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CCIL FINAL SCRIPT 2026 PRACTICE
SOLUTIONS GRADED A+
⩥ When sampling from a truck agitator or truck mixer,. Answer: The sample shall be taken between the 10% and 90% points of the discharge ⩥ Grab Sampling. Answer: The operation of securing at one point of the discharge the required volume of representative material in as short a period of time as possible. ⩥ Sampling for uniformity of mixed concrete includes:. Answer: Obtaining three grab samples of concrete for comparative purposes while the mixer is being emptied and keep the samples separate to represent the designated portions in the batch rather than combined to form a composite sample. ⩥ When 100 mm x 200 mm cylinders are to be cast:. Answer: A minimum 20 L sample shall be obtained. ⩥ When 150 mm x 300 mm cylinders are to be cast:. Answer: A minimum 30 L sample shall be obtained.
⩥ When 150 mm x 150 mm x 535 mm cylinders are to be cast:. Answer: A minimum 55 L sample shall be obtained. ⩥ For more than three cylinders or beams, the minimum volume shall be increased. Answer: By a value equal to the volume of the extra specimens, plus 10%. ⩥ Sampling shall by performed. Answer: By passing a receptacle completely through the discharge stream or by completely diverting the discharge into a sample container. ⩥ The sample shall be obtained, transported, and remixed. Answer: Within 10 minutes. ⩥ The sample shall be protected. Answer: From sun, wind, and other sources of rapid evaporation and from contamination. ⩥ When the concrete contains aggregate larger than that appropriate for the size of the moulds or equipment to be used,. Answer: the sample shall be wet sieved prior to testing. For all density tests, an unsieved sample shall be used.
⩥ The minimum length of the internal vibrator shall be. Answer: 50 mm less than the height of the mould being consolidated ⩥ For vibration of cylinders, the ratio of the diameter of the cylinder to the diameter of the vibrating element shall be. Answer: 4.0 or higher ⩥ For vibration of beams, the diameter of the vibrating element or thickness of a square vibrating element shall not exceed. Answer: One third of the width of the mould ⩥ External vibrators, if required, shall be of the table or plank type, and have a minimum frequency of. Answer: 60 Hz ⩥ Weight of the rubber rawhide mallet. Answer: 0.6 +- 0.3 kg ⩥ Steel strike bar dimensions. Answer: 6 mm x 25 mm x 450 mm ⩥ Water storage tanks shall be kept at a temperature of. Answer: 23 +- 2 C
⩥ Manual temperature recordings of water storage tanks shall be taken. Answer: Twice daily, at least 5 days per week ⩥ The water in the storage tanks shall be saturated with. Answer: Calcium hydroxide ⩥ To maintain saturation in water storage tanks,. Answer: Excess calcium hydroxide shall be present ⩥ Water storage tanks shall be cleaned and refilled with water containing. Answer: 3 g/L of calcium at intervals not to exceed 24 months ⩥ Continuously running fresh water or demineralized water in water storage tanks shall. Answer: Not be used, as it can affect test results due to excessive leaching. Instead, use a closed system, circulating the saturated lime water between or among storage tanks. ⩥ The atmosphere in a moist cabinet or moist room shall be maintained at a temperature of. Answer: 23 +- 2 C and relative humidity of not less than 95%
⩥ The moulding of strength test specimens shall. Answer: Be completed within 20 minutes after sampling, including transport and remixing ⩥ The diameter of a cylindrical specimen or the minimum cross- sectional dimension of a beam shall be. Answer: At least 3x the maximum nominal size of the coarse aggregate in the concrete ⩥ The specimens shall be moulded on a level, rigid surface, free of vibration and other disturbances and stored for a duration of. Answer: 28 +- 8 hrs ⩥ Method of consolidation for specimens that have a slump greater than 40 mm. Answer: Rodding ⩥ Method of consolidation for specimens that have a slump less than 40 mm. Answer: Vibration ⩥ Method of consolidation for specimens that have a slump of exactly 40 mm.
Answer: Vibration ⩥ When the specified compressive strength of a flexural strength specimen is LESS than 35 MPa, the depressions or projections can not be larger than. Answer: 3 mm ⩥ When the specified compressive strength of a flexural strength specimen is GREATER than or EQUAL to 35 MPa, the depressions or projections can not be larger than. Answer: 1 mm ⩥ What tool do you use to finish a beam?. Answer: Wood float ⩥ Compression tests specimens shall be cylindrical, with a length equal to. Answer: Twice their diameter ⩥ The sides of a mould shall be tapped smartly. Answer: 10 to 15 times with a mallet, to avoid any air bubbles ⩥ Flowing superplasticized concrete mixes with a slump greater than 180 mm shall be consolidated with.
Answer: 2 ⩥ For a vibration mould, the second layer shall overfill the the mould by a maximum of. Answer: 6 mm ⩥ After vibrating a mould, before striking the excess concrete off, there should be an overfill of. Answer: 3 mm ⩥ In internal vibration on a 100 x 200 mm cylinder, how many insertions per lift of the vibrator are used?. Answer: 1 ⩥ In internal vibration on a 150 x 300 mm cylinder, how many insertions per lift of the vibrator are used?. Answer: 3 ⩥ Laboratory test specimens shall be stored at a temperature of. Answer: 23 +- 2 C ⩥ Laboratory test specimens shall be removed from their moulds after.
Answer: 20 +- 4 hours, and stored in a moist condition with free water maintained on all surfaces of the specimen at all times ⩥ During initial curing of moulds, the test specimens shall be stored in a controlled environment that maintains the temperature of. Answer: 20 +- 5 C ⩥ After removing the specimens from their moulds, the specimens shall be stored in a moist condition with free water maintained on surfaces for a duration of. Answer: 23 +- 2 C ⩥ In demoulding of test specimens, the specimens shall be removed from the moulds after. Answer: 28 +- 8 hrs ⩥ If the concrete has a specified strength of less than 35 MPa, the demoulding time may be extended by. Answer: 76 hrs ⩥ Demoulding specimens are stored in an environmentally controlled facility at the site that maintains a temperature of. Answer: 20 +- 5 C
⩥ How many layers shall you place concrete in for moulds more than 200 mm in depth?. Answer: 3 ⩥ Self consolidating concrete shall be placed in how many lifts?. Answer: 1 ⩥ When concrete is to be put in service, the test specimens shall be removed from their moulds at the end of. Answer: 48 +- 4 hrs ⩥ Specimens shall be removed from the field storage and stored in lime water at. Answer: 23 +- 2 C ⩥ Specimens shall be removed from the field storage and stored in lime water for a duration of. Answer: 24 +- 4 hrs ⩥ A measuring bowl shall be sufficiently rigid to limit expansion to ___ of scale reading at operating pressure. Answer: 0.1%
⩥ When the nominal maximum size of an aggrigate is 40 mm or less, what size bowl do you use?. Answer: 7 L ⩥ When the nominal maximum size of an aggrigate is 56 mm, what size bowl do you use?. Answer: 15 L ⩥ A gauge dial shall be sufficient size to permit direct reading to air volumes in the usual range of. Answer: 0 to 8% +- 0.2% ⩥ A calibration cylinder shall of a volume of _____ of the volume of the base container. Answer: 1 to 6% ⩥ The percentage of air in an air meter is read and recorded to the nearest. Answer: 0.1% ⩥ The test for air content shall be completed within how long of obtaining the sample, including transportation and remixing?. Answer: 10 min
⩥ Test method for slump flow is considered applicable to SCC having coarse aggregate up to _____ in size. Answer: 28 mm ⩥ The surface for a slump flow test must have a minimum thickness of. Answer: 12 mm ⩥ The surface for a slump flow test be. Answer: 800 mm square ⩥ The inner circle of the slump flow board is. Answer: To centrally locate the position of the mould ⩥ The outer circle of the slump flow board is. Answer: 500 mm in diameter ⩥ If concrete in the slump flow has coarse aggregate particles that would be retained on a 32 mm sieve, the concrete sample shall be. Answer: Wet sieved over a sieve having 28 mm square openings before being tested ⩥ For flexural test specimens, there should be one rod for every. Answer: 10 cm^
⩥ The test, transportation and remixing for slump flow shall be completed in. Answer: 10 mins ⩥ How high do you have to raise the slump flow mould when doing the test. Answer: 225 +- 75 mm ⩥ How long should you take to raise the mould in slump flow. Answer: 3 +- 1 s ⩥ When lifting the mould in slump flow, allow concrete to achieve maximum horizontal spread or until _____ has lapsed. Answer: 2 mins ⩥ Repeat the slump flow test if the measurement of the two diameters differ by more than. Answer: 50 mm ⩥ The entire slump flow operation should be finished in. Answer: 3 mins
