type of conduit can be safely used in a corrosive environment?
A. Plastic coated RMC Galvanized steel
B. Galvanized steel
C. Black iron steel
D. Copper alloy

A

Plastic coated RMC Galvanized steel

114
Q

An electrical room involving combustible dust would have explosive mixtures develop if the dust collection system failed. What would be the hazardous classification for this room
A. Class 1, Div 2
B. Class 2, Div 1
C. Class 2, Div 2
D. Class 3, Div 2

A

Class 2, Div 1

115
Q

Indoor switchgear MUST be stored in a location that protects it from
A. Moisture
B. Losing its UL listing
C. Sunlight
D. Loss of the nameplates

A

Moisture

116
Q

The voltage rating for class 0 rubber protective equipment is:
A. Under 600 volts
B. Between 600 and 1,000
C. Between 1,001 and 10,000
D. More than 10,000 volts

A

Between 600 and 1,000

117
Q

What is the purpose of a Lockout / Tagout System?
A. Keeping people out of high-voltage areas
B. Keeping supervisors advised of a job status
C. To prevent unauthorized access to dangerous areas
D. To prevent unexpected energizing of equipment or systems

A

To prevent unexpected energizing of equipment or system

118
Q

Relays, solenoids, and transformers are examples of component devices that rely on:
A. Capacitance
B. Magnetism
C. Coulombs
D. Joules

A

Magnetism

119
Q
  1. A drawing that shows the height of an object, but NOT the depth is a (n):
    A. Architectural drawing
    B. Elevation drawing
    C. Electrical drawing
    D. Sectional drawing
A

Elevation drawing

120
Q
  1. Electrical lockout/tagout procedures are designed to keep:
    A. People out of high-voltage transformer areas
    B. Supervisors advised of job status
    C. Pipes from shifting during transportation
    D. A system from being accidentally energized
A

A system from being accidentally energized

121
Q

How should an ammeter be connected?
A. Parallel with a circuit
B. Tandem with a circuit
C. In series with a circuit
D. Perpendicular with a circuit

A

Parallel with a circuit

122
Q

To size a pull box for a straight pull, the MINIMUM distance to the opposite wall is how many times the trade size of the largest raceway?
A. 8
B. 6
C. 4
D. 10

A

4

123
Q

What is the dimension of the generator load conduit entry area if we plan for bottom entry?
A. 5.91” x 13.78”
B. 3.94” x 19.69”
C. 100” x 500”
D. 90” x 500”

A

5.91” x 13.78”

124
Q

What is used to make a slight change in elevation in a cable tray system?
A. Swivel plates
B. All-thread rods
C. Beam clamps
D. Horizontal splice plates

A

Swivel plates

125
Q

What is Voltage?
A. Number of cycles of AC current completed in 1 second
B. Rate of flow of an electric current
C. Electromotive force
D. Resistance of the circuit

A

Electromotive force

126
Q

All of the following are CORRECT formulas for Ohm’s Law EXCEPT:
A. I=E/R
B. E=IXR
C. R=E/I
D. D.E=PXI

A

D.E=PXI

127
Q

A “live-dead live” test is used to:
A. Check motor rotation
B. Perform insulation resistance test
C. Verify a circuit is de-energized
D. Trouble shoot lighting controls

A

Verify a circuit is de-energized

128
Q

In an AC circuit the total opposition to the flow of current is termed
A. Impedance
B. Reactance
C. Capacitance
D. Inductance

A

Impedance

129
Q

When installing more than one ground rod, what is the MINIMUM spacing between rods?
A. 10 ft
B. 8ft
C. 6ft
D. 4ft

A

6ft

130
Q

The potential across the circuit is 480 volts and the current is 50 amps. What is the resistance of the circuit?
A. 4.8 ohms
B. 9.6 ohms
C. 48.0 ohms
D. 96.0 ohms

A

9.6 ohms

131
Q

All of the following are acceptable grounding electrodes for a service grounding electrode system EXCEPT:
A. An underground metal water pipe with at least 10ft in direct contact with earth
B. A metal in-ground support structure
C. An underground metal gas pipe with at least 10 ft in direct contact with earth
D. 1⁄2 -inch rebar 20 feet long encased in concrete in the bottom of a footing

A

1/2- inch rebar 20 feet long encased in concrete in the bottom of a footing

132
Q

A conduit piston (mouse) is used for what application?
A. Cleaning the conduit.
B. Swabbing the conduit
C. Installing pull line
D. Installing conductors

A

Installing pull line

133
Q

Rubber personnel protective insulating equipment MUST be marked with the appropriate voltage rating and:
A. Current rating
B. Expiration date
C. Load rating
D. Last test date

A

Current rating

134
Q

Which of the following is the classified location where combustible fibers may be present?
A. Class 111, Div 11
B. Class 11, Div 11
C. Class 11, Div 1
D. Class 111, Div 1

A

Class 111, Div 1

135
Q

Several #2 AWG conductors are pulled together. How should they be arranged on the fish tape?
A. Side by Side
B. Staggered
C. Criss-cross
D. Overlapped

A

Staggered

136
Q

The ratio of power in watts to the total volt-amps of an AC circuit is known as the:
A. Balance factor
B. Power factor
C. Diversity factor
D. Correction factor

A

Power factor

137
Q

. A circuit with a source of 120 volts is connected across four parallel 60 ohms resistors. The current through each resistor is:
A. 30 amps
B. 8 amps
C. 5 amps
D. 2 amps

A

2 amps

138
Q

What is a dropout plate?
A. Metal plate that failed UL listings during a test
B. Metal plate with a curved surface to protect the cable as it enters or exits the tray
C. Device used to pull cable around a corner
D. Replacement assembly for broken tray rungs

A

Metal plate with a curved surface to protect the cable as it enters or exits the tray

139
Q
  1. A drill motor breaks down during an installation. What should be done?
    A. Put the drill back in the toolbox and get another drill to complete the work
    B. Put the drill back in the toolbox and tell the supervisor about it.
    C. Throw out the drill
    D. Tag the drill and give it to the supervisor
A

Tag the drill and give it to a supervisor

Electrician (2 decks)

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