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C-39 ROOFING TRADE TEST 1 AND TEST 2
NEWEST 2025 ACTUAL EXAM COMPLETE 100
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
C-39 ROOFING TRADE TEST 1
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"
How much will copper expand in 10' over a 100*F temperature change? - ANSWER-1/8"
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Which is the most common method of mastering copper to a substrate? - ANSWER-Cleating
Brackets used to support gutters should be installed on 3'
centers and secured by: - ANSWER-2 fasteners
The maximum permitted length of a gutter is _______ between ends or expansion joints. - ANSWER-50'
Joints in gutters should be lapped 1" riveted on _______ centers, and soldered. - ANSWER-2"
The plan area of a building is 2,600 sq ft of roofing with a design factor of 1.10. The downspout for the gutter will drain 200 sq ft of roof area per 1 sq in of downspout area.What should be the area for the downspout? - ANSWER- 14.3 sq in
You are installing a galvanized steel roof and the plans call for a built-in gutter. Which metal should you use for the gutter? - ANSWER-Stainless steel 2 / 4
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When designing a rectangular gutter, the minimum ratio
of depth to width should be: - ANSWER-3 to 4
To protect the edge of the building and metal roof from
rain and wind, you should install a: - ANSWER-Perimeter
flashing
What should be the minimum gage of galvanized steel valley flashing? - ANSWER-24 gage
How many fasteners per cleat are required when using expansion cleats for standing seam metal roofs with continuous pans over 30' in length? - ANSWER-2
Rigid insulation is to be applied over a wood roof deck. A metal or wood grid system must be installed if the rigid
insulation is: - ANSWER-1 1/2" thick or greater
At what slope does a roof become a high-pitched roof? -
ANSWER-Over 6:12 3 / 4
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A roof is considered to be low-pitched when its slope is: -
ANSWER-3:12 or less
A roof with a slope of 8:12 is considered what pitch? -
ANSWER-1/3 pitch
Your crew is on the roof welding with materials containing beryllium and there is a strong wind.According to Cal/OSHA, what must you do? - ANSWER- Require crew to wear supplied-air respirators
What thickness of zinc coating is placed on steel sheets to create galvanized sheets? - ANSWER-1.25 oz/sq ft
What type of flux is used to solder copper? - ANSWER- Cut acid
Which solder is best for copper? - ANSWER-50/50 tin- lead
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