Page |1
NASCLA Exam Questions and Correct
Answers/ Latest Update / Already Graded
lightweight, 5/8" that is up to 15% lighter than standard Type X
wallboard
Ans: Gysum Panel- Firecode Type X
What is an advantage of veneer plasters?
Ans: axwrtVeneer plaster is more durable
Least expensive stud for gypsum framing?
Ans: axwrt25 gauge steel studs
18 GAUGE TIES are used for what in gypsum framing?
Ans: axwrtTO ATTACH CHANNEL TO FURRED AREAS
Why USE SHORTER SHANK NAILS in framing with Gypsum?
Ans: axwrtTO PREVENT NAIL POPS
With gypsum wall framing, how should studs be installed?
Ans: axwrtALL STUDS SAME DIRECTION
All rights reserved © 2025/ 2026 |
, Page |2
How should resilient channels be installed with respect to
distance from floor and ceiling?
Ans: axwrtINSTALL RESILIENT CHANNELS 2" FROM FLOOR,
6" FROM CEILING
How should furring channels be installed?
Ans: axwrtPERPENDICULAR TO JOIST
What is the SPACING OF FURRING CHANNEL FASTENERS?
Ans: axwrt24" OC
Temperature of hanging drywall?
Ans: axwrtTEMPERATURE TO HANG DRYWALL SHOULD BE
MORE THAN 50 DEGREES, ACCLIMATED FOR 24 HOURS AT 55 -
70 DEGREES
What is the width of a gypsum control joint?
Ans: axwrtGYPSUM CONTROL JOINT WIDTH IS 1/2"
Job conditions of finishing veneer plaster?
Ans: axwrtGREATER THAN 55 DEGREES, HUMIDITY 20-50 %
THE SPACING OF FASTENERS FOR CORNER BEAD MUST NOT
BE MORE THAN....
All rights reserved © 2025/ 2026 |
, Page |3
Ans: axwrt12" OC
Storage Temperature of Gyspum...
Ans: axwrtAbove 55 degrees, products start to deteriorate at
125 degrees
When stacking gyspum, how far should the base of the stack be
from the wall?
Ans: axwrt4"-6" FROM WALL
When can a door be used as a wall control joint?
Ans: axwrtTHE DOOR MAY BE USED AS A WALL CONTROL
JOINT IF THE JOINT GOES FROM THE CORNER UP
Some purposes of roofing underlayment?
Ans: axwrtIt protects roof sheathing before the roof is applied,
and it gives added weather protection
What is used to keep water from getting inside the roof?
Ans: axwrtIce Dams
The membrane of an ice dam should be HOW MANY inches
inside the wall line?
Ans: axwrt24 inches inside the wall line
All rights reserved © 2025/ 2026 |
, Page |4
What is the term for flashing built into the vertical surface and
bent down over the base flashing
Ans: axwrtcounter flashing
What is the flashing built right up on the chimney and butts the
chimney and the shingles?
Ans: axwrtStep flashing
How much exposure should be given when roll roofing?
Ans: axwrt17 inches
How many pounds per square are required of vapor barriers on
built up roofs?
Ans: axwrt45 to 80 lbs per square
What are some purposes of aggregate on built up roofs?
Ans: axwrtProtects the underlying roof system from weather
and protects from damage caused by foot traffic
When installing rafters, how much air space should be left for
ventilation?
Ans: axwrt1 inch minimum
All rights reserved © 2025/ 2026 |
NASCLA Exam Questions and Correct
Answers/ Latest Update / Already Graded
lightweight, 5/8" that is up to 15% lighter than standard Type X
wallboard
Ans: Gysum Panel- Firecode Type X
What is an advantage of veneer plasters?
Ans: axwrtVeneer plaster is more durable
Least expensive stud for gypsum framing?
Ans: axwrt25 gauge steel studs
18 GAUGE TIES are used for what in gypsum framing?
Ans: axwrtTO ATTACH CHANNEL TO FURRED AREAS
Why USE SHORTER SHANK NAILS in framing with Gypsum?
Ans: axwrtTO PREVENT NAIL POPS
With gypsum wall framing, how should studs be installed?
Ans: axwrtALL STUDS SAME DIRECTION
All rights reserved © 2025/ 2026 |
, Page |2
How should resilient channels be installed with respect to
distance from floor and ceiling?
Ans: axwrtINSTALL RESILIENT CHANNELS 2" FROM FLOOR,
6" FROM CEILING
How should furring channels be installed?
Ans: axwrtPERPENDICULAR TO JOIST
What is the SPACING OF FURRING CHANNEL FASTENERS?
Ans: axwrt24" OC
Temperature of hanging drywall?
Ans: axwrtTEMPERATURE TO HANG DRYWALL SHOULD BE
MORE THAN 50 DEGREES, ACCLIMATED FOR 24 HOURS AT 55 -
70 DEGREES
What is the width of a gypsum control joint?
Ans: axwrtGYPSUM CONTROL JOINT WIDTH IS 1/2"
Job conditions of finishing veneer plaster?
Ans: axwrtGREATER THAN 55 DEGREES, HUMIDITY 20-50 %
THE SPACING OF FASTENERS FOR CORNER BEAD MUST NOT
BE MORE THAN....
All rights reserved © 2025/ 2026 |
, Page |3
Ans: axwrt12" OC
Storage Temperature of Gyspum...
Ans: axwrtAbove 55 degrees, products start to deteriorate at
125 degrees
When stacking gyspum, how far should the base of the stack be
from the wall?
Ans: axwrt4"-6" FROM WALL
When can a door be used as a wall control joint?
Ans: axwrtTHE DOOR MAY BE USED AS A WALL CONTROL
JOINT IF THE JOINT GOES FROM THE CORNER UP
Some purposes of roofing underlayment?
Ans: axwrtIt protects roof sheathing before the roof is applied,
and it gives added weather protection
What is used to keep water from getting inside the roof?
Ans: axwrtIce Dams
The membrane of an ice dam should be HOW MANY inches
inside the wall line?
Ans: axwrt24 inches inside the wall line
All rights reserved © 2025/ 2026 |
, Page |4
What is the term for flashing built into the vertical surface and
bent down over the base flashing
Ans: axwrtcounter flashing
What is the flashing built right up on the chimney and butts the
chimney and the shingles?
Ans: axwrtStep flashing
How much exposure should be given when roll roofing?
Ans: axwrt17 inches
How many pounds per square are required of vapor barriers on
built up roofs?
Ans: axwrt45 to 80 lbs per square
What are some purposes of aggregate on built up roofs?
Ans: axwrtProtects the underlying roof system from weather
and protects from damage caused by foot traffic
When installing rafters, how much air space should be left for
ventilation?
Ans: axwrt1 inch minimum
All rights reserved © 2025/ 2026 |
