CSLB B LICENSE GENERAL CONTRACTOR EXAM QUESTIONS AND
VERIFIED ANSWERS LATEST 2025-2026
Question 1
If unused mortar stiffens due to hydration of cement, what must you do?
Discard the mortar
Question 2
What minimum time must you wait before caulking or grouting new tiles?
24-48 Hours
Question 3
How long should you wait before installing tile on a shower pan?
24 Hours
Question 4
Unstable dry rock, angular gravel, sandy loam, and cohesive soils having compressive strengths greater
than 0.5 and less than 1.5 tons/sq ft (tsf), are typical examples of:
Type-B Soils
Question 5
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light?
35V
,In a series circuit, the total voltage is divided equally.
Question 6
For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is:
1:1 (45°)
Question 7
A Pittsburgh joint is used in:
HVAC ductwork
Question 8
The drain for a pressure relief valve on a water heater should be extended to:
The outside of the building
Question 9
What is the minimum slope toward the drain of a shower pan?
1/4" per foot (2%)
Question 10
What is the diameter of #3 rebar?
3/8"
Question 11
If a vendor fails to provide an MSDS, you have the right to call:
Cal/OSHA or DOSH
Question 12
When installing a door jamb, you need shims at:
,Both hinge and strike sides, three on each side.
Question 13
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue
Epoxy cement
Question 14
When do you need bracing for a drywall wall?
Diagonal bracing is needed every 25' for any drywall wall.
Question 15
How should you clear the roots from a construction site?
Clear roots to 12" below grade.
Question 16
Dividing watts by amps gives you:
Volts
Question 17
The most frequent on-the-job roofing accidents are:
Falls
Question 18
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.
Wood tile
Question 19
Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. First floor slab on grade
D. Footings
Second floor decking
Question 20
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
Spot Board
Question 21
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
VERIFIED ANSWERS LATEST 2025-2026
Question 1
If unused mortar stiffens due to hydration of cement, what must you do?
Discard the mortar
Question 2
What minimum time must you wait before caulking or grouting new tiles?
24-48 Hours
Question 3
How long should you wait before installing tile on a shower pan?
24 Hours
Question 4
Unstable dry rock, angular gravel, sandy loam, and cohesive soils having compressive strengths greater
than 0.5 and less than 1.5 tons/sq ft (tsf), are typical examples of:
Type-B Soils
Question 5
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light?
35V
,In a series circuit, the total voltage is divided equally.
Question 6
For safety reasons, the maximum simple slope of an excavation, up to 20 ft deep, in Type-B soil is:
1:1 (45°)
Question 7
A Pittsburgh joint is used in:
HVAC ductwork
Question 8
The drain for a pressure relief valve on a water heater should be extended to:
The outside of the building
Question 9
What is the minimum slope toward the drain of a shower pan?
1/4" per foot (2%)
Question 10
What is the diameter of #3 rebar?
3/8"
Question 11
If a vendor fails to provide an MSDS, you have the right to call:
Cal/OSHA or DOSH
Question 12
When installing a door jamb, you need shims at:
,Both hinge and strike sides, three on each side.
Question 13
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue
Epoxy cement
Question 14
When do you need bracing for a drywall wall?
Diagonal bracing is needed every 25' for any drywall wall.
Question 15
How should you clear the roots from a construction site?
Clear roots to 12" below grade.
Question 16
Dividing watts by amps gives you:
Volts
Question 17
The most frequent on-the-job roofing accidents are:
Falls
Question 18
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.
Wood tile
Question 19
Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. First floor slab on grade
D. Footings
Second floor decking
Question 20
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
Spot Board
Question 21
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
