ACI CERTIFICATION
PRACTICE EXAM QUESTIONS
T/F: The method of determining Air content of concrete contAining lightweight AggregAte is
the pressure method - CORRECT ANSWER -FAlse
T/F: When mAking A test cylinder from concrete being used in construction, the field
techniciAn must Also meAsure the slump of the concrete. - CORRECT ANSWER -True
While the techniciAn is checking the slump of the concrete, there is A decided fAlling AwAy
or sheAring off of the concrete from one side of the sAmple. WhAt should the techniciAn
do? - CORRECT ANSWER -DisregArd the test And retest on Another portion of the sAmple
PrepArAtion of specimens for trAnsport includes: - CORRECT ANSWER -DeterminAtion thAt
At leAst 8 hours hAs elApsed since finAl set
If the AggregAte correction fActor for A given source of fine And coArse AggregAte is found
to be .2% in A pressure Air meter, And An Air content vAlue of 5% is reAd on the gAge of the
sAme Air meter contAining concrete with the sAme AggregAte, whAt is the correct Air
content? - CORRECT ANSWER -4.8%
Strength test specimens trAnsported from the field to the testing lAborAtory must be -
CORRECT ANSWER -Protected from jArring, Protected from moisture loss, And Protected
from freezing
Tests for slump And Air content must be stArted within ____ min After obtAining the finAl
portion of the composite sAmple - CORRECT ANSWER -5 min
The minimum size for sAmples to be used for strength tests is - CORRECT ANSWER -28L (1
ft^2)
