CSLB Concrete C8 License Practice Test #4 Questions And Answers Verified 100% Correct

CSLB Concrete C8 License Practice Test #4 Questions And Answers Verified 100% Correct What is the unit of concrete quantity take-off? - ANSWER Cubic feet Which of the following concrete pouring strategies is commonly adopted while filling stair steps? - ANSWER From bottom to top How much water needs to be added to the concrete to increase the slump value of a cubic yard of concrete by one unit? - ANSWER One gallon Which of the following factors increases the drying shrinkage as well as creeping in concrete structures ? - ANSWER Low Temperature & Low Relative Humidity Which of the following are three major types of concrete project cost estimates that are commonly used in the project planning? - ANSWER Preliminary Estimate, Detailed Estimate, Engineer's Estimate Explanation: Preliminary estimate is general conceptual estimate based on the conceptual design of a project. Detailed estimate is based on the detailed scope of work of the project. Engineer's estimate is the final estimate based on the project specifications and plans. What is the recommended curing time for a normal concrete between 50°F to 70°F? - ANSWER 7 Days Explanation: After 7 days, concrete will be able to withstand heavier loads, however, heavy machinery should still be kept away from the concrete. Foundation false-work is commonly done with the help of: - ANSWER Piling or Mudsill Which of the following statements about structural and non-structural concrete is correct? - ANSWER Non - structural c oncrete uses lightweight concrete only What is the recommended waste ratio for ready mixed concrete commonly adopted in the industry? - ANSWER 7.3% What is the standard weight of cement, sand, and aggregate, respectively, that will be required to make one cubic feet of fresh concrete of 1:2:3 ratios? - ANSWER 22 pounds, 41 pounds, 70 pounds What is the recommended wastage ratio considered for estimating the heavy weight reinforcing steel bars of #30 or above for a concrete construction project? - ANSWER 3.3 percent What is the recommended ratio of wastage for formwork commonly used in the concrete construction industry? - ANSWER 25 percent How many square inches are there in a square foot of area? - ANSWER 144 square inches The drying shrinkage of concrete is independent of _____________in the concrete, as concrete dries up during the setting time. - ANSWER Stress Which of the following tests are recommended by ASTM C94 standard to verify the quality of ready mixed concrete while pouring it in the structural forms? - ANSWER Temperature Test, Air Content Test, Slump Test How many take-off methods are commonly used for concrete estimating activity in the industry? - ANSWER 3 Explanation: There are three take-off methods commonly used for concrete take-off needs. UnitTake-off Perimeter Take-off Centerline Take-off Which of the following cost estimate methodologies is commonly used in a concrete construction planning project? - ANSWER Unit Cost Method Explanation: The unit method is the more practical approach because it uses an operational unit as the base of cost. This cost includes each and every factor required to complete an operational unit. So, the accuracy of this method is based on practical work of the same type. The ratio of cement, sand, aggregate, and water to prepare fresh/wet concrete is defined in terms of ________ not ________. - ANSWER Weight & Volume Which of the following ratios of moisture is recommended in a soil or granular layer to achieve the best quality of compaction? - ANSWER 12 percent Which of the following options is NOT a structural concrete element? - ANSWER ALL -Statuary -Cornices -Corbels Which of the following pieces of equipment is commonly used for small project concrete floating to give a finished look? - ANSWER Darby Which of the following statements is true about concrete swelling in humid or wet conditions? - ANSWER Swelling takes longer periods , ranging from 6 to 12 months