1.
The NEC is_______.
Correct Answer
C. For the practical safeguarding of persons and property
Explanation
Section 90.1 A
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.
Correct Answer
C. Authority having jurisdiction
Explanation
Section 90.4
3.
The NEC requires that electrical work be _______ .
Correct Answer
A. Installed in a neat and workmanlike manner
Explanation
Section 110.12
4.
Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so _______.
Correct Answer
C. The purpose is evident
Explanation
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.
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.
Correct Answer
B. 3 ft
Explanation
110.26 (A)(1) and Table 110.26 (A)(1) Condition 1
6.
Concrete, brick, or tile walls are considered _____, as applied to working space requirements.
Correct Answer
C. Grounded
Explanation
Section 110.26(A)(1) Table 110.26(A)(1) Condition 2
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 _____ .
Correct Answer
C. 4 ft
Explanation
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.
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.
Correct Answer
A. True
Explanation
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.
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_____ .
Correct Answer
B. Guarded
Explanation
Section 110.26(B)
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 _____ .
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 pressure
Explanation
Section 110.26(C)(3)
11.
Grounded conductors _____ and larger can be identified by distinctive white and gray markings at their terminations.
Correct Answer
D. 4 AWG
Explanation
Section 200.6(B)(4)
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.
Correct Answer
C. Readily available
Explanation
Section 200.6 D (3)Ex
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.
Correct Answer
A. True
Explanation
Section 200.7(C)(1)
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.
Correct Answer
B. White
Explanation
Section 200.10 B1
15.
Multiwire branch circuits shall
Correct Answer
A. Supply only line-to-neutral loads
Explanation
Section 210.4(C)
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.
Correct Answer
B. Feeder
Explanation
Definitions 100
17.
The rating of a branch circuit shall be determined by the rating of the _____ .
Correct Answer
C. Branch-circuit overcurent device
Explanation
Section 210.3
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.
Correct Answer
D. Open
Explanation
Definition 100
19.
"Bonded" can be described as _____ to establish electrical continuity and conductivity.
Correct Answer
C. Connected
Explanation
Definition 100
20.
If dwelling units, the voltage between conductors that supply the terminals of _____ shall not exceed 120V, nominal.
Correct Answer
D. A and b
Explanation
Section 210.6 (A)(1) and (2)
21.
The connection between the grounded conductor and the equipment grounding conductor at the service is accomplished by installing a(n) _____ bonding jumber.
Correct Answer
A. Main
Explanation
Definitions 100
22.
In other than dwelling locations, GFCI protection is required in _____ .
Correct Answer
D. All of these
Explanation
section 210.8(B)(6),(7), and (8)
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.
Correct Answer
D. Ungrounded
Explanation
section 210.4(B)
24.
GFCI protection shall be provided for all 15A and 20A, 125V receptacles installed in a dwelling _____ .
Correct Answer
B. Garage
Explanation
section 210.8(A)(2)