In laser printer technology, what happens during the conditioning stage?
Answer: B
Correct answer: A uniform negative charge is placed on the photosensitive drum
Conditioning is the first stage of the laser printing process: the primary corona lays an even negative charge over the whole drum, which the laser then selectively discharges to write the image.
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Laser Jet printer speeds are measured in pages per minute (ppm) what do we use to measure dot-matrix printers?
Answer: D
Correct answer: characters per second
Dot matrix speed is quoted in characters per second, since the head prints one character at a time. Page printers are rated in pages per minute.
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If the voltage on pin 1 of the power supply is not in the range of _____ volts, the PC will not boot.
Answer: D
Correct answer: 2.5 - 5
Pin 1 of the AT supply carries Power Good, and the board is held in reset until that line rises into the TTL high range. If it never does, the machine never starts.
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In inkjet printers, what is the most common problem with the paper tray?
Answer: B
Correct answer: malfunctioning pick-up rollers
The rollers pick one sheet from the stack, and as their rubber hardens and polishes with age they slip - feeding nothing, or several sheets at once. That is the commonest tray fault in any printer.
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Which provides the fastest data access time?
Answer: A
Correct answer: RAM
RAM is electronic and reached in nanoseconds; a hard disk must move a head and wait for the platter, which takes milliseconds. ROM is also electronic but slower than RAM in the systems these questions describe.
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A hard disk is divided into tracks which are further subdivided into:
Answer: B
Correct answer: sectors
A disk surface is divided into concentric tracks, each divided into sectors, which are the smallest units the drive reads or writes. Clusters are groups of sectors allocated by the file system, one level above.
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With a dot matrix printer, light then dark print is most commonly caused by:
Answer: B
Correct answer: Erratic ribbon advancement
If the ribbon does not advance evenly, some characters are struck through fresh ink and others through a used part of it, so the print alternates light and dark down the page.
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What is the most significant difference between the USB and IEEE1394 standards?
Answer: A
Correct answer: IEEE 1394 is faster
FireWire ran at 400 Mbps when USB 1.1 ran at 12, which is the difference that mattered for video capture. Both are plug and play and both are hot swappable, so those cannot be what separates them.
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What is the first thing you could do to check for damage to a printer after receiving it?
Answer: D
Correct answer: Unbox it and examine it for physical damage
Damage in transit is visible, and looking for it costs nothing and risks nothing. Powering up a damaged printer or connecting it to a PC may make matters worse.
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With respect to a network interface card, the term 10/100 refers to
Answer: C
Correct answer: megabits per seconds
A 10/100 card runs at either 10 or 100 megabits per second, negotiating the higher rate when the switch at the other end supports it.
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