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C-39 ROOFING TRADE EXAM VERSION 1 NEWEST 2025/2026
ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
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
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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
What is the correct exposure for #235 asphalt shingles? -
ANSWER-5"
Of the following, the most common size of drip edge is: -
ANSWER-2" x 2"
The purpose of an expansion joint is: - ANSWER-Separate two
building sections to allow expansion of materials without
damaging the waterproofing system
Approximately how many pounds of material is required for one
square of a 3-ply asphalt and gravel roofing job? - ANSWER-
300lb
The purpose of installing a can't strip is to support the: -
ANSWER-Base flashing
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What is the minimum depth to ratio for half-round gutters? -
ANSWER-1:2
What is the minimum height a ladder should extend beyond the
landing? - ANSWER-36"
Who does not have to keep Cal/OSHA records of injury and
illnesses? - ANSWER-Employers with 10 or fewer employees
Extension ladders must overlap _______ of their working length. -
ANSWER-10%
Landing platforms must be provided every _______ if a worker
must climb to a height greater than 20 feet on a ladder. -
ANSWER-20 ft
In an excavated area provide a ladder every: - ANSWER-50 ft
C-39 ROOFING TRADE EXAM VERSION 1 NEWEST 2025/2026
ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
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
,2|Page
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
What is the correct exposure for #235 asphalt shingles? -
ANSWER-5"
Of the following, the most common size of drip edge is: -
ANSWER-2" x 2"
The purpose of an expansion joint is: - ANSWER-Separate two
building sections to allow expansion of materials without
damaging the waterproofing system
Approximately how many pounds of material is required for one
square of a 3-ply asphalt and gravel roofing job? - ANSWER-
300lb
The purpose of installing a can't strip is to support the: -
ANSWER-Base flashing
, 3|Page
What is the minimum depth to ratio for half-round gutters? -
ANSWER-1:2
What is the minimum height a ladder should extend beyond the
landing? - ANSWER-36"
Who does not have to keep Cal/OSHA records of injury and
illnesses? - ANSWER-Employers with 10 or fewer employees
Extension ladders must overlap _______ of their working length. -
ANSWER-10%
Landing platforms must be provided every _______ if a worker
must climb to a height greater than 20 feet on a ladder. -
ANSWER-20 ft
In an excavated area provide a ladder every: - ANSWER-50 ft
