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ACI New 2023 /44 Questions And Answers Download To Pass!!!
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ACI New 2023 /44 Questions And AnswersDownload To Pass!!!
Quiz :According to ASTM C 1064, leave the temp. measuring device in freshly
mixed concrete a minimum period of ?????, or until temp. reading stabalizes. -
Answer :2 Minutes
Quiz :The temp measurement of the concrete sample must be recorded to the
nearest? - Answer :1 degree F
Quiz :Temp measurement of freshly mixed concrete must be completed within
???? after obtaining the sample. - Answer :5 minutes
Quiz :Is the following statement true or false? According to ASTM C 1064,
composite samples are required even if the only purpose for obtaining the
sample is to determine temperature. - Answer :False
Quiz :Which one of the following statements pertaining to ASTM C 1064
Standard Test Method for Temperature of Freshly Mixed Hydrolic-Cement
Concrete is true? - Answer :When concrete contains a nominal maximum size
of aggregate greater than 3 inches make sure the temperature has stabilized
before recording the reading
Quiz :According to ASTM C 172, the minimum size of the sample to be used for
strength tests is : - Answer :1.0 ft
Quiz :Some test procedures require that concrete be sieved prior to testing.
After the larger aggregate particles have been removed, the batch is: - Answer
:Remixed with a shovel prior to testing
Quiz :When sampling from a paving mixer, ASTM C 172 permits the composite
sample to be obtained: - Answer :From 5 different portions of the pile after
the concrete has been discharged
Quiz :The elapsed time between obtaining the first and final portions of the
composite sample shall not exceed: - Answer :5 minutes
Quiz :The tests for slump or air content, or both, must be started within ????
after obtaining the final portion of the composite sample. - Answer :15
minutes
, Quiz :When sampling from a stationary mixer, except for paving mixer, the
technician can assure a representative sample by: - Answer :Passing a
receptacle completely through the discharge stream
Quiz :To obtain a representative sample from a revolving drum truck mixer,
regulate the rate of discharge by: - Answer :Adjusting the rate of the
revolution of the drum
Quiz :Start molding specimens for strength tests withing ???? after preparing
the composite sample. - Answer :15 minutes
Quiz :When performing a slump test, a concrete sample with 2 in. maximum
size aggregate requires which one of the following: - Answer :Removal of
aggregate over 1 1/2 inches in accordance with C 172
Quiz :The slump test mold is filled in 3 layers of : - Answer :Approximately
equal volume
Quiz :Complete the entire text from the start of the filling through removal of
the mold without interruption within an elapsed time of: - Answer :2 1/2
minutes
Quiz :If the concrete slump measures 4-5/16 in., the recorded slump would
be: - Answer :4 1/4 inches
Quiz :If a slump cone made of material other than metal is suspected of being
out of tolerance from its manufactured condition, a single comparative test
shall be performed using a metal slump cone. The mold shall be removed from
service if the test results from the metal slump cone differ by more than: -
Answer :1.5 inches
Quiz :After the top layer has been rodded, the surface of the concrete is struck
off be means of : - Answer :A screeding and rolling motion of the tamping rod
Quiz :ASTM C 143 is not considered applicable to: - Answer :Non-plastic and
non-cohesive concrete
Quiz :If a decided falling-away or shearing-off of concrete from one side or a
portion of the mass occurs after lifting the slump test mold: -
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