C9 Drywall Update Exam Questions and
Answers Graded A+
Where are you most likely to use mesh tape? - Correct answer-in areas of high
moisture
On metal framing, which direction do the Flanges face? - Correct answer-parallel
to the wall
What is the primary advantage of using a laminated wall system? - Correct answer-
reduced sound transmission
What is used for a typical residential 1 hour firewall? - Correct answer-one layer of
5/8" drywall
When installing interior wallboard, what nail procedure is most critical? - Correct
answer-using galvanized nails
For the 2nd coat of joint compound, use: - Correct answer-12" box
When cutting out for electrical boxes, where should you place the router? - Correct
answer-start in the middle, cut around the outside of the box
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, When should you apply primer? - Correct answer-after sanding is complete
When using screws to put up double ply wallboard, what is the maximum distance
between screws for the base ply? - Correct answer-24"
What level of taping has the highest quality of finish? - Correct answer-level 5
What is a hawk used for? - Correct answer-to hold joint compound
How should gas cylinders be stored? - Correct answer-valve end up
What grit sandpaper is most common to use to smooth a wall? - Correct answer-
150 Grit
When using ready mixed joint compound, you should: - Correct answer-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? - Correct answer-install with nails as called for in the plan
What is the minimum width of a corner bead flange? - Correct answer-1" x 1"
What is the safest when finished with a power tool? - Correct answer-wait until all
motion has stopped before leaving the machine
What do you do with materials if you are done with them? - Correct answer-move
them out the way to keep the area clean, uncluttered and safe
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Answers Graded A+
Where are you most likely to use mesh tape? - Correct answer-in areas of high
moisture
On metal framing, which direction do the Flanges face? - Correct answer-parallel
to the wall
What is the primary advantage of using a laminated wall system? - Correct answer-
reduced sound transmission
What is used for a typical residential 1 hour firewall? - Correct answer-one layer of
5/8" drywall
When installing interior wallboard, what nail procedure is most critical? - Correct
answer-using galvanized nails
For the 2nd coat of joint compound, use: - Correct answer-12" box
When cutting out for electrical boxes, where should you place the router? - Correct
answer-start in the middle, cut around the outside of the box
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, When should you apply primer? - Correct answer-after sanding is complete
When using screws to put up double ply wallboard, what is the maximum distance
between screws for the base ply? - Correct answer-24"
What level of taping has the highest quality of finish? - Correct answer-level 5
What is a hawk used for? - Correct answer-to hold joint compound
How should gas cylinders be stored? - Correct answer-valve end up
What grit sandpaper is most common to use to smooth a wall? - Correct answer-
150 Grit
When using ready mixed joint compound, you should: - Correct answer-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? - Correct answer-install with nails as called for in the plan
What is the minimum width of a corner bead flange? - Correct answer-1" x 1"
What is the safest when finished with a power tool? - Correct answer-wait until all
motion has stopped before leaving the machine
What do you do with materials if you are done with them? - Correct answer-move
them out the way to keep the area clean, uncluttered and safe
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
