CIM ASTM Level 1 Certification Practice Test

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• How many layers should the slump mold be filled in during testing?
• What shape should the ends of the tamping rod be for the slump test?
• The pressure method for air content determination can be used on concrete containing what type of aggregate?
• What does ASTM C173/C173M refer to?
• In accordance with ASTM standards, how should the sample of concrete for the slump test be obtained?
• What is the requirement for the supporting surface on which specimens are stored?
• For a measure of 14L [0.5 ft³], how many strokes of the taming rod are required for each layer?
• Sampling from a paving mixer requires how many portions of the pile to be combined?
• The outside diameter of the vibrating element must be at least what measurement?
• Which of the following is a key difference between standard curing and field curing?
• What should be done if the air content exceeds the 9% range of the meter?
• Which of the following properties is NOT appropriate for the slump test mold's surface?
• When filling a standard 4 by 8 inch cylinder mold, how many equal layers should it be filled in?
• How frequently must the temperature measuring device be verified?
• What is the minimum frequency of an internal vibrator used in this procedure?
• What is the primary concern regarding the environment for field cured cylinders?
• What is the diameter of the base of the slump mold?
• Before weighing the measure and sample, what must be done after completing the strike off procedure?
• What is the minimum frequency of the vibrator required in the slump test method?
• What is the required shape of the tamping end of the rod in the slump test?
• According to the concrete consolidation method, how many approximately equal layers should the measure be filled in when using vibration?
• What is the specified size of the mallet required for this test method when the measuring bowl has a capacity of 14 L or less?
• The measurement for slump is made from the top of the mold to which point of the concrete specimen?
• Which types of aggregate may be used with the volumetric method of determining air content of concrete?
• What is the height of the slump mold?
• When should cylinders made for determining serviceability of a structure be removed from their molds?
• What conditions can affect the accuracy of the slump test?
• What method must be used to consolidate concrete with a slump of less than 1 inch?
• What temperature range should the measuring device cover?
• Air meter bowls used for this test must conform to which standards?
• What diameter range is acceptable for the tamping rod specified in this testing method?
• What is the minimum thickness required for a glass or acrylic strike-off plate?
• What should be done to portions of a composite sample before beginning tests?
• Is a composite sample of concrete necessary for temperature determination?
• If undisturbed concrete portions are found in the air meter at the end of the test, what is the outcome?
• What calibration adjustment may be necessary based on the use of isopropyl alcohol?
• What accuracy is required for the temperature measuring device over a specific range?
• Field curing is specifically used to determine what regarding the structure?
• What effect does using large amounts of alcohol have on the direct reading of air content?
• What environmental conditions must be matched for field cured cylinders?
• What should the overall length of the tamping rod not exceed?
• In which situation would you need to use a sieve for the aggregate during a slump test?
• What happens if the temperature is outside the specified curing range for a concrete specimen?
• The final liquid level in the neck of the air meter is estimated to the nearest what percentage?
• Upon completion of initial curing, can test specimens be left in their molds and sealed in plastic bags?
• Which tool may be used to strike off the top surface of concrete after consolidation?
• When consolidating a flexural strength test specimen by rodding, how many strokes are needed for every 2 cubic inches of top surface area?
• What must the strike-off bar made of in this test method?
• The sample of concrete used in this test method must be obtained in accordance with which ASTM Standard?
• What method of consolidation should be used when the slump is greater than 3 inches?
• What type of rod must the tamping tool be made of?
• If rodding is the method of consolidation, how many layers should the measure be filled in?
• If the concrete level is found to be 13mm above the top of the measure after consolidation, what is the recommended action?
• What is the final step to be taken with the air meter at the end of the procedure?
• Which test is used to determine the consistency of concrete mixes?
• Vibration of the concrete sample is not allowed when the slump exceeds what measurement?
• What are the required characteristics of the tamping rod used in the concrete testing method?
• What is the main advantage of the temperature measuring device used in concrete testing?
• Which types of aggregates should not be used when employing the pressure method of air content determination?
• What is the specified number of strokes required for each layer when rodding the concrete sample?
• What is the approximate volume of the measuring cup used for water addition related to the air meter bowl?
• Is it acceptable to rotate the mold while raising it?
• What defines a successful stabilization of the liquid level in the meter for an initial reading?
• What is the required penetration depth of the tamping rod during rodding?
• What is the minimum length of the tamping rod required for concrete testing?
• What is the temperature range for storing test specimens that are to be standard cured, within 48 hours after molding?
• What is the critical factor in determining the slump of concrete?
• How long should the temperature measuring device remain in freshly mixed concrete?
• What is the optimum amount of concrete excess allowed above the top of the measure after consolidation?
• Why is it important to achieve equal depth when filling the measuring bowl?
• What should be performed prior to obtaining a concrete sample?
• How many portions are required when sampling concrete from a revolving truck mixer?
• What is the role of ASTM C172 in concrete testing?
• Approximately what fraction of the mold's volume should each layer fill?
• What is the maximum time frame for transportation of test specimens?
• From which part of the batch should the composite sample from a truck mixer be obtained?
• What is the maximum allowable time to start molding specimens for strength tests after fabricating the composite sample?
• If the concrete contains aggregate larger than what is allowed for the slump test, what must be done?
• What is the diameter of the tamping rod used in the slump test?
• What is the purpose of ASTM C31/C31m?
• What type of aggregates is unsuitable for the pressure method used in determining air content?
• If the concrete contains aggregate larger than the maximum allowed for this test, the sample must be what?
• What shape is the mold used for the slump test?
• For a 6 by 12 inch cylinder mold, what is the maximum aggregate particle size allowed without wet sieving?
• What is the minimum thickness required for a metal strike-off plate?
• Which condition must be true for the liquid level to be acceptable for an initial reading?
• How many times should the vibrator be inserted into each layer of concrete during consolidation?
• To what precision should the temperature of the concrete be reported?
• What should be done to the sample container before sampling concrete?
• What must be done if the concrete contains aggregate larger than permitted for a particular test method?
• From where must concrete be removed before lifting the mold?
• When more than 1.25L of alcohol is used, what must be done to the final meter reading?
• What is the role of the mallet during the testing process?
• How long should the air meter be inverted and agitated?
• How long should you wait after molding test specimens before moving them to initial storage?
• What is the specified weight of the mallet for measures that are 14L [0.5 ft³] or smaller?
• Is it acceptable for the interior surface of the slump mold to have minor irregularities?
• Specimens for acceptance testing should not be transported until which period?
• What are the requirements for the tamping rod in the air content test method?
• When the concrete is to be consolidated by vibration, the measure is filled in how many layers?
• What does ASTM C138/C138M refer to?
• A mallet weighing ________ must be used to tap the sides of the bowl after rodding each layer.
• In the context of the air meter, what does the term "meniscus" refer to?
• What type of container is required for measuring in the slump test method?
• What type of surface should the slump mold be placed on?
• What is the required diameter for a tamping rod used on cylinders with a diameter of 6 inches or greater?
• According to ASTM Method C31, what are the standardized requirements for test specimens?
• Is it necessary to tap the sides of the measuring bowl?
• How many times does the rolling operation typically occur during testing?
• What type of alcohol and concentration is required for this test method?
• What is the primary purpose of curing concrete test specimens accurately?
• How deep should the temperature sensing portion of the measuring device be submerged in freshly mixed concrete?
• If using an internal vibrator for a 6 x 12 inch compressive strength test specimen, how many insertion points are recommended for each layer?
• How is a flexural strength specimen consolidated effectively during the test?
• What type of container can be used to obtain the concrete sample for this procedure?
• What factor is essential to maintain for the transportation of test specimens?
• How many times must each layer be rodded when using a standard 6 x 12 inch cylinder?
• How long must specimens be allowed to set before transportation?
• How should the air content be addressed during testing when using an alcohol solution?
• Measures other than air meter bowls used for this test must conform to which ASTM standard?
• When must concrete samples from a truck mixer be obtained in relation to the addition of water or admixtures?
• To ensure correctness, how should the measurement for slump be reported?
• What is the weight tolerance for the mallet used in concrete testing?
• In rodding the sample, how deep should the rod penetrate each layer?
• What is the standard practice for sampling freshly mixed concrete according to ASTM C172/C172M?
• What does ASTM C143/C143M refer to in concrete testing?
• Sampling by ASTM C172/C172M is aimed at determining compliance with what?
• What happens if the concrete level is lower than the top of the mold during rodding?
• What should the operator ensure after submerging the temperature measuring device?
• What are the dimensions required for the strike-off bar used in the test method?
• What should be done to the measure after rodding each layer before adding another layer of concrete?
• The slump of the concrete is reported to the nearest what measurement?
• Which of the following governs the collection of concrete samples for testing?
• What is the purpose of starting strength tests quickly after composite sample fabrication?
• Which is considered an improper sampling method from a paving mixer?
• What is the minimum size sample required to make strength test specimens?
• The sample of concrete used for temperature determination must be rodded how many times?
• What diameter must the tamping rod be according to the specifications?
• When filling the measuring bowl of the air meter, the concrete must be placed in _________ of equal depth.
• What is the primary purpose of ASTM C1064/C1064M?
• How should specimens be prepared if they are not to be standard cured within 48 hours?
• The maximum size aggregate allowed in this test method is ______.
• What is the main purpose of taking the temperature of concrete according to ASTM C1064?
• For accurate slump test results, the mold should be what?
• If the concrete sample contains aggregate larger than that allowed for this test, what must be done?
• What should be done to protect test specimens during the curing process?
• What is a potential consequence of using aggregate larger than the specified size?
• What is the appropriate penetration depth for the tamping rod into the layer below while rodding?
• In field curing, the temperature of the surrounding environment must be managed to ensure it matches what?
• Upon final filling of the air meter with water, which part of the liquid level should be adjusted to the zero mark on the meter?
• Which of the following is not a condition that must be protected against during specimen transportation?
• Is a plastic container suitable for measuring concrete according to the slump test method?
• After the final rodding, should the sides of the slump mold be tapped lightly?
• When sampling from a paving mixer, how many different portions of the pile should be obtained to create a composite sample?
• During temperature measurement, what should be ensured about the measuring device's position?
• Standard curing is utilized for test specimens that will be used for which purpose?
• If less than 1.25L of alcohol is used, what is true regarding the final meter reading?
• True or False: Temperature measurement can be performed in a wall form.
• When tamping the upper layer of concrete, how far should the rod penetrate into the underlying layer?
• For the tamping end of the rod, what is the recommended shape?
• What method of consolidation should be used when the slump is less than 1 inch?
• What ASTM method must be used to obtain the concrete sample?
• After the slump test is completed, what should be the next step?
• What should be the diameter and length specifications for the tamping rod in this test method?
• During the initial curing phase, what should be the temperature for concrete mixtures with lower strength requirements?
• How much time is allowed for lifting the slump mold during the slump test?
• Which three tests must be conducted along with strength specimens?
• Where should cylinders that are to be field cured be stored?
• Which conditions must be prevented when transporting test specimens?
• What condition must be met regarding the temperature measuring device during accuracy verification?
• What does ASTM C31 require for transporting concrete test specimens?
• What is the maximum size aggregate allowed for this test method?
• What is the primary purpose of standard curing methods?
• The sample of concrete used for this test is to be obtained in accordance with which ASTM Standard?
• Which statement accurately reflects the outcome if the air meter shows signs of leakage?
• What must be done to the concrete around the temperature measuring device once it is submerged?
• What must be done after the temperature of the concrete is read?
• In accordance with what ASTM Standard must a concrete sample be obtained for molding test specimens?
• How much total time is allowed to conduct the slump test from beginning to completion?
• For an initial meter reading to be valid, which of the following must NOT occur?
• What is the depth of the first layer of concrete after placement?
• What is the maximum distance allowed between insertion points when internal vibration is used for consolidating a flexural strength test specimen?
• What is the purpose of adding isopropyl alcohol to the meter?
• What is the maximum size aggregate permitted for the slump test?
• What is the proper action if a concrete specimen has a slump of over 1 inch?
• What is a precaution when using vibration for consolidation?
• It is true or false that concrete samples from a truck mixer must be obtained before water or admixtures are added at the job site?
• What is the specified number of strokes required after each layer of concrete?
• What is the maximum elapsed time allowed between obtaining the first and final portions of a composite sample?
• For concrete mixtures with specified strengths of 6000 psi or greater, what is the required initial curing temperature range?
• What action should be taken if the concrete level drops below the top of the slump mold?
• What type of plate is specified to have a minimum thickness of ½ inches?
• How many times should the tamping rod be used to rod each layer uniformly?
• While sampling from a revolving truck mixer, how should the concrete be collected?
• The initial quantity of water and alcohol added to the air meter can be poured directly into the neck of the top section. True or false?
• Which two factors must be avoided to protect the concrete sample?
• Which types of mixers does the sampling method cover?
• When rodding the bottom layer, how should the tamping rod be positioned?
• True or False: It is acceptable to measure the temperature of concrete in a wheelbarrow.
• What action should be taken if there is a slight deficiency in concrete quality after consolidation?
• If the concrete sample is to be consolidated by rodding, the measure is filled in how many layers?
• Before beginning the slump test, the slump mold should be in what condition?
• ASTM C231/C231M pertains to which aspect of freshly mixed concrete?
• What should be done if the air content exceeds 9% when using the measuring cup?
• How should the tamping rod be used to achieve uniformity across the layers?
• What should be done if there is an excessive amount of concrete in the measure after consolidation?
• Is there a maximum temperature specified for freshly mixed concrete in ASTM C1064?
• How much concrete is allowed to be removed from around the base of the mold before lifting?
• What effect does rapid evaporation have on the concrete sample?
• What is the minimum allowable capacity of the measuring bowl specified for the test method?
• What must be avoided when raising the slump mold?
• Which method is used for consolidating concrete with a slump lower than 1 inch?
• What should be ensured about the tamping rod when rodding each layer?
• How soon should tests for slump, temperature, and air content begin after obtaining the final portion of the composite sample?
• What is required for a tamping rod to be suitable for use in the slump test?