Water Supply & DistributionCâu 59 / 120
A 60 ft straight run of CPVC hot water pipe will see a 70 degree F temperature change. Using a coefficient of thermal expansion of 0.000034 in per in per degree F, approximately how much will the run expand?
a.About 0.6 in
b.About 1.0 in
c.About 2.4 in
d.About 1.7 in
Giải thích
Convert to inches first: 60 ft = 720 in, and 720 x 0.000034 x 70 = 1.71 in of movement, which is why an offset or expansion loop is needed. The 0.6 in and 1.0 in answers come from using only part of the temperature change or forgetting the foot-to-inch conversion. The 2.4 in answer uses a temperature change near 100 degrees F rather than the 70 degrees stated.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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