CSLB Concrete C-8 License 1 Practice Exam

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• Which factors determine the minimum cement content in a concrete mix for C-8 projects?
• How does the fineness of cementitious materials affect concrete performance?
• Fly ash effect on permeability?
• What is the difference between plain concrete and reinforced concrete?
• What is the purpose of air-entraining agents in concrete, and how do they affect durability?
• What is the purpose of a leveling course under concrete?
• According to bundling rules, a group of parallel bars acting as a unit is limited to how many bars?
• What is the area in square feet of a cylinder that has a radius of 6 inches and height of 8 feet?
• To ensure proper grounding, the electrode must be encased by how many inches of concrete?
• What rebar size is used for stem walls?
• Compacting placed concrete is advisable because of:
• When batching concrete, what percentage of cement powder is commonly used?
• What is the sales tax amount on 225 dollars at 8.75%?
• For a 4-inch slab with a radius of 10 feet, how many cubic yards of concrete are required?
• Which statement best describes the relation between strength and stiffness?
• Which option best differentiates reinforced concrete from plain concrete in terms of tensile stress?
• What does the concrete mix ratio 1:2:4 denote in standard practice?
• At what age are compressive strength tests commonly performed for cured concrete cylinders?
• When calculating the net slab area, which void areas are subtracted?
• When welding bars on site, safety and what else should be considered?
• What is the maximum spacing of the control joints in a slab that is to receive a floor finish?
• What is the primary purpose of curing concrete?
• In a reinforced concrete beam, what is the primary function of stirrups?
• When batching concrete, what is the typical cement powder percentage range?
• What is the difference between ready-mix and site-mixed in quality control terms?
• What practice is recommended for cold weather concreting to avoid early-age cracking?
• In the shortcut method, what percent of the square’s area corresponds to the circle’s area?
• What is the volume of a cylinder with a diameter of 3 feet and length 12 feet?
• To convert cubic feet to cubic yards, by what number do you divide?
• How many cubic yards of backfill are required for a 3' x 5' trench, 1500 ft long, with a 1-foot diameter pipe?
• Which of the following has the highest Load Bearing Value?
• What is the difference between water curing and curing with a membrane-forming compound?
• Which class of formwork is used for heavy loads?
• In the shortcut method for calculating circle area from a square, the circle area equals the square area multiplied by what factor?
• In the example, what is the price per cubic yard of concrete?
• Which statement about construction joints is accurate?
• How does ambient temperature influence concrete set time and strength development?
• Concrete cylinders are typically tested to determine 28-day strength under standard curing conditions.
• The anchor bolt must be embedded ___ into the slab.
• Which California agency enforces prevailing wage on public works projects?
• A broom finish on slabs provides what property?
• How long can a batch of concrete be in the truck before considerations of quality arise?
• For the patio (excluding sidewalk), if the slab is 4 inches thick, how many cubic yards of concrete are required?
• What is a bond beam and where is it used in concrete structures?
• What is the spacing of anchor bolts from ends of sill plates?
• In the shortcut method, a circle is 78.5% of the area of its circumscribed square. If the square is 20’ by 20’, the circle area is approximately:
• What would be the easiest way to avoid puddling under a slab?
• What is a key requirement of formwork design to prevent distortion during concrete placement?
• To convert cubic feet to cubic yards, divide by 27. What is the factor that converts cubic feet to cubic yards?
• What does the Industry Method for estimating slab volume involve?
• Why is aggregate grading important in concrete mix design?
• The square area used in the shortcut method for a circle with a diameter of 20 feet is:
• A mix with a higher percentage of rock has the advantage of:
• Terrazzo, in the simplest terms, is described as what?
• What is the area of the circle with a diameter of 20 feet?
• If the quantity of concrete were increased to 3 cubic yards, what would be the total price including tax, using the same tax rate?
• What is the purpose of a construction joint and where would you typically place one?
• Pitch in a spiral reinforcing is a measure of:
• Among common foundation substrates, which has the highest bearing value?
• Which statement correctly describes how the fineness of cementitious materials affects concrete performance?
• Which statement best describes the effect of increasing the water-cement ratio on concrete strength and durability?
• How should concrete be consolidated to avoid air voids and honeycombing?
• What measures are recommended for hot-weather concreting?
• What is the minimum depth of a footing below the soil?
• What is the purpose of a vapor retarder under slabs-on-grade?
• What does 'OC' in bolt spacing stand for?
• A rectangular foundation area is 2013.94 sq ft with three voids totaling 170.75 sq ft; the net area is what?
• What is the primary purpose of batch-ticket verification in QC for concrete pours?
• If rebar is not in direct contact with soil or weather, the encasement can be less than 3 inches.
• What is the maximum spacing of control joints in driveways?
• In the example calculations, what thickness is used for the slab?
• What is the minimum concrete cover when rebar is cast against and permanently exposed to earth?
• Which of the following is true about the relation between strength and modulus of elasticity in concrete?
• What mechanism do air-entraining agents use to improve durability in freeze-thaw environments?
• High-early concrete curing occurs after how many days?
• The main field of the slab must be reinforced with what grid size?
• Adding fly ash to a concrete mix typically results in what performance change?
• PSF stands for which unit in structural calculations?
• Which statement best describes the purpose of spacing controls in stem wall reinforcement?
• Where are spiral rebar ties used?
• What effect does using silica fume have on concrete properties?
• Which statement about concrete cover is true?
• What is the typical relationship between compressive strength and modulus of elasticity in concrete?
• In a beam not exposed to weather or soil; what is the minimum coverage for #4 reinforcing bar?
• Which is the most common method for measuring slab flatness and levelness on a project?
• What is the main benefit of using epoxy anchors for embedded items in concrete?
• What is the embedment depth for anchor bolts in the slab?
• Bleeding in concrete is caused by water rising to the surface. How can bleeding be controlled?
• Construction joints are:
• In a lab, how are concrete cylinders tested?
• What does a slump test measure?
• If the area in square feet is 0.875 and the length is 75 feet, what is the volume in cubic feet?
• If a circle’s diameter is 20 feet, what is its radius?
• Which statement about leveling courses is true?
• What is the maximum spacing of the rebar in the stem wall?
• Finishing with a steel float: what is one effect?
• What is the area in square feet corresponding to 126 square inches?
• Control joints in sidewalks should be spaced at intervals equal to what?
• The area of a circle is approximately what percent of the area of its bounding square?
• Air voids created by air-entraining agents have which trade-off?
• In the Traditional Method for slab volume, how is the volume calculated?
• What is a control joint and why is it used?
• Which statement describes the main purpose of joints in concrete slabs?
• Refer to a house plan. How many square feet does the patio cover (excluding sidewalk)?
• When are concrete cylinders typically tested to determine 28-day strength?
• Bundled reinforcing bars are normally required to have a minimum cover of at least the diameter of the bundle, except in permanent proximity to earth where the minimum will be:
• What is the typical minimum cover for reinforcing steel in exterior slabs to protect against corrosion?
• Which method uses the formula A = π r^2 to determine the area of a circle?
• Which weather conditions may make placing concrete inadvisable?
• What is the main purpose of a slip-form process?
• The code requires additional rebar to be used if the spacing between rebar in the stem wall exceeds what measurement?
• Which statement about ready-mix concrete is correct?
• Which statement best describes a bond beam again for testing purposes?
• What is the minimum required thickness for a concrete slab?
• What tax rate is used in the example calculation?
• What is a concrete half-lap splice and why is it used?
• Why are transverse joints in paving or roadways filled and sealed?
• When parallel reinforcement is placed in two or more layers, the distance between layers must be at least how many inches?
• In seismic category E, what is the required anchor bolt diameter?
• Which statement best describes proper curing?
• What are typical OSHA requirements on a concrete job site regarding PPE?
• What should be included in a change order?
• Which factor is most important when applying concrete to concrete?
• Proper curing of concrete primarily contributes to which long-term property?
• How many cubic yards of concrete are required for a 4-inch slab with a diameter of 15 feet?
• Shotcrete can be wet or dry. What are the advantages of wet?
• What is the minimum spacing between parallel reinforcing bars placed in two or more layers?
• What is the area of a circle with radius 1.5 feet using π ≈ 3.14?
• Saw-cut joints in slabs are typically cut to what depth as a percentage of slab thickness?
• Which of the following is a typical method to ensure quality control on a concrete pour?
• Releasing agent is used on forms; why is over use a problem?
• Which device or method is commonly used to assess slab flatness and levelness on a project?
• What size rebar is used to reinforce stem walls?
• After how many days does concrete reach its maximum strength?
• What size is the #3 rebar?
• What is the primary reason for keeping the work site tidy and free of debris, including used lumber and forms?
• What is a key reason to perform alignment checks on formwork during placement?
• How many cubic yards of concrete are required for a footing that is 75 feet long, given a cross-section with a 6 x 9 inch top face and a 6 x 12 inch bottom face?
• Terrazzo is best described as what?
• What size of footing is required for a 2-story building with a load bearing value of 1,500 psf?
• Which of the following tests is used to measure the consistency of the concrete?
• What is the standard overlap length for #4 reinforcing bar?
• The units used for the cross-sectional areas in the footing calculation are:
• What is the pre-tax cost for 2.5 cubic yards of concrete at $90 per cubic yard?
• Which statement about rebar sizes is correct?
• There are many surface finishes that can be applied to smooth finished concrete. What considerations should be taken into account before application?
• Green concrete is defined as
• What is the total price including tax for the 2.5 cubic yards example?
• Which of the following will cause concrete to lose its strength?
• For quick dry applications you would most commonly use which kind of concrete?
• What is the difference between tamping and mechanical vibration for fresh concrete?
• Which class of formwork is used for temporary or light loads?
• The sides of the main field of the slab must be reinforced with an ___ by ___ grid.
• When would a slab be double reinforced?
• One cubic foot of cement weighs approximately how many pounds?
• If exposure conditions are harsher or reinforcement is larger, what is the typical required minimum cover value?
• What slump range is typical for a flatwork concrete slab that will be broom-finished?
• What is the average deadload of dry concrete, including reinforcement?
• Why might stronger or double ties be used in reinforcement?
• What is the volume in cubic yards of a pour that is 12 feet by 32 feet by 8 inches?
• What is the purpose of the deformed rebar?
• What is the minimum anchor bolt size for seismic category E?
• Construction loads are defined as what?
• During set-up, when is it important to pay special attention to keeping concrete sufficiently moist?
• What is the minimum size of the anchor bolt that can be used in seismic category D or less?
• During consolidation, which outcome should be avoided to prevent surface damage?
• Air-entraining:
• What is the primary purpose of rebar in reinforced concrete?
• If a foundation slab's net area is 1,843.19 square feet and the contractor charges $3.54 per square foot, what is the total cost?
• Which statement describes the recommended spacing for control joints in driveways?
• Based on the plan, what is the foundation slab area in square feet?
• Which item would be included in a complete bid or takeoff?
• If five workers (an apprentice at $17/hr, a supervisor at $33/hr, and three journeymen at $22/hr) work 8 hours, what is the total payroll?
• Required reinforcement bar splicing length or lap length is a function of:
• What are the consequences of improper joint spacing in concrete slabs?
• In cold weather curing, which statement is correct?
• When can the live load be calculated by multiplying height, width and length of a pour and dividing by the deadload?
• In the shortcut method, the area of the circle is obtained by multiplying the area of the bounding square by what factor?
• A standard truck load of concrete is around 10 cubic yards; for a pour 12x32 feet at 8 inches, how many loads are needed?
• What is the role of reinforcement in resisting tensile stresses in concrete?
• In slab quality control, what do FF and FL denote in F-number ratings?
• Which statement best distinguishes contraction joints from construction joints?
• Contraction joints are designed to control cracking due to shrinkage.
• In the shortcut method for a 4-inch slab, the volume in cubic yards is found by dividing the circle area by which number?
• What is the method to compute net foundation slab area when voids are removed from a full rectangle area?
• The concrete stem walls must have #4 rebar how far from the top of the footing and how far from the bottom?
• The total cross-sectional area of the footing face, in square inches, is:
• Strength tests are normally:
• Rebar sizes increase in increments of what amount?
• What is the minimum width of the footing for a 2-story house?
• What is the minimum mixing time for a mixture of 1 cubic yard?
• What is the normal tolerance for the location of bends and ends of reinforcing bar?
• How many cubic yards of concrete are needed for a 4-inch-thick circular slab with a circumference of 25 feet?
• Saw-cut joint depth guideline is to cut to approximately what percentage of slab thickness?
• The grid used on the sides of the slab's main field uses which dimensions?
• What is the maximum spacing of the anchor bolts for a 1-story house?
• What is the maximum spacing of anchor bolts for a two-story house?
• In the calculation example, which figure is used to compute the 8.75% sales tax?
• What is the maximum number of parallel bars that can be bundled together and still be considered a single unit?
• What is the minimum width of the footing for a one-story house?
• In concrete, how do strength and stiffness differ?
• How many cubic yards of concrete are needed for the foundation slab that is 4 inches thick?
• How does reinforcement cover influence corrosion resistance?
• Tensile strength in concrete is achieved by:
• Distinguish surface retarder from curing compound.
• What is the purpose of formwork release agents and when should they be applied?
• What is a normal curing temperature?
• Why is an adequate cure time needed before applying a concrete overlay?
• How should embedded items, such as anchor bolts, be anchored into fresh concrete?
• In exterior slabs, when would the minimum cover for reinforcing steel exceed 2 inches?