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Computer Hardware

Computer Hardware
14.4 modem should transmit _____ bits per second

1400-1500
14,400-15,000
140-150
None of these
140,000-150,000

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Computer Hardware
Which device uses a DMA channel?

Network Card
All of the listed here
Modem
Sound Card

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Computer Hardware
Which component must be vacuumed or replaced during preventative maintenance on a laser printer?

Ozone filter
All of the listed here
Scanning mirror
Toner cartridge

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Computer Hardware
An important first step in troubleshooting which component in a laser printer is causing a jam is to:

turn the printer off, then on again
look up error codes
remove the jammed paper
note where in the paper path the paper stops
check all voltages

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Computer Hardware
Which hardware component controls serial port communications?

CPU
DMA823
None of these
ROM BIOS
UART 16550

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Computer Hardware
To prevent toner from sticking to a laser printer's heat rollers, apply which of the following:

Ammonia
Oil
None of these
Alcohol
Beer or Jack Daniels

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