CSLB Concrete C8 License Practice Test #2 Questions And Solutions

CSLB Concrete C8 License Practice Test #2 Questions And Solutions A concrete slab spans 15' x 12' x 4". The slab has a 3' x 3' sunlight cut out in the center. How much concrete will be required? - answer 2 1/4cu yds Before the concrete pavement begins, which of the following needs more attention? - answer Tie bar detailing Explanation: As reinforcement work typically differs in pavement works, tie bar detailing needs more attention than the other listed options. The KEY advantage of reinforced concrete among the following is ______________________. - answer Can be moulded to any shape Explanation: Though all the options are correct, key advantage is that reinforced concrete can be moulded to any desired shape/size. What is/are the example(s) of the pozzolan materials used for pozzolana cement? - answer ALL OF THESE! -Silica fume -Fly ash -Rice hull ash Which of the following factors must be considered while concreting in hot weather in order to ensure the concrete strength is protected? - answer ALL OF THES -Ingredients -Placing -Curing If the concrete surface requires frequent cleaning, or the concrete surface is to be used as flooring, it shall have a __________________ finish. - answer Smooth The property of concrete by which it can be mixed, transported and placed in position with ease is referred as ____________________. - answer Workability Shrinkage test is conducted to check the ________________ of the concrete. - answer Cracking What could be the result from over vibration while pouring the concrete? - answer Segregation If the concrete is planned for a stepped footing with the size 4' x 4' and 3' x 3' with a thickness of 8" for each step. Calculate the concrete quantity - answer 16.57 What is the compliance requirements that the contractor needs to meet before the commencement of the concrete job - answer ALL OF THESE! -Mix design report -Shrinkage test report -Material compliance report If a new slab is to be added or joined to an existing one, which of the following will happen if the new work bleeds during concreting. - answer The surface will develop cracks . If the concrete curbs are to be constructed over the existing pavement, _______________ are used to fix them to pavement. - answer Steel dowels Which of the following is NOT an example of blended cement? - answer Combination of silica fume and chlorine fluoride Explanation: Blended cement is a combination of either Type || or Type V cement with any of the SCM Which of the following is a line at which the face of the curb meets the top of the payment? - answer Control Joint Which of the following is NOT used as concrete chemicals? - answer Abrasion bonding compound Explanation: Concrete curing compound and polymer bonding agent are both concrete chemicals. The admixtures that are used in concrete to improve durability in freeze/thaw environments are ________________. - answer Air entrainment admixtures The fly ash which is used as SCM has the specific gravity ___________________. - answer 1.9 - 2.8 The maximum size of the conduit or pipe shall NOT exceed _______ of the thickness of the concrete. - answer 1/3 Which of the following tests for concrete is conducted at the site/field? - answer Color Test Explanation: Rest of the above are laboratory tests. If the concrete compressive strength specified is less than 3600 psi, it has the option of being tested at 28 days and is able to accept the concrete if it attains ___________ percentage of the minimum required strength. - answer 85 If the admixtures are used in concrete for the purpose of delayed setting and hardening of concrete, they are called _____________? - answer Retarders The leveling operation that removes lumps and hollows and provides a true and uniform concrete surface is called ______________________. - answer Screeding If the quantity of concrete is less than _____________ cubic yards, the compliance test reports are not required. - answer 50 Which type of Portland cement is used when early strength is expected? - answer Type ||| Which of the following factor influence the positioning of the joints in a slab on grade? - answer ALL OF THESE -Sub grade conditions -Finishing requirements -Temperature Which of the following is NOT a property of concrete? - answer High tensile strength The concrete work is done in freezing zones, it gets cured by ______________. - answer Steam