Discuss the difference between sacrificial corrosion and galvanic corrosion.
What will be an ideal response?
SACRIFICIAL CORROSION: A form of corrosion in which one metal such as zinc oxidizes, sacrificing itself to form a protective coating over another metal, thus slowing down the deterioration of the first metal.
GALVANIC CORROSION: A form of corrosion that occurs when two or more different types of metal come into contact with each other causing the more reactive metal to break down, causing corrosion where otherwise neither would have corroded alone. This type of corrosion is often thought to be detrimental when it occurs on an automobile.
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For a straight pull, the minimum length for a pull box with two 1" conduits and one 4" conduit on one wall and two 1" conduits and one 4" conduit entering the opposite wall is _____. (The conductor size is No. 4 AWG or larger, but operating at less than 1,000V.)
a. 24" b. 26" c. 32" d. 34"
Why was the concept of the UJM so popular with riders in the 1970s?
What will be an ideal response?
DTC P0302 is a ________
A) Vehicle manufacturer-specific DTC B) Idle speed-related DTC C) Transmission/transaxle-related DTC D) Generic DTC
The X.25 protocol is unsuitable for today's communications because of its
A) high error rate B) high latency rate C) extensive error checking and retransmission schemes necessary D) low data transmission speed E) all of the above