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Electricity 1 > Electricity I Final > Flashcards

Electricity I Final Flashcards

1
Q

What is the definition of brightness?

A

The perceived amount of light reflecting from an object

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2
Q

What does a grounding conductor do?

A

A conductor that does not normally carry current, except during a fault or short circuit

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3
Q

What is an Arc Tube in an HID lamp?

A

The light-producting element of an HID lamp

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4
Q

What is the definition of filament?

A

A conductor with a resistance high enough to cause the conductor to heat

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5
Q

What is a fluorescent lamp and how does it work?

A

A low-pressure discharge lamp in which ionization of mercury vapor transforms ultraviolet energy generated by the discharge into light

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6
Q

What is the definition of a substation?

A

An assemblage of equipment installed for switching, changing, or regulating the voltage of electricity

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7
Q

What is a motion sensor and how does it work?

A

An infrared sending device that detects the movement of a temperature variance and automatically switches when the movement is detected

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8
Q

What is a GFCI and how does it work?

A

An electrical device which protects personnel by detecting ground faults and quickly disconnecting power from the circuit

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9
Q

What is an Isolated Ground Receptable and how does it work?

A

An electrical receptacle that minimizes electrical noise by providing a separate grounding path for each receptacle

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10
Q

What is a Four-way Switch and how does it work?

A

Double-pole, Double-throw switch that changes the electrical connections inside the switch from straight to diagonal “X” pattern

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11
Q

What is the defintion of recepticle?

A

A device used to connect equipment with a cord and plug to an electrical system

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12
Q

What is a two-way switch and how does it work?

A

A single-pole, single-throw switch

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13
Q

What is the definition of a residential system and what does it involve?

A

Primarily include lamp control, general-purpose receptalce, and special-purpose receptable circuits, lower voltage 240V service. Heaters, lights, oven, ect.

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14
Q

What is a thermocouple and how does it work?

A

A device that produces electricity when two different metals (like iron and constantan) that are joined together are heated

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15
Q

What is the definition of voltage surge?

A

A higher than normal boltage that temporarily exists on one or more power lines

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16
Q

What is the defintition of voltage dip?

A

A momentary low voltage

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17
Q

What is a voltage stabilitzer and why is it used?

A

A device that provides precise voltage regulation to protect equipment from voltage dips and surges

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18
Q

What does an Output Device do?

A

A device that is used to produce work, light, heat, sound, or display information

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19
Q

What is the definition of Hot Resistance?

A

The actual (true) resistance of a component when operating current is passing through the device

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20
Q

What is the stator in an AC motor?

A

The stationary part of an AC motor

21
Q

What is Breakdown Torque?

A

The maximum torque a motor can produce without an abrupt reduction in motor speed

22
Q

What is the definition of an electric motor?

A

A rotating output device that converts electrical power into a rotating, mechanical force

23
Q

How is a Delta Connection configured?

A

A transformer connection that has each transformer coil connectred end-to-end to form a closed loop

24
Q

How is a Wye Connection configured?

A

A transformer connection that has one end of each transformer coil connectrd together

25
Q

What is Hysteresis Loss?

A

Loss caused by magnetism that remains (lags) in a material after the magnetizing force has been removed

26
Q

What is a magnet?

A

A device that attracts iron and steel because of the molecular alignment of its material

27
Q

What is Fiber Optics and what do they do?

A

The method of using light to transport information from one location to another location through thin filaments of glass or plastic

28
Q

What are Bandwidths?

A

The range of frequencies that a device can accept within tolerable limits

29
Q

What is Communication Cable?

A

Cable (usually copper or fiber optic) used to transmit data from one location (or device) within a system to another location

30
Q

What is a fuse?

A

An OCPD with a fusible link that melts and opens the circuit when an overload condition or short circuit occurs

31
Q

What is a Polarized Plug?

A

A plug in which one blade is wider than the other blade

32
Q

What is a Western Union splice?

A

A splice that connects two wires that may be placed under a lot of mechanical strain

33
Q

What is a Pigtail Splice?

A

A splice that consists of twisting two wires together

34
Q

What is a wire nut and where is it used?

A

A solderless plastic connector that uses a tapered metal coil spring to twist wires together

35
Q

What is Armor-clad Cable?

A

A cable that has an outer cover made of flexible galvanized steel

36
Q

What is the definition of a conductor?

A

A material that has very little resistance and permits electrons to move through it easily

37
Q

What is an Oscilloscope and what is it used for?

A

An instrument that displays an instantaneous voltage

38
Q

What is the difference between a strobe and contact tachometer?

A

Strobe tachometer: device that uses a flashing light to measure speed of a moving object. Constact tachometer: device that measures rotational speed of an objct through direct contact of the tachometer tip with the object to be measured

39
Q

What is the difference between a clamp-on and in-line ammeter?

A

In-line in a permanent installation of a meter that reads amperage in-line of the circuit. Clamp-on measure amperage through reading the circuits magnetic force

40
Q

What resolution pertains to meters?

A

The accuracy of a DMM

41
Q

What does a Wrap Around Bar Graph display?

A

A bar graph that displays a fraction of the full range on the graph

42
Q

What does the Function Switch on a meter do?

A

Switches between the different functions of a multimeter

43
Q

What is a nonlinear scale?

A

A scale that is divided into unequally spaced segments

44
Q

What is a Banana Plug?

A

Plug-in single wires used to connect equipment together. Used in the lab

45
Q

What is a Symbol?

A

A graphic element that represents an operation, a quantity, or unit

46
Q

What is a Single-Function meter?

A

Can only meter one aspect of electricity

47
Q

How do you calculate Total Capacitance?

A

S: Ct = C1 x C2 / C1 + C2
P: Ct = C1 + C2 + C3 + ect.

48
Q

How do you caclulate Total Inductance?

A

S: Lt = L1 + L2 + etc.
P: Lt = L2 x L3 / L2 + L3.

Electricity 1 (2 decks)

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