TestOut Pro A+ 220-801 220-802 – Section 2.4

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EMI interference

You are troubleshooting a client connectivity problem on an ethernet network. The client system has intermittent connectivity to the network. You discover that the unshielded twisted-pair patch cable runs 75 feet from the wall outlet, passes through the ceiling and over several florescent light fixtures before reaching the client system. Which of the following may be the cause of the connectivity problem?

Unplug the computer from the AC outlet.

What is the best way to protect a computer from power spikes during an electrical storm?

Surge protector

Which of the following devices help protect against temporary, above-normal voltage?

Laser printer

Which device type should typically not be plugged into a protected outlet or UPS unit?

You should clean the monitor while it is powered off and with the power plug removed to avoid getting a shock.

Which of the following statements about cleaning monitors and display devices is true?

The computer is running on the UPS battery power

What does beeping from the UPS mean?

Conditions the power signal

Protects from over voltages

Besides protecting a computer from under voltages, a typical UPS also performs which other actions?


A vacuum cleaner that blows as well as vacuums

Which of the following features should you look for when selecting a vacuum cleaner for your cleaning kit? (Select two)

Let the computer warm up to room temperature before turning it on.

You have ordered a new laptop from an online retailer. When you come home one day after work, you find the laptop in its shipping container on your front doorstep. Is it very cold outside, and you don’t know how long it has been there. You unpack the computer and would like to know if he is working properly. What should you do?

Alcohol-based monitor wipes

Which of the following cleaning compounds should you include in your cleaning kit?

Natural bristle brush

Compressed air

Which of the following are common tools used to physically clean the inside of a computer? (Select two.)

The wireless TV system.

Your organization uses 802. 11g wireless network. Recently, other tenants installed the following equipment in your building: * A wireless television distribution system running at 2.4 GHz * A wireless phone system running 5.8 GHz * A wireless phone system running at 900 MHz * A 802.11a wireless network running in the deep 5.725-5.850 GHz frequency range. * An 802.11n wireless network ready in the 5.8 GHz frequency range. Since this equipment was installed, your wireless network has been experiencing significant interference. Which system is the blame?


You are trying to help a co-worker order a UPS for each PC in her remote office location. What rating is used to specify the size of a UPS?

Verify that cooling fans are not circulating air in the wrong directions.

Vacuum dust from the system regularly.

Which of the following is most helpful in keeping a computer cool?

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