ACI Grade 1 Field Testing Certification
Practice Test - Irving
For concrete with aggregates less than 3 inches, the thermometer must remain in the fresh
concrete sample a minimum of 5 minutes or until the temperature reading stabilizes. (T or F)
- ANSFalse (2-5 minutes)
The temperature measuring device must be accurate to within 0.1 degree. (T or F) - ANS
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete throughout a range of _____ to _____ degree F ( ______ to ______
degree C) - ANS30 to 120 degree F ( 0 to 50 degree C)
A composite sample is not needed if only the temperature test is being run. (T or F) -
ANSTrue
The temperature of fresh concrete in a placement must be measured by inserting a
thermometer into the top six inches of concrete. (T or F) - ANSFalse (3 in.)
The temperature of the concrete is recorded to the nearest ______ degree F (______
degree C) - ANS1 degree F (0.5 degree C)
ASTM C1064 states the container used to measure temperature of concrete must be large
enough to provide at least 5 inches of concrete around the sensor. (T or F) - ANS
Calibrate the temperature measuring device at least __________, or whenever there is a
question of accuracy. - ANSAnnually
After the thermometer is placed in the concrete: - ANSGently press concrete around the
thermometer
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANSVerify conformance
It is allowable to remove the temperature measuring devices from the freshly mixed concrete
to read the temperature if you cannot see the reading. (T or F) - ANSFalse
The maximum allowable time between obtaining the first and last portions of the composite
sample may not exceed 5 minutes. (T or F) - ANSFalse
Start molding specimens for strength tests within 30 minutes after fabricating the composite
sample. (T or F) - ANSFalse (15 mins)
, The composite concrete sample must be protected from sun, wind, contamination and rapid
evaporation. (T or F) - ANSFalse (Contamination and rapid evaporation)
If the concrete contains aggregates larger than those that are appropriate for a size of mold
or equipment used, the sample should be wet-sieved before making the test. (T or F) -
ANSFalse (wet screened)
The composite sample not be remixed before beginning any tests. (T or F) - ANSFalse
Sampling should normally be performed, as the concrete is discharged from the mixer. (T or
F) - ANSTrue
ASTM Method C172 includes the sampling from stationary mixers, paving mixers, truck
mixers, agitators, and non-agitating equipment. (T or F) - ANSTrue
After sampling is completed, start the tests for slump and air content within: - ANSNone of
the above (5 mins)
In any case, do not obtain samples until: - ANSAll the water and admixtures have been
added to the concrete
No samples shall be taken before ______ or after ______ of the batch has been discharged.
- ANS
When strength tests are to be made, the minimum size of the composite sample shall be: -
ANS1 cubic foot
Sample the concrete from the chute of a truck mixer by: - ANS
Fresh concrete to be tested at the job site should be sampled from: - ANSTwo or more
regularly spaced intervals during discharge of the middle portion of the batch
The elapsed time between obtaining the first and final portions of the composite sample,
according to ASTM C172, shall not exceed: - ANSNone of the above
The sides of the slump cone should be tapped with the mallet to consolidate the concrete in
the mold. (T or F) - ANSFalse
For the slump test, when Rodding the second layer and the top layer, the tamping rod should
just penetrate into the underlying layer. (T or F) - ANSTrue
According to ASTM C143, it is permissible to use a mold, which clamps to a non-absorbent
base. (T or F) - ANSTrue
When filling the final layer of the slump cone, never heap the concrete above the top of the
mold. (T or F) - ANSFalse
Practice Test - Irving
For concrete with aggregates less than 3 inches, the thermometer must remain in the fresh
concrete sample a minimum of 5 minutes or until the temperature reading stabilizes. (T or F)
- ANSFalse (2-5 minutes)
The temperature measuring device must be accurate to within 0.1 degree. (T or F) - ANS
The temperature measuring device shall have a capacity of measuring temperature of
freshly mixed concrete throughout a range of _____ to _____ degree F ( ______ to ______
degree C) - ANS30 to 120 degree F ( 0 to 50 degree C)
A composite sample is not needed if only the temperature test is being run. (T or F) -
ANSTrue
The temperature of fresh concrete in a placement must be measured by inserting a
thermometer into the top six inches of concrete. (T or F) - ANSFalse (3 in.)
The temperature of the concrete is recorded to the nearest ______ degree F (______
degree C) - ANS1 degree F (0.5 degree C)
ASTM C1064 states the container used to measure temperature of concrete must be large
enough to provide at least 5 inches of concrete around the sensor. (T or F) - ANS
Calibrate the temperature measuring device at least __________, or whenever there is a
question of accuracy. - ANSAnnually
After the thermometer is placed in the concrete: - ANSGently press concrete around the
thermometer
According to ASTM C1064, what is one reason to take the temperature of concrete? -
ANSVerify conformance
It is allowable to remove the temperature measuring devices from the freshly mixed concrete
to read the temperature if you cannot see the reading. (T or F) - ANSFalse
The maximum allowable time between obtaining the first and last portions of the composite
sample may not exceed 5 minutes. (T or F) - ANSFalse
Start molding specimens for strength tests within 30 minutes after fabricating the composite
sample. (T or F) - ANSFalse (15 mins)
, The composite concrete sample must be protected from sun, wind, contamination and rapid
evaporation. (T or F) - ANSFalse (Contamination and rapid evaporation)
If the concrete contains aggregates larger than those that are appropriate for a size of mold
or equipment used, the sample should be wet-sieved before making the test. (T or F) -
ANSFalse (wet screened)
The composite sample not be remixed before beginning any tests. (T or F) - ANSFalse
Sampling should normally be performed, as the concrete is discharged from the mixer. (T or
F) - ANSTrue
ASTM Method C172 includes the sampling from stationary mixers, paving mixers, truck
mixers, agitators, and non-agitating equipment. (T or F) - ANSTrue
After sampling is completed, start the tests for slump and air content within: - ANSNone of
the above (5 mins)
In any case, do not obtain samples until: - ANSAll the water and admixtures have been
added to the concrete
No samples shall be taken before ______ or after ______ of the batch has been discharged.
- ANS
When strength tests are to be made, the minimum size of the composite sample shall be: -
ANS1 cubic foot
Sample the concrete from the chute of a truck mixer by: - ANS
Fresh concrete to be tested at the job site should be sampled from: - ANSTwo or more
regularly spaced intervals during discharge of the middle portion of the batch
The elapsed time between obtaining the first and final portions of the composite sample,
according to ASTM C172, shall not exceed: - ANSNone of the above
The sides of the slump cone should be tapped with the mallet to consolidate the concrete in
the mold. (T or F) - ANSFalse
For the slump test, when Rodding the second layer and the top layer, the tamping rod should
just penetrate into the underlying layer. (T or F) - ANSTrue
According to ASTM C143, it is permissible to use a mold, which clamps to a non-absorbent
base. (T or F) - ANSTrue
When filling the final layer of the slump cone, never heap the concrete above the top of the
mold. (T or F) - ANSFalse
