Exam (elaborations)
The Electrical NCCER test Exam Questions with Correct Answers.
- Course
- Institution
The Electrical NCCER test Exam Questions with Correct Answers.The Electrical NCCER test Exam Questions with Correct Answers.
[Show more]
Content preview
The Electrical NCCER test Exam Questions with CorrectAnswers.
Which Article of the NEC covers grounding? - Correct Answer article 250
Which of the following is a 90 degree, explosion proof fitting? - Correct Answer GUAL
What is a dropout plate? - Correct 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: -
Correct Answer 372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - Correct Answer opens a circuit to prevent operation of
an electrical device
What will happen when one or more coils in a winding are grounded? - Correct 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? - Correct Answer 13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. -
Correct Answer Neutral bulbar
When wall mounting cable tray, ensure that - Correct 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 - Correct
Answer to keep moisture from creeping in
The outer covering on liquid-tight flexible metal conduit is used for - Correct Answer a
moisture seal
A good electrical connection should - Correct Answer Be mechanically and electrically
secure
The symbol normally used for duplex - Correct Answer Circle with two parallel lines
draw through it
Disconnecting means are covered in - Correct Answer NEC Section 110-22
In relation to switches, the term throw refers to the - Correct Answer Number of internal
operations that a switch can perform
,A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - Correct
Answer 3
Services conductors and equipment are covered in - Correct Answer NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits
be ______ receptacles - Correct Answer Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ -
Correct Answer Step-down turns ratio of 4:3
The circular mil is based on the - Correct Answer Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - Correct Answer Class 1
Unless otherwise noted. The calculations in AC circuits _____ values. - Correct Answer
Rams
When the coil turns are increased the _____ - Correct Answer Induced voltage is
increased
As the temperature surrounding a self-regulating heating cable rises, the ____ - Correct
Answer Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - Correct Answer
Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. - Correct
Answer Frequency
Both induction and synchronous motors operate on the principle of a rotating ____ field
- Correct 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: - Correct Answer 90Volts
The output capacity of a motor is rated in - Correct Answer Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
Correct Answer 1,800
The sine of 0 degree is - Correct Answer 0
Meters used in AC circuits indicate the - Correct Answer Effective
, The component labeled 7 in figure 1 is a(n) - Correct Answer End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10 ohms
and the voltage is 120V. - Correct Answer 12A
The _____ rotor types are generally rugged. - Correct Answer Squirrel cage
Proofs tests are made at_ of the original factory voltage. - Correct Answer 60%
Which type of heating cable cannot be cut and terminated in the field? - Correct Answer
Mineral insulated
The secondary of a CT under load should not be opened because of_. - Correct Answer
Induced high voltage
In a transformer ______ - Correct Answer Electromagnetic Induction Ocurs
When a ground rod is installed, the top of the rod must be positioned ______ grade. -
Correct Answer Flush with or below
When making offset bends, the two kicks must be made perfectly parallel or the
resulting offset will have a _____ - Correct 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 _____ - Correct 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 _____ - Correct Answer Undervoltage
conditions
What is the MOST common service used in a temporary power panel? - Correct Answer
120/240 volt, 1-phase, 3-wire
What are the 2 MOST common types of overcurrent protective devices? - Correct
Answer Circuit breakers and fuses
What instrument is used to perform an insulation-resistance test on a 480- volt motor
winding? - Correct Answer Megohmmeter
Why is a seal installed in a run of conduit in a Class I location? - Correct Answer
Prevent the passage of explosive gases in the conduit
Which of the following is the correct formula for OHM's law? - Correct Answer I=E/R
Which of the following testing instruments operated on the current transformer
principle? - Correct Answer Clamp-on ammeter
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Lectjoe. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $22.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76799 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now