What is the most likely explanation for why DCEP has a cleaning action?
What will be an ideal response?
There are many theories as to why DCEP has a cleaning action. The most probable explanation is that the electrons accelerated from the cathode surface lift the oxides that interfere with their movement. The positive ions accelerated to the metal's surface provide additional energy. In combination, the electrons and ions cause the surface erosion needed to produce the cleaning. Although this theory is disputed, it is important to note that cleaning does occur, that it requires argon-rich shield gases and DCEP polarity, and that it can be used to advantage.
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When an engine is disassembled, all of the pistons show some evidence of lacquering. Which of the following is the more likely cause?
A. high temperature operation B. low temperature operation C. high sulfur fuel D. failed oil control rings
List three or more of the classifications for the type of fuel.
What will be an ideal response?
The two most significant characteristics of the classification system used in the United States are a unique system of terminology and focus on measurable soil properties as a primary basis for the classification
Indicate whether the statement is true or false
Gain is measured in a term called ____.
a. beta b. alpha c. gamma d. ground