Maintenance Basics

Cutout switches reduce the voltage of electricity from distribution levels to customer levels. a)true b)false

C) Jack

Match the appropriate units of measure with their corresponding quantities. a) ________ Voltage 1. Ohms b) ________ Current 2.Watts c) ________ Resistance 3.Volts d) ________ Power 4.Amps, or amperes

a) Volts = Voltage b) Current = Amps, or amperes c)Resistance = Ohms d)Power = Watts

The larger bushings on a station transformer are usually located on the : a) transmission lines side b) distribution lines side c) substation side d) larger conductors

a) transmission lines side

Power can be redirected through a variety of different circuits in a substation when it is necessary to isolate certain lines or equipment for maintenance or repair. a)true b)false

a) true

___________ can be thought of as a kind of pressure that can cause electricity to flow. a)Voltage b)Current c)Resistance d)Amperage

a)Voltage

A power grid is a network of major electrical conductors that link individual utility companies together. a)true b)false

a)true

A unit transformer increases voltage before electricity is sent on to the transmission and distribution system. a)true b)false

a)true

Load refers to all the devices in an electrical circuit that consume electricity. a)true b)false

a)true

Power plants produce electricity by converting the potential energy in fuel into electrical energy. a)true b)false

a)true

Switchyards can redirect electricity through alternate flow paths by opening and closing certain circuit breakers and disconnect switches. a)true b)false

a)true

The major components of a switchyard include circuit breakers and disconnect switches. a)true b)false

a)true

Transmission lines are made up of three major component: conductors, structures, and insulators a)true b)false

a)true

Which of the following is not a characteristic of a typical switchyard? a) It is an enclosed area with devices that open and close circuits. b) It receives power from only one power source. c) It can direct power through several paths to transmission lines. d) It usually receives power from conductors leaving a plant's unit transformer.

b) It receives power from only one power source.

Substations receive ___________ voltage electricity from transmission lines and ________ the voltage so that the electricity can be distributed to local customers. a) high; increase b) high; decrease c) low; increase d) low; decrease

b) high; decrease

_____________ is the amount of electricity flowing through a line at a given time. a)Resistance b)Current c)Ohms d)Impedance

b)Current

Which of the following statements is incorrect? a)Resistance is a load's opposition to current flow. b)Power is the electrical energy consumed in performing work. c)Current flow depends on the amount of resistance in a load d)Resistance is the electrical energy consumed in doing work.

b)Power is the electrical energy consumed in performing work

A rigid lattice tower must be guyed for support. a)true b)false

b)false

Which of the following is not descriptive of reclosers? a) They can interrupt power by opening a circuit b) They can detect problems in a circuit c) They are exactly the same as circuit breakers d) They will attempt to reclose a circuit after a short period of time.

c) They are exactly the same as circuit breakers

Which of the following is not descriptive of transmission line conductors? a) They are usually bare metal wires b) They can transmit power at extremely high voltage c) They can support structures. d) They are usually strung in groups of three.

c) They can support structures.

Which of the following is not descriptive of typical disconnect switches? a) They are usually located on both sides of a breaker. b) They are used to electrically isolate equipment or lines. c) They should be opened before opening a breaker. d) They prevent equipment from being energized if the breaker is accidentally closed.

c) They should be opened before opening a breaker

In rural areas, customers may receive power directly from a transformer through a service drop. a)true b)false

c)Banks

Which of the following lists the major components of a typical transmission and distribution systems in the order that electricity flows through them? a)Substation, Distribution lines, Switchyard, Transmission lines b)Distribution lines, Switchyard, Transmission lines, Substation c)Switchyard, Transmission lines, Substation, Distribution lines d)Transmission lines, Substation, Distribution lines, Substation

c)Switchyard, Transmission lines, Substation, Distribution lines

A transmission and distribution system carries electricity from: a)transformers and power plants b)substations to the public c)power plants to customers d)distribution lines to transmissions lines

c)power plants to customers

Which of the following is not descriptive of a typical oil circuit breaker? a) It is used to open and close electrical circuits. b) It can automatically interrupt power when certain electrical problems are detected. c) Its contacts are submerged in oil to prevent arcing. d) It uses high pressure SF6 gas to snuff out arcs.

d) It uses high pressure SF6 gas to snuff out arcs.

Which of the following are two types of insulators commonly used on transmission lines? a) Disc and crossarm b) Post and top c) Top and disc d) Post and disc

d) Post and disc

Which of the following is not descriptive of transmission lines? a) They carry electricity from switchyards to substations. b) They are used to link individual companies with power grids. c) They carry high-voltage electricity over long distances. d) They deliver low-voltage electricity to customers.

d) They deliver low-voltage electricity to customers.

Which of the following are not major components of a typical substation? a) Station transformers b) Disconnect switches c) Circuit breakers d) Unit transformers

d) Unit transformers

Which of the following is not a true statement about a power grid? a)It helps ensure a continuous flow of power to customers. b)It allows companies to buy and sell power to each other. c)It provides power to individual companies when needed. d)It always extends across a continent.

d)It always extends across a continent.

Distribution lines carry power from substation to urban and rural areas, where voltage is reduced before the power is delivered to customers. a)true b)false

d)Max

Which of the following components are not typically used in overhead distribution systems? a) Wooden poles and pin-type Insulators b) Conductors and cutout switches c) Unit transformers and towers d) Distribution transformers and cutout switches

e)Maggie

Which of the following components provide a source of electricity for a transmission and distribution system? a)Substations b)Distribution lines c)Switchyards d)Transmission lines e)Power plants

e)Power plants

Which of the following is not a type of conductor used in distribution systems? a) Primary feeder b) Reverse feeder c) Primary tap d) Secondary main e) Service drop

f)MangMang