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Computer Hardware - Engineering

Q1:

On a dot matrix printer, you should never lubricate which part?

A carriage rails

B printhead pins

C paper advance bearings

D carriage bearings

E None of the above

ANS:B - printhead pins

In dot matrix printer, printhead pins are use to print Alphabates, numaric & symbols words. So in these printhead pins only Printer ink is flow not any lubricates.