Sample questions from all CSLB trade exams

235.5 cubic feet

How 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

Reject the load

How should a contractor proceed when a concrete load has arrived on a job site and the material comes out of the chute in lumps? A. Add water B. Add retardant C. Reject the load D. Place it immediately

Install sheeting between the tow layers

How should rigid insulation and shingles be installed on a pitched roof? A. Nail the shingles with straw nails B. Install insulation using tow-part adhesive C. Install sheeting between the tow layers D. Install two layers of heavy underlayemtn

Down the stairs

When installing carpet on stairs, in which direction should the pile point? A. Any direction B. Toward the left C. Up the stairs D. Down the stairs

Urethane

Which of the following hardwood surface finish would be best for kitchen floors A. Spar varnish B. Acrylic wax C. Low gloss varnish D. Urethane

Provide a ladder, ramp, or temporary stairs

For safety, what should be done when there is a break or change of elevation of 18" or more in a hallway floor? A. Postpone work until the stairway is constructed B. Provide a warning sign at least 8" x 10" C. Provide a ladder, ramp, or temporary stairs D. Provide caution tape barriers

Telephone over electrical conduit with a separation of at least 12" in between

What 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

Grind the hump down to level it

What procedure should be used when the contractor finds a hump in the concrete substrate? A. Install over it B. Use more adhesive C. Smooth the area with floor fill D. Grind the hump down to level it

Brad point

What sort of drill bit is best suited for drilling dowel holes? A. Twist B. Spade C. Forster D. Brad point

Welded

What type of cast iron fitting cannot be used on cast iron pipe? A. Flanged B. Mechanical C. Welded D. No hub

Blow off valve

What type of connection is used to flush a water line? A. Air release valve B. Blow off valve C. Post indicator valve D. Detector check valve

Vinyl fabric

What type of fence material is an example of fusion bonding based on ASTM class 2b standards? A. Aluminum fabric B. Vinyl fabric C. GAW fabric D. GBW fabric

RJ-45

What type of jack should be used on a Cat 6 cable installation? A. RJ-45 B. RJ-21 C. RJ-14 D. RJ-11

An approved carrier fitting

What type of wall fitting should a contractor use to install a wall-mounted water closet? A. A hubless closet ring B. An approved spud fitting C. An approved closet flange D. An approved carrier fitting

Seal the sill corners and screw holes

When assembling an aluminum patio door frame, how should the frame be sealed? A. the supplier assembles and seals the frame B. Seal around the frame after installation C. Seal the sill corners and screw holes D. Attach a nail-on flange at the sill to cover the floor base and the outside face for the sill.

Connected to the work area

When establishing a regulated work area, where should the decontamination area be located? A. As close to the wast hauling bin as possible B. As the nearest location to the project supervisor's office for oversight C. As close to a water source as possible D. Connected to the work area

Deck drainage and coping thickness

When establishing the elevation of a swimming pool bond beam on a residential pool, which of the following must be considered? A. Bond beam width and coping thickness B. Bond beam width and pool depth C. Deck drainage and coping thickness D. Deck drainage and pool depth

Lock

When fabricating a downspout with a cornice brake, what type of seam should be used? A. Butt B. Standing C. Lap D. Lock

K and L

When 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

When airborne exposure exceeds the TWA and excursion limits

When 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

Inform each of the employers about the asbestos work being performed

When 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.

The paving is cut outside the ditch line by a few inches

When 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 amps

When selecting a power supply for a job using four 0.75 amp electromagnetic locks, which is the best power supply? A. 0.75 amp B. 1.5 amps C. 2.0 amps D. 4.o amps

The lifting lines should be as vertical as possible

When 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

Shorten the stickout

When 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

In round columns

Where are spiral rebar ties used? A. In curved walls B. In grade beams C. In round columns D. In spiral staircase

Engineer's structural specifications

Where are the requirements for the completion of welding inspections typically found? A. Architectural cover pages B. Cal/OSHA C. California Building Code D. Engineer's structural specifications

Immediately outside the refrigeration room's exit

Where must the emergency control be installed for a refrigeration room? A. Immediately next to the exit door of the building B. Immediately outside the refrigeration room's exit C. Within 10 feet of the main control panel D. Within 25 feet of the main control panel

Site plan

Which drawing should be submitted to obtain a permit to install utility connections for a manufactured home on private property? A. Foundation plan B. Grading plan C. Set-up plan D. Site plan

Dogging assembly

Which item would prevent an exit device from being fire-rated? A. Plastic end caps B. Dogging assembly C. Surface - mounted vertical rods D. Rim cylinder

A high concentration of solids in the boiler water

Which of the following conditions would probably cause foaming? A. Turbulence in the water B. Sludge or sediment in the check valve C. A high concentration of liquids in the boiler chamber D. A high concentration of solids in the boiler water

Material that contains more than 1% asbestos

Which 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

Undue absorption of heat

Which of the following hazards is the greatest concern when storing gas cylinders? A. Vibration B. Electromagnetic static C. Extended freezing weather D. Undue absorption of heat

Pivot hinges

Which of the following is most important when considering using a heavy door in a storefront system? A. Lock system B. Door pull size C. Pivot hinges D. Door stops

The mud is too thick

Which of the following is the most likely to cause high joints? A. There is high humidity B. There is low humidity C. The mud is too thin D. The mud is too thick

Only the gravel/rock

Which of the following needs to be removed when installing spray foam (SPF) roofing over a built-up roof with aggregate? A. Only the air conditioning units B. Only the walk pads C. The entire roof system D. Only the gravel/rock

polyethylene pipe

Which of the following pipes is approved for underground gas lines? A. Schedule 40 CPVC pipe B. Polyethylene pipe C. Black iron pipe D. Galvanized pipe

The conductors may no pass through the interior of another building or structure

Which of the following regulations applies to service-entrance conductors that are supplying service to a building or structure? A. The conductors may no pass through the interior of another building or structure B. The conductors are permitted if the building or structures are close together C. The conductors are only permitted when approved construction drawings show the conductor routing D. The conductors are only permitted when service cannot be installed in any other way

Bolt hinge

Which of the following types of hinges has been designed for adjustment after installation of a wood gate? A. Bolt hinge B. Butt hinge C. Tee hinge D. Barrel hinge

Crackle-glazed

Which of the following types of tile requires sealing before grouting? A. Vitreous body B. Semi-matte C. Crackle-glazed D. Ceramic

Continuity plate

Which of the following would be the most commonly found in a moment connections? A. Base plate B. Cap plate C. Lintel brace D. Continuity plate

613 and US10B

Which pair of hardware finishes are the same? A. 605 and US5 B. 606 and US3 C. 613 and US10B D. 626 and US26

Pressure bar

Which part of a planner functions to hold down the stock and help prevent chatter? A. Bed roll B. Chipbreaker C. Sectional infeed roll D. Pressure bar

1/4'

Which screw has the greater shaft diameter? A. #6 B. 3/16" C. #10 D. 1/4'

Snaplock punch

Which tool is used to attach an end-cap on a 5" ogre rain gutter? A. Hand seamer B. Crimped C. Snaplock punch D. Caulk gun

A bristle brush

Which tool should be used to apply chemical strippers? A. A sponge roller B. A damp rag C. A wire brush D. A bristle brush

24 AWG solid

Which wire should be used to cross-connect a standard telephone connection? A. 18 AWG stranded B. 18 AWG solid C. 24 AWG stranded D. 24 AWG solid

Send it back in the delivery truck

While planning to pour a footing requiring six yards of concrete, the contractor overestimated the job by one yard. How should the contractor handle the excess material? A. Place it in a ditch deeper than 4' B. Send it back in the delivery truck C. Ask the general contractor for direction D. Wash the excess int a local street drain

10

How many cubic yards of concrete should a contractor order for a 20 ft wide x 40 ft long x 4 in thick slab? A. 8 B. 10 C. 12 D. 30

12'

What length of ceiling wire should be installed for a 10-foot suspended ceiling if the roof deck is a 20 feet? A. 20' B. 16' C. 12' D. 10'

$30580

A boiler project costs $35400 for materials, $7500 for testing, and $12700 for commissioning. What amount is due if the contractor has been paid for 45% of these expenses already? A. $25020 B. $30580 C. $48100 D. $55600

Circulating water

A chiller refrigerates which of the following? A. Circulating air B. Carbon dioxide C. Circulating water D. Nitrogen

$6,192

A contractor determines that a particular job will take three workers an 8 hour day to install 50 feet of retaining wall reinforcement. The labor cost is $43 per hour and the wall is 300 feet long. What is the total labor cost for the job? A. $1032 B. $2150 C. $6192 D. $12900

$18018

A contractor is bidding on a job for a 30' high, 60' x 100' metal building. It will be insulated with rigid board in both the ceiling and walls at a cost of $1.10/sq ft. How much should be budgeted for insulation costs, assuming 5% waste? A. $11088 B. $13860 C. $17160 D. $18018

$14380

A contractor is bidding to install a walk-in cooler and finds that the compressor costs $4600 and the piping is $5.76/foot for 200 feet of pipe. If this is 40% of the contract, what is the contract's total bid price? A. $5752 B. $9204 C. $10360 D. $14380

$1388.89

A contractor is excavating a pad that is 1500 square feet to a depth of 30 inches. The cost of excavation is $10/cubic yard. What is the total estimated cost of the excavation? A. $1250 B. $1388.89 C. $1666.67 D. $5000

20

A contractor is required to run 197 feet of EMT to the location of the sign. How many pieces of EMT will be required? A. 15 B. 19 C. 20 D. 25

$45.82

A contractor needs 13 receptacles that cost $3.56 each plus sales tax of 7.25%. The supplier states that for every 10 receptacles that are purchased, the contractor will get one free of charge. What is the total cost of the receptacles? A. $42.02 B. $42.72 C. $45.82 D. $49.66

18

A lite of glass, which is 42" x 62", has approximately how many square feet of glass? A. 2604 B. 208 C. 104 D. 18

Air-cooled condenser

A packaged water source heat pump eliminates which of the following components? A. Capacitor B. Evaporation C. Reversing valve D. Air-cooled condenser

Vertically from a line connecting the nosings

According dint the California Building Code, how is headroom clearance measured on a standard stairway? A. Vertically from the center of each tread B. Vertically from a line connecting the nosing C. From the bottom of and parallel to the first riser D. Perpendicularly from a line connecting the nosings

42"

According to Cal/OSHA, the top handrail around scaffolding should be at what minimum height? A. 36" B. 38" C. 42" D. 48"

8'

According to Caltrans Standard Specifications, what is the maximum distance allowed between interior vertical members on a chain-link gate? A. 2' B. 4' C. 6' D. 8'

36 inches

According to the California Residential Code, what is the minimum allowable width of a residential hallway? A. 44 inches B. 40 inches C. 36 inches D. 32 inches

Adhesive, moisture-proof tape

According to the Post-Tension Manual, which of the following should be used to repair tears in cable sheathing? A. Duct tape B. Adhesive, moisture-proof tape C. Spray-on epoxy D. Silicone

Aluminum

Alternating 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

1333 tons

An aggregate base weighing 1.5 tons per cubic yard will laid 12" deep on a 1000-foot road, 24 feet wide. How many tons of aggregate will be required? A. 889 tons B. 1333 tons C. 1999 tons D. 3999 tons

The voltage will decrese

As the temperature of a PV module increases, what will happen to the voltage? A. The voltage will increase B. The voltage will decrease C. The voltage will be unaffected D. It depends on the module design.

8 bags

Assuming that a bag of grout covers 75sq.ft, how many bags are needed for a 25' x 23' room? A. 6 bags B. 7 bags C. 8.bags D. 9 bags

Wet the ACM constantly throughout the project

During an indoor asbestos abatement project, which of the following would be the best method for ensuing that asbestos fibers do not become airborne? A. Conduct air monitoring constantly B. Wet the ACM constantly throughout the project C. Carefully place material into 6-mil double bags D. Apply negative air to the containment

50 cu yards

Excluding any shrinkage or compaction, approximately how much backfill material is required to fill the void left by removal of a 10000 gallon underground tank? A. 30 cu yards B. 40 cu yards C. 50 cu yards D. 60 cu yards

840 blocks

How many 4" x 4" blocks are needed to line a 20' seepage pit using 14 blocks per row? A. 4480 blocks B. 1040 blocks C. 840 blocks D. 320 blocks

10

How many 4' x 10' sheets of metal are needed to fabricate 300' of gutter with a stretch-out of 13"? A. 8 B. 10 C. 15 D. 20

640 sq.ft

How 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

728 sq ft

How many square feet of wallboard ware needed to cover both sides of a wall that is 26 feet long and 14 feet high? A. 364 sq ft B. 546 sq ft C. 728 sq ft D. 736 sq ft

188 sq. yds

How many square yards of plaster will be required to plaster fifteen 12' high round columns with a 3' diameter? A. 565 sq. Yds B. 240 sq. Yds C. 188 sq. Yds D. 113 sq. Yds

$10000

If a crane company charges $250 per hour of operation, how much will a crane cost for four days of 8 hours each day and one day of 4 hours, in addition to 4 hours of travel time? A. $32000 B. $10000 C. $8000 D. $4000

5

If a flat rectangular roof measures 16' x 31', how many squares of roof coverings are required? A. 5 B. 15 C. 25 D. 50

360 LF

If a gallon of striping paint covers 120 square feet, how many lineal feet of 4" wide striping will it cover? A. 30 LF B. 120 LF C. 360 LF D. 480 LF

18' 0"

If a n architectural drawing gives a scale of 1/8"= 1', what does a line 2-1/4" equal? A. 10' 6" B. 17' 6" C. 18' 0" D. 24' 8"

$112

If a quoted price for a framing lumber is $800 per thousand board feet, what would be the cost of nine 2" x 8" x 10' pieces and on 2" x 12" x 10' piece? A. $97 B. $107 C. $112 D. $118

35904 gallons

If a swimming pool is 20' x 30' and filled to a depth of 8', what is the volume of water to be solar heated? A. 600 cubic yards B. 4800 cubic yards C. 33600 gallons D. 35904 gallons

Postpone the move until it is less windy

If wind speed is so great that the structure being moved swerves from side to side, what actions should the contractor take? A. Add additional restraints before proceeding with he move B. Secure a police escort to facilitate the move C. Add extra transportation equipment to ensure continuity of the move D. Postpone the move until it is less windy

Douglas fir

If wood guardrails are required to be installed on a demolition job, the railing must be made of what kind of wood? A. Pine B. Redwood C. Ceda D. Douglas fir

Intermediate metal conduit or rigid conduit

In Class 1, Division 2 locations, such as gas stations or refineries, what type of conduit should be used above ground? A. Intermediate metal conduit or rigid conduit B. Electrical metallic tubing C. Electrical metallic tubing or flexible metallic tubing D. Polyvinyl chloride conduit

As soon as possible after the results have been received

Personal Ak sample results reveal levels exceeding the permissible exposure limit. When must the employer inform the affected employees? A. Within 10 days of receiving the results B. Within 30 days of receiving the results C. As soon as Cal/OSHA has been notified of the results D. As soon as possible after the results have been received

18"

Temperature relief valves must have what transitional length before PEX is used? A. 15" B. 18" C. 24" D. 36"

The spacing of the rafters

Three primary factors determine the size and the type of rafter to use in construction. Tow of there are the distance spanned and the weight supported. What is the third factor? A. The spacing of the rafters B. The spacing of joists C. The type of sheeting to be used D. The height of the wall

Basic knowledge of chemistry and the measurements used

To 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

2

Using a load factor of 50%, how many 10 yard dump truck loads are required to export 6" of paving removed from a 120" x 4' trench? A. 1 B. 2 C. 4 D. 6

$2560

What is the total charge for four 8-our days use of a backhoe, if the cost for rental is $400 per day and operator cost is $30 per hour? A. $3200 B. $2560 C. $1840 D. $1600

Ampere-hours

What is the unit of measurement for solar system battery capacity? A. Phase-hours B. Ampere-hours C. Watt amps D. Volt amps

84.78 cubic feet

What is the volume of a cylinder if the diameter equals 3 feet and the length equals 12 feet? A. 36 cubic feet B. 84.78 cubic feet C. 226.08 cubic feet D. 339.12 cubic feet

1/8"

WHat 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"

490 sq.ft

What area does 550 blocks of 8" x 8" x 16" CMU cover? A. 440 sq.ft B. 490 sq.ft C. 550 sq.ft D. 605 sq.ft

The drying time will increase

What effect will cold, damp days have on primers? A. The surface will become brittle B. The drying time will increase C. The top coat will discolor D. Fish eye will occur

It is more corrosion resistant

What is the advantage of using aluminum instead of sheet metal to fabricate channel letters? A. It is less costly B. It is easier to paint C. It is more corrosion resistant D. It is UL approved

1/8"

What is the allowable lippage between pavers? A. 1/2" B. 3/8" C. 1/4" D. 1/8"

Stud finder

What is the best tool to use to locate wood framing in a wall system for a retrofit insulation job? A. Plumb bob B. Stud finder C. Tape measure D. Rubber hammer

40 gpm

What is the flow rate in gallons per minute for a 14,000 gallon pool to turn over in six hours? A. 40 gpm B. 80 gpm C. 144 gpm D. 240 gpm

To remove calcium and magnasium

What 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

It is a safety device that confirms that existence of a pilot flame

What is the function of a thermocouple in a gas furnace? A. It is safety control for the fan B. It is a safety device that confirms that existence of a pilot flame C. It is a safety device for electronic ignition systems D. It is a safety device that controls the thermostat

10'

What is the maximum distance between joints in a concrete patio? A. 8' B. 10' C. 12' D. 14'

4.0 mg/L

What 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

36"

What is the minimum clear width of a single residential unit staircase? A. 24" B. 30" C. 36" D. 42"

2 opposite sides

What is the minimum number of sides of the perimeter skirting must have ventilation? A. All 4 sides B. 3 connected sides C. 2 connected sides D. 2 opposite sides

To avoid form collapse

What is the most important reason for someone to supervise the rate of pour when concrete is placed in high wall forms? A. To prevent rebar movement B. To ensure proper vibration C. To avoid cement pockets D. To avoid form collapse

Place the manufacturer's template onto the countertop and follow the insturctions

What is the proper procedure for installing a sink in a countertop? A. Sketch the perimeter of the sink and transfer the sketch to the countertop B. Trace the perimeter of the sink onto the countertop C. Cut the approximately sized sink home with a hole saw D. Place the manufacturer's template onto the countertop and follow the instructions

3-5 minutes

What is the recommended mixing time when using a mixer to prepare plastic Portland cement plaster for a brown coat? A. 1-2 minutes B. 3-5 minutes C. 18-24 minutes D. 25-30 minutes

36 sq. Ft

What is the square footage of a gable 12 ft. Wide by 6 ft. High? A. 24 sq.ft B. 36 sq.ft C. 42 sq.ft D. 72 sq.ft

Line to load of alternate adjacent phase

With the power on, what is the proper sequence when checking fuses on a 3-phase fused disconnect? A. Line to line of alternate adjacent phase B. Ground to load of alternate adjacent phase C. Line to ground of alternate adjacent phase D. Line to load of alternate adjacent phase