2023 CSLB Construction Concrete C8 License Practice Test With Answers (73 Solved Questions)

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CSLB Concrete C8 License Practice Test#2 correctly answered latest 2023The maximum size of the conduit or pipe shall NOT exceed _______ of the thickness ofthe concrete.-correct answer 1/3Which of the following tests for concrete is conducted atthe site/field?-correct answerColor TestExplanation:Rest of the above are laboratory tests.If the concrete compressive strength specified is less than 3600 psi, it has the option ofbeing tested at 28 days and is able to accept the concrete if itattains ___________percentage of the minimum required strength.-correct answer 85If the admixtures are used in concrete for the purpose of delayed setting and hardeningof concrete, they are called _____________?-correct answer RetardersWhich of the following are the general types of vibrating needles that are in use?-correct answer ALL ANSWERS!-Internal vibrators-Immersion vibrators-Surface vibratorsConcrete proportioning is done based on the facilities available at the site. Which arethegeneral proportioning methods used for concrete?-correct answer ALL OF THESE-Surface area method-Mix design based on flexural strength-Maximum destiny methodThe minimum cementitious material that is required for concrete bridging deck is______________lbs/cu yd.-correct answer 675The amount of free water used in concrete shall not exceed ____________ pounds percubic yard of concrete.-correct answer 310Explanation:If the SCM are added, it can be increased to 20 pounds per each required 100poundsof cementitious material in excess of 550 pounds per cubic yard.

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If the concrete curbs are to be constructed over the existing pavement,_______________ are used to fix them to pavement.-correct answer Steel dowelsWhich of the following is NOTan example of blended cement?-correct answerCombination of silica fume and chlorine fluorideExplanation:Blended cement is a combination of either Type || or Type V cement with any of theSCMWhich of the following is a line at which the face of thecurb meets the top of thepayment?-correct answer Control JointWhich of the following is NOT used as concrete chemicals?-correct answer Abrasionbonding compoundExplanation:Concrete curing compound and polymer bonding agent are both concrete chemicals.The admixtures that are used in concrete to improve durability in freeze/thawenvironments are ________________.-correct answer Air entrainment admixturesThe fly ash which is used as SCM has the specific gravity ___________________.-correct answer 1.9-2.8The leveling operation that removes lumps and hollows and provides a true and uniformconcrete surface is called ______________________.-correct answer ScreedingIf the quantity of concrete is less than _____________ cubic yards, the compliance testreports are not required.-correct answer 50Which type of Portland cement is used when early strength is expected?-correctanswer Type |||Which of the following factor influence the positioning of the joints in a slab on grade?-correct answer ALL OF THESE-Sub grade conditions-Finishing requirements-TemperatureWhich of the following is NOT a property of concrete?-correct answer High tensilestrengthThe concrete work is done in freezing zones, it gets cured by ______________.-correct answer Steam

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Explanation:It is done by heating concrete by steam or using alternating current, so that watercontent in the concrete is not increased.Coarse aggregate in concrete is the material that is retained in sieve number____________.-correct answer #4Explanation:The one which passes through sieve #4 is the fine aggregate.All of the structural steel is considered satisfactory even if it is rusted, but still meets thedensity requirements, except ___________________.-correct answer Pre stressingsteelExplanation:If the pre stressing steel is rusted, it cannot be used since it does not meet thecompliance requirements.The compressive strength of concrete when treated with a 4" cube is always____________ than when testedwith a 6" cube.-correct answer MoreThe practice of making concrete to achieve the stipulated minimum strength anddurability and to make concrete in the best economical manner is called_________________.-correct answer Mix designExplanation:Mixdesign uses the theoretical calculations to get the desired higher strength inconcrete but yet consuming minimum cement.What is the purpose of using SCM in concrete other than meeting workabilityrequirements?-correct answer To avoid emissions:The cement production is responsible for 7% of the greenhouse gas emissions (GHG).If the contractor has to transport the concrete, what is the specified time for the concreteafter catching under normal circumstances?-correct answer Before 1 1/2 hoursExplanation:Or before 250 revolutions of the drumWhat is NOT a key purpose in using SCM in concrete?-correct answer Short termcuring periodThe rough concrete finishes are generally appropriate for surfaces subject to_______________.-correct answer Traction

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