Craftsman Electrical Guide, Chapter 1

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

1

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

2 feet x 6 1/2 feet

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

3 feet

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

6 1/2 feet

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

7

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

8 feet

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

A general purpose branch circuit

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

A pressure connector

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

A raceway

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

A receptacle

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

A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.

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

A string of outdoor lights that is suspended between two points

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

Abrasives

"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

Acceptable to the authority having jurisdiction

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

Adjustable

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

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.

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

All combustible material

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

An insulated conductor

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

An outlet

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

At the disconnecting means

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

Attachment plug

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

Basin

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

Capable of being operated without exposing the operator to contact with live parts

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

Circuit breaker

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

Circuits for lighting and power

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

Conduit body

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

Controller

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

Demand factor

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

Deteriorating agents

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

Dusttight

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

Enclosures or guards

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

Exposed

Accessories such as locknuts, bushing, etc. are known as: a. Connectors b. Conduit bodies c. Fittings d. Ground clips Article 100 Definitions pg. 28

Fittings

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

Ground-fault circuit-interrupter (GFCI)

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

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.

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

Illumination

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

Kept locked

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

Metal-enclosed equipment

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

Motor control center

The agency that publishes the NEC is abbreviated a. HVAC b. EEEC c. NFPA d. NRA

NFPA

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

No covering or insulation whatsoever

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

Nonlinear load

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

Not less than the height of the equipment

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

Not readily accessible to persons unless special means for access are used.

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

Outline lighting

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

Overload

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

Partition, fence or screen

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

Plenum

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

Rainproof

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

Raintight

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

Remote-control circuit

"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

Rendered inaccessible by the structure or finish of the building

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

Setting

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

Signaling circuit

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

Storage

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

Switchboard

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

The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating

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

Three hours or more

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

Two, one at each end of the area

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

Wires, cables or busbars

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

Wooden plugs driven into holes in the masonry for holding wooden screws