Over-fire draft on most residential oil furnaces should be __________ in. w.c.
A. -.01
B. -.02
C. -.03
D. -.04
Answer: B
Trades & Technology
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______ are also known as masonry guides.
A. Rope and pulley B. Line extenders C. Chimney brackets D. Corner poles
Trades & Technology
An automatic detector in which detection is continuous along the entire length of the detector is a(n) _____.
a. addressable detector b. air sampling detector c. spot detector d. line detector
Trades & Technology
Training sometimes fails because of a lack of participation in planning on the part of management.