A common term used to describe the internal buildup on the surface area of a heat exchanger that results in restricted flow .

a. corrosion
b. plugging
c. fouling
d. scale


Answer: c

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The use of special tools is not important when removing return springs

Indicate whether the statement is true or false

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In a study comparing the health of the U.S. population and North American professional drivers, these drivers had a higher percentage of all of the following health problems EXCEPT:

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A. Paint binder B. Paint additive C. Catalyst D. Paint solvent

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