C-39 ROOFING TRADE PRACTICE TEST 1
WITH ALL CORRECT & VERIFIED ANSWERS
Composition flashing (base flashing) should be fastened with: Correct answer-One- inch solid cap-
head nails or
Nails driven theough tin disks
Pitch pockets or pitch boxes: Correct answer-Are not recommended because they require
extensive maintenance
Reinforced concrete can be used as a structural deck. Which of the following is a correct statement?
Correct answer-Some moisture will remain in concrete decks even after the surface is dry
Roofing insulation and membranes must be protected from latent moisture in concrete decks. In
northern climates, this is usually accomplished with: Correct answer-A vapor retarder or
A venting sheet
Steel decks should be at least _______ or heavier. Correct answer-22g
Insulation applied to steel roof decks before the roof membrane is installed should be applied:
Correct answer-In two separate layers where insulation thickness permits
The top flanges of a steel roof deck should be installed: Correct answer-Perpendicular to the roof
slope
The maximum deflection allowed for a steel deck is: Correct answer-1/4" per 100 feet
If the steel decks must be spot-welded to structural steel, puddle welds _______ or larger in
diameter are recommended. They should be made on washers and spaced at least _______ on
center. Correct answer-1/2 inches ... 12 inches
If thermosetting insulation is used over structural decks, the density should be: Correct answer-18
to 22 pounds per cubic foot
The correct density for thermosetting insulation is accomplished by: Correct answer-Compacting
Thermosetting insulation is compacted in two layers if the total thickness is greater than: Correct
answer-6 inches
Thermosetting insulative fills must be protected from latent moisture in roof decks. Which of the
following procedures is recommended? Correct answer-Install base-ply vapor barrier and
Install wood nailers at all perimeters and
Install wood nailers at all roof projections
What type of roof is recommended over thermosetting insulative fills Correct answer-Aggregate
, A span rating of _______ means that a plywood panel may be used for roof decking over supports
spaced 32 inches o.c. or for sub flooring over supports spaced 16 inches o.c. Correct answer-32/16
On plywood decks not covered with insulation, a base ply should be _______ to serve as as the base
ply of the roof membrane. Correct answer-Attached with annular-threaded nails
The choice of membrane type for a roof is frequently determined by: Correct answer-Geographical
location and
Climate
Technical information useful in the selection of roof membranes is provided by the: Correct
answer-National Bureau of Standards
On low-sloped roofs, felt should be laid _______ the flow of water, beginning at _______ points in
the deck. Correct answer-Perpendicular ... low
On slopes over 2 inches per foot, felt should be laid: Correct answer-Parallel to the slopes
For asphalt roofs, treated wood nailers should be installed perpendicular to the slope and on 20 -
foot centers for slopes up to: Correct answer-3 inches per foot
A roofing contractor discovers damage done by other trades to a newly installed roof. What should
the roofing contractor do? Correct answer-Submit a written report to the general contractor
and/or the owner for any visible damage
When layers of felt are joined by hot-mopping, the process is most similar to: Correct answer-
Welding
If final surfacing is not installed, roofing felts already installed should be: Correct answer-"Glazed"
and sealed at the end of each days work
The bending radius of compositional roofing materials is generally limited to: Correct answer-45
degrees
To allow for the bending radius of compositional roofing materials, all vertical surfaces must have:
Correct answer-Can't strips between the roof and the vertical surface
Pad-type compositional walk pads should be spaced no closer than: Correct answer-6 inches
For application between membrane plies, bitumen should be applied at a rate of approximately
_______ per 100 sq ft. Correct answer-15 to 35 pounds
What is the lowest slope allowed for a wood shake roof with 2 layers of 15 lb felt? Correct answer-
3:12
The proper nailing of three-tab asphalt shingles is: Correct answer-1" from the sides and 5/8"
above the slots
WITH ALL CORRECT & VERIFIED ANSWERS
Composition flashing (base flashing) should be fastened with: Correct answer-One- inch solid cap-
head nails or
Nails driven theough tin disks
Pitch pockets or pitch boxes: Correct answer-Are not recommended because they require
extensive maintenance
Reinforced concrete can be used as a structural deck. Which of the following is a correct statement?
Correct answer-Some moisture will remain in concrete decks even after the surface is dry
Roofing insulation and membranes must be protected from latent moisture in concrete decks. In
northern climates, this is usually accomplished with: Correct answer-A vapor retarder or
A venting sheet
Steel decks should be at least _______ or heavier. Correct answer-22g
Insulation applied to steel roof decks before the roof membrane is installed should be applied:
Correct answer-In two separate layers where insulation thickness permits
The top flanges of a steel roof deck should be installed: Correct answer-Perpendicular to the roof
slope
The maximum deflection allowed for a steel deck is: Correct answer-1/4" per 100 feet
If the steel decks must be spot-welded to structural steel, puddle welds _______ or larger in
diameter are recommended. They should be made on washers and spaced at least _______ on
center. Correct answer-1/2 inches ... 12 inches
If thermosetting insulation is used over structural decks, the density should be: Correct answer-18
to 22 pounds per cubic foot
The correct density for thermosetting insulation is accomplished by: Correct answer-Compacting
Thermosetting insulation is compacted in two layers if the total thickness is greater than: Correct
answer-6 inches
Thermosetting insulative fills must be protected from latent moisture in roof decks. Which of the
following procedures is recommended? Correct answer-Install base-ply vapor barrier and
Install wood nailers at all perimeters and
Install wood nailers at all roof projections
What type of roof is recommended over thermosetting insulative fills Correct answer-Aggregate
, A span rating of _______ means that a plywood panel may be used for roof decking over supports
spaced 32 inches o.c. or for sub flooring over supports spaced 16 inches o.c. Correct answer-32/16
On plywood decks not covered with insulation, a base ply should be _______ to serve as as the base
ply of the roof membrane. Correct answer-Attached with annular-threaded nails
The choice of membrane type for a roof is frequently determined by: Correct answer-Geographical
location and
Climate
Technical information useful in the selection of roof membranes is provided by the: Correct
answer-National Bureau of Standards
On low-sloped roofs, felt should be laid _______ the flow of water, beginning at _______ points in
the deck. Correct answer-Perpendicular ... low
On slopes over 2 inches per foot, felt should be laid: Correct answer-Parallel to the slopes
For asphalt roofs, treated wood nailers should be installed perpendicular to the slope and on 20 -
foot centers for slopes up to: Correct answer-3 inches per foot
A roofing contractor discovers damage done by other trades to a newly installed roof. What should
the roofing contractor do? Correct answer-Submit a written report to the general contractor
and/or the owner for any visible damage
When layers of felt are joined by hot-mopping, the process is most similar to: Correct answer-
Welding
If final surfacing is not installed, roofing felts already installed should be: Correct answer-"Glazed"
and sealed at the end of each days work
The bending radius of compositional roofing materials is generally limited to: Correct answer-45
degrees
To allow for the bending radius of compositional roofing materials, all vertical surfaces must have:
Correct answer-Can't strips between the roof and the vertical surface
Pad-type compositional walk pads should be spaced no closer than: Correct answer-6 inches
For application between membrane plies, bitumen should be applied at a rate of approximately
_______ per 100 sq ft. Correct answer-15 to 35 pounds
What is the lowest slope allowed for a wood shake roof with 2 layers of 15 lb felt? Correct answer-
3:12
The proper nailing of three-tab asphalt shingles is: Correct answer-1" from the sides and 5/8"
above the slots
