EXAM : INDUSTRIAL ELECTRICIAN V5 (NCCER EXAM)

The PEAK voltage in a normal 120/208 VAC system is:

170 V.

What is a fish tape used for?

Pulling wire or rope through conduit

As the ambient temperature surrounding a self-regulating heating cable gets warmer, the

Increases.

Rubber personnel protective insulating equipment must be marked with the appropriate voltage rating and

Expiration date.

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

Site

THWN conductors have an outer jacket made of:

Nylon

Which of the following is the classified location where combustible vapors are always present?

Class I Div I

When installing more than one ground rod, what is the MINIMUM spacing between rods

10 ft.

The length of bare copper conductor in a ground ring MUST be buried no less than 2.5' below grade and

10 ft.

What is the purpose of sealing cable ends that are in storage?

To keep moisture from entering in.

What is the multiplier from calculating a 45-degree offset when conduit is being bent?

1.414

Where raceways connect an enclosure required to be dust/ ignition proof to an enclosure in an UNCLASSIFIED location

Not required.

Which typed of rigid metal conduit would be most appropriate for a corrosive environment?

Stainless steel

A material with poor electrical conducting properties is a good

Insulator

Insulation on the barrel of crimp connectors for wires sized 22-16 AWG are typically colored.

Red

A protective device for limiting voltage spikes by discharging or bypassing surge current is called a

Surge protector.

A Type LB conduit body has the cover on

The back.

All of the following are common service voltage in the United States EXCEPT

372/575 three-phase, four-wire.

Why should the test leads of a "megger" NEVER be touched by anyone when in use?

It could result in an electrical shock.

What is the purpose of lockout/ tagout?

Prevent operation.

With a row of 3-4" conduits and second row of 3-2" and 2-1" conduits for a angle pull box what is the MINIMUM distance between the pull box?

32"

How should heat-shrink insulators be installed?

The insulator should be slipped over the connector and heat should be applied for a few seconds

A megohmmeter will be used to check a cable. The electrician MUST be sure that the circuit is

De-energized and locked, tagged out, and tested.

In a typical 3 wire start/stop station, where will the incoming control voltage wire be terminated?

Stop button normally closed

Exposed field-routed electrical conduit SHOULD be installed so that it

Is plumb and level.

Which electrical values CANNOT be tested using a VOM(multimeter)?

Watts

Who is allowed to remove another electricians tag or lock from any valve, switch, or piece of equipment without proper authorization?

No one.

What is the PRIMARY consideration in selecting the rope for a cable pull?

Low stretch

A 1500 KVA three phase transformer has a secondary voltage of 480/277. What is the secondary full load amperage?

5.42

What is the MINIMUM distance between raceway entries allowed in a pull box for angle pills?

6x the largest trade size raceway

True power is measured in:

Watts

The strand unit for measuring the cross sectional area of wire is the

Circular mil.

Applications for heat tracing system with self regulating control include those requiring a narrow operating range and

Constant heat output

The most common transformer found on an industrial site is

Single phase step down

What is the approximant total current of a circuit with a voltage of 100 volts across five resistors in parallel (10, 15, 20, 25, and 100 ohms)?

0.6 amps

In a guardrail system, the guardrails can be made of any of the following EXCEPT

Ropebanding

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

10.5

What is Type USE cable PRIMARILY used for?

Direct burial in the earth

What is the formula for calculating total resistance in a series circuit with three resistors?

RT= R1+R2+R3

When terminating fire alarm, instrumentation, or control cables that contain a shielding drain wire, this drain wire must be

Grounded

What is the approximate developed length if a 40" radius 90" bends? (DL= 1.57xRadius)

63''

With a row of 3-4" conduit and second row of 3-2" and 1-1" conduit on each side for a straight pull box what is the MINI opposite walls of the pull box?

32"

When re-setting a circuit breaker, where should the worker stand?

On the handle side

When installing heating cables for anti-icing systems, cable pattern should be in a

Serpentine

The type of support that would be used to eliminate the need to offset the conduit where there is a fitting is a

Standoff support

What is a basic multimeter capable of measuring?

Current, voltage, and resistance

When stepping down voltage from 480 to 120/208 Y, the XO terminal of the transformer MUST be

Grounded and bonded

An auxiliary holding contact (seal-in) on a NEMA starter is indicated by the terminal marking

A1 & A2

Which one of the fuses is a standard size according to the NEC?

5

If the potential across the circuit is 48 volts and the current is 5 amps the resistance of the circuit is

9.6 ohms

In a circuit of pure capacitance, the current leads the voltage by an angle of

90-degrees

The MAIN purpose of a revision block on an electrical drawing is to

Note any changes to the original drawings

Which of the following conductors has the LEAST resistance?

1/0 AWG

The drawing scale is MOST likely to be found in which of the following drawings locations?

The drawing title block

When wiring a 3-wire control push button control circuit, the auxiliary holding contact (seal-in) wired with the start button in

Series

What is the MINIMUM number of overload sensing units required for all three phase motors?

3

To build an offset in a cable tray system, use four

Swivel plates

A current transformer has a rating of 4000:5. If 2000 amps load is on the primary, the secondary output would produce

2.5 amps

Why should the proper rope be selected for a cable pull?

To maximize safety

Which of the following heat trace cable may not be cut to length during installation in the field?

Mineral insulated cables

A voltage source of a circuit provides 240 volts and draws 48 amps. How much resistance is in the circuit?

5 ohms

Electrical gloves should be inspected before each use to determine

If they have pinholes

What is shown on a sectional drawing?

Cutaway view of a building

Eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a 200-watt lamp. What is the total connected load?

13.3 amps

An insulation resistance tester is also known as a(n)

Megohmeter

Which of the following is the classified location where combustible dust may be present?

Class I Div I

Any person who works in an electrical environment should NEVER wear jewelry or clothing made of

Polyester

On a push button, normally closed contacts are generally used to open a circuit to

Initiate a start or on circuit function

As the load decreases on a squirrel cage induction motor, its power factor

Decreases

Which type of conductors has the highest temperature rating?

THHW

Electrical hand tool that use a regular 120-volt system MUST be 3-wire grounded UNLESS the

Tool is double-insulated and is approved by an independent testing facility

The meter used to measure pulling tension is known as a

Dynamometer

What is insulating tape?

Nonconductive adhesive tape

An electrician that attempts to install or remove energized fuses will be exposed to the risk of an electrical shock and an electrical

Arc

The conducting object through which a direct connection to earth is established is called a grounding

Electrode

What is the resultant distance between center bends for a 10-inch offset at 15 degrees?

38.7 inches

When installing 4/0 and larger cables in a cable tray, the tray width must NOT be less than the sum of the cable

Cross-sectional areas

How does a battery produce voltage?

Chemical reaction

What is the symbol for the SECONDARY side of a transformer?

H

The conductor used to connect the system grounded conductor or the equipment to a grounded electrode or to a point on the grounding system is called a grounding

Electrode conductor

The material between the capacitor plates in which an electric field appears is the

Dielectric

What size wire is needed for a 120v circuit 215 feet long one way with a load of 39 amps?

#8Terminates bare and neutral wires

The neutral bus in a sub panel

Terminates bare and neutral wires

A 1000 KVA three phase transformer has a secondary voltage of 206/120. What is the secondary full load amperage?

8.33

A UL listed rod type grounding electrode must have a MINIMUM length of

10'

When installing cables smaller than 4/0 in a cable tray, the allowable cable fill are must NOT be less than the sum of the cable

Cross-sectional areas

As the mechanical load increases on a squirrel cage induction motor

Torque increases and stator current increases

Which of the following is the classified location where combustible fibers are always present?

Class I Div I

A lighting outlet symbol in the shape of a circle indicates a

Incandescent fixture

A conductor with 220 mils of insulation would have insulation thickness of

0.22"

How should power cable and signal cable be placed in the same cable tray?

Place a divider between the signal cables and the power cable

Which of the following factors is used to control the speed of an induction motor?

Frequency

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

Split-bolt

Which contracts are closed in the RUN mode?

1&3

Which contact(s) open when the switch is in the RUN condition?

2&4

What is the voltage on the high leg in the figure?

240 volts

Refer to the Table 450 3(B). If a transformer primary has a full load current of 54 amps, with primary protection and secondary protection, what is the MAXIMUM setting of the primary overcurrent protection?

125

Refer to Table 450 3(B). If a transformer primary has a full load current of 54 amps with primary protection only, what is the MAXIMUM setting of the overcurrent protection?

75

The pulling pictured is used for pulling wire around a corner and

No other purpose