In which direction does wood shrink most:
A. parallel to the grain
B. perpendicular to the grain
C. equally parallel and perpendicular
Answer is B. perpendicular to the grain - which is the direction of the annual growth rings and to a lesser degree across the rings. are-review.blogspot.com
Which of the following detector types can detect smoke or a smoldering fire that has not yet burst into flames? A. Ionization B. Rise-of-temperature C. Photoelectric D. Flame detectors
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