Exam (elaborations)
THE ELECTRICAL NCCER TEST REVIEW QUESTIONS WITH COMPLETE ANSWERS
- Course
- Institution
THE ELECTRICAL NCCER TEST REVIEW QUESTIONS WITH COMPLETE ANSWERS
[Show more]
Content preview
THE ELECTRICAL NCCER TEST REVIEWQUESTIONS WITH COMPLETE
ANSWERS
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
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 biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now