Brainscape's Knowledge GenomeTM

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


See full index

NLC ELP Rig & EG1 > EG1 CH.9 > Flashcards

EG1 CH.9 Flashcards

1
Q

What is the typical max distance distribution reaches?

A

50 miles

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

What can the distribution be visualized as?

A

streets

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

What is the average distribution span length?

A

300 ft

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

What is the typical material used for distribution lines?

A

Aluminum

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

What in the primary type of current for distribution?

A

AC

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

What is the purpose of the distribution system?

A

To deliver power safely, with acceptable quality and reliability, and with a minimum loss of power.

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

T or F: Circuit design on distribution lines has little impact on reliability.

A

False

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

What is the term for an energized line?

A

Phase

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

What is another name for main lines?

A

Feeder Mains

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

T or F: Three phase main line may or may not have a neutral.

A

True

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

What type of lines do distribution circuits consist of?

A

Main and Tap lines

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

In regards to the wires, what is the difference between main lines and tap lines?

A

Main lines are larger than tap lines.

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

What is another name for a WYE circuit?

A

Star system

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

Describe the construction of a WYE system?

A

Four wires, three phase with a neutral conductor

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

What is V phase construction?

A

it is a two phase tap line with a neutral that serves light three-phase loads

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

On what circuit type is V phase construction commonly found?

A

WYE system

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

Distribution lines consist of three main elements or levels. What are they?

A

Primary, secondary, and service

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

Describe a primary line.

A

High voltage distribution line

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

Describe a secondary line.

A

Low voltage lines pole to pole lines

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

On an overhead system secondary runs pole to pole, what is the underground equivalent?

A

padmount to pedestal

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

Describe a service line.

A

low voltage lines pole or pedestal to customer

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

Underground systems are normally designed so each transformer can be served from two directions, What is this known as?

A

Loop design

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

What are the two benefits of a loop design?

A

improves reliability and convenient for line crews to work on the system

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

What is the voltage range for secondary?

A

120-480 V

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

What determines the number of customers on a circuit?

A

density of area, type of customers, and capacity of circuit

26
Q

Utilities have four classifications of customers. What are they?

A

Residential, commercial, agricultural, and industrial

27
Q

What are utilities obligated to provide to customers?

A

Acceptable voltages at the meter

28
Q

What is the acceptable voltage range at the meter?

A

114-126 V

29
Q

How much more expensive are underground systems compared to overhead?

A

4x

30
Q

T or F: Most circuits are either entirely overhead or entirely underground.

A

False, MOST circuits are a combination of both.

31
Q

What is the height range for distribution poles?

A

35 - 55

32
Q

What materials can distribution poles be made from?

A

Fiberglass, wood, and steel

33
Q

T or F: Primary lines are only found on the main line.

A

False

34
Q

Name the distribution component being described.

Made from either wood of fiberglass and supported by braces/brackets.

A

Crossarms

35
Q

Name the distribution component being described.

Made from porcelain or polymer and used to support the conductor.

A

Insulator

36
Q

Name the distribution component being described. Made from porcelain or polymer and offers more contact area at the point of attachment and used with larger conductors.

A

Post insulator

37
Q

Conductor sizes have increased over the years. Why?

A

Deliver larger amounts of power and reduce line loss

38
Q

As the number of customers decreases down the line what happens to the conductor?

A

Gets smaller

39
Q

The ultimate destination of nearly all power lines and is more than meets the eye.

A

Transformer or transformer bank

40
Q

What category do the following components belong to? Fused cutout switches, reclosers, sectionalizers, and lightning arresters

A

Protective equipment

41
Q

Name the distribution component being described. Protects from faults, burns out and falls open. Allows linemen to quickly find faults.

A

Fused Cutout Switch

42
Q

Name the distribution component being described. An in-line device that can determine whether a fault is temporary or permanent by performing its function up to four time.

A

Recloser

43
Q

Name the distribution component being described. Installed to clear faulted sections from the line and are coordinated with reclosers.

A

Sectionalizers

44
Q

Name the distribution component being described. Used to protect the line from surges by diverting them to the ground.

A

Lightning or Surge Arresters

45
Q

Name the distribution component being described.

Can automatically control voltage levels.

A

Voltage regulator

46
Q

Name the distribution component being described. Used to improve the efficiency of the circuit. They reduce the flow of power that does not perform any useful function.

A

Capacitors

47
Q

Name the distribution component being described. Used to counteract the negative effects of inductive reactance. Can be manually or automatically controlled.

A

Capacitors

48
Q

Name the distribution component being described. Placed throughout the main line to redirect power or sectionalize a portion of a line. Can only be used manually.

A

Gang Operated Switches

49
Q

What are the common classifications for underground equipment?

A

padmounted or subsurface

50
Q

The term for underground lines.

A

Cable

51
Q

Most utilities install underground cables in what?

A

Conduit

52
Q

Broad term used to classify various types of concrete, fiberglass, or composite-type housing, which are used to splice cables, terminate cables, or house equipment.

A

Enclosures

53
Q

Name the underground component being described. Larger concrete structures, which are typically installed in larger cities to house heavy cables and equipment.

A

Manholes

54
Q

Name the underground component being described. Above ground and are used to splice low voltage secondary and service conductors.

A

Pedestals

55
Q

Name the underground component being described. Classified as either padmount or subsurface, the single-phase units are combined into one three-phase unit.

A

Transformer

56
Q

Term used to identify a pole where there is a transition from an overhead circuit to an underground circuit or vice versa.

A

Riser/Dip pole

57
Q

T or F: A utility does not need to get legal rights to construct and maintain lines.

A

False

58
Q

Name the circuit design being described. In this design, the circuits are independent and radiate into the service area. This design is the least reliable.

A

Radial

59
Q

Name the circuit design being described. In this design the circuits can be connected together automatically or manually at one or more points and can be fed from adjacent circuits.

A

Radial Tie

60
Q

Name the circuit design being described. In this design, the circuits are connected together as well as transformers and runs low-voltage three-phase. Extremely reliable.

A

Network Grid Design

61
Q

The most reliable but also the most expensive circuit design.

A

Network Grid Design

NLC ELP Rig & EG1 (19 decks)

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