ACI Practice Test Questions with
Complete Solutions11
Sampling Freshly Mixed Concrete:
The elapse time shall not exceed _____ minutes between obtaining the first and final portions
of the composite sample. - ANSWERS-15
Sampling Freshly Mixed Concrete:
How many portions shall be taken from a revolving drum mixer for a sample of freshly mixed
concrete? - ANSWERS-2 or more
sampling freshly mixed concrete:
When sampling from a pile that has been discharged from a paving mixer, obtain samples from
at least ___different portions of the pile. - ANSWERS-5
sampling freshly mixed concrete:
Make the samples to be used for strength tests a minimum of __________. - ANSWERS-1.0 ft³
sampling freshly mixed concrete:
, When sampling from revolving drum truck mixers the sample will be taken from ______. -
ANSWERS-two or more regularly spaced intervals during the discharge of the middle portion of
the batch.
sampling freshly mixed concrete:
T/F: When sampling from a revolving drum mixer, sample by repeatedly passing a receptacle
through the entire discharge stream or by completely diverting the discharge into a sample
container. - ANSWERS-T
sampling freshly mixed concrete:
Samples to be used for routine air content and slump tests may be taken from the load after
_______ has been discharged. - ANSWERS-1/4 cubic yard of concrete
sampling freshly mixed concrete:
Protect samples from: - ANSWERS-Contamination, sun, wind
sampling freshly mixed concrete:
T/F: If the concrete contains aggregate larger than that appropriate for the size of the molds or
test equipment, wet-sieve the sample before performing unit weight test for yield. - ANSWERS-F
Making and Curing Test Specimens:
Molds shall _________________. - ANSWERS-be watertight during use and hold their
dimensions and shape under conditions of use
Complete Solutions11
Sampling Freshly Mixed Concrete:
The elapse time shall not exceed _____ minutes between obtaining the first and final portions
of the composite sample. - ANSWERS-15
Sampling Freshly Mixed Concrete:
How many portions shall be taken from a revolving drum mixer for a sample of freshly mixed
concrete? - ANSWERS-2 or more
sampling freshly mixed concrete:
When sampling from a pile that has been discharged from a paving mixer, obtain samples from
at least ___different portions of the pile. - ANSWERS-5
sampling freshly mixed concrete:
Make the samples to be used for strength tests a minimum of __________. - ANSWERS-1.0 ft³
sampling freshly mixed concrete:
, When sampling from revolving drum truck mixers the sample will be taken from ______. -
ANSWERS-two or more regularly spaced intervals during the discharge of the middle portion of
the batch.
sampling freshly mixed concrete:
T/F: When sampling from a revolving drum mixer, sample by repeatedly passing a receptacle
through the entire discharge stream or by completely diverting the discharge into a sample
container. - ANSWERS-T
sampling freshly mixed concrete:
Samples to be used for routine air content and slump tests may be taken from the load after
_______ has been discharged. - ANSWERS-1/4 cubic yard of concrete
sampling freshly mixed concrete:
Protect samples from: - ANSWERS-Contamination, sun, wind
sampling freshly mixed concrete:
T/F: If the concrete contains aggregate larger than that appropriate for the size of the molds or
test equipment, wet-sieve the sample before performing unit weight test for yield. - ANSWERS-F
Making and Curing Test Specimens:
Molds shall _________________. - ANSWERS-be watertight during use and hold their
dimensions and shape under conditions of use
