A+ Complete Study Guide by David Groth

By David Groth

I handed my three hundred sequence A+ examination the 1st time after learning this e-book and the perform assessments. now not that the three hundred sequence has been retired, yet that I handed my examination on June 29, 2007; the day ahead of the three hundred sequence tests have been to retire!
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If you work for a large company, it will probably have a central air compressor as a source for compressed air. com 30 Chapter 1 Basic Computer Service Concepts compressor is not available, you can use cans of compressed air, but they can be expensive—especially if several are needed. In any case, be sure to bring the computer outside before squirting it with compressed air. Soldering Iron One tool that is used less and less in the computer service industry is the soldering iron. You might use one occasionally to splice a broken wire; otherwise you won’t have much need for it.

15). The type of screw that this screwdriver removes is not used much anymore (primarily because the screw head was easily damaged). com Tools of the Trade 27 We strongly advise against using a flathead screwdriver to pry anything open on a computer. Computers are usually put together very well, and if it seems that you need to pry something apart, it’s probably because there’s still a screw or fastener holding it together somewhere. 16). Phillips-head screws are used because they have more surfaces to turn against, reducing the risk of damaging the head of the screw.

The electricity is dissipated in the form of heat. There are two types of resistors: fixed and variable. Fixed Resistors Fixed resistors are used when you need to reduce the current by a certain amount. 3). Their resistance level is indicated by means of colored bands painted on the resistor. 3 9 A fixed resistor Fixed resistors are color coded to identify their resistance values. They are color coded rather than having their values printed right on their bodies for two reasons. First, the resistors are only 3 ⁄4 inch long.

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