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ACI Concrete Oral Exam Questions and Tests with complete solutions
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ACI Concrete Oral Exam Questions and Tests with complete solutions
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ACI Concrete Oral Exam Questions and Tests with complete solutionsWhat must occur before a sample of concrete can be taken from a revolving drum mixer? - Answer- All Of The Water Must Be Added To The Mixer
Describe the different procedures that can be used to collect a sample of concrete from a stationary or revolving drum mixer. - Answer- Repeatedly Pass A Receptacle Through
The Entire Discharge Stream
Completely Divert The Discharge Stream Into A Sample Container
What are the required steps for collecting a sample of concrete from a stationary or revolving drum mixer? - Answer- Collect Two Or More Portions Of Concrete
Take The Portions At Regularly Spaced Intervals
Take The Portions From The Middle Of The Batch
Describe the procedure for collecting a sample of pavement concrete deposited on grade. - Answer- Discharge The Contents Of The Paving Mixer
Obtain Samples From At Least Five Different Portions Of The Pile
What is the minimum size for a sample when strength test specimens are to be molded? - Answer- 28 L (1 Cu.ft.)
What is the maximum allowable time between obtaining the first and final portions of the
composite sample? - Answer- 15 Minutes
What is required after the concrete sample has been transported to the place where tests are to be performed? - Answer- Combine And Remix The Sample With A Shovel
What should be done if the concrete contains aggregate larger than is appropriate for the size of the molds or equipment being used? - Answer- Wet Sieving
Start the tests for slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample? - Answer- 5 Minutes
Start molding specimens for strength tests within how many minutes after fabricating the
composite sample? - Answer- 15 Minutes
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