A(n) ____ is a sign that an adverse event is underway and has a probability of becoming an incident.

A. precursor
B. inactive system
C. indication
D. signal


Answer: C

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Class 2 or Class 3 audio circuit conductors in accordance with section 640.9 of the NEC®, __________ occupy the same cable or raceway with other Class 2 or Class 3 remote control or signaling circuits.

A. Shall not be permitted to B. Shall C. Shall be permitted to D. Must

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In the basic warm-air furnace, many controls that are applicable to warm-air furnaces depend on the type of energy that is being used to supply the heat to the structure.

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

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If you have correctly placed the root pass, there will be no reason to _____ it.? ?  

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

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There are two types of compression fittings: the ____ fitting and the barrel compression fitting.

A. sweated B. soldered C. flared D. crimped

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