Branch ducts using flexible duct should not be longer than _____.

a. 3' (0.9 m)
b. 6' (1.9 m)
c. 8' (2.4 m)
d. 12' (3.7 m)


b. 6' (1.9 m)

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Two types of seal systems that employ a seal pot are __________ seal and ________ seal.

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

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Certain qualities in a supervisor, such as _____, may cause negative feelings to develop in an employee or group of employees

A) subjective criticism B) sincerity C) ?fairness D) flexibility

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? Identify and state the historical significance of the "Gold Bugs".

What will be an ideal response?

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There are ________ classes of fire extinguishers

A) 6 B) 8 C) 4 D) 3

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