____ detectors are used where combustible materials are present.
A. Heat
B. Fire flame
C. Smoke
D. Photoelectric
Answer: B
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____________________ contacts remain activated (held mechanically) until returned to their original position.
Fill in the blank(s) with the appropriate word(s).
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In a Mortar II System, you have to add _____ to the height and to the width of the glass block when determining a rough opening.
A. ¼" B. ½" C. ¾" D. 1"
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Questions such as "Which applicant developed a critical idea or design first?" cannot be answered with documentation evidence.
Answer the following statement true (T) or false (F)
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Using group relamping, all lamps are usually replaced when they have reached what percentage of rated life expectancy?
A. 20-30% B. 40-50% C. 60-80% D. 70-90%
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