C-39 ROOFING TRADE PRACTICE TEST 1
WITH ACTUAL QUESTIONS AND CORRECT
ACCURATE ANSWERS || LATEST 2025
ALREADY GRADED A+
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
WITH ACTUAL QUESTIONS AND CORRECT
ACCURATE ANSWERS || LATEST 2025
ALREADY GRADED A+
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
