CSLB B LICENSE GENERAL
CONTRACTOR EXAM QUESTIONS
WITH CORRECT
SOLUTIONS||UPDATED 2026/2027
SYLLABUS||100% GUARANTEED
PASS||<<LATEST VERSION>>
When screws are used instead of nails, the required spacing between screws is
usually: - ANSWER ✓ Screws usually allow for larger spacing between them than
nails because they are stronger.
In a commercial or publicly funded building, which is required when a handicap
sink is open underneath?
A. Surface no higher than 34"
B. Knee clearance of at least 30"
C. No sharp edges underneath
D. All of the above - ANSWER ✓ All of the above.
For a publicly funder or commercial building a handicap sink is required to have a
surface no higher than 34", knee clearance of at least 30", and no sharp edges.
Which of the following is a non-flammable adhesive?
A. Release-type adhesive
B. Alcohol-type adhesive
C. Contact-type adhesive
D. Padding cement - ANSWER ✓ Release-type adhesive is non-flammable.
A stairway's maximum total riser and tread dimension would be:
A. 1 riser + 2 treads = 22"
B. 2 risers + 1 tread = 25"
,C. 2 treads + 1 riser = 25"
D. Dependent on customer's request - ANSWER ✓ 2 risers + 1 tread = 25"
A curb and threshold are not necessary in a shower:
A. Where children use it
B. For drain water
C. When designed for wheel chair use
D. Curbs and thresholds are always required - ANSWER ✓ A curb and threshold
is not required when designed for wheel chair use.
If the elevation of point A is 92.6', and the transit reading at point A is 3.4', then
the elevation of the transit is: - ANSWER ✓ The elevation of the transit is 96'.
Which of the following need NOT be grounded?
A. Receptacle
B. Junction box
C. Light fixture
D. Thermostat - ANSWER ✓ A thermostat is low voltage and would not need to
be grounded.
Which formula would you use to determine the quantity of drywall needed for a
wall of a room?
A. Ceiling height + wall length
B. Ceiling height - wall length
C. Ceiling height x wall length
D. Ceiling height ÷ wall length - ANSWER ✓ Ceiling height x wall length.
When would you use a stepped foundation? - ANSWER ✓ A stepped foundation
would be used on a hillside or slope.
Of the following, which method is best for attaching residential floor tile to
particle-board sub flooring?
A. 1/4" staples
B. Powder-actuated nailer
C. 12d nails
,D. Adhesive - ANSWER ✓ Adhesive would be the best method for attaching
particle-board sub flooring to resident floor tile.
Handicap grab bars should be installed with:
A. Brackets and nails
B. Brackets and super glue
C. Brackets and screws
D. Brackets and anchor bolts - ANSWER ✓ Handicap grab bars should be
installed with brackets and screws.
Of the following which is the most dangerous effect of air bubbles in mortar?
A. Interrupts consistency of mortar
B. Weakens mortar strength
C. Changes texture
D. Changes the chemical composition - ANSWER ✓ Air bubbles in mortar will
weaken the strength.
What is required to be installed between the cold water supply and a water heater?
- ANSWER ✓ A shut off valve is required to be installed between the cold water
supply and the hot water heater.
The total of 1' 10-1/2" and 8-3/4" is: - ANSWER ✓ 2' 7 1/4"
The maximum allowable distance between a wall and a suspended masons
scaffold is? - ANSWER ✓ 6" is the maximum allowable distance between a wall
and a suspended masons scaffold.
When would a basement be included in the total allowable area calculation for a
building? - ANSWER ✓ The basement of a building will sometimes be included
in the total allowable area calculation.
What should you do after discovering asbestos on a job? - ANSWER ✓ Contact
the Chief of DOSH
The maximum allowable distance between a wall and heavy trades wooden pole
scaffolding is: - ANSWER ✓ 14" is the maximum allowable distance between a
wall and heavy wooden pole scaffolding.
, When must the contractor provide the warranty for a water heater to the property
owner? - ANSWER ✓ The contractor must provide the warranty for a water heater
to the property owner on completion of installation at the job site.
What type of solder is used to join a copper water pipe? - ANSWER ✓ Lead free
solder is used to join copper water pipes.
Who must approve all plumbing fixtures before they are used? - ANSWER ✓ A
local building official must approve all plumbing fixtures before they are used.
When a ready-mix concrete truck arrives at the job site, how do you verify that the
quantity and ratio of the concrete are correct? - ANSWER ✓ Ask the concrete
contractor.
An owner typically holds 10% retention from progress payments because? -
ANSWER ✓ As protection against mechanics liens.
The most important consideration in preparing a building site is? - ANSWER ✓
Drainage is the most important consideration in preparing a building site.
What is the minimum size lumber to use in constructing horse scaffolding 5 ft in
height? - ANSWER ✓ A horse scaffolding legs must be made of 2" x 4" lumber
and a ledger made of 2" x 6" lumber.
How long should tile set on an organic adhesive bed in order to cure? - ANSWER
✓ Tile should set on an organic adhesive bed for 24 hours to cure.
What is the maximum height in feet that you can build a retaining wall without
consulting a structural engineer? - ANSWER ✓ 3' is the highest you can build a
retaining wall without consulting a structural engineer.
What is the maximum height of a threshold for a door designed for disabled
access? - ANSWER ✓ 1/2" is the maximum height of a threshold for a door
designed for disabled access.
Of the following, concrete would be poured against:
CONTRACTOR EXAM QUESTIONS
WITH CORRECT
SOLUTIONS||UPDATED 2026/2027
SYLLABUS||100% GUARANTEED
PASS||<<LATEST VERSION>>
When screws are used instead of nails, the required spacing between screws is
usually: - ANSWER ✓ Screws usually allow for larger spacing between them than
nails because they are stronger.
In a commercial or publicly funded building, which is required when a handicap
sink is open underneath?
A. Surface no higher than 34"
B. Knee clearance of at least 30"
C. No sharp edges underneath
D. All of the above - ANSWER ✓ All of the above.
For a publicly funder or commercial building a handicap sink is required to have a
surface no higher than 34", knee clearance of at least 30", and no sharp edges.
Which of the following is a non-flammable adhesive?
A. Release-type adhesive
B. Alcohol-type adhesive
C. Contact-type adhesive
D. Padding cement - ANSWER ✓ Release-type adhesive is non-flammable.
A stairway's maximum total riser and tread dimension would be:
A. 1 riser + 2 treads = 22"
B. 2 risers + 1 tread = 25"
,C. 2 treads + 1 riser = 25"
D. Dependent on customer's request - ANSWER ✓ 2 risers + 1 tread = 25"
A curb and threshold are not necessary in a shower:
A. Where children use it
B. For drain water
C. When designed for wheel chair use
D. Curbs and thresholds are always required - ANSWER ✓ A curb and threshold
is not required when designed for wheel chair use.
If the elevation of point A is 92.6', and the transit reading at point A is 3.4', then
the elevation of the transit is: - ANSWER ✓ The elevation of the transit is 96'.
Which of the following need NOT be grounded?
A. Receptacle
B. Junction box
C. Light fixture
D. Thermostat - ANSWER ✓ A thermostat is low voltage and would not need to
be grounded.
Which formula would you use to determine the quantity of drywall needed for a
wall of a room?
A. Ceiling height + wall length
B. Ceiling height - wall length
C. Ceiling height x wall length
D. Ceiling height ÷ wall length - ANSWER ✓ Ceiling height x wall length.
When would you use a stepped foundation? - ANSWER ✓ A stepped foundation
would be used on a hillside or slope.
Of the following, which method is best for attaching residential floor tile to
particle-board sub flooring?
A. 1/4" staples
B. Powder-actuated nailer
C. 12d nails
,D. Adhesive - ANSWER ✓ Adhesive would be the best method for attaching
particle-board sub flooring to resident floor tile.
Handicap grab bars should be installed with:
A. Brackets and nails
B. Brackets and super glue
C. Brackets and screws
D. Brackets and anchor bolts - ANSWER ✓ Handicap grab bars should be
installed with brackets and screws.
Of the following which is the most dangerous effect of air bubbles in mortar?
A. Interrupts consistency of mortar
B. Weakens mortar strength
C. Changes texture
D. Changes the chemical composition - ANSWER ✓ Air bubbles in mortar will
weaken the strength.
What is required to be installed between the cold water supply and a water heater?
- ANSWER ✓ A shut off valve is required to be installed between the cold water
supply and the hot water heater.
The total of 1' 10-1/2" and 8-3/4" is: - ANSWER ✓ 2' 7 1/4"
The maximum allowable distance between a wall and a suspended masons
scaffold is? - ANSWER ✓ 6" is the maximum allowable distance between a wall
and a suspended masons scaffold.
When would a basement be included in the total allowable area calculation for a
building? - ANSWER ✓ The basement of a building will sometimes be included
in the total allowable area calculation.
What should you do after discovering asbestos on a job? - ANSWER ✓ Contact
the Chief of DOSH
The maximum allowable distance between a wall and heavy trades wooden pole
scaffolding is: - ANSWER ✓ 14" is the maximum allowable distance between a
wall and heavy wooden pole scaffolding.
, When must the contractor provide the warranty for a water heater to the property
owner? - ANSWER ✓ The contractor must provide the warranty for a water heater
to the property owner on completion of installation at the job site.
What type of solder is used to join a copper water pipe? - ANSWER ✓ Lead free
solder is used to join copper water pipes.
Who must approve all plumbing fixtures before they are used? - ANSWER ✓ A
local building official must approve all plumbing fixtures before they are used.
When a ready-mix concrete truck arrives at the job site, how do you verify that the
quantity and ratio of the concrete are correct? - ANSWER ✓ Ask the concrete
contractor.
An owner typically holds 10% retention from progress payments because? -
ANSWER ✓ As protection against mechanics liens.
The most important consideration in preparing a building site is? - ANSWER ✓
Drainage is the most important consideration in preparing a building site.
What is the minimum size lumber to use in constructing horse scaffolding 5 ft in
height? - ANSWER ✓ A horse scaffolding legs must be made of 2" x 4" lumber
and a ledger made of 2" x 6" lumber.
How long should tile set on an organic adhesive bed in order to cure? - ANSWER
✓ Tile should set on an organic adhesive bed for 24 hours to cure.
What is the maximum height in feet that you can build a retaining wall without
consulting a structural engineer? - ANSWER ✓ 3' is the highest you can build a
retaining wall without consulting a structural engineer.
What is the maximum height of a threshold for a door designed for disabled
access? - ANSWER ✓ 1/2" is the maximum height of a threshold for a door
designed for disabled access.
Of the following, concrete would be poured against:
