Most types of valves work best if they are installed with the stem in a(n) _____ position.

a. horizontal
b. downward
c. upright
d. diagonal


c. upright

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On July 3, 1844, the first formal diplomatic agreement between the United States and China was the

A. Ostend Manifesto. B. Clayton-Bulwer Treaty. C. Chinese Open-Door Treaty. D. Treaty of Wanghia. E. Hong Kong/Chinese Treaty.

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Which of the following commercial loads can be fed from a regular circuit rather than an emergency circuit?

a. Exit lights b. Life safety systems c. Fire alarm systems d. Computer equipment

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The partialauxiliary view shows only the true size and shape of the inclined surface.

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

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Grease and oil must be kept away from oxygen tanks used for brazing because they _____

a. will contaminate the brazed joints and cause them to fail b. could trigger an explosion in the presence of oxygen c. are incompatible with lubricants used on the oxygen regulator d. will clog the oxyacetylene torch

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