- | P a g e
C-39 Roofing Trade Exam Version 1 Newest 2025/2026 Complete 100 Questions And Correct Detailed Answers (Verified Answers) |Already Graded A+||Brand New Version!!
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
When designing a rectangular gutter, the minimum ratio of
depth to width should be: - ANSWER-3 to 4 1 / 3
- | P a g e
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
A roof is considered to be low-pitched when its slope is: -
ANSWER-3:12 or less
- / 3
- | P a g e
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
Acid flux residue can be removed with what liquid? - ANSWER-5-10% solution of washing soda
When it is necessary to install dissimilar metals, you can place
sheet lead or building paper between the metals or paint with: -
ANSWER-Asphaltum paint
- / 3