Prior to leak testing, and after the fitting is finger-tight, compression fitting nuts should be initially tightened

_____.

a. one-quarter turn
b. one-half turn
c. one full turn
d. two full turns


c

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____________________ are devices that are made to aid in assemblies and fabrication of weldments. These devices are helpful when a number of similar parts are to be made.

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

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What is DNA? Why is it important? Name the scientists who fi rst described the structure?

What will be an ideal response?

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Give three definitions of ”design”?

What will be an ideal response?

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In the accompanying figure, the key switch is a ____ switch installed at an outer door of the building the alarm is to protect.

a. blocked b. manual c. lateral d. key-locked

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