CSLB B LICENSE GENERAL
CONTRACTOR 2025-2026 EXAM QUESTIONS
WITH 100% CORRECT ANSWERS
If unused mortar stiffens due to hydration of cement, what must you do? - CORRECT ANSWER -
Discard the mortar
What minimum time must you wait before caulking or grouting new tiles? - CORRECT ANSWER -24-48 Hours
How longPshould you wait before installing tile on a shower pan? - CORRECT ANSWER -24 Hours
Unstable dry rock, angular gravel, sandy loam, and cohesive soils having compressive strengths greater t
han 0.5 and less than 1.5 tons/sq ft (tsf), are typical examples of: - CORRECT ANSWER -Type-B Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light? -
CORRECT ANSWER -35V
In a series circuit, the total voltage is divided equally.
For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is: -
CORRECT ANSWER -1:1 (45°)
APPittsburgh joint is used in: - CORRECT ANSWER -HVAC ductwork
The drain for a pressurePrelief valve on a water heater should be extended to: - CORRECT
ANSWER -The outside of the building
What is the minimum slope toward the drain of a shower pan? - CORRECT ANSWER -1/4" per foot (2%)
What is the diameter of #3 rebar? - CORRECT ANSWER -3/8"
,If a vendor fails to provide an MSDS, you have the right to call: - CORRECT ANSWER -Cal/OSHA or DOSH
When installing a door jamb, you need shims at: - CORRECT
ANSWER - Both hinge and strike sides, three on each side.
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue - CORRECT ANSWER -Epoxy cement
When do you need bracing for a drywall wall? - CORRECT ANSWER
-Diagonal bracing is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - CORRECT
ANSWER -Clear roots to 12" below grade.
Dividing watts by amps gives you: - CORRECT ANSWER -Volts
The most frequent on-the-job roofing accidents are: - CORRECT ANSWER -Falls
Which of the following is NOT a type of wood block flooring?
A. Parquet
B. Wood Mosaic
C. Wood Tile
D. All of the above. - CORRECT ANSWER -Wood tile
,Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. FirstPfloor slab on grade
D. Footings - CORRECT ANSWER -Second floor decking
The tool used to carry grout needed to patch a small hole is a:
A. Hawk
B. Poling board
C. Spot board
D. Mason's scutch - CORRECT ANSWER -Spot Board
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
B. Schedule 40 ABS DWV
C. Extra strength vitrified clay
D. Copper - CORRECT ANSWER - Copper
Where do you need a fire wall?
A. Between a livingProom and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
D. A separation wall between a dwelling and an attachment - CORRECT
ANSWER -A separation wall between a dwelling and an attachment.
, What is the minimum clearance between rough ground and untreated subfloor joists? - CORRECT
ANSWER -18 inches
Who may remove asbestos? - CORRECT ANSWER -Contractor with Asbestos Certification on license.
Which of the following is NOT likely to be found in significant proportions in granular soil?
A. Gravel
B. Sand
C. Silt
D. Clay - CORRECT ANSWER -Clay
Stiles and rails are used on which of the following?
A. Furred walls
B. Roofs
C. Windows
D. Slabs - CORRECT ANSWER -Windows.
A stile is the vertical edges of the window and the railsPare the bottom and top.
What does a high slump test indicate? - CORRECT ANSWER -Too much water.
Metal concrete forms should be?
A. Oiled
B. Watered
C. Placed against gravel
D. Discarded after each use - CORRECT ANSWER -Oiled
CONTRACTOR 2025-2026 EXAM QUESTIONS
WITH 100% CORRECT ANSWERS
If unused mortar stiffens due to hydration of cement, what must you do? - CORRECT ANSWER -
Discard the mortar
What minimum time must you wait before caulking or grouting new tiles? - CORRECT ANSWER -24-48 Hours
How longPshould you wait before installing tile on a shower pan? - CORRECT ANSWER -24 Hours
Unstable dry rock, angular gravel, sandy loam, and cohesive soils having compressive strengths greater t
han 0.5 and less than 1.5 tons/sq ft (tsf), are typical examples of: - CORRECT ANSWER -Type-B Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light? -
CORRECT ANSWER -35V
In a series circuit, the total voltage is divided equally.
For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is: -
CORRECT ANSWER -1:1 (45°)
APPittsburgh joint is used in: - CORRECT ANSWER -HVAC ductwork
The drain for a pressurePrelief valve on a water heater should be extended to: - CORRECT
ANSWER -The outside of the building
What is the minimum slope toward the drain of a shower pan? - CORRECT ANSWER -1/4" per foot (2%)
What is the diameter of #3 rebar? - CORRECT ANSWER -3/8"
,If a vendor fails to provide an MSDS, you have the right to call: - CORRECT ANSWER -Cal/OSHA or DOSH
When installing a door jamb, you need shims at: - CORRECT
ANSWER - Both hinge and strike sides, three on each side.
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue - CORRECT ANSWER -Epoxy cement
When do you need bracing for a drywall wall? - CORRECT ANSWER
-Diagonal bracing is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - CORRECT
ANSWER -Clear roots to 12" below grade.
Dividing watts by amps gives you: - CORRECT ANSWER -Volts
The most frequent on-the-job roofing accidents are: - CORRECT ANSWER -Falls
Which of the following is NOT a type of wood block flooring?
A. Parquet
B. Wood Mosaic
C. Wood Tile
D. All of the above. - CORRECT ANSWER -Wood tile
,Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. FirstPfloor slab on grade
D. Footings - CORRECT ANSWER -Second floor decking
The tool used to carry grout needed to patch a small hole is a:
A. Hawk
B. Poling board
C. Spot board
D. Mason's scutch - CORRECT ANSWER -Spot Board
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
B. Schedule 40 ABS DWV
C. Extra strength vitrified clay
D. Copper - CORRECT ANSWER - Copper
Where do you need a fire wall?
A. Between a livingProom and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
D. A separation wall between a dwelling and an attachment - CORRECT
ANSWER -A separation wall between a dwelling and an attachment.
, What is the minimum clearance between rough ground and untreated subfloor joists? - CORRECT
ANSWER -18 inches
Who may remove asbestos? - CORRECT ANSWER -Contractor with Asbestos Certification on license.
Which of the following is NOT likely to be found in significant proportions in granular soil?
A. Gravel
B. Sand
C. Silt
D. Clay - CORRECT ANSWER -Clay
Stiles and rails are used on which of the following?
A. Furred walls
B. Roofs
C. Windows
D. Slabs - CORRECT ANSWER -Windows.
A stile is the vertical edges of the window and the railsPare the bottom and top.
What does a high slump test indicate? - CORRECT ANSWER -Too much water.
Metal concrete forms should be?
A. Oiled
B. Watered
C. Placed against gravel
D. Discarded after each use - CORRECT ANSWER -Oiled
