C-39 ROOFING TRADE PRACTICE
TEST 2 CORRECT 100%
An asphalt-modified roof is: - ANSWER Torch-applied
A roof has a 7' run and 8" per unit rise. What is the total rise at the ridge? - ANSWER
56"
Which of the following is NOT used as a weathering surface in single-ply roofing? -
ANSWER Mica
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
The maximum heating temperature for steep asphalt is: - ANSWER 525*F
What is the flash point of a coal-tar pitch kettle? - ANSWER 240-280*F
What is the name of the thick, black, gummy plastic used for making temporary repairs
to damp roof surfaces? - ANSWER Wetpatch
Where are sump drains usually installed? - ANSWER Wood decks
Which would be used to strengthen the eaves of a gable roof? - ANSWER Fascia
For spans less than 10ft, what is the minimum size lumber that may be used with a
roofing jack? - ANSWER 2" x 6"
Cal/OSHA may impose _______ concerning machinery. - ANSWER Fines and/or
restraining orders
Trusses should be spaced _______ apart for tile roofs. - ANSWER 2'-6"
Which of the following does not influence the exposure of wood shingles? - ANSWER
Type of sheathing
Which of the following is least hazardous to your health? - ANSWER Hypalon
What is NOT a requirement when you reroof over a built-up roof? - ANSWER The deck
must be torn up
Which of the following is not a correct statement about PVC sheet-laying adhesives? -
ANSWER The overlap should be 10"
, The main purpose of a base sheet is to provide: - ANSWER A welding process
Why must kerosene kettles NOT burn at a low flame for a long time? - ANSWER
Carbon will build up in the coils
What is the best protector of metal? - ANSWER Red lead primer
What is a common requirement of asbestos, asphalt shingle, and slate roofs? -
ANSWER Underlayment
What are rubber sheet, one-sided latex base, and Kraft paper used for? - ANSWER
Vapor barrier
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
When installing a shake roof over a comp roof, what must NOT be done? - ANSWER
Remove valleys with flashing
Corners on felt are folded and cemented: - ANSWER To prevent leaks
A raised delamination of roofing material usually caused by expansion of trapped water
vapor or other gases is called? - ANSWER A blister
In a 6" star pattern, how many chalk lines are needed? - ANSWER 1
What is considered medium pitch for cold-process roofing? - ANSWER 1/2" per foot
To correctly prepare a single-ply roof over concrete, what is needed first? - ANSWER
Solvent
For corrugated steel and aluminum roofing, what is the minimum headlap? - ANSWER
6"
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
A gable (pitched) roof has a ridge 28ft long. It is 13 ft from the eave to ridge what is the
total square footage for the entire roof? - ANSWER 728 sq ft
How many roofing squares of material would be needed for a roof with 728 sq ft? -
ANSWER 7 - 1/2
Which of the following structures requires a Class-A roof? - ANSWER A hospital
TEST 2 CORRECT 100%
An asphalt-modified roof is: - ANSWER Torch-applied
A roof has a 7' run and 8" per unit rise. What is the total rise at the ridge? - ANSWER
56"
Which of the following is NOT used as a weathering surface in single-ply roofing? -
ANSWER Mica
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
The maximum heating temperature for steep asphalt is: - ANSWER 525*F
What is the flash point of a coal-tar pitch kettle? - ANSWER 240-280*F
What is the name of the thick, black, gummy plastic used for making temporary repairs
to damp roof surfaces? - ANSWER Wetpatch
Where are sump drains usually installed? - ANSWER Wood decks
Which would be used to strengthen the eaves of a gable roof? - ANSWER Fascia
For spans less than 10ft, what is the minimum size lumber that may be used with a
roofing jack? - ANSWER 2" x 6"
Cal/OSHA may impose _______ concerning machinery. - ANSWER Fines and/or
restraining orders
Trusses should be spaced _______ apart for tile roofs. - ANSWER 2'-6"
Which of the following does not influence the exposure of wood shingles? - ANSWER
Type of sheathing
Which of the following is least hazardous to your health? - ANSWER Hypalon
What is NOT a requirement when you reroof over a built-up roof? - ANSWER The deck
must be torn up
Which of the following is not a correct statement about PVC sheet-laying adhesives? -
ANSWER The overlap should be 10"
, The main purpose of a base sheet is to provide: - ANSWER A welding process
Why must kerosene kettles NOT burn at a low flame for a long time? - ANSWER
Carbon will build up in the coils
What is the best protector of metal? - ANSWER Red lead primer
What is a common requirement of asbestos, asphalt shingle, and slate roofs? -
ANSWER Underlayment
What are rubber sheet, one-sided latex base, and Kraft paper used for? - ANSWER
Vapor barrier
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
When installing a shake roof over a comp roof, what must NOT be done? - ANSWER
Remove valleys with flashing
Corners on felt are folded and cemented: - ANSWER To prevent leaks
A raised delamination of roofing material usually caused by expansion of trapped water
vapor or other gases is called? - ANSWER A blister
In a 6" star pattern, how many chalk lines are needed? - ANSWER 1
What is considered medium pitch for cold-process roofing? - ANSWER 1/2" per foot
To correctly prepare a single-ply roof over concrete, what is needed first? - ANSWER
Solvent
For corrugated steel and aluminum roofing, what is the minimum headlap? - ANSWER
6"
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
A gable (pitched) roof has a ridge 28ft long. It is 13 ft from the eave to ridge what is the
total square footage for the entire roof? - ANSWER 728 sq ft
How many roofing squares of material would be needed for a roof with 728 sq ft? -
ANSWER 7 - 1/2
Which of the following structures requires a Class-A roof? - ANSWER A hospital
