The primary purpose of sealants and weatherstripping is to

A) reduce air leakage through the envelope.
B) reduce vapor diffusion through the envelope.
C) reduce air diffusion through the envelope.
D) all of the above.
E) A and B.


A) reduce air leakage through the envelope.

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Which of the following is NOT a standard sledge hammer head weight?

A. 8 pounds B. 12 pounds C. 16 pounds D. 20 pounds

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Bus drop safety springs are used to maintain the proper tension on the horizontal and vertical cord runs. These springs are available with 40-, 80-, and ____-pound ratings.

A. 100 B. 120 C. 150 D. 180

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The NEC requires that the metal cases and tanks of transformers be ____________________.

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

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What plays a major role in a conductor's ability to minimizing compromising emanations?

a. Distance and angle. b. Distance and separation. c. Induction and grounding. d. Induction and impedance.

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