CSLB B LICENSE GENERAL CONTRACTOR
EXAM Questions and Answers Updated
2026/2027 Version | Verified Answers
1. 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.
2. 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.
3. 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"
4. 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.
5. 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'.
6. 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.
7. 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.
8. When would you use a stepped foundation? - ANSWER ✅ A stepped
foundation would be used on a hillside or slope.
9. 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.
10.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.
11.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.
12.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.
13.The total of 1' 10-1/2" and 8-3/4" is: - ANSWER ✅ 2' 7 1/4"
14.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.
15.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.
16.What should you do after discovering asbestos on a job? - ANSWER ✅
Contact the Chief of DOSH
17.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.
18.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.
EXAM Questions and Answers Updated
2026/2027 Version | Verified Answers
1. 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.
2. 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.
3. 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"
4. 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.
5. 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'.
6. 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.
7. 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.
8. When would you use a stepped foundation? - ANSWER ✅ A stepped
foundation would be used on a hillside or slope.
9. 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.
10.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.
11.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.
12.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.
13.The total of 1' 10-1/2" and 8-3/4" is: - ANSWER ✅ 2' 7 1/4"
14.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.
15.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.
16.What should you do after discovering asbestos on a job? - ANSWER ✅
Contact the Chief of DOSH
17.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.
18.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.
