High-pressure gas cylinder valves have two valve seals: a main seal and one ____ to prevent gas leaks.
A. rubber seal
B. back seal
C. tight seal
D. seating seal
Answer: B
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Mike has a field of sweet corn with one outside row measuring 610 feet and the other 584 feet. The field measures 480 feet across the rows. How many acres of sweet corn are in this field?
What will be an ideal response?
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Define grounding
What will be an ideal response?
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Who was expected to run the Victorian middle-class household?
a. men b. women c. the eldest child d. servants
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Failure of rigid couplings is usually indicated by a small pile of __________________ on the floor just below the coupling assembly.
Fill in the blank(s) with the appropriate word(s).
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