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C-39 Roofing Trade Exam Version 3 Newest 2025/2026 Complete 100 Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+||Brand New Version!!
When installing composite shingles on a roof with a slope of less than 3:12, a common practice is to: - ANSWER-Use double layers of 15 pound felt for an underlayment
You must notify DOSH if asbestos concentrations reach: -
ANSWER-0.1%
One of the disadvantage of using Hypalon is that it breaks down
when exposed to: - ANSWER-None of the above, Hypalon is
resistant to all of these
Sections of metal roofing are usually referred to as: - ANSWER-
Pans
The best roofing method for metal roofs that have only a slight
slope is to use a: - ANSWER-Flat seam
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When installing a flat seam roof, the seams may be sealed with a sealant except where the slope is less than _______, in which
case the seam must be soldered. - ANSWER-3:12
Flat seam roofs of slight pitch should be divided by expansion
battens into sections not exceeding: - ANSWER-30 ft square
Before installing a flat seam roof, a wood deck should be
covered with: - ANSWER-30 lb felt
In the flat seam roofing method, the roof is covered by plans
made from: - ANSWER-20" x 28" sheets
What is the minimum gage copper recommended for flat seam roofs? - ANSWER-16 oz
Batten seam roof are not recommended for roofs having a slope less than: - ANSWER-3:12
Which of the following metals will expand the most? - ANSWER-Aluminum
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Which of the following metals will expand the most? - ANSWER-Zinc
0.020" thick aluminum is approximately: - ANSWER-24 gage
0.020" thick copper approximately equals: - ANSWER-24 gage,
B&S
Which is lowest on the galvanic scale? - ANSWER-Steel
Which has the least rigidity? - ANSWER-16 oz soft copper
When joining 22 oz copper sheets, which procedure would produce the strongest joint? - ANSWER-Sheets lapped, riveted, and soldered
A 10' length of stainless steel will expand _______ with a temperature increase of 100*F - ANSWER-1/8"
Sheet copper is over _______ wide. - ANSWER-24"
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