Practice Quiz 1 - Nec Exam
This is a quiz over the Texas Residential Appliance Installers License.
- 1.
The NEC is_______.
- A.
Intended to be a design manual
- B.
Meant to be used as an instruction guide for untrained persons
- C.
For the practical safeguarding of persons and property
- D.
Published by the Bureau of Standards
Correct Answer
C. For the practical safeguarding of persons and propertyExplanation
Section 90.1 ARate this question:
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- 2.
If the NEC requires new products that are not yet available at the time a new edition is adopted, the ______ may permit the use of the products that comply with the previous edition of the Code adopted by that jurisdiction.
- A.
Electrical engineer
- B.
Master electrician
- C.
Authority having jurisdiction
- D.
Permit holder
Correct Answer
C. Authority having jurisdictionExplanation
Section 90.4Rate this question:
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- 3.
The NEC requires that electrical work be _______ .
- A.
Installed in a neat and workmanlike manner
- B.
Installed under the supervision of a licensed person
- C.
Completed before being inspected
- D.
All of these
Correct Answer
A. Installed in a neat and workmanlike mannerExplanation
Section 110.12Rate this question:
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- 4.
Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so _______.
- A.
That it can be locked out and tagged
- B.
It is not readily accessible
- C.
The purpose is evident
- D.
That it operates at less than 300 volts-to-ground
Correct Answer
C. The purpose is evidentExplanation
Each disconnecting means must be clearly labeled to indicate its purpose, unless it is located and arranged in a way that makes the purpose obvious. This means that if the disconnecting means is easily identifiable without any additional labeling, it does not need to be marked.Rate this question:
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- 5.
A minimum working space depth of _____ to live parts operating at 277 volts-to-ground is required where there are exposed live parts on one side and no live or grounded parts on the other side.
- A.
2 ft
- B.
3 ft
- C.
4 ft
- D.
6 ft
Correct Answer
B. 3 ftExplanation
110.26 (A)(1) and Table 110.26 (A)(1) Condition 1Rate this question:
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- 6.
Concrete, brick, or tile walls are considered _____, as applied to working space requirements.
- A.
Inconsequential
- B.
In the way
- C.
Grounded
- D.
None of these
Correct Answer
C. GroundedExplanation
Section 110.26(A)(1) Table 110.26(A)(1) Condition 2Rate this question:
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- 7.
The required working space for access to live parts operating at 300 volts-to-ground, where there are exposed live parts on both sides of the workspace is _____ .
- A.
3 ft
- B.
3 1/2 ft
- C.
4 ft
- D.
4 1/2 ft
Correct Answer
C. 4 ftExplanation
The required working space for access to live parts operating at 300 volts-to-ground, where there are exposed live parts on both sides of the workspace, is 4 ft. This distance is necessary to ensure the safety of workers and prevent accidental contact with live parts. It allows for enough space to maneuver and work safely without the risk of electrical shock or injury.Rate this question:
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- 8.
The minimum height of working spaces about electrical equipment, switchboards, panelboards, or motor control centers operating at 600V, nominal, or less and likely to require examination, adjustment, servicing, or maintenance while energized shall be 6 1/2 ft or the height of the equipment, whichever is greater, except for service equipment or panelboards in existing dwelling units that do not exceed 200A.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because according to the given information, the minimum height of working spaces for electrical equipment is 6 1/2 ft or the height of the equipment, whichever is greater. This requirement applies to equipment operating at 600V or less and is likely to require examination, adjustment, servicing, or maintenance while energized. However, there is an exception for service equipment or panelboards in existing dwelling units that do not exceed 200A.Rate this question:
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- 9.
When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably_____ .
- A.
Accessible
- B.
Guarded
- C.
Open
- D.
Enclosed
Correct Answer
B. GuardedExplanation
Section 110.26(B)Rate this question:
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- 10.
For equipment rated 1,200A or more that contains overcurrent devices, switching devices, or control devices; and where the entrance to the working space has a personnel door less than 25 ft from the working space, the door shall _____ .
- A.
Open either in or out with simple pressure and shall not have any lock
- B.
Open in the direction of egress and be quipped with panic hardware or other devices so the door can open under simple pressure
- C.
Be equipped with a locking means
- D.
Be equipped with an electronic opener
Correct Answer
B. Open in the direction of egress and be quipped with panic hardware or other devices so the door can open under simple pressureExplanation
Section 110.26(C)(3)Rate this question:
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- 11.
Grounded conductors _____ and larger can be identified by distinctive white and gray markings at their terminations.
- A.
10 AWG
- B.
8 AWG
- C.
6 AWG
- D.
4 AWG
Correct Answer
D. 4 AWGExplanation
Section 200.6(B)(4)Rate this question:
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- 12.
If neutral conductors of different voltage systems are installed in the same raceway, cable, or enclosure, the means of idenification of the different neutrals shall be documented in a manner that's _____ or be permanently posted where the conductors or fiffernet systems originate.
- A.
Available to the AHJ
- B.
Available through the engineer
- C.
Readily available
- D.
Included in the as-built drawings
Correct Answer
C. Readily availableExplanation
Section 200.6 D (3)ExRate this question:
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- 13.
If used for single-pole, 3-way or 4-way switch loops, the reidentified conductor with white or gray insulation or three continuous white stripes can be used for the supply to the switch, but not as a return conductor from the switch to the outlet.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Section 200.7(C)(1)Rate this question:
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- 14.
Receptacles shall have the terminal intended for connection to the grounded conductor identified by a metal or metal coating that is substantially _____ in color.
- A.
Green
- B.
White
- C.
Gray
- D.
B or c
Correct Answer
B. WhiteExplanation
Section 200.10 B1Rate this question:
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- 15.
Multiwire branch circuits shall
- A.
Supply only line-to-neutral loads
- B.
Not be permitted in dwelling units
- C.
Have their conductors originate from different panelboards
- D.
None of these
Correct Answer
A. Supply only line-to-neutral loadsExplanation
Section 210.4(C)Rate this question:
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- 16.
The NEC defines a "_____" as all circuit conductors between the service equipment, the source of a separately derived system, or other power-supply source and the final branch-circuit overcurrent device.
- A.
Service
- B.
Feeder
- C.
Branch circuit
- D.
All of these
Correct Answer
B. FeederExplanation
Definitions 100Rate this question:
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- 17.
The rating of a branch circuit shall be determined by the rating of the _____ .
- A.
Ampacity of the largest device connected to the circuit
- B.
Average of the ampacity of all devices
- C.
Branch-circuit overcurent device
- D.
Ampacity of the branch-circuit conductors according to Table 310.15(B)(16)
Correct Answer
C. Branch-circuit overcurent deviceExplanation
Section 210.3Rate this question:
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- 18.
A circuit breaker is a device designed to _____ the circuit automatically on a predetermine overcurrent without damage to itself when properly applied within its rating.
- A.
Energize
- B.
Reset
- C.
Connect
- D.
Open
Correct Answer
D. OpenExplanation
Definition 100Rate this question:
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- 19.
"Bonded" can be described as _____ to establish electrical continuity and conductivity.
- A.
Isolated
- B.
Guarded
- C.
Connected
- D.
Separated
Correct Answer
C. ConnectedExplanation
Definition 100Rate this question:
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- 20.
If dwelling units, the voltage between conductors that supply the terminals of _____ shall not exceed 120V, nominal.
- A.
Luminairs
- B.
Cord-and-plug-connected loads of 1,440 VA or less
- C.
Cord-and-plug-connected loads of more than 1/4 hp
- D.
A and b
Correct Answer
D. A and bExplanation
Section 210.6 (A)(1) and (2)Rate this question:
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- 21.
The connection between the grounded conductor and the equipment grounding conductor at the service is accomplished by installing a(n) _____ bonding jumber.
- A.
Main
- B.
System
- C.
Equipment
- D.
Circuit
Correct Answer
A. MainExplanation
Definitions 100Rate this question:
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- 22.
In other than dwelling locations, GFCI protection is required in _____ .
- A.
Indoor wet locations
- B.
Locker rooms adjacent to showering facilities
- C.
Garages, service bays, and similar areas
- D.
All of these
Correct Answer
D. All of theseExplanation
section 210.8(B)(6),(7), and (8)Rate this question:
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- 23.
Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all _____ conductors at the point where the branch circuit originates.
- A.
Circuit
- B.
Grounded
- C.
Grounding
- D.
Ungrounded
Correct Answer
D. UngroundedExplanation
section 210.4(B)Rate this question:
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- 24.
GFCI protection shall be provided for all 15A and 20A, 125V receptacles installed in a dwelling _____ .
- A.
Attic
- B.
Garage
- C.
Laundry room
- D.
All of these
Correct Answer
B. GarageExplanation
section 210.8(A)(2)Rate this question:
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