C-39 Roofing Trade Test 1 – Test 3 Questions And Detailed Solutions Latest Update This Year

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C-39 Roofing Trade Test 1 – Test 3 QUESTIONS AND
DETAILED SOLUTIONS LATEST UPDATE THIS YEAR

C-39 Roofing Trade Practice Test 1




QUESTION: If you know the lengths of two sides of a right angle, can you figure the length of
the third side? - ANSWER-Yes, the third side squared = a2 + b2




QUESTION: The maximum heating temperature for steep asphalt is: - ANSWER-525*F




QUESTION: What is the flash point of a coal-tar pitch kettle? - ANSWER-240-280*F




QUESTION: What is the name of the thick, black, gummy plastic used for making temporary
repairs to damp roof surfaces? - ANSWER-Wetpatch

Q; An asphalt-modified roof is: - ANSWER-Torch-applied




QUESTION: A roof has a 7' run and 8" per unit rise. What is the total rise at the ridge? -
ANSWER-56"




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QUESTION: Which of the following is NOT used as a weathering surface in single-ply roofing? -
ANSWER-Mica




QUESTION: Where are sump drains usually installed? - ANSWER-Wood decks




QUESTION: Which would be used to strengthen the eaves of a gable roof? - ANSWER-Fascia




QUESTION: For spans less than 10ft, what is the minimum size lumber that may be used with a
roofing jack? - ANSWER-2" x 6"




QUESTION: Cal/OSHA may impose _______ concerning machinery. - ANSWER-Fines and/or
restraining orders




QUESTION: Trusses should be spaced _______ apart for tile roofs. - ANSWER-2'-6"




QUESTION: Which of the following does not influence the exposure of wood shingles? -
ANSWER-Type of sheathing




QUESTION: Which of the following is least hazardous to your health? - ANSWER-Hypalon




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QUESTION: What is NOT a requirement when you reroof over a built-up roof? - ANSWER-The
deck must be torn up




QUESTION: Which of the following is not a correct statement about PVC sheet-laying
adhesives? - ANSWER-The overlap should be 10"




QUESTION: The main purpose of a base sheet is to provide: - ANSWER-A welding process




QUESTION: Why must kerosene kettles NOT burn at a low flame for a long time? - ANSWER-
Carbon will build up in the coils




QUESTION: What is the best protector of metal? - ANSWER-Red lead primer




QUESTION: What is a common requirement of asbestos, asphalt shingle, and slate roofs? -
ANSWER-Underlayment




QUESTION: What are rubber sheet, one-sided latex base, and Kraft paper used for? - ANSWER-
Vapor barrier




QUESTION: When setting up a ladder, how many feet per rung away from the wall should you
set the base of the ladder? - ANSWER-1 foot per 4 rungs


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QUESTION: When installing a shake roof over a comp roof, what must NOT be done? -
ANSWER-Remove valleys with flashing




QUESTION: Corners on felt are folded and cemented: - ANSWER-To prevent leaks




QUESTION: A raised delamination of roofing material usually caused by expansion of trapped
water vapor or other gases is called? - ANSWER-A blister




QUESTION: In a 6" star pattern, how many chalk lines are needed? - ANSWER-1




QUESTION: What is considered medium pitch for cold-process roofing? - ANSWER-1/2" per foot




QUESTION: To correctly prepare a single-ply roof over concrete, what is needed first? -
ANSWER-Solvent




QUESTION: For corrugated steel and aluminum roofing, what is the minimum headlap? -
ANSWER-6"




QUESTION: A gable (pitched) roof has a ridge 30ft long. It is 12 ft from the eave to the ridge.
What is the total square footage for the entire roof? - ANSWER-720 sq ft

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