In making and curing concrete test specimens, for initial curing, Immediately after molding and finishing, the specimens shall be stored for a period up to ____ hours, 48, 36, 24, 72, In Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete, when the sample has a slump of less than 1 in, to consolidate, the sample must be ___, Vibrated, None of the Above, Rodded, Rodded or Vibrated, In compressive strength of molded concrete cylinder, hydraulically operated machines shall have a loading rate of movement (platen to crosshead measurement) corresponding to a loading rate on the specimen within the range of, 30 to 50 psi/s , 20 to 60 psi/s , 20 to 50 psi/s , 30 to 60 psi/s, In making and curing concrete test specimens, for final curing, beams are to be cured the same as cylinders except that they shall be stored in water saturated with calcium hydroxide at least ____ hours prior to testing, 22, 24, 26, 20, In compressive strength of molded concrete cylinder, If the specimen length to diameter ratio is less than ____, correct the result obtained by multiplying by the appropriate correction factor, 3Pa/ (bd), 3Pa/ (bd^2), 3Pa/ (4bd^2), 3Pa/ (4bd), In sampling of freshly mixed concrete using stationary mixers, no samples should be taken before ___ % or after ___% of the batch has been discharged, 20 and 90 respectively, 20 and 80 respectively, 10 and 80 respectively, 10 and 90 respectively, In making and curing concrete test specimens, for cylindrical specimens, ___ layers of equal depth must be used to rod for specimen with diameter of 9 in., 5, 4, 3, 2, In Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, if A is the mass of oven dry sample, B is the mass of pycnometer filled with water, C is mass of pycnometer with specimen and water, and S is the mass of saturated surface-dry specimen. How do we solve the apparent specific gravity?, S / (B – S – C), S / (B + S – C), A / (B + S – C), A / (B + A – C), For ASTM C39 or AASHTO T22, compressive strength of molded concrete cylinder, test specimens for a given test age shall be broken within the permissible time tolerances . For test age of 7 days, the tolerance is ____, 6 hrs, 12 hrs, 3 hrs, 18 hrs, In sampling of freshly mixed concrete using stationary mixers, sample the concrete by collecting ____ or more portions taken at regularly spaced intervals during discharge of the middle portion of the batch, 5, 2, 3, 4, In Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, if A is the mass of oven dry sample, B is the mass of pycnometer filled with water, C is mass of pycnometer with specimen and water, and S is the mass of saturated surface-dry specimen. How do we solve the SSD specific gravity?, S / (B + S – C), S / (B – S – C), A / (B + S – C), A / (B + A – C), In making and curing concrete test specimens, for beam specimens, ___ layers of equal depth must be used to rod for specimen with width of 6 to 8 inches., 3, 2, 4, 5, In sampling of freshly mixed concrete using pacing mixers, obtain samples from at least ____ different portions of the pile and then composite into one sample for test purposes, 2, 4, 5, 3, In sampling of freshly mixed concrete using revolving drum truck mixers, sample the concrete by collecting two or more portions taken at regularly spaced intervals during discharge of the ____ portion of the batch, first, none of the above, middle, last, In making and curing concrete test specimens, for cylindrical specimens, ___ layers of equal depth must be used to rod for specimen with diameter of 4 in., 5, 4, 3, 2, In making and curing concrete test specimens, for cylindrical specimens, ___ layers of equal depth must be used to rod for specimen with diameter of 6 in., 4, 5, 2, 3, In sampling of freshly mixed concrete, start tests for slump, temperature, and air content within ___ after obtaining the final portion of the composite sample, 5 min, 15 min, 10 min, 20 min, In making and curing concrete test specimens, for beam specimens, the length shall be at least ____ greater than three times the depth, 4 in, 1 in, 2 in, 3 in, In Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete, when the sample has a slump greater than 3 in, to consolidate, the sample must be ___, Rodded, None of the above, Rodded or Vibrated, Vibrated, The ASTM C39 or AASHTO T22, Compressive strength of molded concrete cylinder, specimens shall not be tested if any individual diameter of a cylinder differs from any other diameter of the same cylinder by more than __ %., 1, 6, 2, 4, For ASTM C39 or AASHTO T22, compressive strength of molded concrete cylinder, neither end of compressive test specimens when tested shall depart from perpendicularity to the axis by more than, 1.0°, 1.5°, 0.5°, 2.0, In slump test for concrete, the mold must have a bottom diameter of ____, 50 mm, 100 mm, 200 mm, 300 mm, For ASTM C39 or AASHTO T22, compressive strength of molded concrete cylinder, it is limited to concrete having a unit weight in excess of _____ kg/m^3, 1200, 1000, 600, 800, In slump test for concrete, the mold must have a top diameter of ____, 200 mm, 125 mm, 150 mm, 100 mm, In Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, if A is the mass of oven dry sample, B is the mass of pycnometer filled with water, C is mass of pycnometer with specimen and water, and S is the mass of saturated surface-dry specimen. How do we solve the oven dry specific gravity?, A / (B + S – C), A / (B – S – C), S / (B + S – C), A / (B + A – C), In Flexural Strength of Concrete (Center-Point), apply the load so that the extreme fiber stress increases at a rate between ______, 150 and 175 psi/min , 150 and 200 psi/min , 125 and 175 psi/min , 125 and 200 psi/min, In Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate, a sample of aggregate is immersed in water for 24 ± ___ hours to essentially fill the pores., 4, 3, 1, 2, In making and curing concrete test specimens, for cylindrical specimens, the length ______ the diameter, equal to twice, equal, equal to 4x, equal to trice, In Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete, when the sample has a slump of 1 to 3 in, to consolidate, the sample must be ___, Vibrated, None of the Above, Rodded, Rodded or Vibrated, In Flexural Strength of Concrete (Third-Point), the modulus of rupture is calculated as ________ if the fracture initiates in the tension surface within the middle third of the span length, PL / (bd^2), 3PL / (2bd^2), PL / (bd), PL / (4bd^2), In making and curing concrete test specimens, for initial curing, Immediately after molding and finishing, the specimens shall be stored in a temperature range from ______°C and in an environment preventing moisture loss from the specimens, 16 and 30, 18 and 27, 18 and 30, 16 and 27, In making and curing concrete test specimens, for final curing, at all times, the specimen shall be cured at a temperature of ______ using water storage tanks, 25 ± 2°C, 25 ± 4°C, 23 ± 2°C, 23 ± 4°C, In slump test for concrete, the first fill must be at a height of ____ mm from the bottom., 100, 70, 90, 80, In slump test for concrete, the second fill must be at a height of ____ mm from the bottom., 160 mm, 180 mm, 190 mm, 200 mm, In making and curing concrete test specimens, after each layer is vibrated, tap the outsides of the mold at least ____ times with the mallet, 15, 5, 20, 10, In sampling of freshly mixed concrete, the elapsed time shall not exceed _____ between obtaining the first and final portions of the composite sample, 15 min, 10 min, 12 min, 20 min, In Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete, to consolidate the sample, when rodding is used, Rod each layer with ____ strokes of the tamping rod when nominal 14-L or smaller measures are used, 25, 40, 75, 50, In Standard Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete, to consolidate the sample, when rodding is used, Rod each layer with ____ strokes of the tamping rod when nominal 28-L measures are used, 25, 50, 75, 100, For ASTM C39 or AASHTO T22, compressive strength of molded concrete cylinder, test specimens for a given test age shall be broken within the permissible time tolerances . For test age of 28 days, the tolerance is ____, 15 hrs, 10 hrs, 25 hrs, 20 hrs, In Flexural Strength of Concrete (Center-Point), the modulus of rupture is calculated as ________, 3PL / (4bd), 3PL / (2bd^2), 3PL / (2bd), 3PL / (4bd^2), In compressive strength of molded concrete cylinder, If the specimen length to diameter ratio is less than ____, correct the result obtained by multiplying by the appropriate correction factor, 1.6, 1.8, 2.0, 2.2, In making and curing concrete test specimens, for initial curing, Immediately after molding and finishing, the specimens with specified strength of 6000 psi or greater shall be stored in a temperature range from ______°C, 20 and 26, 18 and 24, 16 and 27, 25 and 36, In slump test for concrete, the mold must have length of ____, 300 mm, 400 mm, 200 mm, 250 mm.

Concrete Testing

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