The abbreviation for refrigerants containing fluorine, carbon, and hydrogen is ____.

A. HFC
B. HCFC
C. CFC
D. HFAC


Answer: A

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The ____ group of stainless steels is by far the most common.

A. austenitic B. ferritic C. martensitic D. precipitation hardening

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The tool shown in the above figure is used to _____.



a. measure the inside diameter of tubing
b. cut copper tubing
c. make threads in tubing
d. measure thread pitch

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?The _____ circle is what the cam would be if there were no lobe.

What will be an ideal response?

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If there are several lintels alike, they are normally shown on the plans by a symbol and are then described more fully in a lintel schedule.

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

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