NASCLA ACTUAL EXAM QUESTIONS AND ANSWERS
(VERIFIED AND WELL DETAILED ANSWERS) LATEST
UPDATE 2025/2026
The frame of scaffold shall be tied into the building or structure at a maximum of
how many feet vertically? - ..(answers).26 feet
For asphalt roof slopes of 4:12 or greater, how many layers of underlayment are
required? - ..(answers).1
What is the acceptable difference of air temperature from the supply and return
in an HVAC system? - ..(answers).Between 15 and 20 degrees Fahrenheit (8-11
degrees Celsius).
This difference, also known as the "delta T," indicates the effectiveness of the
cooling or heating process.
What are masonry exterior non-load bearing walls that are not wholly supported
at each story? - ..(answers).Curtain wall
What do contour lines on a topographical map that form a closed loop without
hachures represent? - ..(answers).Hill
Depending on whether they are drawn with or without hachures (short,
perpendicular lines inside the loop). Hills are indicated by closed loops without
hachures, where the innermost loop represents the highest point of the hill.
,Depressions, on the other hand, are shown by closed loops with hachures, and
the innermost hachured loop indicates the lowest point of the depression.
What is the minimum fire-resistance rating for an elevator shaft wall that is 5
stories in height? - ..(answers).2 hours
The financial status of a company at any given time is shown by? -
..(answers).Balance sheet
Large precast wall panels that are the full height of the building are often
produced by what method? - ..(answers).Tilt-up construction
When measured perpendicularly from the rear wall, what should the minimum
depth of clearance be around an accessible water closet? - ..(answers).56 inches
Smoke control systems shall have: - ..(answers).Smoke control systems should
effectively control smoke movement, maintain usable egress routes, and restrict
smoke spread. They should activate immediately upon receiving an activation
command, and their components should operate within specific timeframes.
Smoke control systems also require proper maintenance, testing, and
documentation
What CAN be used for fire blocking between floors? - ..(answers).2x lumber,
plywood, OSB, drywall, mineral wool, and glass fiber batt insulation.
,Loose-fill insulation material, insulating foam sealants and caulk materials shall
NOT be used as a fireblock unless specifically tested
What is the minimum thickness of aluminum used for open valleys? -
..(answers).0.024 inches
What is the correct way to store metal decking on a job site? - ..(answers).Keep
bundles elevated off the ground, preferably on pallets or ties, with one end higher
for drainage.
Cover bundles with tarps or waterproof materials, ensuring good ventilation, and
consider securing them with straps to prevent movement. Avoid long-term
storage on the ground and keep them away from roads to prevent damage from
road spray.
Cement plaster over exterior wall studs requires galvanized weep screed with a: -
..(answers).Cement plaster over exterior wall studs requires a weep screed with a
minimum vertical attachment flange of 3 1/2 inches (89 mm). This weep screed
should be a corrosion-resistant, galvanized sheet with a minimum thickness of
0.019 inches (0.48 mm), also known as No. 26 galvanized sheet gage.
Adjacent combustible members entering into a concrete or masonry fire wall
from opposite sides shall have a separation of: - ..(answers).At lease 4 inches
How thick is "heavy duty" steel decking? - ..(answers).15/16", .017 - .040 thick
, What does 3Ф represent? - ..(answers).Three-phase electric power.
This is a type of alternating current (AC) system that uses three wires to transmit
electricity, making it a common method used in electrical grids worldwide
What is the best method for hauling dirt over a long distance? - ..(answers).Using
a self-loading scraper or a loader and truck
As an exception to the rule, what are the size limitations (in inches) for a van's
parking aisle and adjacent access aisle? - ..(answers).96 inches wide if the
adjacent access aisle is also 96 inches wide.
Standard van parking space dimensions (132 inches wide)
A fully opened door shall not reduce the required means of egress by more than
how many inches? - ..(answers).7 inches
Where sidewalks bear against buildings and other fixed structures expansion
joints should be installed at a maximum of how many feet? -
..(answers).Maximum of 100 feet
Handrail height shall be uniform in height and shall be how far above the finished
surface below? - ..(answers).Between 34 and 38 inches
(VERIFIED AND WELL DETAILED ANSWERS) LATEST
UPDATE 2025/2026
The frame of scaffold shall be tied into the building or structure at a maximum of
how many feet vertically? - ..(answers).26 feet
For asphalt roof slopes of 4:12 or greater, how many layers of underlayment are
required? - ..(answers).1
What is the acceptable difference of air temperature from the supply and return
in an HVAC system? - ..(answers).Between 15 and 20 degrees Fahrenheit (8-11
degrees Celsius).
This difference, also known as the "delta T," indicates the effectiveness of the
cooling or heating process.
What are masonry exterior non-load bearing walls that are not wholly supported
at each story? - ..(answers).Curtain wall
What do contour lines on a topographical map that form a closed loop without
hachures represent? - ..(answers).Hill
Depending on whether they are drawn with or without hachures (short,
perpendicular lines inside the loop). Hills are indicated by closed loops without
hachures, where the innermost loop represents the highest point of the hill.
,Depressions, on the other hand, are shown by closed loops with hachures, and
the innermost hachured loop indicates the lowest point of the depression.
What is the minimum fire-resistance rating for an elevator shaft wall that is 5
stories in height? - ..(answers).2 hours
The financial status of a company at any given time is shown by? -
..(answers).Balance sheet
Large precast wall panels that are the full height of the building are often
produced by what method? - ..(answers).Tilt-up construction
When measured perpendicularly from the rear wall, what should the minimum
depth of clearance be around an accessible water closet? - ..(answers).56 inches
Smoke control systems shall have: - ..(answers).Smoke control systems should
effectively control smoke movement, maintain usable egress routes, and restrict
smoke spread. They should activate immediately upon receiving an activation
command, and their components should operate within specific timeframes.
Smoke control systems also require proper maintenance, testing, and
documentation
What CAN be used for fire blocking between floors? - ..(answers).2x lumber,
plywood, OSB, drywall, mineral wool, and glass fiber batt insulation.
,Loose-fill insulation material, insulating foam sealants and caulk materials shall
NOT be used as a fireblock unless specifically tested
What is the minimum thickness of aluminum used for open valleys? -
..(answers).0.024 inches
What is the correct way to store metal decking on a job site? - ..(answers).Keep
bundles elevated off the ground, preferably on pallets or ties, with one end higher
for drainage.
Cover bundles with tarps or waterproof materials, ensuring good ventilation, and
consider securing them with straps to prevent movement. Avoid long-term
storage on the ground and keep them away from roads to prevent damage from
road spray.
Cement plaster over exterior wall studs requires galvanized weep screed with a: -
..(answers).Cement plaster over exterior wall studs requires a weep screed with a
minimum vertical attachment flange of 3 1/2 inches (89 mm). This weep screed
should be a corrosion-resistant, galvanized sheet with a minimum thickness of
0.019 inches (0.48 mm), also known as No. 26 galvanized sheet gage.
Adjacent combustible members entering into a concrete or masonry fire wall
from opposite sides shall have a separation of: - ..(answers).At lease 4 inches
How thick is "heavy duty" steel decking? - ..(answers).15/16", .017 - .040 thick
, What does 3Ф represent? - ..(answers).Three-phase electric power.
This is a type of alternating current (AC) system that uses three wires to transmit
electricity, making it a common method used in electrical grids worldwide
What is the best method for hauling dirt over a long distance? - ..(answers).Using
a self-loading scraper or a loader and truck
As an exception to the rule, what are the size limitations (in inches) for a van's
parking aisle and adjacent access aisle? - ..(answers).96 inches wide if the
adjacent access aisle is also 96 inches wide.
Standard van parking space dimensions (132 inches wide)
A fully opened door shall not reduce the required means of egress by more than
how many inches? - ..(answers).7 inches
Where sidewalks bear against buildings and other fixed structures expansion
joints should be installed at a maximum of how many feet? -
..(answers).Maximum of 100 feet
Handrail height shall be uniform in height and shall be how far above the finished
surface below? - ..(answers).Between 34 and 38 inches
