intro t/Climbing wooden poles

which of the following is not a true statement about a power grid?

• it helps ensure a continuous flow of power to customers

• it allows companies to buy and sell power to each other

• it provides power to individual companies when needed

• it always extends across a continent

A transmission and distribution system carries electricity from ___ to ___

• power plants; customers

• customers; power plants

• water sewage systems; customers

• customers; industrial waste landfills

which of the following components provides a source of electricity for a transmission and distribution system?

• substations

• distribution lines

• switchyards

• transmission lines

• power plants

a power grid is a network of major electrical conditions that link individual utility companies together

• true

• false

___ can be thought of as kind of pressure that can cause electricity to flow

• voltage

• wattage

which of the following statements is incorrect?

• resistance is a load's opposition to current flow

• power is the electrical energy consumed in performing work

• current flow depends on the amount of resistance in a load

• resistance is the electrical energy consumed in doing work

power is measured in ___, while voltage is measured in ___

• watts; volts

• volts; watts

power plants produce electricity by converting the potential energy in fuel into electrical energy

• true

• false

a unit transformer increases voltage before electricity is sent on to the transmission and distribution system

• true

• false

which of the following is not descriptive of a typical oil circuit breaker?

• it is used to open and close electrical circuits

• it can automatically interrupt power when certain electrical problems are detected

• its contacts are submerged in oil to prevent arcing

• it uses high pressure SF6 gas to snuff out arcs