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Residential wiring final exam questions and answers
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Residential wiring final exam questions and answers
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Residential wiring final exam questionsand answers
The open circuit voltage between the two terminals of a single pole switch on a lighting
circuit when the switch is in the off position is... - Answer -120 volts
An arc flash can produce temperatures of ... Fahrenheit - Answer -35,000
Listing or labeling of electrical equipment is done by a ... - Answer -Recognized testing
laboratory
The purpose of electrical symbols on plans is... - Answer -To graphically represent
electrical products and systems
The NATIONAL ELECTRICAL CODE is a minimum ... standard. - Answer -Safety
The meaning of approved is... - Answer -Acceptable to the authority having jurisdiction
As defined in ARTICLE 100, a dwelling unit has the following features... - Answer -
Permanent provisions for living, sleeping, cooking, and sanitation
All measurements in the NATIONAL ELECTRICAL CODE are shown in which system of
units? - Answer -Both inch-pound and metric values
In the international system of units, the prefix KILO- means... - Answer -Thousand
In the international system of units the prefix MILLI- means... - Answer -One thousandth
NATIONALLY RECOGNIZED TESTING LABORATORIES (NRTL)... electrical products
to provide a basis for approval by inspectors in the field - Answer -Test and list
Devices are equipment whose primary function is to carry current, not ... - Answer -
Utilize electric energy
All of the following items of electrical equipment are devices, except for a ... - Answer -
Lamp
,The NEC requires that a ... be installed at each conductor splice connection point -
Answer -Box or conduit body
In order that the connections inside an outlet box remain accessible, the NEC requires
that a surface extension from an outlet box cover be made using ... - Answer -Flexible
conduit
Electrical wall boxes should not be mounted back-to-back in walls because ... - Answer
-Sound may be transmitted from room to room, it reduces the fire resistance of the wall,
and the practice violates building codes
According to ... , unused knockouts and other openings in electrical boxes and cabinets
are required to be closed - Answer -NEC 110.12(A) and NEC 408.7
Device faceplates must be mounted so as to ... - Answer -Cover the opening in the wall
and Seat against the wall surface
A receptacle outlet is ... - Answer -An outlet where one or more receptacles are installed
Where the noncombustible surface material is used on walls or ceilings, outlet boxes
must be mounted so that they will be set back no more than ... from the face of the
surface material - Answer -1/4 in. (6mm)
In construction of one- and two-family dwellings, the electrical circuits are usually
designed by the ... - Answer -Electrician
All of the following are included when calculating the usable area of a dwelling to
compute the required lighting load, except for ... - Answer -Crawl space
A 20-ampere requires ... AWG conductors, ignoring the effects of voltage drop - Answer
-12 copper
How is the track lighting load in residence calculated? - Answer -It is considered to be
part of the general lighting load of 3 volt-amperes per square foot
The 20-ampere appliance circuits required NEC are permitted to serve no other loads,
except for ... - Answer -Clock outlets and receptacles that are installed to plug in the
cords of gas-fired ranges, ovens, or counter-mounted cooking units
Where fixed glass panels (i.e., windows or non-sliding parts of a door) do not permit
installation of wall-mounted receptacles, ... are typically used to satisfy the receptacles
spacing requirements of the NEC - Answer -Floor-mounted receptacles
NEC Article 210 provides ... guidelines for locating receptacle outlets in residence -
Answer -Mandatory
, The "12 foot rule" for spacing receptacles applies to all the following areas of a house,
except for ... - Answer -Attics
Wall receptacles in a habitable room must be placed so they are no further than ... feet
from any point along the wall - Answer -6
Small appliance receptacle outlets ... included in the 3 volt-ampere per square foot load
calculation - Answer -Are not
The NATIONAL ELECTRICAL CODE requires receptacles installed in a garage to be ...
- Answer -GFCI protected
A continuous load shall not exceed ... of the rating of the branch circuit - Answer -80%
The minimum lighting load requirement for dwelling units is ... volt-amperes per square
ft (0.093m^3) - Answer -3
Conductor sizes up through 4/0 AWG are expressed in American Wire Gauge (AWG).
Conductor sizes larger than 4/0 AWG are expressed in ... - Answer -Kcmil
The smallest wire size for which the over-current protection is specified in the Code is ...
- Answer -14 AWG
The NEC requires that conductors 8 AWG and larger must be ... when installed in a
raceway - Answer -Stranded
Branch circuit conductors shall have an ampacity ... the maximum to be served -
Answer -Not less than
Old electrical books and plans sometimes use the term "MCM", which means the same
things as ... - Answer -Kcmil
The rating of a branch circuit is determined by its ... - Answer -Over current protection
device (fuse or circuit-breaker)
The total range of utilization equipment fastened in place, other than luminaries (lighting
fixtures), shall not exceed ... percent of the branch-circuit ampere rating, where lighting
units, cord and plug connected utilization equipment not fastened in place, or both, are
also supplied - Answer -50
For given conductor size, which material has the greatest ampacity? - Answer -Copper
Connectors marked ... are suitable for use with aluminum, copper, or copper-clad
conductors. Connectors not so marked are for use with copper conductors only -
Answer -AL/CU
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