CSLB C-21 Building Moving and Demolition (Trade Exam) — All Questions

In a building move, what is cribbing used for?

• a.Stacked blocking that holds the raised structure in position✓
• b.A tool for measuring the level of the beams under the structure
• c.A trailer axle assembly used under the load for the trip
• d.A coating applied to the beams to prevent rust during storage

Cribbing is temporary stacked blocking that supports the structure at each stage of a lift, so the load is not left on jacks alone. Cribbing is a support, not a coating. It is not a measuring tool. Axles belong to the transport equipment, not the cribbing.CSLB 16 CCR §832.21 classification text; CSLB 13E-21 (03-2026)

A job generates 52 tons of debris, and each truck is allowed to carry 13 tons. How many trips are needed?

• a.3 trips
• b.39 trips
• c.5 trips
• d.4 trips✓

52 ÷ 13 = 4 exactly, so 4 trips carry it all. Five trips adds a trip the division does not need. Three trips would leave 13 tons behind. Thirty-nine subtracts 13 from 52.CSLB 13E-21 (03-2026), computation questions

Which item must be removed before walls are pulled over?

• a.Roof cornices and other ornamental stonework✓
• b.Interior partition framing on the upper floors of the building
• c.Window glass on the ground floor and the lower stories
• d.Electrical conduit and junction boxes inside the walls

Roof cornices and other ornamental stonework shall be removed before pulling walls over. Glass is a separate matter under another rule. Partition framing is not named in this rule. Conduit is not the named item.29 CFR 1926.859(f)

A building 40 feet high will be demolished with its nearest part 8 feet from the lot line. What does the table require?

• a.A barrier and covered walkway, since 8 feet is under one-fourth the height✓
• b.A barrier, since the distance is over 5 feet from the lot line
• c.No protection, since the distance is over 5 feet from the lot line
• d.Construction railings, since the distance is under 10 feet from the lot line

One-fourth of 40 feet is 10 feet, and 8 feet is within that, so the barrier and covered walkway are required. A barrier alone applies beyond one-fourth of the height. Railings are for work 8 feet high or less. The 5-foot test is the first test, and the height fractions then apply.2025 CBC Table 3306.1

A paved area measures 450 square feet. How many square yards is that?

• a.50 square yards✓
• b.1,350 square yards
• c.150 square yards
• d.4,050 square yards

450 ÷ 9 = 50 square yards. One hundred fifty divides by 3. Four thousand fifty multiplies by 9. One thousand three hundred fifty multiplies by 3.CSLB 13E-21 (03-2026), computation questions

Which activities does Section 105.1 of the Building Code name as requiring a permit?

• a.Constructing, enlarging, altering, repairing, moving or demolishing a building, or changing its use✓
• b.Constructing and enlarging, since moving and demolition are separate approvals under local ordinance
• c.Moving and demolishing, since all other work is inspected without a permit
• d.Altering and repairing, since new structures are approved under zoning law alone

The section lists construct, enlarge, alter, repair, move, demolish and change of occupancy. Moving and demolishing are named in the same list. New construction is named in the list. The list includes the other activities too.2025 CBC §105.1

An excavator is charged at $145 per hour for 22 hours, plus a one-time mobilization charge of $600. What is the equipment cost?

• a.$3,190
• b.$3,790✓
• c.$767
• d.$3,335

145 × 22 = $3,190, and adding the $600 mobilization gives $3,790. Thirty-one ninety leaves out the mobilization. Thirty-three thirty-five adds the $145 once more. Seven sixty-seven divides the hours by the rate.CSLB 13E-21 (03-2026), computation questions

Mechanical equipment is used to push debris toward openings in an upper floor. What does Cal/OSHA require at the openings?

• a.Curbs or stop-logs to stop equipment from running over the edge✓
• b.No action, because operators are trained to stay clear of the edges
• c.Caution tape strung across each opening, with a sign at the stairs
• d.A spotter who stands at the edge of each opening and signals

Where mechanical equipment is used, floor openings shall have curbs or stop-logs. Tape is not a curb or stop-log. A spotter at the edge is exposed to the very hazard involved. The rule requires physical protection, not reliance on training.Cal. Code Regs., tit. 8, §1735(v)

Electricity and water are needed on the site during demolition for dust control and lighting. What does Cal/OSHA require of those utility lines?

• a.They are shut off and the crew works from portable generators
• b.They are relocated or rearranged as necessary and protected from physical damage✓
• c.They stay as they are, since the rule excuses utilities that are in use
• d.They are protected when the demolition reaches the second floor

If utility use is necessary, the services shall be relocated or rearranged as necessary and protected from physical damage. The exception requires relocation and protection, not nothing. The rule allows needed service to continue when protected. Protection is needed throughout the work, not just at one floor.Cal. Code Regs., tit. 8, §1735(a)

Under Business and Professions Code section 7058.5 as CSLB publishes it, when does a contractor need a C-22 classification or an asbestos certification to do asbestos-related work?

• a.When the work involves 100 square feet or more of surface area of asbestos containing materials✓
• b.When the project cost is more than $25,000 on a single contract
• c.When the work involves more than 1,000 square feet of surface area
• d.When the work involves a small amount of asbestos

A contractor shall not do asbestos-related work involving 100 square feet or more of ACM surface area unless it holds a C-22 classification or the qualifier passed the asbestos certification examination. Small amounts below 100 square feet are not covered by the section's trigger. The trigger is 100, not 1,000. Cost is not the test.B&P Code §7058.5

A building 40 feet high will be demolished with its nearest part 25 feet from the lot line. What does the table require?

• a.A barrier and a covered walkway, because 25 feet is over 5 feet
• b.Construction railings, because the lot line is within 30 feet
• c.No protection, because 25 feet exceeds one-half of the height✓
• d.A barrier, because the building is more than 8 feet high

One-half of 40 feet is 20 feet, and a distance beyond that needs no protection. A barrier is for distances up to one-half of the height. The walkway applies only up to one-fourth of the height. Railings apply only to work 8 feet high or less.2025 CBC Table 3306.1

What is the minimum height of construction railings used to direct pedestrians around a work area?

• a.8 feet
• b.42 inches✓
• c.30 inches
• d.36 inches

Construction railings shall be not less than 42 inches high. Thirty-six inches is below the minimum. Eight feet is the barrier height. Thirty inches is below the minimum.2025 CBC §3306.4

A pedestrian walkway at a demolition site extends into the street. What does Chapter 33 require?

• a.A second walkway on the opposite side of the street, fenced off
• b.A speed bump at the start of the walkway, with a posted limit
• c.A flagger stationed at each end of the walkway during working hours
• d.A directional barricade that steers traffic away from the path✓

Where the walkway extends into the street, a directional barricade sized to direct vehicles away from the path is required. A flagger is not the code's stated protection for the walkway. The section does not require a second walkway. A speed bump is not a directional barricade.2025 CBC §3306.3

Which of these is excepted from the Cal/OSHA permit requirements of the permit section?

• a.A city, county or state agency doing the work✓
• b.An employer with fewer than ten workers on the job
• c.A contractor holding a C-21 license in good standing
• d.A contractor working for a city on a public project

The exceptions include government bodies: the United States, the State, counties, cities and districts. A private contractor on public work is not itself a government body. A license in good standing does not create an exception. Crew size is not an exception.Cal. Code Regs., tit. 8, §341(e)(1)

A small loader backs where workers are on foot and the operator cannot see behind it. Which measure is a Cal/OSHA option for such a vehicle?

• a.A spotter or flagger in clear view of the operator✓
• b.A rear mirror with no other precaution at the back
• c.An instruction to workers to stay at least 3 feet away
• d.A horn sounded once before the first backing movement

Administrative controls include a spotter or flagger in clear view of the operator who directs the backing operation. A mirror alone is not on the rule's list. A distance instruction is not on the list. A single horn blast is not a backing control.Cal. Code Regs., tit. 8, §1592(b)

A written structural survey exists, but there is no hazardous materials survey. What does that mean for the job?

• a.Both questions are answered, since one survey covers framing and materials
• b.Neither is answered, since both need a separate laboratory report before work starts
• c.Structure is addressed, but hazardous materials remain an open question✓
• d.Both questions are answered if the building is less than 36 feet high

The structural survey addresses collapse risk; it does not identify hazardous materials, which is a separate question. A structural survey does not identify asbestos, lead or chemicals. The written structural survey does address collapse risk, so the structure question is answered. Height does not merge the two surveys.Cal. Code Regs., tit. 8, §1734(b); 29 CFR 1926.850(a)

A notice was filed for 200 linear feet of asbestos, and the survey now finds 250 linear feet. What does the federal rule say?

• a.The amount is updated at the end of the job in the final report
• b.No update is needed unless the amount changes by more than 50 percent
• c.It must be updated, because the change is 20 percent or more✓
• d.No update is needed, because the amount is below 260 linear feet

The notice must be updated as necessary, including when the amount changes by at least 20 percent; 200 to 250 is a 25 percent increase. The 260-foot threshold is not the update test. The update trigger is a change of 20 percent or more, not 50 percent. Updates are made as necessary, not held to the end of the job.40 CFR 61.145(b)(2)

A survey reports 150 linear feet of asbestos pipe insulation and 100 square feet of asbestos on other components in a building to be demolished. How do these amounts compare with the federal thresholds?

• a.Both are above their thresholds, so the full requirements apply
• b.Both are below their thresholds, so only the notification tier applies✓
• c.The combined 250 feet of total material counts against one threshold
• d.The pipe amount is above its threshold and the area is below

Pipe insulation is below 260 linear feet and the other components are below 160 square feet, so neither threshold is met. Neither amount reaches its threshold. 150 linear feet is below 260 linear feet. Linear feet and square feet are not added together; each has its own threshold.40 CFR 61.145(a)(1)

Cal/OSHA says registration is required for contractors that remove asbestos with a fiber content of more than what, and at what size of job?

• a.More than 1% asbestos, with 1,000 square feet or more of surface area
• b.More than 0.1% asbestos, with 100 square feet or more of surface area✓
• c.More than 0.1% asbestos, with 1,000 square feet or more of surface area
• d.More than 1% asbestos, with 10 square feet or more of surface area

Registration is required for removing asbestos with fiber content of more than 0.1% and 100 square feet or more of surface area. Neither the content figure nor the area figure matches the registration trigger. The area trigger is 100, not 1,000. The content trigger is 0.1%, and the area trigger is 100 square feet.Cal/OSHA asbestos registration (Labor Code §6501.5)

A survey covers the floor tile and the boiler room, but does not mention pipe insulation or duct wrap in a 1962 building. What is the estimator's best step?

• a.Assume the omission means that the pipe and duct contain no asbestos
• b.Proceed with the bid, since surveys are the owner's responsibility alone
• c.Remove the pipe and duct first and then test the resulting debris afterward
• d.Ask for a supplemental survey, or price the pipe and duct as presumed ACM✓

Pipe insulation and duct work must be surveyed for asbestos, and in a building constructed no later than 1980 the insulation is presumed until tested. An omission is not a negative finding. Testing debris after disturbance defeats the purpose of the survey. Using an incomplete survey leaves the bidder with an unpriced hazard.Cal. Code Regs., tit. 8, §1735(c); 29 CFR 1926.850

A building 40 feet high will be demolished with its nearest part 15 feet from the lot line. What does the table require?

• a.A barrier and a covered walkway, since 15 feet is within 20 feet
• b.A barrier, since 15 feet is between one-fourth and one-half of the height✓
• c.No protection, since 15 feet is more than 5 feet from the lot line
• d.Construction railings, since 15 feet is under 25 feet from the lot line

One-fourth of 40 feet is 10 feet and one-half is 20 feet, so 15 feet needs a barrier. The covered walkway applies at one-fourth of the height or less. No protection applies only past one-half of the height. Railings are for low work only.2025 CBC Table 3306.1

How must steel construction be dismantled?

• a.Beams first from each floor, then columns together
• b.From the lowest tier upward so that debris falls clear
• c.By cutting the connections at one level before moving up
• d.Column length by column length and tier by tier✓

Steel construction shall be dismantled column length by column length, and tier by tier, without overstressing members. Removing beams from every floor first would leave unbraced columns. The work proceeds from the top, not the bottom. Cutting everything at one level releases the structure.29 CFR 1926.858(c); Cal. Code Regs., tit. 8, §1735(n)

Which federal threshold applies to RACM that was removed from facility components and whose length or area could not be measured?

• a.At least 35 cubic feet✓
• b.At least 260 linear feet
• c.At least 35 cubic yards
• d.At least 160 square feet

The off-component threshold is at least 1 cubic meter (35 cubic feet). Square feet is the threshold for other facility components measured in place. Linear feet is the pipe threshold. The threshold is cubic feet, not cubic yards.40 CFR 61.145(a)(1)(ii)

Which materials are presumed to contain asbestos in a building constructed no later than 1980?

• a.Wood framing, plywood sheathing and interior door casing
• b.Window glass, aluminum frames and glazing compound
• c.Thermal system insulation and surfacing material✓
• d.Concrete block, mortar and reinforcing steel in the walls

PACM means thermal system insulation and surfacing material found in buildings constructed no later than 1980. Wood products are not presumed. Masonry is not in the presumption. Glass and aluminum are not in the presumption.Cal. Code Regs., tit. 8, §1529(b)

What is the minimum height of a barrier used for pedestrian protection at a demolition site?

• a.4 feet
• b.6 feet
• c.8 feet✓
• d.42 inches

Barriers shall be not less than 8 feet high and placed on the side of the walkway nearest the construction. Forty-two inches is the construction railing height. Four feet is the walkway width. Six feet is below the 8-foot minimum.2025 CBC §3306.5

A contractor adds a 25 percent markup to cost. What margin on price does that equal?

• a.75 percent
• b.25 percent
• c.30 percent
• d.20 percent✓

With cost 100 the price is 125, and the profit of 25 is 20 percent of 125. Twenty-five percent is the markup, which is measured on cost. Thirty percent has no basis in the arithmetic. Seventy-five percent is the complement of the markup.CSLB 13E-21 (03-2026), computation questions

A fence-line wall 6 feet high is to be demolished 3 feet from the lot line. What does the Building Code table require?

• a.Construction railings✓
• b.No protection
• c.A barrier and a covered walkway
• d.A barrier

Work 8 feet high or less and less than 5 feet from the lot line needs construction railings. A barrier and covered walkway applies to work more than 8 feet high. A barrier alone applies to taller work at greater distances. Protection is not waived at under 5 feet.2025 CBC Table 3306.1

A job's cost is $9,500 before credits, and steel scrap earns a credit of $2,700. What is the net cost of the job?

• a.$2,700
• b.$12,200
• c.$6,800✓
• d.$7,200

The credit reduces the cost: 9,500 − 2,700 = $6,800. Twelve thousand two hundred adds the credit instead of subtracting. Twenty-seven hundred is the credit alone. Seventy-two hundred miscalculates the subtraction.CSLB 13E-21 (03-2026); CalRecycle C&D guidance

An office building 38 feet tall will be dismantled by a contractor acting as Project Administrator. Which Cal/OSHA permit must that contractor hold?

• a.An Annual Permit, because the contractor is not the property owner
• b.A Project Permit, because the structure is more than 36 feet high✓
• c.No permit, because a building is not a tower or other tall structure
• d.A Project Permit if the building is more than 50 feet high

Demolition or dismantling of a building more than 36 feet high requires the Project Administrator to hold a Project Permit. Buildings are covered by the same height trigger. The Project Administrator holds the Project Permit; Annual Permits are for other employers. The trigger is 36 feet, not 50.Cal. Code Regs., tit. 8, §341(d)(3)

Construction documents and a schedule for demolition are required by the building official, and approval has not been given. What does the Building Code say about starting work?

• a.Work shall not be done until the documents or schedule are approved✓
• b.Work may start on the exterior, since interior work needs approval
• c.Work may start and the documents may be approved afterward
• d.Work may start once the owner has signed the schedule

Where the building official requires the documents, work shall not be done until they are approved. Approval comes before work, not after. The code does not split exterior and interior work. The owner's signature is not approval by the building official.2025 CBC §3303.1

A homeowner asks a contractor to jack up a house, remove the old foundation and set the house back on a new one. Which words in the C-21 definition describe that work?

• a.Raises, lowers, cribs and underpins, with structures including their foundations✓
• b.Lays out and installs gypsum board assemblies, with nonstructural framing
• c.Alters and repairs the permanently retained portions of structures
• d.Excavates, grades and hauls earth, with the site work for a project

The definition covers raising, lowering, cribbing and underpinning, and the structure comes with its foundation. That wording belongs to other classifications and has nothing about raising structures. Alterations and repairs of retained portions are what the definition excludes. The definition says nothing about general earthwork.CSLB 16 CCR §832.21 classification text

A basement foundation will be removed from an excavation 7 feet deep that workers must enter. What does Cal/OSHA's permit section say?

• a.An Annual Permit or a Project Permit is required for trenches or excavations 5 feet or deeper✓
• b.A permit applies at 10 feet or deeper
• c.No permit applies, because the permit rule is for demolition
• d.A permit applies when the excavation is within 10 feet of an adjoining building

Construction of trenches or excavations 5 feet or deeper into which a person is required to descend is a permit-required activity. The excavation rule is separate from the demolition height rule. The trigger is 5 feet, not 10. Distance from a neighboring building is not part of the permit trigger.Cal. Code Regs., tit. 8, §341(d)(5)

How must a demolition ball be attached to the load line?

• a.A clamp that is checked by the operator once each week or after repairs
• b.A swivel-type connection and positive means that prevent disconnection✓
• c.A rope knot that can be released quickly in an emergency by the operator
• d.A fixed connection that lets the ball spin freely with the line

The ball is attached with a swivel-type connection to prevent twisting of the line, by positive means so that the weight cannot accidentally disconnect. A quick-release knot defeats positive attachment. The swivel prevents twisting of the line; it does not let the weight disconnect. The rule gives no weekly check as a substitute for positive attachment.29 CFR 1926.859(d)

Wood floor beams serve to brace interior walls during demolition. What must happen to those beams?

• a.They are left in place if the walls are lower than 12 feet
• b.They are left in place until equivalent support is installed to replace them✓
• c.They are cut first so that debris can drop straight to the ground
• d.They are removed after the exterior walls have been taken down

Where wood floor beams brace interior or free-standing exterior walls, they shall be left in place until other equivalent support replaces them. Cutting them first would leave the walls unbraced. Exterior walls are removed top-down, and bracing is addressed by the beam rule, not by that order. The rule has no 12-foot condition.Cal. Code Regs., tit. 8, §1735(f)(4)

In Cal/OSHA's asbestos standard, a material is asbestos-containing material when it contains

• a.At least one-tenth of one percent asbestos
• b.More than ten percent asbestos
• c.More than one percent asbestos✓
• d.A detectable amount of asbestos

ACM means any material containing more than one percent asbestos. Detectable amounts at or below one percent do not make it ACM by this definition. Ten percent is too high. A tenth of one percent is a different standard, used for registration and labeling.Cal. Code Regs., tit. 8, §1529(b)

What must the written pre-demolition survey determine?

• a.The salvage value of materials and the market price for recycled steel
• b.The condition of the framing, floors and walls, and the possibility of unplanned collapse✓
• c.The number of truckloads needed and the nearest disposal facilities
• d.The names of adjoining owners and the dates of their last inspections

The survey determines the condition of framing, floors and walls and the possibility of an unplanned collapse of any portion of the structure. Salvage value is an estimating matter, not the survey's purpose. Truck counts are quantity takeoff. Owner names are not part of a structural survey.Cal. Code Regs., tit. 8, §1734(b)(1)

A pile of crushed concrete measures 405 cubic feet. How many cubic yards is that?

• a.15 cubic yards✓
• b.135 cubic yards
• c.45 cubic yards
• d.1,215 cubic yards

405 ÷ 27 = 15 cubic yards. One hundred thirty-five divides by 3. Forty-five divides by 9. One thousand two hundred fifteen multiplies by 3.CSLB 13E-21 (03-2026), computation questions

A crane is rated 24,000 pounds at the working boom length and angle, and the ball's line has a nominal breaking strength of 80,000 pounds. What is the maximum ball weight?

• a.24,000 pounds
• b.20,000 pounds
• c.6,000 pounds
• d.12,000 pounds✓

Fifty percent of 24,000 is 12,000 and 25 percent of 80,000 is 20,000; the lesser value is 12,000. Twenty thousand pounds is the line limit, which is higher than the crane limit. The full crane rating is not the ball limit. Six thousand pounds is a quarter of the crane rating, which is not a limit in the rule.29 CFR 1926.859(b)

A demolition site shares a 6-foot gap with an occupied neighboring building. What does Cal/OSHA's survey rule require about the neighbor?

• a.Adjacent structures where employees may be exposed must be checked too✓
• b.The neighbor must be vacated for the whole period of demolition
• c.The neighbor's owner must perform a separate engineering survey
• d.No action, because the survey covers the structure being demolished

The rule says adjacent structures where employees may be exposed shall be similarly checked. The rule extends the survey to exposed adjacent structures. The rule does not require vacating the neighbor. It is the qualified person's survey that is extended, not the neighbor's.Cal. Code Regs., tit. 8, §1734(b)(1)

A foundation left open after demolition could collect rainwater and undermine the neighboring property. What does Chapter 33 require?

• a.No action, since drainage on a neighboring property is the neighbor's responsibility
• b.Plastic over the foundation, placed after rain is forecast in the area
• c.Provision to prevent water accumulation and damage to nearby foundations✓
• d.A permanent drain tied to the sewer before demolition starts

Provision shall be made to prevent the accumulation of water or damage to any foundations on the premises or on adjacent property. The section covers adjacent property as well. The section requires prevention but does not mandate a sewer connection. Waiting for a forecast is not prevention.2025 CBC §3303.5

A job generates 80 tons of nonhazardous debris, and the project must divert at least 65 percent. How many tons must be recycled or salvaged?

• a.28 tons
• b.5.2 tons
• c.52 tons✓
• d.65 tons

At 65 percent of 80 tons of nonhazardous debris, 80 × 0.65 = 52 tons must be diverted, leaving 28 tons for disposal. Twenty-eight tons is the amount that may be disposed. Sixty-five tons uses the percentage as tons. Five point two moves the decimal.CalRecycle: CALGreen sections 4.408 and 5.408

A shed 7 feet high is to be demolished 9 feet from the lot line. Which protection does the table require?

• a.Construction railings
• b.A barrier and a covered walkway
• c.A barrier
• d.None✓

Work 8 feet high or less and 5 feet or more from the lot line needs no protection under the table. Railings are required only when the distance is under 5 feet. A barrier is for work taller than 8 feet. The covered walkway is for taller, closer work.2025 CBC Table 3306.1

When must regulated asbestos-containing material be removed from a building being demolished, in general?

• a.If it is found on the exterior of the building
• b.Once the debris has been loaded into trucks for disposal
• c.Before any activity that would break up or disturb it✓
• d.After the building frame has been taken down to the second floor

The general rule is to remove all RACM before any activity that would break up or disturb it or block access to it. Removal after demolition begins would release fibers. Debris loading comes after the material has been disturbed. Interior and exterior material are both covered.40 CFR 61.145(c)(1)

A crane is rated 30,000 pounds at the working boom length and angle, and the ball's line has a nominal breaking strength of 40,000 pounds. What is the maximum ball weight?

• a.10,000 pounds✓
• b.7,500 pounds
• c.15,000 pounds
• d.20,000 pounds

Fifty percent of 30,000 is 15,000 and 25 percent of 40,000 is 10,000; the lesser value governs. Fifteen thousand pounds is the crane limit, but the line limit is lower. Seven thousand five hundred pounds is a quarter of the crane rating, not a rule value. Twenty thousand pounds is half the line strength, not a rule value.29 CFR 1926.859(b)

A survey finds a buried tank on the property that may have held flammable liquid. What must be done before demolition starts?

• a.The tank is filled with water and left in place under the new grade
• b.Testing and purging, with the hazard eliminated first✓
• c.No action, because tanks are outside the building and not part of demolition
• d.Demolition proceeds and the tank is tested afterward

When hazardous chemicals or flammable materials are apparent or suspected, testing and purging shall be performed and the hazard eliminated before demolition is started. The rule covers tanks, pipes and equipment on the property. Filling and leaving the tank in place does not eliminate the hazard by the rule's method. Testing comes before demolition, not after.Cal. Code Regs., tit. 8, §1735(b)

A building move must pass near an energized overhead line of 12,000 volts. What minimum clearance does Cal/OSHA's general table require between the building and the line?

• a.16 feet
• b.20 feet
• c.10 feet
• d.6 feet✓

For lines from 600 to 50,000 volts, the general clearance is 6 feet. Ten feet applies to lines over 50,000 volts up to 345,000 volts, and to boom-type equipment on lines up to 50,000 volts. Sixteen feet applies to lines above 345,000 volts up to 750,000 volts. Twenty feet applies to the highest voltage band in the table.Cal. Code Regs., tit. 8, §2946(b)(2), Table 1

What must the automatic backing alarm on a large haulage vehicle do?

• a.Sound while the vehicle is operating on public streets
• b.Sound after the vehicle has moved 10 feet backward
• c.Sound immediately on backing and be audible from 200 feet✓
• d.Sound when a spotter is not in clear view of the driver

The warning sound must be audible from a distance of 200 feet and sound immediately on backing. The alarm sounds immediately, with no delay distance. The alarm is not conditional on spotter presence. The rule applies to vehicles on construction sites, not only public streets.Cal. Code Regs., tit. 8, §1592(a)

What are the lead PEL and the lead action level in Cal/OSHA's construction lead standard, as eight-hour averages?

• a.50 milligrams per cubic meter and 25 milligrams per cubic meter
• b.10 micrograms per cubic meter and 2 micrograms per cubic meter✓
• c.100 micrograms per cubic meter and 50 micrograms per cubic meter
• d.2 micrograms per cubic meter and 10 micrograms per cubic meter

The PEL is 10 micrograms per cubic meter and the action level is 2 micrograms per cubic meter, each as an 8-hour TWA. The units and numbers are far too high. The two values are reversed. Those numbers are not the standard's values.Cal. Code Regs., tit. 8, §1532.1(b),(c)

What is the PEL for respirable crystalline silica in Cal/OSHA's construction silica standard?

• a.5 micrograms per cubic meter, calculated as an 8-hour TWA
• b.50 milligrams per cubic meter, calculated as a 15-minute average
• c.50 micrograms per cubic meter, calculated as an 8-hour TWA✓
• d.500 micrograms per cubic meter, calculated as a 30-minute average

The PEL is 50 micrograms per cubic meter as an 8-hour time-weighted average. The units and averaging time are wrong. The value is too low by a factor of ten. The value and averaging time are both wrong.Cal. Code Regs., tit. 8, §1532.3(d)

The C-21 definition says the structures are handled "including their foundations." What does that mean for a job that removes a house?

• a.The foundation is excluded unless the house is also moved
• b.The foundation must be removed by a contractor with another classification
• c.Taking out the foundation is part of the classification's scope✓
• d.The foundation is left to the owner, since the definition covers the structure above grade

The definition covers structures including their foundations, so foundation removal belongs to the classification. The definition does not send foundation work elsewhere. Moving the house is not a condition for including the foundation. The words "including their foundations" put foundation removal inside the scope.CSLB 16 CCR §832.21 classification text