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The electrical NCCER test Questions with correct Answers 2024 $21.49   Add to cart

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The electrical NCCER test Questions with correct Answers 2024

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The electrical NCCER test

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  • April 13, 2024
  • 18
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
  • NCCER
  • NCCER
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The electrical NCCER test



Which Article of the NEC covers grounding? - answer article 250

Which of the following is a 90-degree, explosion proof fitting? - answer GUAL

What is a dropout plate? - answer Metal plate with a curved surface for cable to
follow as it passes from the tray

All of the following are common service voltages in the United States EXCEPT: -
answer 372/575 3-PHASE, 4-WIRE

What does a GFCI breaker do? - answer Opens a circuit to prevent operation of an
electrical device

What will happen when one or more coils in a winding are grounded? - answer The
motor will automatically blow fuses

Eight incandescent lighting fixtures are to be installed. Each fixture is 120- volts, with a
200-watt lamp. What is the total connected load? - answer 13.3 amps

The must be grounded in a bussed gutter if used as the main service equipment. -
answer Neutral busbar

When wall mounting cable tray, ensure that - answer The building structure is strong
enough to support the tray system

The purpose of sealing cable ends when reels of cable are in storage is - answer To
keep moisture from creeping in

The outer covering on liguid-tight flexible metal conduit is used for - answer A
moisture seal

A good electrical connection should - answer Be mechanically and electrically secure

The symbol normally used for duplex - answer Circle with two parallel lines drawb
through it

Disconnecting means are covered in - answer NEC Section 110-22

,In relation to switches, the term throw refers to the - answer Number of internal
operations that a switch can perform

A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - answer 3

Services conductors and equipment are covered in - answer NEC Article 230

The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits
be ______ receptacles - answer Grounding

A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ -
answer Step-down turns ratio of 4:3

The circular mil is based on the - answer Cross-sectional area of the wire

Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - answer Class 1

Unless otherwise noted. the calculations in AC circuits _____ values. - answer Rms

When the coil turns are increased the _____ - answer Induced voltage is increased

As the temperature surrounding a self-regulating heating cable rises, the ____ - answer
Resistance of the polymeric core increases

The motor type that has the highest starting torque is the ____ motor. - answer
Capacitor-start

For a given number of poles, the ____ determines the speed of an AC motor. - answer
Frequency

Both induction and synchronous motors operate on the principle of a rotating ____ field
- answer Magnetic

A transformer has 200 turns in the primary, 150 turns in the secondary, and 120VAC
applied to the primary. The voltage across the secondary is: - answer 90Volts

The output capacity of a motor is rated in - answer Horsepower

The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
answer 1,800

The sine of 0 degree is - answer 0

Meters used in AC circuits indicate the - answer Effective

, The component labeled 7 in figure 1 is a(n) - answer End seal

In an AC circuit containing resistance only _____ will flow if the resistance is 10 ohms
and the voltage is 120V. - answer 12A

The _____ rotor types are generally rugged. - answer Squirrel cage

Proofs tests are made at_ of the original factory voltage. - answer 60%

Which type of heating cable cannot be cut and terminated in the field? - answer
Mineral insulated

The secondary of a CT under load should not be opened because of_. - answer
Induced high voltage

In a transformer ______ - answer Electromagnetic Induction Ocurs

When a ground rod is installed, the top of the rod must be positioned ______ grade. -
answer Flush with or below

When making offset bends, the two kicks must be made perfectly parallel or the
resulting offset will have a _____ - answer Crooked Bend

conduit that requires a 90 degree change in direction, except 42.All of the following
types of condulet may be used as a pulling point for _____ - answer C

To be effective, a grounding system must limit the voltage on the electrical system and
protect it from all of the following, except _____ - answer Undervoltage conditions

What is the MOST common service used in a temporary power panel? - answer
120/240 volt, 1-phase, 3-wire

What are the 2 MOST common types of overcurrent protective devices? - answer
Circuit breakers and fuses

What instrument is used to perform an insulation-resistance test on a 480- volt motor
winding? - answer Megohmmeter

Why is a seal installed in a run of conduit in a Class I location? - answer Prevent the
passage of explosive gases in the conduit

Which of the following is the correct formula for OHM's law? - answer I=E/R

Which of the following testing instruments operated on the current transformer
principle? - answer Clamp-on ammeter

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