Answers 100% Pass
The Purpose of gravel on a built up tar and gravel roof is_________.
a. to prevent delamination of the plys
b. to protect the membrane from ultraviolet rays
c. to provide ballast to help hold down the roof membrane
d. all of the above. - ✔✔D. All of the above
a roof that has a problem with ponding generally still has water on it at least ____
hours after it has rained.
a. 12
b. 2
c. 24
d. 48 - ✔✔D. 48
The purpose of a cant strip is to _________.
a. prevent the roof membrane from cracking at a change in direction
b. provide a curb on which to set a skylight
c. replace a reflet as the counter-flashing
d. seal the top of a parapet counter flashing. - ✔✔a. prevent the roof membrane from
cracking at a change in direction
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,All of the following are common problems with built up roofing EXCEPT ________.
a. alligatoring
b. blistering
c. oil-canning
d. ridging - ✔✔c. oil-canning
A 4 in 12 slope can be expressed as the ratio of __________.
a. 1/4
b. 12:4
c. 4:12
d. 6:2:4 - ✔✔c. 4:12
A low slope can lead to problems with all of the following types of roof covering
materials, EXCEPT
a. asphalt shingles
b. fiber cement shingles
c. roll roofing
d. wood shakes
e. wood shingles - ✔✔c. roll roofing
The material having the shortest life expectancy is __________.
a. concrete
b. fiber cement
c. roll roofing
d. slate
e. wood - ✔✔c. roll roofing
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,Ice dams typically form on roofs with ____________.
a. a low slope and small overhang
b. a low slope and wide overhang
c. a steep slope and small overhang
d. a steep slope and wide overhang
e. asphalt shingles - ✔✔b. a low slope and wide overhang
The minimum slope for asphalt shingles in a conventional roofing application is
______.
a. 2:12
b. 4:12
c. 5:12
d. 6:12 - ✔✔a. 2:12
Common failure modes for asphalt shingles include all of the following, except
__________.
a. cracking blisters
b. cupping or clawing
c. loss of granules
d. spalling - ✔✔d. spalling
A four-year-old asphalt shingle roof that appears well-insulated, with an attic that is
properly ventilated, but having roughly 25% of the shingles showing irregular
cracks in the surface should be reported as ____________.
a. a common cosmetic condition that does not affect performance or life expectancy
b. being the result of excessive foot traffic on the roof
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, c. being the result of expansion and contraction of the waferboard sheathing due to
changes in humidity
d. freeze-thaw damage
e. possibly having manufacturing defects and a shortened life expectancy - ✔✔e.
possibly having manufacturing defects and a shortened life expectancy
There may be leakage at a chimney protruding through roll roofing valley flashing
because the ___________.
a. chimney height may be insufficient
b. chimney will obstruct proper drainage
c. nails from the chimney flashing have penetrated the valley flashing
d. roofer may not have cut the points at the valley
e. roofer used roll roofing rather than metal flashing - ✔✔b. chimney will obstruct
proper drainage
Foundation walls ____________.
a. must resist lateral pressure from the basement's sides
b. should be totally underground
c. support the structure and connect to the footing
d. vary inversely in thickness based on underground depth - ✔✔c. support the
structure and connect to the footing
Wall cracks develop because __________.
a. the wall has been overloaded
b. the wall has heaved
c. the wall has settled
d. all of the above - ✔✔d. all of the above
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