IT Essentials 7.0 Chapter 3.2

What unit is used to measure the amount of resistance to the flow of current in a circuit?

• ohms

• volts

• watts

• amps

Which device can protect computer equipment from brownouts by providing a consistent quality of electrical power?

• UPS

• SPS

• AC adapter

• surge suppressor

How does an inline UPS protect computer equipment against electrical power brownouts and blackouts?

• by grounding excess electrical voltage

• by using a battery to supply a constant level of voltage

• by switching from main power to a standby power source

• by stopping the flow of voltage to the computer

Which condition refers to a reduced voltage level of AC power that lasts for an extended period of time?

• brownout

• sag

• spike

• surge

What electrical unit refers to the number of electrons moving through a circuit per second?

• current

• voltage

• resistance

• power

What characteristic of electricity is expressed in watts?

• the amount of work required to move electrons through a circuit

• the resistance to the flow of current in a circuit

• the amount of electrons flowing through a circuit per second

• the work required to move electrons through a circuit multiplied by the number of electrons flowing through a circuit per second