How can a confined space, such as a walk-in cooler or underground tunnel, become a safety hazard?
A) Electricity flows more readily in a confined space.
B) Cell phones do not receive service in confined spaces.
C) The oxygen is limited—long exposure can cause suffocation.
D) The nitrogen can combine with carbon dioxide to form a toxic gas.
C
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Describe inductive reactance.
What will be an ideal response?
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The symbol for reactance is _____.
A. RL B. XL C. L D. H
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To make a 221 2 -degree turn, you must join two pipes that have been cut with _____ miters.
a.
b.
c. 30-degree
d. 45-degree
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Which of the following scale ratios represents the largest scale map?
A) 1:100,000 B) 1:10,000 C) 1:20,000 D) 1:500,000
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