CSLB Trade Exams – Sample Questions from All
Trades (2025/2026 Latest Update) |
Contractor License Exam Prep Q&A PDF
The lifting lines should be as vertical as possible - correct answerWhen using a crane to
lift a 12,000-gallon tank out of the excavation, what is the preferable position of the
rigging lines attached to the tank's lifting eyes?
A. One lifting line should be horizontal
B. The lifting lines should be as far apart as possibles
C. The lifting lines should be as horizontal as possible
D. The lifting lines should be as vertical as possible
Material that contains more than 1% asbestos - correct answerWhich of the following
describes surfacing ACM?
A. Material that contains more than 1% asbestos
B. Material that contains more than 0.1% asbestos
C. Material that contains more than 0.01% asbestos
D. Material that contains more than 0.001% asbestos
Inform each of the employers about the asbestos work being performed - correct
answerWhen removing asbestos as a multi-employer work site, the asbestos abatement
contractor must do which of the following?
A. Ensure that all other employers leave the site
B. Inform the local Cal/OSHA office within 48 hours
C. Ensure that all asbestos is removed
D. Inform each of the employers about the asbestos work being performed.
When airborne exposure exceeds the TWA and excursion limits - correct answerWhen
must a contractor provide and require the use of protective clothing?
A. When Class II work requires removal of ACM exceeding 10 square feet
B. When airborne exposure exceeds the TWA and excursion limits
C. When Class II work requires removal of TSI exceeding 25 linear feet
D. When a negative exposure assessment is produced
Aluminum - correct answerAlternating current would most likely be used in GTAW to
weld which of the following metals?
A. Low carbon steel
,B. Deoxidized copper
C. Aluminum
D. Stainless steel
1/8" - correct answerWHat is the minimum thickness of steel that is covered by the AWS
D1.1 Structural Steel welding code?
A. 1/8"
B. 1/4"
C. 5/16"
D. 3/8"
Shorten the stickout - correct answerWhen welding with FCAW, how can the operator
control excess spatter?
A. Change the drag angle
B. Run stringer beads.
C. Shorten the stickout
D. Lengthen the stickout
Basic knowledge of chemistry and the measurements used - correct answerTo read and
properly interpret laboratory analysis reports as they apply to hazardous sites, a
contractor should have which of the following?
A. The phone number of a contract a the lead agency
B. Basic knowledge of math
C. A contract at Cal/OSHA
D. Basic knowledge of chemistry and the measurements used
235.5 cubic feet - correct answerHow much material will it take to fill up three round
holes drilled into the ground 25 feet deep and 2 feet in diameter?
A. 235.5 cubic feet
B. 180.5 cubic feet
C. 150.2 cubic feet
D. 100.7 cubic feet
Telephone over electrical conduit with a separation of at least 12" in between - correct
answerWhat method should be used to install electrical and telephone conduit in the
same trench?
A. Electrical over telephone conduit with a concrete barrier and 4" between them
B. Electrical over telephone conduit with a separation of at least 12" in between
C. Telephone over electrical conduit secured together every 12"
D. Telephone over electrical conduit with a separation of at least 12" in between
, The paving is cut outside the ditch line by a few inches - correct answerWhen replacing
pavement over a trench, what is meant by "overcutting"?
A. All wide spots and bell holes are cut square before paving
B. Paving is reinstalled one inch thicker than what was removed
C. The trench is base-paved and capped later
D. The paving is cut outside the ditch line by a few inches
4.0 mg/L - correct answerWhat is the maximum fluoride level permitted in drinking
water?
A. 2.0 mg/L
B. 4.0 mg/L
C. 6.0 mg/L
D. 8.0 mg/L
K and L - correct answerWhen installing hard copper piping underground, what types of
piping should a contractor use?
A. K and L
B. K and M
C. L and M
D. M and DWV
To remove calcium and magnasium - correct answerWhat is the function of a cation
exchange unit?
A. To oxidize iron fro the water
B. To remove calcium and magnesium
C. To reduce dissolved solids
D. To increase pH
640 sq.ft - correct answerHow many square feet of the tile are needed for an area that
measures 2-1/2" by 4" on a plan that is drawn to an 1/8" scale?
A. 10 sq.ft
B. 160 sq.ft
C. 576 sq.ft
D. 640 sq.ft
Crackle-glazed - correct answerWhich of the following types of tile requires sealing
before grouting?
A. Vitreous body
B. Semi-matte
C. Crackle-glazed
Trades (2025/2026 Latest Update) |
Contractor License Exam Prep Q&A PDF
The lifting lines should be as vertical as possible - correct answerWhen using a crane to
lift a 12,000-gallon tank out of the excavation, what is the preferable position of the
rigging lines attached to the tank's lifting eyes?
A. One lifting line should be horizontal
B. The lifting lines should be as far apart as possibles
C. The lifting lines should be as horizontal as possible
D. The lifting lines should be as vertical as possible
Material that contains more than 1% asbestos - correct answerWhich of the following
describes surfacing ACM?
A. Material that contains more than 1% asbestos
B. Material that contains more than 0.1% asbestos
C. Material that contains more than 0.01% asbestos
D. Material that contains more than 0.001% asbestos
Inform each of the employers about the asbestos work being performed - correct
answerWhen removing asbestos as a multi-employer work site, the asbestos abatement
contractor must do which of the following?
A. Ensure that all other employers leave the site
B. Inform the local Cal/OSHA office within 48 hours
C. Ensure that all asbestos is removed
D. Inform each of the employers about the asbestos work being performed.
When airborne exposure exceeds the TWA and excursion limits - correct answerWhen
must a contractor provide and require the use of protective clothing?
A. When Class II work requires removal of ACM exceeding 10 square feet
B. When airborne exposure exceeds the TWA and excursion limits
C. When Class II work requires removal of TSI exceeding 25 linear feet
D. When a negative exposure assessment is produced
Aluminum - correct answerAlternating current would most likely be used in GTAW to
weld which of the following metals?
A. Low carbon steel
,B. Deoxidized copper
C. Aluminum
D. Stainless steel
1/8" - correct answerWHat is the minimum thickness of steel that is covered by the AWS
D1.1 Structural Steel welding code?
A. 1/8"
B. 1/4"
C. 5/16"
D. 3/8"
Shorten the stickout - correct answerWhen welding with FCAW, how can the operator
control excess spatter?
A. Change the drag angle
B. Run stringer beads.
C. Shorten the stickout
D. Lengthen the stickout
Basic knowledge of chemistry and the measurements used - correct answerTo read and
properly interpret laboratory analysis reports as they apply to hazardous sites, a
contractor should have which of the following?
A. The phone number of a contract a the lead agency
B. Basic knowledge of math
C. A contract at Cal/OSHA
D. Basic knowledge of chemistry and the measurements used
235.5 cubic feet - correct answerHow much material will it take to fill up three round
holes drilled into the ground 25 feet deep and 2 feet in diameter?
A. 235.5 cubic feet
B. 180.5 cubic feet
C. 150.2 cubic feet
D. 100.7 cubic feet
Telephone over electrical conduit with a separation of at least 12" in between - correct
answerWhat method should be used to install electrical and telephone conduit in the
same trench?
A. Electrical over telephone conduit with a concrete barrier and 4" between them
B. Electrical over telephone conduit with a separation of at least 12" in between
C. Telephone over electrical conduit secured together every 12"
D. Telephone over electrical conduit with a separation of at least 12" in between
, The paving is cut outside the ditch line by a few inches - correct answerWhen replacing
pavement over a trench, what is meant by "overcutting"?
A. All wide spots and bell holes are cut square before paving
B. Paving is reinstalled one inch thicker than what was removed
C. The trench is base-paved and capped later
D. The paving is cut outside the ditch line by a few inches
4.0 mg/L - correct answerWhat is the maximum fluoride level permitted in drinking
water?
A. 2.0 mg/L
B. 4.0 mg/L
C. 6.0 mg/L
D. 8.0 mg/L
K and L - correct answerWhen installing hard copper piping underground, what types of
piping should a contractor use?
A. K and L
B. K and M
C. L and M
D. M and DWV
To remove calcium and magnasium - correct answerWhat is the function of a cation
exchange unit?
A. To oxidize iron fro the water
B. To remove calcium and magnesium
C. To reduce dissolved solids
D. To increase pH
640 sq.ft - correct answerHow many square feet of the tile are needed for an area that
measures 2-1/2" by 4" on a plan that is drawn to an 1/8" scale?
A. 10 sq.ft
B. 160 sq.ft
C. 576 sq.ft
D. 640 sq.ft
Crackle-glazed - correct answerWhich of the following types of tile requires sealing
before grouting?
A. Vitreous body
B. Semi-matte
C. Crackle-glazed
