CSLB B LICENSE GENERAL CONTRACTOR EXAM
STUDY GUIDE – EXPERT VERIFIED ACTUAL
QUESTIONS & ANSWERS FOR GUARANTEED PASS ||
LATEST UPDATE 2025/26
If unused mortar stiffens due to hydration of cement, what must you do? -
CORRECTANSWER Discard the mortar
What minimum time must you wait before caulking or grouting new tiles? -
CORRECTANSWER 24-48 Hours
How long should you wait before installing tile on a shower pan? -CORRECTANSWER
24 Hours
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: -
CORRECTANSWER Type-B Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each
light? -CORRECTANSWER 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: -CORRECTANSWER 1:1 (45°)
A Pittsburgh joint is used in: -CORRECTANSWER HVAC ductwork
The drain for a pressure relief valve on a water heater should be extended to: -
CORRECTANSWER The outside of the building
What is the minimum slope toward the drain of a shower pan? -CORRECTANSWER
1/4" per foot (2%)
What is the diameter of #3 rebar? -CORRECTANSWER 3/8"
If a vendor fails to provide an MSDS, you have the right to call: -CORRECTANSWER
Cal/OSHA or DOSH
When installing a door jamb, you need shims at: -CORRECTANSWER 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 -CORRECTANSWER Epoxy cement
When do you need bracing for a drywall wall? -CORRECTANSWER Diagonal bracing is
needed every 25' for any drywall wall.
How should you clear the roots from a construction site? -CORRECTANSWER Clear
roots to 12" below grade.
Dividing watts by amps gives you: -CORRECTANSWER Volts
The most frequent on-the-job roofing accidents are: -CORRECTANSWER 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. -CORRECTANSWER Wood tile
Lightweight concrete is best used for:
A. Curb and Gutter
, B. Second floor decking
C. First floor slab on grade
D. Footings -CORRECTANSWER 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 -CORRECTANSWER 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 -CORRECTANSWER Copper
Where do you need a fire wall?
A. Between a living room and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
STUDY GUIDE – EXPERT VERIFIED ACTUAL
QUESTIONS & ANSWERS FOR GUARANTEED PASS ||
LATEST UPDATE 2025/26
If unused mortar stiffens due to hydration of cement, what must you do? -
CORRECTANSWER Discard the mortar
What minimum time must you wait before caulking or grouting new tiles? -
CORRECTANSWER 24-48 Hours
How long should you wait before installing tile on a shower pan? -CORRECTANSWER
24 Hours
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: -
CORRECTANSWER Type-B Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each
light? -CORRECTANSWER 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: -CORRECTANSWER 1:1 (45°)
A Pittsburgh joint is used in: -CORRECTANSWER HVAC ductwork
The drain for a pressure relief valve on a water heater should be extended to: -
CORRECTANSWER The outside of the building
What is the minimum slope toward the drain of a shower pan? -CORRECTANSWER
1/4" per foot (2%)
What is the diameter of #3 rebar? -CORRECTANSWER 3/8"
If a vendor fails to provide an MSDS, you have the right to call: -CORRECTANSWER
Cal/OSHA or DOSH
When installing a door jamb, you need shims at: -CORRECTANSWER 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 -CORRECTANSWER Epoxy cement
When do you need bracing for a drywall wall? -CORRECTANSWER Diagonal bracing is
needed every 25' for any drywall wall.
How should you clear the roots from a construction site? -CORRECTANSWER Clear
roots to 12" below grade.
Dividing watts by amps gives you: -CORRECTANSWER Volts
The most frequent on-the-job roofing accidents are: -CORRECTANSWER 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. -CORRECTANSWER Wood tile
Lightweight concrete is best used for:
A. Curb and Gutter
, B. Second floor decking
C. First floor slab on grade
D. Footings -CORRECTANSWER 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 -CORRECTANSWER 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 -CORRECTANSWER Copper
Where do you need a fire wall?
A. Between a living room and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
