How does an acid etch primer adhere to the surface of bare metal substrate?
What will be an ideal response?
Because self-etching primers contain acid when applied, it etches into properly prepared bare metal which must be topcoated with another primer.
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Given a bandwidth of 25 MHz and a frequency reuse factor of 1 and RF channel size of 1.25 MHz and 38 calls per RF channel, find:
(a) The number of RF channels for CDMA. (b) The number of permissible calls per cell (CDMA).
One of George Washington's most significant contributions as president was
A. keeping the nation out of foreign wars. B. the signing of Jay's Treaty. C. his advice against forming permanent alliances with foreign nations. D. securing a pledge from Britain to stop arming Indians on the western lands. E. establishing the political party system.
One consequence of General William T. Sherman's style of warfare was
A. a longer war. B. the loss of more lives. C. fewer desertions on the Confederate side. D. Southern resignation to defeat. E. a shorter war that saved lives.
Primary air adjusters on atmospheric type gas burners are usually ____.
A. butterfly shutters B. sliding sleeves C. spoiler screws D. all of the above