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61 Matching questions
- A raceway system is an enclosed channel designed for holding:
a. Wires, cables or busbars
b. Automotive equipment
c. Spark-plug wires
d. Equipment for high-speed autos
Article 100 Definitions pg. 31 - Which
of the following qualifying terms indicate that a circuit breaker can
be set to trip at various values of current, time, or both, within a
predetermined range?
a. Accessible
b. Adjustable
c. Setting
d. Concealed
Article 100 Definitions, circuit breaker pg. 27 - A bonding jumper is:
a. A branch circuit that supplies only one utilization equipment
b. A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected
c. An adhesive used to insulate conductors
d. Capable of being operated without exposing operator to contact with live parts.
Article 100 Definitions pg. 26 - What must be provided for in all working spaces above service equipment?
a. A water faucet to flush operator's eyes
b. A drinking fountain
c. Illumination
d. A wash basin
Article 110.26(D) Working Space, pg. 39 - In locations where electric equipment would be exposed to physical damage, the following must be provided:
a. Warning signs
b. Sufficient headroom
c. Working space
d. Enclosures or guards
Article 110.27(B) Guarding of live parts, Prevent Physical Damage pg. 39 - The value of current, time, or both at which an adjustable circuit breaker is set to trip is known as:
a. Inverse time
b. Ampacity
c. Automatic
d. Setting
Article 100 Definitions, pg. 27 - What is a branch circuit called that supplies a number of outlets for lighting and appliances?
a. An appliance branch circuit
b. An individual branch circuit
c. A general purpose branch circuit
d. A multiwire branch circuit
Article 100 Definitions pg. 27 - The NEC uses the term "isolated" to mean:
a. Not readily accessible to persons unless special means for access are used
b. Grouped together
c. Identifiable by means of color coding or nameplate
d. Nearby
Article 100 Definitions pg. 29 - Parts
of electric equipment which in ordinary operation produce arcs, sparks,
flames, or molten metal shall be enclosed or separated and isolated
from :
a. all other electrical equipment
b. All combustible material
c. Electric lighting
d. All working spaces
Article 110.18 Arcing Parts pg. 37 - A
device designed to open and close a circuit by non-automatic means and
to open the circuit automatically on a predetermined overcurrent without
damage to itself when properly applied within its rating is called a:
a. Non-fusible disconnect switch
b. Time-delay fuse
c. Circuit breaker
d. Motor running overcurrent protector
Article 100 Definitions pg. 27 - The entrance provided to give access to the working space about electric equipment rated over 600 volts must not be less than:
a. 6 feet x 6 feet
b. 24 feet x 6 feet
c. 2 feet by 6 feet
d. 2 feet x 6 1/2 feet
Article 110.33(A) Entrance to Enclosures and Access to working Space, Entrance pg. 42 - Ampacity is defined as:
a. The electromotive force required to cause electrons to flow in conductors
b. The amount of power in a circuit
c. The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating
d. The voltage rating of any appliance
Article 100 Definitions pg. 26 - Which of the following must not be allowed to come in contact with interior parts of electrical equipment?
a. Busbars
b. Wiring terminals
c. Abrasives
d. Insulators
Article 110.12(B) Integrity of Electrical Equipment and Connections pg. 35 - Any electric circuit that controls any other circuit through a relay is called a:
a. Remote-control circuit
b. Power circuit
c. Overload relay
d. Motor control circuit
Article 100 Definitions pg. 31 - The
ratio of the maximum demand of a system, or part of a system, to the
total connected load of the system or the part of the system under
consideration is known as:
a. Percentage
b. Duty cycle
c. Rated-load current
d. Demand factor
Article 100 Definitions, pg. 28 - A bare conductor is one with:
a. Several layers of thermoplastic insulation
b. Only one layer of insulation
c. A covering that is not recognized by the NEC as electrical insulation
d. No covering or insulation whatsoever
Article 100 Definitions, Conductor pg. 27 - What is the minimum depth of clear working space at electrical equipment rated above 75 kV and classified as Condition 1
Table 110.34(A) Over 600 Volts, nominal, Work space and Guarding Minimum depth of clear working space at electrical equipment pg. 43 - When
an enclosure has been constructed so that exposure to a beating rain
will not result in the entrance of water under specified test
conditions, the enclosure is known as:
a. Rainproof
b. Drip-proof
c. Raintight
d. Multioutlet assembly
Article 100 Definitions pg. 31 - The
minimum headroom of working spaces about service equipment,
switchboard, panelboards, or motor control centers shall be at least
____ feet.
a. 6 1/2 feet
b. 8 feet
c. 5.75 feet
d. 10 feet
Article 110.26(E)(1)(a)Dedicated equipment space, Indoor pg. 39 - Entrances to all rooms or other enclosures containing exposed live parts operating at over 600 volts, nominal shall be:
a. Elevated 30 feet above ground
b. Painted yellow with black and blue stripes
c. Kept unlocked for immediate servicing
d. Kept locked
Article 110.34(C) pg. 43 - Where must branch circuits and feeders be identified?
a. At the disconnecting means
b. At the point where they terminate
c. At both the point where they originate and the point where they terminate
d. Midway between the outlet and the overcurrent protective device
Article 110.22 pg. 37 - Operation of equipment in excess of normal, full-load rating is known as:
a. Hot load
b. Under current
c. Overload
d. Periodic duty
Article 100 Definitions pg. 31 - The
NEC definitions for a "bathroom" is an area containing one or more of
the following: toilet, tub, or shower, and at least one:
a. Vent-through-roof
b. Hand dryer
c. Electric heater
d. Basin
Article 100 Definitions, pg. 26 - A
device which, by insertion in a receptacle, establishes connection
between the conductor of the attached flexible cord and the conductors
connected permanently to the receptacle is called one of the following:
a. Female plug
b. Circuit breaker
c. Controller
d. Attachment plug
Article 100 Definitions pg. 26 - A device used to govern, in some predetermined manner, the electric power delivered to an electric apparatus is called a:
a. Controller
b. Heater
c. Governor
d. Motor starter
Article 100 Definitions, pg. 27 - "Concealed" as applied to electrical wiring means:
a. Rendered inaccessible by the structure or finish of the building
b. Capable of being reached quickly
c. Capable of being removed without damage
d. Admitting close approach
Article 100 Definitions pg.27 - A
separate portion of a conduit or tubing system that provides access
through a removable cover(s) to the interior of the system at a junction
of two or more sections of the system or at a terminal point of the
system is defined as a:
a. Conduit body
b. Conduit junction
c. Conduit intersection
d. Conduit T-connector
Article 100 Definitions pg. 27 - What
is the name of an electrical load where the wave shape of the
steady-state current does not follow the wave shape of the applied
voltage?
a. Linear
b. Parallel load
c. Nonlinear load
d. Series load
Article 100 Definitions, pg. 30 - Electric
parts that are not suitably guarded, isolated, or insulated and are
capable of being inadvertently touched or approached nearer than a safe
distance by a person are known as:
a. Exposed
b. Externally operable
c. Accessible
d. Dead front
Article 100 Definitions, pg. 28 - A continuous load is a load where the maximum current is expected to continue for a certain length of time. This time is:
a. One hour or more
b. Two hours or more
c. Three hours or more
d. Four hours or more
Article 100 Definitions pg. 27 - Where
switches, or other equipment operating at 600 volts, nominal, or less,
are installed ina room or enclosure where there are exposed energized
parts or wiring operating at over 600 volts, the high-voltage equipment
shall be effectively separated from the space occupied by the
low-voltage equipment by a suitable:
a. Warning sign
b. Partitian, fence or screen
c. Voltage-reducing transformer
d. Firewall
Article 110.34(B) Work Space and Guarding, Separation from Low-Voltage Equipment pg. 42 - How
tall (in feet) must a wall, screen or fence be that encloses an outdoor
electrical installation over 600 volts to deter access by unqualified
persons?
a. 5
b. 6
c. 7
d. 8
Article 110.31 Enclosure for Electrical Installations, over 600 Volts, nominal pg. 40 - When
a component used on an electrical wiring system has been constructed or
treated to prevent rain from interfering with the successful operation
of the apparatus under specified test conditions, it is known as:
A Raintight
B Readily accessible
C Rainproof
D Rated-load component
Article 100 Definitions pg. 31 - Which circuits must not be connected to any system containing only trolley wires with a ground return?
a. Ground wires
b. Grounding conductors
c. Circuits for lighting and power
d. Ungrounded trolly wires
Article 110.19 Light and Power from railway conductors pg. 37 - Which of the following best describes festoon lighting?
a. A string of outdoor lights that is suspended between two points
b. A 600 volt lighting system used in power plants
c. Low voltage lighting used on billboards
d. Underwater lighting in pools and ponds
Article 100 Definitions pg. 28 - How
many access entrances are required to working space about electrical
equipment rated 1200 amperes or more and over 6 feet wide?
a. one
b. Two, one at each end of the area
c/. Three, one on each of three sides
d. Four, one on each of four sides
Article 110.26(C)(2)Entrance two and Egress from working space, Large equipment pg. 38 - Which
of the following describes cleaning and lubricating compounds that can
cause severe damage to many plastic insulating materials?
a. Deteriorating agents
b. Cooling agents
c. Splicing agents
d. Heating agents
Article 110.11 Deteriorating Agents pg. 35 - What
is an assembly of one or more enclosed sections having a common power
supply (bus) and principally containing motor control units called?
a. Main distribution panel
b. Motor control center
c. Motor load center
d. Selector-switch control center
Article 100 Definitions, pg. 30 - When the electrical equipment exceeds 6 1/2 feet in height, what is the required minimum headroom?
a. One foot higher than the top of the highest piece of equipment
b. Not less than the height of the equipment
c. 6 inches more than the height of the equipment
d. 4 feet more than the height of the equipment
Article 110.26(A)(3) Height of working space, pg. 38 - In
cases where there are live parts normally exposed on the front of
switchboards or motor control centers, the working space in front of
such equipment shall not be less than:
a. 1 foot
b. 3 feet
c. 4 feet unless adequate protection is provided
d. 18 inches
Article 110.26(A)(1) Working Spaces, pg. 38 - What is the term used to describe an enclosing case that will not allow dust to enter under specified test conditions.
a. Dustproof
b. Dust prevention
c. Dusttight
d. Explosionproof
Article 100 Definitions pg. 28 - The NEC definition of "Qualified Person" is one who:
a. has been elected by the Inspection office
b. Has skills and knowledge related to the construction and operation of electrical equipment and installations and has received safety training to recognize and avoid the hazards involved.
c. Has served two years apprenticeship training with a labor organization
d. Has a college degree in electrical engineering or electrical technology
Article 100 Definitions pg. 31 - "Approved" as used in the NEC means:
a. Acceptable to the authority having jurisdiction
b. Acceptable only when specified in local ordinances
c. Okay for use in hazardous locations
D. Usable only for inside work
Article 100 Definitions pg. 26 - Externally operable means:
a. Capable of being operated from the outside of a building
b. An apparatus enclosed in a case
c. Capable of being operated without exposing the operator to contact with live parts
d. Surrounded by a case
Article 100 Definitions pg. 28 - Accessories such as locknuts, bushing, etc. are known as:
a. Connectors
b. Conduit bodies
c. Fittings
d. Ground clips
Article 100 Definitions pg. 28 - Working space in rooms containing electrical equipment shall not be used for:
a. Storage
b. Maintenance and repair equipment
c. Testing purposes
d. Inspection or servicing
Article 110.26(B)Clear Spaces, pg. 38 - Any electric circuit that energizes signaling equipment is known as a:
a. Low-voltage branch circuit
b. Multiwire circuit
c. Signaling circuit
d. Feeder circuit
Article 100 Definitions pg. 32 - A point on the wiring system at which current is taken to supply utilization equipment is known as:
a. An outlet
b. A wall switch
c. A load center
d. A motor control center
Article 100 Definitions pg. 30 - A
device that establishes a connection between two or more conductors by
means of mechanical pressure and without the use of solder is called:
a. An explosion proof connector with seal-offs
b. A pressure connector
c. A wire nut
d. A shrink connector
Article 100 Definitions, pg. 27 - Which of the following anchors may not be used to secure electrical equipment to masonry walls?
a. Lead anchors approved for the weight of the equipment
b. Toggle bolts
c. Threaded studs "shot" into the masonry
d. Wooden plugs driven into holes in the masonry for holding wooden screws
Article 110.13(A) Mounting and Cooling of Equipment, Mounting pg. 35 - A
device intended for the protection of personnel that functions to
de-energize a circuit or portion thereof within an established period of
time when a current to ground exceeds the values established for a
class A device.
a. Grounding electrode device
b. Ground-fault circuit-interrupter (GFCI)
c. Guarded protector
d. Thermal cutout
Article 100 Definitions pg. 29 - The agency that publishes the NEC is abbreviated
a. HVAC
b. EEEC
c. NFPA
d. NRA - A feeder is:
a. A circuit conductor between the final overcurrent device protecting the circuit and the outlet
b. A branch circuit that supplies several outlets
c. All conductors between the service equipment, source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device
d. A device for generating electricity
Article 100 Definitions pg. 28 - A
conductor encased within material of composition or thickness that is
recognized by the NEC as electrical insulation is known as:
a. A bare conductor
b. A covered conductor
c. A concealed conductor
d. An insulated conductor
Article 100 Definitions, Conductor pg. 27 - To
provide access to the working space about electric equipment, the
following number of entrances of sufficient size must be provided:
a. 3
b. 2
c. 1
d. 4
Article 110.26(C)(1) Entrance to and Egress from Working Space, Minimum required pg. 38 - A compartment or chamber to which one or more air ducts are connected and which forms part of the air distribution system is a:
a. Plenum
B. Duct
C. Fan-coil unit
D. Air valve
Article 100 Definitions pg. 31 - A contact device installed at an outlet for the connection of an attachment plug is called:
a. A terminator
b. A junction box
c. An overcurrent protection device
d. A receptacle
Article 100 Definitions pg.31 - An
arrangement of incandescent lamps or electric discharge lighting to
call attention to certain features such as the shape of a building is
called:
a. Festoon lighting used for outdoor parties and to highlight other outdoor functions
b. Outline lighting
c. High-intensity discharge lighting such as normally used at intersections of highways
d. Decorative lighting inside a building
Article 100 Definitions, pg. 30 - An enclosed channel designed expressly for holding wires, cables, or busbars is called:
a. A hose
b. A raceway
c. A receptacle
d. A panelboard
Article 100 Definitions pg. 31 - Indoor electrical installations over 600 volts that are open to unqualified persons shall be made with:
a. Open switchgear with readily accessible live parts
b. Metal-enclosed equipment
c. Provisions to enclose the equipment within a barrier less than 8 feet high
d. The approval of both the I.B.E.W. and the I.E.S.
Article 110.31(B)(1) Indoor Installations, In Places Accessible to Unqualified Persons pg. 40 - A
large single panel, or assembly of panels, on which are mounted
switches, overcurrent or other protective devices will fall under the
definition of:
a. General-use switch
b. Thermal protector
c. Switchboard
d. Cutout
Article 100 Definitions pg. 33
- a NFPA
- b Plenum
- c Wooden plugs driven into holes in the masonry for holding wooden screws
- d Capable of being operated without exposing the operator to contact with live parts
- e 3 feet
- f Metal-enclosed equipment
- g Circuit breaker
- h A pressure connector
- i Three hours or more
- j A string of outdoor lights that is suspended between two points
- k Attachment plug
- l Controller
- m 1
- n No covering or insulation whatsoever
- o Rendered inaccessible by the structure or finish of the building
- p 6 1/2 feet
- q 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.
- r Partition, fence or screen
- s Not readily accessible to persons unless special means for access are used.
- t Demand factor
- u An insulated conductor
- v Rainproof
- w A general purpose branch circuit
- x Raintight
- y Setting
- z Abrasives
- aa 8 feet
- ab Kept locked
- ac Overload
- ad Dusttight
- ae Exposed
- af Wires, cables or busbars
- ag Deteriorating agents
- ah An outlet
- ai Not less than the height of the equipment
- aj The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating
- ak Ground-fault circuit-interrupter (GFCI)
- al Adjustable
- am Switchboard
- an 2 feet x 6 1/2 feet
- ao At the disconnecting means
- ap A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.
- aq Has skills and knowledge related to the construction and operation of electrical equipment and installations and has received safety training to recognize and avoid the hazards involved.
- ar Illumination
- as Motor control center
- at Nonlinear load
- au All combustible material
- av Basin
- aw Acceptable to the authority having jurisdiction
- ax Remote-control circuit
- ay Circuits for lighting and power
- az A raceway
- ba Outline lighting
- bb A receptacle
- bc Storage
- bd Signaling circuit
- be Enclosures or guards
- bf 7
- bg Two, one at each end of the area
- bh Conduit body
- bi Fittings