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ACI Concrete Oral Exam Questions and Tests with Answers
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ACI Concrete Oral Exam Questions and Tests with Answers
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ACI Concrete Oral Exam Questionsand Tests with Answers
What must occur before a sample of concrete can be taken from a revolving
drum mixer? - -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. - -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? - -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. - -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? - -28 L (1 Cu.ft.)
-What is the maximum allowable time between obtaining the first and final
portions of the composite sample? - -15 Minutes
-What is required after the concrete sample has been transported to the
place where tests are to be performed? - -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? - -Wet
Sieving
-Start the tests for slump, temperature, and air content within how many
minutes after obtaining the final portion of the composite sample? - -5
Minutes
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