NASCLA Exam ACTUAL UPDATED
Exam Questions and CORRECT Answers
The frame of scaffold shall be tied into the building or structure at a maximum of how many feet
vertically? - CORRECT ANSWER 26 feet
For asphalt roof slopes of 4:12 or greater, how many layers of underlayment are required? -
CORRECT ANSWER 1
What is the acceptable difference of air temperature from the supply and return in an HVAC
system? - CORRECT ANSWER 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? -
CORRECT ANSWER Curtain wall
What do contour lines on a topographical map that form a closed loop without hachures
represent? - CORRECT ANSWER 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? -
CORRECT ANSWER 2 hours
,The financial status of a company at any given time is shown by? - CORRECT
ANSWER Balance sheet
Large precast wall panels that are the full height of the building are often produced by what
method? - CORRECT ANSWER Tilt-up construction
When measured perpendicularly from the rear wall, what should the minimum depth of clearance
be around an accessible water closet? - CORRECT ANSWER 56 inches
Smoke control systems shall have: - CORRECT ANSWER 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? - CORRECT ANSWER 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? - CORRECT
ANSWER 0.024 inches
What is the correct way to store metal decking on a job site? - CORRECT ANSWER 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: - CORRECT
ANSWER 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: - CORRECT ANSWER At lease 4 inches
How thick is "heavy duty" steel decking? - CORRECT ANSWER 15/16", .017 - .040 thick
What does 3Ф represent? - CORRECT ANSWER 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? - CORRECT
ANSWER 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? - CORRECT ANSWER 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? - CORRECT ANSWER 7 inches
Where sidewalks bear against buildings and other fixed structures expansion joints should be
installed at a maximum of how many feet? - CORRECT ANSWER Maximum of 100 feet
Exam Questions and CORRECT Answers
The frame of scaffold shall be tied into the building or structure at a maximum of how many feet
vertically? - CORRECT ANSWER 26 feet
For asphalt roof slopes of 4:12 or greater, how many layers of underlayment are required? -
CORRECT ANSWER 1
What is the acceptable difference of air temperature from the supply and return in an HVAC
system? - CORRECT ANSWER 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? -
CORRECT ANSWER Curtain wall
What do contour lines on a topographical map that form a closed loop without hachures
represent? - CORRECT ANSWER 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? -
CORRECT ANSWER 2 hours
,The financial status of a company at any given time is shown by? - CORRECT
ANSWER Balance sheet
Large precast wall panels that are the full height of the building are often produced by what
method? - CORRECT ANSWER Tilt-up construction
When measured perpendicularly from the rear wall, what should the minimum depth of clearance
be around an accessible water closet? - CORRECT ANSWER 56 inches
Smoke control systems shall have: - CORRECT ANSWER 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? - CORRECT ANSWER 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? - CORRECT
ANSWER 0.024 inches
What is the correct way to store metal decking on a job site? - CORRECT ANSWER 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: - CORRECT
ANSWER 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: - CORRECT ANSWER At lease 4 inches
How thick is "heavy duty" steel decking? - CORRECT ANSWER 15/16", .017 - .040 thick
What does 3Ф represent? - CORRECT ANSWER 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? - CORRECT
ANSWER 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? - CORRECT ANSWER 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? - CORRECT ANSWER 7 inches
Where sidewalks bear against buildings and other fixed structures expansion joints should be
installed at a maximum of how many feet? - CORRECT ANSWER Maximum of 100 feet
