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C9 Drywall Update Questions and
Answers Latest 2026
Where are you most likely to use mesh tape? Ans: in
areas of high moisture
On metal framing, which direction do the Flanges face?
Ans: parallel to the wall
What is the primary advantage of using a laminated wall
system? Ans: reduced sound transmission
What is used for a typical residential 1 hour firewall?
Ans: one layer of 5/8" drywall
When installing interior wallboard, what nail procedure is
most critical? Ans: using galvanized nails
For the 2nd coat of joint compound, use: Ans: 12" box
When cutting out for electrical boxes, where should you
place the router? Ans: start in the middle, cut around the
outside of the box
When should you apply primer? Ans: after sanding is
complete
When using screws to put up double ply wallboard, what
is the maximum distance between screws for the base
ply? Ans: 24"
© 2025 All rights reserved
, 2 | Page
What level of taping has the highest quality of finish?
Ans: level 5
What is a hawk used for? Ans: to hold joint compound
How should gas cylinders be stored? Ans: valve end up
What grit sandpaper is most common to use to smooth a
wall? Ans: 150 Grit
When using ready mixed joint compound, you should:
Ans: add enough water for application
What should you do if the plans call for wallboard to be
installed by nailing over an existing plaster wall? Ans:
install with nails as called for in the plan
What is the minimum width of a corner bead flange? Ans:
1" x 1"
What is the safest when finished with a power tool? Ans:
wait until all motion has stopped before leaving the
machine
What do you do with materials if you are done with
them? Ans: move them out the way to keep the area
clean, uncluttered and safe
What does ADA Compliant refer to? Ans: contractors
followed Americans with Disabilities Act codes and
requirements
© 2025 All rights reserved
C9 Drywall Update Questions and
Answers Latest 2026
Where are you most likely to use mesh tape? Ans: in
areas of high moisture
On metal framing, which direction do the Flanges face?
Ans: parallel to the wall
What is the primary advantage of using a laminated wall
system? Ans: reduced sound transmission
What is used for a typical residential 1 hour firewall?
Ans: one layer of 5/8" drywall
When installing interior wallboard, what nail procedure is
most critical? Ans: using galvanized nails
For the 2nd coat of joint compound, use: Ans: 12" box
When cutting out for electrical boxes, where should you
place the router? Ans: start in the middle, cut around the
outside of the box
When should you apply primer? Ans: after sanding is
complete
When using screws to put up double ply wallboard, what
is the maximum distance between screws for the base
ply? Ans: 24"
© 2025 All rights reserved
, 2 | Page
What level of taping has the highest quality of finish?
Ans: level 5
What is a hawk used for? Ans: to hold joint compound
How should gas cylinders be stored? Ans: valve end up
What grit sandpaper is most common to use to smooth a
wall? Ans: 150 Grit
When using ready mixed joint compound, you should:
Ans: add enough water for application
What should you do if the plans call for wallboard to be
installed by nailing over an existing plaster wall? Ans:
install with nails as called for in the plan
What is the minimum width of a corner bead flange? Ans:
1" x 1"
What is the safest when finished with a power tool? Ans:
wait until all motion has stopped before leaving the
machine
What do you do with materials if you are done with
them? Ans: move them out the way to keep the area
clean, uncluttered and safe
What does ADA Compliant refer to? Ans: contractors
followed Americans with Disabilities Act codes and
requirements
© 2025 All rights reserved
