Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ISA Utility Arborculture > Chapter 5 - Electrical Knowledge > Flashcards

Chapter 5 - Electrical Knowledge Flashcards

1
Q

____ is a measure of electrical force, similar to pressure in the hydraulic model

A

Volt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A disruption of electrical supply is called an ______

A

interruption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Electromotive force is also called

A

voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

_____ _____ (_____) is the difference in electrical energy between an energized conductor and another energized conductor, the ground, or other object

A

Electrical potential (voltage)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

____ is a measure of current

A

Amp or Ampere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

One ___ is the charge carried by 6.25 x10to the 18th electrons moving past a given point in one second

A

Amp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Amperage is ____ on a particular circuit, depending on demand.

A

variable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

As demand ____ on a circuit, amperage ____

A

increases, increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

____ is a measure of electrical power

A

Watt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

___ are calculated by multiplying volts and amps

A

Watts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A million watts is called a ______

A

Megawatt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

______ is opposition to the current flow, analogous to friction or drag.

A

Resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Resistance is measured in ____

A

Ohms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Measure of electrical resistance consisting of one volt flowing at one amp

A

Ohm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

_____ is the sum of resistance- inductive resistance and capacitive resistance

A

Impedence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

______ reactance is caused by a small amount of load lost when a current flows into a coal (such as transformers)

A

Inductive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

_____ reactance is a charge that builds up between long parallel conductors, which hinders current

A

Capacitive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

_____ is the capacity of a material to transmit electricity

A

Conductivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Materials with ____ conductivity have ____ resistance to electricity

A

high, low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

_____ is an electrical network consisting of a conductor or series of conductors through which electricity flows, including a return path to the source

A

Circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

A power _____ is a sustained service interruption

A

Outage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

_____ are amperages in a conductor that are large than those for which is rated

A

Overcurrents

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

A _____ is a bypass of an intended conducting path

A

fault

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

_____ current is the amperage of the resulting abnormal electrical flow

A

Fault

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Current that is bypassing a designed conducting path is called a ______ ______

A

short circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

_______ faults affect the dielectrical properties of a system for an instant, and no longer exist after the power has been restored.

A

Transient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

______ faults are repeated momentary interruptions in the same place due to to the same cause

A

Intermittent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

_____ _____ are inrushes of electricity. They often occur when circuits are first re-energized following an outage

A

Current Surges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

_____ is the electrification of a wire by passing it through a moving electromagnetic field

A

Inductance

30
Q

_______ _____ is a force field comprising electric and magnetic elements associated with electric charge in motion

A

Electromagnetic field

31
Q

An energized conductor or wire in a circuit is called a ______

A

phase

32
Q

_____ ______ ____ _____ _____ (_____) is a system that automatically collects data and enables remove control switching operations

A

Supervisory Control and Data Acquisition (SCADA)

33
Q

____ is a electric facility equipped with transformers, switching equipment, and protection and control devices. Voltage is changed here.

A

Substations

34
Q

Region where transmission or extra-high transmission lines are connected.

A

Transmission Interconnect

35
Q

The ______ ______ allows utilities to transfer electricity both within their systems and among one another. It enables power delivery to areas of greatest demand

A

Transmission Interconnect

36
Q

The value derived from, or a subset of the System Operating Limits, which if exceeded, could expose to a widespread area of the Bulk Electric System to instability, uncontrolled separations, or cascading outages

A

Interconnection Reliability Operation Limit (IROL)

37
Q

____ enable utilities to route power through various circuits as needed

A

Switchyards

38
Q

An electric facility that does not change voltage, but is used to route power through various circuits.

A

Switchyard

39
Q

High voltage lines generally energized between 69 and 161 kV. Connect bulk transmission substations to industrial customers or distribution substation

A

Subtransmission lines

40
Q

The portion of an electrical utility system that delivers electricity to end-users.

A

Distribution Network

41
Q

In an electric utility system, electric supply lines usually energized between 2.4 and 23kV

A

Distribution Lines

42
Q

In distribution systems, a simple design with only one path of power flow, consisting of a single track of three-phase lines from a substation, with three or single-phase laterals tapping off them to serve end-users

A

Radial System

43
Q

True or False: Radial systems are straightforward and inexpensive, the layout provides no backup source of power for customers

A

True

44
Q

_____ ______ system joins two radial circuits together with an open switch, which can be closed during a power outage

A

Loop Radial

45
Q

A ___ ____ ___ is made up of one circuit that begins at a substation and returns to the same substation. It maintains power automatically when there is a fault

A

Loop Primary circuit

46
Q

A ___ is a stationary part of an electrical generator. Contains the field windings

A

Stator

47
Q

Magnets are spun on their axes, exposing field windings in a generator to alternating positive and negative magnetic poles, which provide the movement necessary to induce _______ _____ into the coil

A

Electromotive Force

48
Q

_____ ____ ( ) is the electric current that reverses its direction many times per second at regular intervals, typically used in power supplies

A

Alternating Current (AC)

49
Q

The changing intensity and direction of alternating current is graphed in a ____ _____

A

Sine Wave

50
Q

The time it takes for a magnet to complete a revolution is a ______

A

Cycle

51
Q

The number of cycles per second in alternating current is measured in

A

Hertz

52
Q

Smooth grid functioning requires electrical generation to by synchronized at the _____ ______

A

same frequency

53
Q

______ _____ is the most common source of renewable generation

A

Hydroelectric Generation

54
Q

Aluminum has gained favor for conductors due to:

A

light weight

low cost

55
Q

Aluminum conductors have ____ conductivity than copper

A

lower

56
Q

Energized cable constructed from an aluminum wire stranded around a steel core; minimizes the tendency of alumninum to stretch when heated and adds strength

A

Aluminum conductor (core) steel-enforced cable

57
Q

Type of coated overhead primary wire used on distribution lines in densely forested areas

A

Tree Wire

58
Q

_____ wires connect an electrical circuit or equipment to the earth or some conducting body that serves in place of the earth. There is no difference in potential and no shock hazard.

A

Neutral

59
Q

____ wires are the common return path for an electrical circuit or physical connection to the earth

A

Ground

60
Q

____ wires work by providing a low resistance fault return path to the power source, and help facilitate proper over current device operation during a ground fault

A

Neutral

61
Q

Type of distribution construction consisting of three phases and a grounded or neutral wire. The phases have polarity, creating a voltage differential among them

A

Wye construction

62
Q

Type of distribution construction configuration with three phases, but no common neutral wire. There is no fixed difference between the phase-to-phase and phase-to-ground voltages

A

Delta construction

63
Q

A distribution secondary line that carries electricity from a transformer to a home or business

A

Service drop

64
Q

A lower voltage electric supply line that carries electricity from distribution transformers to service line

A

Secondary wire

65
Q

A type of secondary wire, which has two insulated conductors and a neutral wrapped around a supportive cable

A

Triplex

66
Q

Guy wires are intended for ______, rather than electrical conduction, but are conductive.

A

support

67
Q

The activation of a protection device in an electric transmission or distribution system is called

A

Operation

68
Q

Transmission Circuit breakers operate in response to what 3 types of irregularities?

A
  1. ) abnormally high amperage
  2. ) abnormally low voltage
  3. ) unequal current in 3 phases
69
Q

____ is the wire connection between energized conductors and other electrical equipment, such as transformers.

A

Taps

70
Q

____ ______ are the principal protective devices in both distribution and transmission substations

A

Circuit Breakers

71
Q

____ is a permanent operation that requires manual closure of automatic line reclosers

A

Lock Out

72
Q

A transient fault in an electrical system is called a _______ ________. They may result when an automatic recloser fails to operate

A

Transient Fault

ISA Utility Arborculture (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions