Az ROC Trade Exam B-3 License Exam Question
and Answer (2026/2027) | Updated Questions
and Correct Answers | A+ Verified
• Nails used for installing Hardboard panel siding vertically must accommodate
the sheathing and penetrate the framing a minimum of how much? -✓✓ 1-1/2
inches
• When framing openings in floors with a header and trimmer joists, what
maximum header joist span is allowed with a single member header? -✓✓ 4 feet
• Above the handrail and below the head, what is the minimum clear opening on
a stairwell? -✓✓ 36 inches
• When installing vinyl siding, how much overlap should you allow for thermal
expansion? -✓✓ 1 inch
• What is the first step you should take when applying specialty finishes? -✓✓
Read the manufacturers use instructions.
• What is the appropriate gap between gypsum board and a tub surround? -✓✓
1/4 inch
• Sprayed fire resistant materials are identified by ____________ and thickness
required for a given rating. -✓✓ Density.
,• What is the most important factor in determining the "R" value of blown in
insulation? -✓✓ Density.
• Refer to the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), What are the lengths of the second floor trusses? -✓✓
30 feet 6 inches and 13 feet 5 inches.
• Refer tot the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), what is the height of the foyer in inches? -✓✓ inches.
• A ____________ is a system component that receives the inputs from
automatic and manual fire alarm devices and may be capable of supplying power
to the detection devices and transponders or off-premises transmitters. -✓✓ Fire
Alarm Control Unit.
• On graded sites, the top of any exterior foundation shall extend above the
elevation of: -✓✓ The street gutter at point of discharge.
• What is the thickness of a footing for a single story frame residence? -✓✓ 6
inches.
• Which of the following is the most important when deciding the depth of a
footing? -✓✓ Depth of the frost line.
• Refer tot the illustration of a 2 story house w/ lap siding plans, (available at the
testing center) How many acres is the site for the house plan? -✓✓ 1/3 acre.
,• Which of the following can be used as backfill outside a foundation without
being compacted? -✓✓ Controlled low strength material.
• For soils classified as sandy gravel, foundation pressure shall not exceed how
many PSI? -✓✓ 3000 Pounds per Square Foot.
• Which of the following shall not be assumed to have a load bearing capacity for
foundations? -✓✓ Organic Silt
• The soil report states that the soil is sandy-gravel. What is the soil's load-bearing
value? -✓✓ 3,000 PSF
• According to code, what is the minimum required width of a footing in soil rated
at 2000 PSF for a single story building with 8 inch thick masonry walls? -✓✓ 12
inches
• What is the minimum footing width of a one story light-frame construction
building? -✓✓ 12 inches
• Which of the following would cause crazing (superficial cracking) on the surface
of concrete? -✓✓ Early drying due to late curing or excessive water on surface.
• Refer to the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), How many cubic yards of concrete is needed for the
floor and garage slabs less the fireplace area? -✓✓ 23 cubic yards.
, • According to code, the minimum thickness of a concrete slab that is supported
directly on the ground shall be ___________ inches. -✓✓ 3.5
• According to the code, plain concrete for basement walls and foundations shall
be what minimum compressive strength (psi)? -✓✓ 2500 psi
• the frost line is 24 inches below the surface. What is the required depth of a
footing? -✓✓ Below the frost line.
• A lot shall be graded to drain surface water away from foundation walls for a
minimum of ___________ feet. -✓✓ 10
• What is the minimum overlap of a vapor barrier in an unvented crawl space. -
✓✓ 6 inches
• The minimum dept of footings below the undisturbed ground surface shall
be_______. -✓✓ 12 inches
• According to code, footings shall be stepped when? -✓✓ If the ground surface
slopes more than on unit vertical to ten units horizontal or where necessary to
change the top footing surface elevation.
• What is the minimum concrete psi that is required for basement walls or slabs
not exposed to weather? -✓✓ 2500 psi
and Answer (2026/2027) | Updated Questions
and Correct Answers | A+ Verified
• Nails used for installing Hardboard panel siding vertically must accommodate
the sheathing and penetrate the framing a minimum of how much? -✓✓ 1-1/2
inches
• When framing openings in floors with a header and trimmer joists, what
maximum header joist span is allowed with a single member header? -✓✓ 4 feet
• Above the handrail and below the head, what is the minimum clear opening on
a stairwell? -✓✓ 36 inches
• When installing vinyl siding, how much overlap should you allow for thermal
expansion? -✓✓ 1 inch
• What is the first step you should take when applying specialty finishes? -✓✓
Read the manufacturers use instructions.
• What is the appropriate gap between gypsum board and a tub surround? -✓✓
1/4 inch
• Sprayed fire resistant materials are identified by ____________ and thickness
required for a given rating. -✓✓ Density.
,• What is the most important factor in determining the "R" value of blown in
insulation? -✓✓ Density.
• Refer to the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), What are the lengths of the second floor trusses? -✓✓
30 feet 6 inches and 13 feet 5 inches.
• Refer tot the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), what is the height of the foyer in inches? -✓✓ inches.
• A ____________ is a system component that receives the inputs from
automatic and manual fire alarm devices and may be capable of supplying power
to the detection devices and transponders or off-premises transmitters. -✓✓ Fire
Alarm Control Unit.
• On graded sites, the top of any exterior foundation shall extend above the
elevation of: -✓✓ The street gutter at point of discharge.
• What is the thickness of a footing for a single story frame residence? -✓✓ 6
inches.
• Which of the following is the most important when deciding the depth of a
footing? -✓✓ Depth of the frost line.
• Refer tot the illustration of a 2 story house w/ lap siding plans, (available at the
testing center) How many acres is the site for the house plan? -✓✓ 1/3 acre.
,• Which of the following can be used as backfill outside a foundation without
being compacted? -✓✓ Controlled low strength material.
• For soils classified as sandy gravel, foundation pressure shall not exceed how
many PSI? -✓✓ 3000 Pounds per Square Foot.
• Which of the following shall not be assumed to have a load bearing capacity for
foundations? -✓✓ Organic Silt
• The soil report states that the soil is sandy-gravel. What is the soil's load-bearing
value? -✓✓ 3,000 PSF
• According to code, what is the minimum required width of a footing in soil rated
at 2000 PSF for a single story building with 8 inch thick masonry walls? -✓✓ 12
inches
• What is the minimum footing width of a one story light-frame construction
building? -✓✓ 12 inches
• Which of the following would cause crazing (superficial cracking) on the surface
of concrete? -✓✓ Early drying due to late curing or excessive water on surface.
• Refer to the illustration of a 2 story house w/ lap siding plans, (complete set of
plans at the test center), How many cubic yards of concrete is needed for the
floor and garage slabs less the fireplace area? -✓✓ 23 cubic yards.
, • According to code, the minimum thickness of a concrete slab that is supported
directly on the ground shall be ___________ inches. -✓✓ 3.5
• According to the code, plain concrete for basement walls and foundations shall
be what minimum compressive strength (psi)? -✓✓ 2500 psi
• the frost line is 24 inches below the surface. What is the required depth of a
footing? -✓✓ Below the frost line.
• A lot shall be graded to drain surface water away from foundation walls for a
minimum of ___________ feet. -✓✓ 10
• What is the minimum overlap of a vapor barrier in an unvented crawl space. -
✓✓ 6 inches
• The minimum dept of footings below the undisturbed ground surface shall
be_______. -✓✓ 12 inches
• According to code, footings shall be stepped when? -✓✓ If the ground surface
slopes more than on unit vertical to ten units horizontal or where necessary to
change the top footing surface elevation.
• What is the minimum concrete psi that is required for basement walls or slabs
not exposed to weather? -✓✓ 2500 psi
