Midterms

Question 1

The reciprocal of impedance.

Answer 1

Admittance

Question 2

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

Answer 2

Air Blast Transformer

Question 3

A circuit breaker in which the occurs in air.

Answer 3

Air Circuit Breaker

Question 4

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

Answer 4

Air Switch

Question 5

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

Answer 5

Alternating Current

Question 6

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

Answer 6

Alternator (Synchronous Generator)

Question 7

An instrument for measuring electric current.

Answer 7

Ammeter

Question 8

A charge flow of one coulomb per second.

Answer 8

Ampere

Question 9

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

Answer 9

Appliance

Question 10

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.

Answer 10

Appliance Branch Circuit

Question 11

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

Answer 11

Autotransformer

Question 12

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

Answer 12

Branch Circuit

Question 13

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

Answer 13

Branch Conductor

Question 14

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

Answer 14

Bus

Question 15

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

Answer 15

Cable Sheath

Question 16

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

Answer 16

Circuit Breaker

Question 17

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

Answer 17

Armored Cable

Question 18

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

Answer 18

Light Signal

Question 19

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.

Answer 19

Fire-resistant Construction

Question 20

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.

Answer 20

Smoke Controls

Question 21

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.

Answer 21

Length of Travel

Question 22

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.

Answer 22

Means of Egress

Question 23

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.

Answer 23

Exit Enclosure

Question 24

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

Answer 24

Adequate Lighting

Question 25

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

Answer 25

Vertical Openings

Question 26

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.

Answer 26

Vertical Transportation

Question 27

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

Answer 27

Electric

Question 28

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

Answer 28

Conductance

Question 29

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

Answer 29

Conductor

Question 30

A conductor having no covering or electrical insulation whatsoever.

Answer 30

Bare Conductor

Question 31

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

Answer 31

Covered Conductor

Question 32

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

Answer 32

Insulated Conductor

Question 33

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

Answer 33

Conduit

Question 34

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

Answer 34

Conduit Fittings

Question 35

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.

Answer 35

Coulomb

Question 36

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

Answer 36

Disconnecting Means

Question 37

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

Answer 37

Distribution Center

Question 38

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.

Answer 38

Electrical Units

Question 39

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.

Answer 39

Electricity

Question 40

A branch circuit that supplies only one utilization equipment.

Answer 40

Individual Branch Circuit

Question 41

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

Answer 41

Insulated

Question 42

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

Answer 42

Interrupting Rating

Question 43

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.

Answer 43

Jumper

Question 44

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.

Answer 44

Junction Box

Question 45

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

Answer 45

Lighting Outlet

Question 46

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

Answer 46

Mho

Question 47

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

Answer 47

Ohm

Question 48

An instrument for measuring values.

Answer 48

Ohmmeter

Question 49

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

Answer 49

Ohm’s Law

Question 50

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

Answer 50

Outlet

Question 51

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.

Answer 51

Overcurrent

Question 52

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.

Answer 52

Panel board

Question 53

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

Answer 53

Plug

Question 54

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

Answer 54

Potential Difference

Question 55

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.

Answer 55

Power

Question 56

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

Answer 56

Power Outlet

Question 57

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.

Answer 57

Pull Box

Question 58

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.

Answer 58

Raceway

Question 59

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

Answer 59

Receptacle

Question 60

An outlet where one or more receptacles are installed.

Answer 60

Receptacle Outlet

Question 61

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

Answer 61

Rectifier

Question 62

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

Answer 62

Resistance

Question 63

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

Answer 63

Series Circuit

Question 64

Service conductors made up in the form of a cable.

Answer 64

Service Cable

Question 65

The conductors from the service point to service disconnecting means.

Answer 65

Service Conductors

Question 66

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

Answer 66

Service Drop

Question 67

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.

Answer 67

Service Entrance Conductors, Overhead System

Question 68

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

Answer 68

Service-Entrance Conductors, Underground System

Question 69

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.

Answer 69

Service Equipment

Question 70

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

Answer 70

Service Point

Question 71

The raceways that encloses the serviceentrance conductors.

Answer 71

Service Raceways

Question 72

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

Answer 72

Switch

Question 73

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

Answer 73

Volt

Question 74

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

Answer 74

Watt