In addition to removing moisture from compressed air, refrigeration air dryers are also effective at removing _____.

a. negative ions
b. compressor lubrication oil
c. fine particles
d. organic matter


b. compressor lubrication oil

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_____ uses a laser with a GMAW or GTAW arc to produce high-speed, deep-penetrating welds that have narrow, heat-affected zones with excellent metallurgical and mechanical properties.? ?  

Fill in the blank(s) with the appropriate word(s).

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Most fuel filters are designed to remove particles larger than ________

A) 70 microns B) 100 microns C) 20 microns D) 10 micron

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On some furnaces little pops and pings can be heard before the blower comes on. What causes this noise?

What will be an ideal response?

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Section lines are shown on all parts of a section, especially thin parts.

Answer the following statement true (T) or false (F)

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