Exam (elaborations)
THE ELECTRICAL NCCER TEST (Electrical Study Guide) QUESTIONS WITH 100% CORRECT ANSWERS.
- Course
- Institution
THE ELECTRICAL NCCER TEST (Electrical Study Guide) QUESTIONS WITH 100% CORRECT ANSWERS.
[Show more]
1 review
By: elmerp58840 • 2 months ago
Content preview
THE ELECTRICAL NCCER TEST (Electrical Study Guide ) QUESTIONS WITH 100% CORRECT 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
A 120/208 volt feeder consists of an 800 ft run of 500 kcmil aluminum wire in conduit.
This feeder has 5% voltage drop. What will the phase-to-phase voltage be at the load end? Answer- 197.60 volts
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 EvaTee. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
