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VISUAL DICTIONARY (ALE) > VISUAL DICTIONARY XI > Flashcards

VISUAL DICTIONARY XI Flashcards

1
Q

What is the intrinsic property of matter giving rise to all electric phenomena, occurring in two forms arbitrarily given positive and negative algebraic science and measured in coulumbs?

A

ELECTRIC CHARGE

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2
Q

What is the SI unit of electric charge, equal to the quantity of electricity transferred across a conductor by a current of one ampere in one second?

A

COULUMB (C)

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3
Q

What is the energy per unit charge available for conversion from a chemical, mechanical, or other form of energy into electrical energy, or vice versa, in a conversion device such as a battery, generator, or motor?

A

ELECTROMOTIVE FORCE

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4
Q

What do you call the voltage difference between two points that represents the work involved in the transfer of a unit charge from one point to the other?

A

POTENTIAL DIFFERENCE

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5
Q

What is the work required to move a unit charge from a reference point to a designated point?

A

POTENTIAL

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6
Q

What is a group of two or more cells to produce electric current?

A

BATTERY

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7
Q

What is a device for converting chemical into electric energy usually consisting of a receptacle with electrodes in an electrolyte?

A

CELL
ELECTRIC CELL
GALVANIC CELL
VOLTAIC CELL

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8
Q

What is a non-metallic conducting medium in which current is carried by the movement of ions?

A

ELECTROLYTE

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9
Q

What is a conductor through which current enters or leaves a non-metallic medium?

A

ELECTRODE

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10
Q

What do you call the negative terminal of a primary cell or storage battery?

A

ANODE

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11
Q

What do you call the positive terminal of a primary cell or storage battery?

A

CATHODE

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12
Q

What is the potential difference or electromotive force expressed in volts, analogous to pressure in water flow?

A

VOLTAGE

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13
Q

What is the SI unit of potential difference and electromotive force defined as the difference of electric potential between two points of a conductor carrying a constant current of one ampere and the power dissipated between the points is equal to one watt?

A

VOLT (V)

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14
Q

What is the complete path of an electric current including the source of electric energy?

A

CIRCUIT

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15
Q

What is an arrangement of components in an electric circuit in which the same current flows through each component in turn without branching?

A

SERIES

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16
Q

What is an arrangement of components in an electric circuit in which all positive terminals are connected to one conductor, and all negative terminals are connected to a second conductor, the same voltage being applied to each component?

A

PARALLEL

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17
Q

What is the product of potential difference and current in a direct-current circuit?

A

POWER

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18
Q

What is the SI unit of power equal to one joule per second or to the power represented by a current of 1 ampere flowing across a potential difference of one volt?

A

WATT (W)

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19
Q

What is an amount of power especially the power required to operate an electrical device or appliance expressed in watts?

A

WATTAGE

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20
Q

What is a unit of power equal to 1,000 watts?

A

KILOWATT (kW)

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21
Q

What is a unit of energy equal to the energy transferred or expended by 1 kilowatt in a 1 hour, a common unit of electric power consumption?

A

KILOWATT-HOUR (kWh)

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22
Q

What is the rate of flow of electric charge in a circuit per unit time, measured in amperes?

A

CURRENT

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23
Q

What is the basic SI unit of electric current, equivalent to a flow of one coulomb per second or to the steady current produced by one volt applied across a resistance of one ohm?

A

AMPERE (A)

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24
Q

What do you call the strength of an electric current measured or expressed in amperes; analogous to the rate of water flow?

A

AMPERAGE

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25
Q

what is the opposition of a conductor to the flow of current, causing some of the electric energy to be transformed into heat and usually measured in ohms?

A

RESISTANCE (R)

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26
Q

What is the Sl unit of electric resistance, equal to the resistance of a conduction in which a potential difference of one volt produces a current of one ampere?

A

OHM (Ω)

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27
Q

What law states that for any circuit the electric current (I) is directly proportional to the voltage and inversely proportional to the resistance; I=V/R?

A

OHM’S LAW

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28
Q

what principle states that the rate of production of heat by a direct current is directly proportional to the resistance of the circuit and to the square of the current?

A

JOULE’S LAW

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29
Q

What do you call the resistance per unit length of a substance with a unit cross-sectional area?

A

RESISTIVITY
SPECIFIC RESISTANCE

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30
Q

What do you call the measure of the ability of a substance to conduct electric current, equal to the reciprocal of the resistivity of the substance?

A

CONDUCTIVITY
SPECIFIC CONDUCTANCE

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31
Q

What machine converts mechanical energy into electrical energy?

A

GENERATOR

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32
Q

What is a generator for producing alternating current?

A

ALTERNATOR

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33
Q

What machine converts electric power into mechanical energy?

A

ELECTRIC MOTOR

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34
Q

What is the main current-carrying winding of a motor or generator in which electromotive force is induced?

A

ARMATURE

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35
Q

What do you call the copper or carbon conductor serving to maintain electric contact between fixed and moving elements in a motor or generator?

A

BRUSH

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36
Q

What is an electric current flowing in one direction only and having a magnitude that does not vary or varies only slightly?

A

DIRECT CURRENT (DC)

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37
Q

what is an electric current that reverses direction at regularly recurring intervals, having a magnitude that varies in sinusoidal manner?

A

ALTERNATING CURRENT (AC)

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38
Q

What is a unit of electric measurement, equal to the product of one volt and one ampere, equivalent to one watt for direct-current systems and a unit of apparent power for alternating-current systems?

A

VOLT-AMPERE (VA)

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39
Q

What is a mass of iron or other ferrous material in an electromagnet, induction coil, or transformer, serving to concentrate and intensify the magnetic field resulting from a current in a surrounding coil?

A

CORE

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40
Q

What is a conductor wound in a spiral form to introduce inductance into a circuit?

A

COIL

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41
Q

what is an electric device consisting of two or more windings wound on the same core, which employs the principle of mutual induction to convert variations of alternating current in a primary circuit into variations of voltage and current in a secondary circuit?

A

TRANSFORMER

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42
Q

What is a transformer having fewer turns in the primary winding than in the secondary, serving to transform low voltage to high voltage?

A

STEP-UP TRANSFORMER

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43
Q

What is a transformer having a greater number of turns in the primary winding than in the secondary, serving to transform high voltage to low voltage?

A

STEP- DOWN TRANSFORMER

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44
Q

what do you call the voltage supplied by a power line, measured at the point of use?

A

LINE VOLTAGE

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45
Q

What is any of several conductors extending from a main power line or transformer to the service equipment of a bldg?

A

SERVICE CONDUCTOR

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46
Q

What do you call the supplying of utilities, such as water, gas, and electricity, required or demanded by the public?

A

SERVICE

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47
Q

Referring to being operated on, powered by or transmitting high voltage

A

HIGH VOLTAGE

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48
Q

What is an auxiliary power station where electrical current is converted, as from DC to AC, or where voltage is stepped up or down?

A

SUBSTATION

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49
Q

What is the overhead portion of service conductors extending from the nearest utility pole to a bldg?

A

SERVICE DROP

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50
Q

What is the underground portion of service conductors extending from a main power line or transformer to a bldg?

A

SERVICE LATERAL

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51
Q

What is the decrease in voltage between two points on a power line, usually caused by resistance or leakage along the line?

A

LINE DROP

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52
Q

What is the portion of a service conductor extending from a service drop or service lateral to the service equipment of a bldg?

A

SERVICE ENTRANCE CONDUCTOR

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53
Q

What is a meter for measuring and recording the quantity of electric power consumed with respect to time?

A

WATT-HOUR-METER

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54
Q

What is a fire-rated room housing a transformer and auxiliary equipment for a large bldg, usually located on grade or below around and ventilated directly to the outside air?

A

TRANSFORMER VAULT

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55
Q

What do you call the room containing the service equipment for a bldg ?

A

SWITCHGEAR ROOM

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56
Q

What is the equipment necessary for controlling, metering, and protecting the electric power supply to a bldg, located near the entrance of the service conductors and usually consisting of a main disconnect switch and secondary switches, fuses, and circuit breakers?

A

SERVICE EQUIPMENT

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57
Q

What is a generator for providing emergency power during a power outage?

A

STANDBY GENERATOR
EMERGENCY GENERATOR

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58
Q

What is an emergency system designed to provide power automatically and instantaneously upon failure of the normal power supply?

A

UNINTERRUPTIBLE POWER SUPPLY

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59
Q

What is a group of panels on which are mounted switches, overcurrent devices, metering instruments, and buses for controlling and protecting a number of electric circuits?

A

SWITCHBOARD
SWITCHGEAR

60
Q

What do you call any of the conductors extending from the service equipment to various distribution points in a bldg?

61
Q

What is a freestanding enclosure housing a disconnect switch, a step-down transformer, and switchgear for a number of electric circuits?

A

UNIT SUBSTATION

62
Q

What is a fractional part of a period or cycle through which time has advanced, measured from a specified reference point and often expressed as an angle (as in electricity)?

63
Q

What do you call a conducting connection between an electric circuit or device and the earth or other point of zero potential?

64
Q

Of or pertaining to a circuit energized by an alternating current with one phase or with phases differing by 180°

A

SINGLE-PHASE

65
Q

Of or pertaining to a circuit energized by two alternating currents or voltages differing in phase by one quarter of a cycle or 90°

66
Q

Of or pertaining to a combination of three circuits energized by alternating currents or voltages differing in phase by one third of a cycle or 120°

A

THREE-PHASE

67
Q

Referring to being electrically connected to a source of voltage, or electrically charged so as to have a potential different from that of earth

68
Q

Referring to being not electrically connected to a source of voltage

69
Q

Referring to being not electrically charged

70
Q

What is a local failure in the insulation or continuity of a conductor, or in the functioning of an electrical system?

71
Q

what is an abnormal, usually accidental condition of low resistance between two points in an electric circuit, resulting in a flow of excess current?

A

SHORT CIRCUIT

72
Q

What do you call the main disconnect for the entire electrical system of a bldg, except for any emergency power systems?

A

SERVICE SWITCH

73
Q

What is a device containing a strip or wire of fusible metal that melts under the heat produced by excess current, thereby interrupting the circuit?

74
Q

What is a fuse housing a fusible link in a porcelain alp fitted with a threaded metal base?

75
Q

What is a fuse having a one-time or renewable fusible link enclosed in an insulating fiber tube?

A

CARTRIDGE FUSE

76
Q

What is a cartridge fuse having a metal blade at each end for making contact with the fusible link within?

A

KNIFE-BLADE FUSE

77
Q

What is a fuse that delays opening to allow a short-term overload to pass, as when starting a motor?

A

TIME-DELAY FUSE

78
Q

What is a board on which are mounted the switches, fuses, and circuit breakers for controlling and protecting a number of similar branch circuits, installed in a cabinet and accessible from the front only?

A

PANELBOARD

79
Q

What is a heavy conductor, usually in the form of a solid copper bar, used for collecting, carrying, and distributing large electric currents?

A

BUSBAR/BUS

80
Q

What is any conductor of an electrical system intentionally connected to a ground connection?

A

GROUNDED CONDUCTOR

81
Q

What is a conductor, such as a metal ground rod, ground plate, or cold-water pipe, firmly embedded in the earth to establish a ground connection?

A

GROUNDING ELECTRODE

82
Q

What is a switch that automatically interrupts an electric circuit to prevent excess current from damaging apparatus in the circuit or from causing a fire?

A

CIRCUIT BREAKER

83
Q

What is a conductor connecting electric equipment or a circuit to a ground connection?

A

GROUND WIRE
GROUNDING CONDUCTOR

84
Q

What is a circuit breaker that senses currents caused by ground faults and instantaneously shuts off power before damage or injury can occur?

A

GROUND-FAULT INTERRUPTER

85
Q

Referring to a momentary, usually accidental, grounding of a conducting wire

A

GROUND-FAULT

86
Q

What is any of several conducting rods installed at the top of a structure and grounded to divert lightning away from the structure?

A

LIGHTNING ROD

87
Q

What is a device for protecting electric equipment from damage by lightning or other high-voltage currents, using spark gaps to carry the current to the ground without passing through the device?

A

LIGHTNING ARRESTER

88
Q

What is the portion of an electrical system extending from the final overcurrent device protecting a circuit to the outlets served by the circuit?

A

BRANCH CIRCUIT

89
Q

What do you call a branch circuit that supplies current to a number of outlets for lighting and appliances?

A

GENERAL PURPOSE CIRCUIT

90
Q

What do you call a branch circuit that supplies current to one or more outlets specifically intended for appliances?

A

APPLIANCE CIRCUIT

91
Q

What is a branch circuit that supplies current only to a single piece of electrical equipment?

A

INDIVIDUAL CIRCUIT

92
Q

What is a panel for distributing power to other panels or to motors and other heavy power-consuming loads?

A

DISTRIBUTION PANEL

93
Q

of or pertaining to a circuit in which alternating current below 50 volts is supplied by a step-down transformer from the normal line voltage, used in residential systems to control doorbells, intercoms, heating and Looking systems, and remote lighting fixtures?

A

LOW-VOLTAGE

94
Q

What is a single insulated conductor or a bound or sheathed combination of conductors insulated from one another?

95
Q

What is an electric cable consisting of two or more insulated conductors protected by a flexible, helically wound metal wrapping?

A

ARMORED CABLE

96
Q

What is an electric cable consisting of a tubular copper sheath containing one or more conductors embedded in a highly compressed, insulating refractory mineral?

A

MINERAL-INSULATED CABLE

97
Q

What is an electric cable consisting of two or more insulated conductors enclosed in a nonmetallic, moisture-resistant, flame-retardant sheath?

A

NONMETALLIC SHEATHED CABLE

98
Q

What is a cable for transmitting high-frequency telephone, digital, or television signals, consisting of an insulated conducting tube enclosing an insulated conducting core?

A

COAXIAL CABLE

99
Q

What is an electric cable enclosed within a metallic sheath in order to reduce the effects of external electric or magnetic fields?

A

SHIELDED CABLE

100
Q

What is a pliable metallic strand or a twisted or woven assembly of such strands, often insulated with a dielectric material and used as a conductor of electricity?

101
Q

What is a substance, body, or device that conducts heat, sound, or electricity?

102
Q

What is a material that is a poor conductor of electricity, used for separating or supporting conductors to prevent the undesired flow of current?

103
Q

What do you call a nonconducting substance?

A

DIELECTRIC

104
Q

What do you call the minimum applied voltage at which a given insulator breaks down and permits current to pass?

A

BREAKDOWN VOLTAGE

105
Q

What do you call the maximum voltage that can be applied to a given material without causing it to break down, usually expressed in volts or kilovolts per unit of thickness?

A

DIELECTRIC STRENGTH

106
Q

What is an enclosure for housing and protecting electric wires or cables that are joined together in connecting or branch electric circuits?

A

JUNCTION BOX

107
Q

What is a panel in a casing or box that can readily be removed, as by punching, hammering, or cutting, to provide an opening into the interior?

108
Q

What is a rubber or plastic washer inserted in a hole in a metal part to prevent grounding of a wire passing through the hole?

109
Q

what is an insulating and protective lining for one or more conductors passing through a hole?

110
Q

What is a tube, pipe, or duct for enclosing and protecting electric wires or cable?

111
Q

What do you call a heavy-walled, tubular steel conduit joined by screwing directly into a threaded hub with locknuts and bushings?

A

RIGID METAL CONDUIT

112
Q

What do you call a thin-walled, tubular steel conduit joined by compression or set screw couplings?

A

ELECTRICAL METALLIC TUBING (EMT)

113
Q

what is a flexible, helically wound metal conduit, used for connections to motors or other vibrating equipment?

A

FLEXIBLE METAL CONDUIT
GREENFIELD CONDUIT

114
Q

What is a channel expressly designed to hold and protect electric wires and cables?

115
Q

What is a raceway designed for exposed installation in dry, nonhazardous, noncorrosive locations?

A

SURFACE RACEWAY

116
Q

what is a surface-mounted raceway designed to house the electrical wires for a circuit and a series of receptacles?

A

MULTI-OUTLET ASSEMBLY

117
Q

what is a raceway suitable for installation under a floor, often used in office bldgs to allow for the flexible placement of power, signal, and telephone outlets?

A

UNDERFLOOR RACEWAY

118
Q

what is an enclosed raceway for housing conductors or cables?

119
Q

What do you call the rigid metal housing for a group of buses insulated from each other and the enclosure?

A

BUS DUCT
BUSWAY

120
Q

what is an open metal framework for supporting insulated electrical conductors?

A

CABLE TRAY

121
Q

what is a switch in which the interruption of a circuit occurs in air?

A

AIR SWITCH

122
Q

what do you call an air switch with a hinged copper blade placed between two contact clips?

A

KNIFE SWITCH

123
Q

What is a switch controlled by a conductor floating in a liquid?

A

FLOAT SWITCH

124
Q

what is a quiet switch that opens and closes an electric circuit by shifting a sealed glass tube of mercury so as to uncover or cover the contacts?

A

MERCURY SWITCH

125
Q

what is a switch operated only by inserting a key?

A

KEY SWITCH

126
Q

what is a resistor for regulating a current by means of variable resistances?

127
Q

What is a rheostat or similar device for regulating the intensity of an electric light without appreciably affecting spatial distribution?

A

DIMMER/DIMMER SWITCH

128
Q

what do you call the protective plate surrounding an electric outlet or light switch?

129
Q

what is a device for making, breaking, or directing an electric current?

130
Q

what is a switch in which a lever or knob, moving through a small arc, causes the contacts to open or close an electric circuit?

A

TOGGLE SWITCH

131
Q

What do you call a single-pole, double-throw switch used in conjunction with another to control lights from two locations?

A

THREE-WAY SWITCH

132
Q

what do you call a switch used in conjunction with two three-way switches to control lights from three locations?

A

FOUR-WAY SWITCH

133
Q

what is a flexible, insulated conductor for electrically connecting an apparatus to another or to a circuit?

134
Q

What is a short, flexible conductor used in connecting a stationery terminal with a terminal having a limited range of motion?

135
Q

What is a conductive element or device for establishing an electric connection to an apparatus?

136
Q

What is a point on a wiring system at which current is taken to supply an electric device or apparatus?

137
Q

What is a junction box designed to facilitate connecting an electric device or receptacle to a wiring system?

A

OUTLET BOX

138
Q

what is an outlet usually mounted on a wall and housing one or more receptacles for portable lamps or appliances?

A

CONVENIENCE OUTLET

139
Q

what do you call a female fitting connected to a power supply and equipped to receive a plug?

A

RECEPTACLE/SOCKET

140
Q

what is a small, flexible, insulated cable fitted with a plug to connect a portable lamp or appliance to a receptacle?

141
Q

What is a plastic connector containing a threaded metal fitting for screwing onto the intertwined ends of two or more conductors?

142
Q

what is any device for joining two or more conductors without a permanent splice?

143
Q

what is an outlet having an additional contact for a ground connection?

A

GROUNDING OUTLET

144
Q

What is a male fitting for making an electrical connection to a circuit by insertion in a receptacle?

145
Q

what is a plug having a blade for a ground connection?

A

GROUNDING PLUG

VISUAL DICTIONARY (ALE) (18 decks)

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