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BU > Midterms > Flashcards

Midterms Flashcards

1
Q

The reciprocal of impedance.

A

Admittance

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2
Q

A transformer cooled by forced circulation of air through its core and coils.

A

Air Blast Transformer

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3
Q

A circuit breaker in which the occurs in air.

A

Air Circuit Breaker

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4
Q

A switch in which the interruption of the circuit occurs in air.

A

Air Switch

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5
Q

A periodic current, the average value of which over a period is zero.

A

Alternating Current

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6
Q

A synchronous alternating-current machine that changesmechanical [power into electrical power.

A

Alternator (Synchronous Generator)

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7
Q

An instrument for measuring electric current.

A

Ammeter

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8
Q

A charge flow of one coulomb per second.

A

Ampere

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9
Q

Current-consuming equipment, fixed or portable, such as heating or motor-operated equipment.

A

Appliance

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10
Q

A branch circuit that supplies energy top one or more outlets to which appliances are to be connected, and that has no permanently connected lighting fixtures that are not a part of an appliance.

A

Appliance Branch Circuit

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11
Q

A transformer in which part of the winding is common to both the primary and secondary
circuits.

A

Autotransformer

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12
Q

The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s).

A

Branch Circuit

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13
Q

A conductor that branches off at an angle from a continuous run of conductor.

A

Branch Conductor

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14
Q

A conductor or group of conductors that serves as a common connection for three or more circuits in a switchgear assembly.

A

Bus

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15
Q

The protective covering, such as lead or plastic, applied over a cable.

A

Cable Sheath

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16
Q

A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined

A

Circuit Breaker

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17
Q

A cable provided with a wrapping of metal, usually steel wires

A

Armored Cable

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18
Q

A flashing strobe or steadyilluminated light with wordings such as “FIRE, LEAVE THE BUILDING”.

A

Light Signal

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19
Q

The construction of walls, partitions, ceilings and floors shall meet or exceed the fire resistance ratings specified in the governing codes. The required ratings vary with building occupancy, size and height and type of construction.

A

Fire-resistant Construction

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20
Q

In addition to beingmadeoffire-resistant construction, a building of any size must have proper smoke control by removal, dilution, and/or confinement of the smoke. Such control could be as simple as opening windows or as complicated as pressurizing the building.

A

Smoke Controls

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21
Q

All exits shall be located so that the maximum length of travel to access the exit, measured from the most remote point to an approved exit along the natural and unobstructed line of travel.

A

Length of Travel

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22
Q

There shall be two separate means of egress from any space, except where a space is so small that a second exit would not provide an appreciable increase in safety.

A

Means of Egress

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23
Q

Exit enclosures such as stairways shall be used solely for exit purposes, and penetration by ducts, conduits, boxes, and pipes shall be limited and protected.

A

Exit Enclosure

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24
Q

Egress passages should be illuminated to a minimum of 1 footcandle (1 fc), and preferably 3 fc, with clearly identified and illuminated signs.

A

Adequate Lighting

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25
Q

Vertical openings shall be sealed to limit fires to a single floor.

A

Vertical Openings

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26
Q

Elevator shafts shall be vented and pressurized, depending on the HVAC systems. Elevators are not recognized as exits. Escalator floor openings shall be protected with fire shutters, unless they are protected by water curtains as part of the sprinkler system.

A

Vertical Transportation

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27
Q

A conducting path through which electric charges path for a may charge flow; ADC an circuit AC circuit is a closed is not by necessarily means of closed, an electric and field may conduct in part

A

Electric

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28
Q

A measure of permissiveness to charge flow; the reciprocal of resistance.

A

Conductance

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29
Q

A substance that has free electrons or other charge carriers which permit charge flow when an emf (electromotive force) is applied across the substance.

A

Conductor

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30
Q

A conductor having no covering or electrical insulation whatsoever.

A

Bare Conductor

31
Q

A conductor encased within material of composition or thickness that is not recognized by code as electrical insulation.

A

Covered Conductor

32
Q

A conductor encased within material of composition and thickness that is recognized by code.

A

Insulated Conductor

33
Q

A structure containing one or more ducts; commonly formed from iron pipe or other tubing.

A

Conduit

34
Q

Accessories used to complete a conduit system, such as boxes, bushings and access fitting.

A

Conduit Fittings

35
Q

An electric charge of 6.28 ? 1018 electrons. One coulomb is transferred when a current of 1 ampere continues past a point for one second.

A

Coulomb

36
Q

A device, or group of devices, or other means by which the conductors of a circuit can be disconnected from their source of supply.

A

Disconnecting Means

37
Q

A point at which energy is divided among feeders or branch or combination of both, and where overcurrent devices are usually located.

A

Distribution Center

38
Q

In practical system, electrical units comprise the volt, the ampere, the ohm, the watt, the watt-hour, the coulomb, the henry, the farad, and the joule.

A

Electrical Units

39
Q

A physical entity associated with the atomic structure of matter that occurs in polar forms (positive andnegative) and that are separable by expenditure of energy.

A

Electricity

40
Q

A branch circuit that supplies only one utilization equipment.

A

Individual Branch Circuit

41
Q

Separated from other conducting surfaces by dielectric permanently offering high resistance to the passage of current and to disruptive discharge.

A

Insulated

42
Q

The highest current rating at rated voltage that a device is intended to interrupt under standard test conditions.

A

Interrupting Rating

43
Q

A short length of conductor used to make a connection between terminals or around a break in a circuit, or around an instrument. It is usually a temporary connection.

A

Jumper

44
Q

A box with a blank cover which serves the purpose of joining different runs of raceway or cable, and provided with sufficient space for connection and branching of the enclosed conductors.

A

Junction Box

45
Q

An outlet used for direct connection of a lampholder, lighting fixture, or a cord that supplies a lampholder

A

Lighting Outlet

46
Q

The unit of conductance defined as the reciprocal of the ohm.

A

Mho

47
Q

The unit of resistance; a resistance of ohm sustains a current of 1 ampere when volt is applied across the resistance.

A

Ohm

48
Q

An instrument for measuring values.

A

Ohmmeter

49
Q

A law stating that current is directly proportional to the applied voltage and inversely proportional to resistance, reactance or impedance.

A

Ohm’s Law

50
Q

A point in a wiring system from which current is taken for supply of fixtures, lamps, heaters, etc.

A

Outlet

51
Q

Any current in excess of the rated current of the equipment or the ampacity of the conductor. It may result form overload, short circuit or ground fault.

A

Overcurrent

52
Q

A single or group of panel units designed for assembly in the form of a single panel; including buses, automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a cabinet or cutout box placed in or against a wall or partition and accessible only from the front.

A

Panel board

53
Q

A device inserted into a receptacle for connection of a cord to the conductor terminations in the receptacle.

A

Plug

54
Q

A potential difference of 1 volt is produced when 1 unit of work is done in separating unit charges through unit distance. brie-ol-bria

A

Potential Difference

55
Q

The rate of doing work, or rate of converting energy when 1 volt is applied to a load and the current demand is 1 ampere, the rate of energy conversion (power) is 1 watt.

A

Power

56
Q

An enclosed assembly that may include receptacles, circuit breakers, fuseholders, fused switches, buses and watt-hour meter mounting means.

A

Power Outlet

57
Q

A metal or a plastic box with a blank cover for insertion into a conduit run, raceway, or metallic tubing, which facilitates the drawing of conductors.

A

Pull Box

58
Q

A channel for holding wires or cables; constructed from metal, wood, plastics, rigid metal, electrical metal tubing, cast-in-place, underfloor , surface metal, surface wooden types, wireways, busways, and auxiliary gutters.

A

Raceway

59
Q

A receptacle is a contact device installed at the outlet for the connection of an attachment plug.

A

Receptacle

60
Q

An outlet where one or more receptacles are installed.

A

Receptacle Outlet

61
Q

Has a high resistance in one direction and a low resistance in the other direction.

A

Rectifier

62
Q

A physical property that opposes current and dissipates real power in the form of heat. Resistance is measured in ohms.

A

Resistance

63
Q

A circuit that provides a complete path for current and has its components connected end-to-end.

A

Series Circuit

64
Q

Service conductors made up in the form of a cable.

A

Service Cable

65
Q

The conductors from the service point to service disconnecting means.

A

Service Conductors

66
Q

The overhead service conductors from the last pole or other aerial support to and including the splices

A

Service Drop

67
Q

The service conductors between the terminals of the service equipment and a point usually outside the building, clear of building walls, where joined by tap or splice to the servicedrop.

A

Service Entrance Conductors, Overhead System

68
Q

The service conductors between the terminals of the service equipment and the point of connection to the service lateral.

A

Service-Entrance Conductors, Underground System

69
Q

The necessary equipment, usually consisting of a circuit breaker(s) or switch(es) and fuse(s) and their accessories connected to the load end of service conductors to a building or other structure, or an otherwise designated area, and intended to constitute the main control and cutoff of the supply.

A

Service Equipment

70
Q

The point of connection between facilities of the serving utility and the premises wiring.

A

Service Point

71
Q

The raceways that encloses the serviceentrance conductors.

A

Service Raceways

72
Q

A device for making, breaking, or rearranging the connections of an electric circuit.

A

Switch

73
Q

The unit of emf (Electromotive Force); 1 volt produces a current of 1 ampere in a resistance of 1 ohm.

A

Volt

74
Q

The unit of electrical power, equal to the product of 1 volt and 1 ampere in DC values, or in rms AC values.

A

Watt

BU (4 decks)

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