ACI Written Exam
The sensor of the temperature measuring device shall have at least ____ inches of
concrete cover in all directions. - ANS-3"
The temperature measuring device shall have a capacity or measuring freshly mixed
concrete to the nearest ________F. - ANS-1 degree
The temperature measuring device shall be calibrated ________, or whenever there is
a question of its ____________________. - ANS-Annual, Accuracy
The concrete temperature is read to the nearest ___________F. - ANS-1 degree
The temperature measuring device shall have a range of ______F to _________F. -
ANS-30,120
The temperature may be measured in a wall form - ANS-True
The temperature measuring device must remain in the concrete for a minimum of? -
ANS-2 minutes
With large aggregate of 3" diameter the concrete temperature may take up to twenty
minutes to stabilize due to heat transfer from the aggregate to the cement paste. -
ANS-True
The maximum time allowable time in between obtaining the first and final portion of a
composite sample is? - ANS-15 minutes
The minimum size of a composite sample required when strength specimens are to be
molded - ANS-1 cf
Sampling form a stationary mixer or revolving drum mixer, the batch must be sampled at
_____ or more regularly spaced intervals - ANS-3
The composite sample for a paving mixer must represent a minimum of _____ different
portions of the batch of concrete taken from the pile after discharge. - ANS-5
The test for slump, temperature, and air content must begin within ____ minutes after
fabricating the composite sample. - ANS-5
, The sample should be combined and remixed before testing begins. - ANS-True
Composite samples must be taken before any water is added. - ANS-False
The composite sample from a truck mixer is taken from the _____ portion of the batch. -
ANS-Middle
The slump test is applicable to concrete having a nominal maximum aggregate size of
____ in. - ANS-2"
The slump mold is filled in ____ layers of equal volume. - ANS-3
The sample of concrete used for the test must be obtained in accordance to ASTM
_____. - ANS-C172
Each layer should be rodded _______ times. - ANS-25
The sides of the slump cone should be lightly tapped after rodding each layer. -
ANS-False
The slump cone cannot be made of any other material but metal. - ANS-False
The tamping rod should penetrate the previous layer approximately ___________. -
ANS-1"
When rodding the bottom layer, the tamping rod should be _____ to uniformly distribute
the strokes. - ANS-held on a slight incline
The slump cone must be raised of the concrete in _________ seconds - ANS-3-7
seconds
The approximate depth of concrete after the second layer has been rodded is
_____inches. - ANS-6-1/8"
The slump cone must be raised n 5 seconds +/- 2 seconds. - ANS-True
The slump is measured to the ________of the concrete sample. - ANS-Displaced
Original Center
The sensor of the temperature measuring device shall have at least ____ inches of
concrete cover in all directions. - ANS-3"
The temperature measuring device shall have a capacity or measuring freshly mixed
concrete to the nearest ________F. - ANS-1 degree
The temperature measuring device shall be calibrated ________, or whenever there is
a question of its ____________________. - ANS-Annual, Accuracy
The concrete temperature is read to the nearest ___________F. - ANS-1 degree
The temperature measuring device shall have a range of ______F to _________F. -
ANS-30,120
The temperature may be measured in a wall form - ANS-True
The temperature measuring device must remain in the concrete for a minimum of? -
ANS-2 minutes
With large aggregate of 3" diameter the concrete temperature may take up to twenty
minutes to stabilize due to heat transfer from the aggregate to the cement paste. -
ANS-True
The maximum time allowable time in between obtaining the first and final portion of a
composite sample is? - ANS-15 minutes
The minimum size of a composite sample required when strength specimens are to be
molded - ANS-1 cf
Sampling form a stationary mixer or revolving drum mixer, the batch must be sampled at
_____ or more regularly spaced intervals - ANS-3
The composite sample for a paving mixer must represent a minimum of _____ different
portions of the batch of concrete taken from the pile after discharge. - ANS-5
The test for slump, temperature, and air content must begin within ____ minutes after
fabricating the composite sample. - ANS-5
, The sample should be combined and remixed before testing begins. - ANS-True
Composite samples must be taken before any water is added. - ANS-False
The composite sample from a truck mixer is taken from the _____ portion of the batch. -
ANS-Middle
The slump test is applicable to concrete having a nominal maximum aggregate size of
____ in. - ANS-2"
The slump mold is filled in ____ layers of equal volume. - ANS-3
The sample of concrete used for the test must be obtained in accordance to ASTM
_____. - ANS-C172
Each layer should be rodded _______ times. - ANS-25
The sides of the slump cone should be lightly tapped after rodding each layer. -
ANS-False
The slump cone cannot be made of any other material but metal. - ANS-False
The tamping rod should penetrate the previous layer approximately ___________. -
ANS-1"
When rodding the bottom layer, the tamping rod should be _____ to uniformly distribute
the strokes. - ANS-held on a slight incline
The slump cone must be raised of the concrete in _________ seconds - ANS-3-7
seconds
The approximate depth of concrete after the second layer has been rodded is
_____inches. - ANS-6-1/8"
The slump cone must be raised n 5 seconds +/- 2 seconds. - ANS-True
The slump is measured to the ________of the concrete sample. - ANS-Displaced
Original Center
