ACI Concrete Exam Questions And Answers
Graded A+
The temperature measuring device shall have an accuracy of _____ throughout a range of __ to ___
+/- 1F Degree; 30F to 120F
Place the thermometer in a sample with a minimum of _____ cover.
3 inches
Leave the thermometer in for a minimum of ____ and a maximum of _____.
2 minutes; 5 minutes
Read and record to the temperature to the nearest _____
1 degree F
Do not remove the TMD from the concrete when reading the temperature. T/F
True
Temperature measuring device shall be verified ______, or _________.
Annually; whenever there is a question of accuracy
Before sampling concrete, make sure all _____ and _____ are added
Water; Admixtures
Regulate the rate of discharge of the concrete by the _____ and not the size of the _____.
rate of revolution of the drum; gate opening
When sampling from revolving truck mixer, sample the concrete at least _____ regularly spaced
intervals from the _____ (not exceeding _____ minutes).
two; middle of the load; 15 minutes
Obtain the sample by repeatedly pass a receptacle through the _____ or completely divert the _____
into the sample container.
entire discharge stream; discharge stream
Once a sample is obtained, transport to _____ and _____.
the place where the test will be performed; remix with a shovel for composite sample
Strength test cylinders require a minimum sample size of _____.
1 Cubic Foot
If the concrete contains aggregate larger than that appropriate for the size of the molds or
equipment, _____.
Wet-sieve the sample
, When wet-sieving, _____ any mortar _____ .
scrape; adhering to the sides of the wet-sieve equipment.
It's good practice to _____ before any test.
Remix
Start temperature, slump and air tests within _____.
5 minutes
Start making cylinders within _____ after fabricating the composite sample.
15 minutes
Concrete from a paving mixer, obtain samples from at least _____ and then _____.
5 different portions of the pile; composite into one example.
Slump test is not applicable to ______ and _____ concrete.
Non-plastic; non-cohesive
Slump mold shape is that of a _____ of a _____.
Frustrum; cone
Slump test base must be _____, _____, _____, and _____.
non-absorbent, flat, moist, rigid
Start slump test within _____ and complete the test within _____.
5 minutes; 2.5 minutes
Slump mold to be filled in _____ equal layers by _____.
three; volume
Slump mold, rod each layer _____ times.
25
For the 2nd and 3rd layers of the slump test, penetrate the previous layer approximately _____.
1 inch.
Third layer should _____ before rodding is started.
heap above the top of mold
Strike-off concrete level with top of mold using a tamping rod using a _____ and _____ motion.
screeding; rolling.
Graded A+
The temperature measuring device shall have an accuracy of _____ throughout a range of __ to ___
+/- 1F Degree; 30F to 120F
Place the thermometer in a sample with a minimum of _____ cover.
3 inches
Leave the thermometer in for a minimum of ____ and a maximum of _____.
2 minutes; 5 minutes
Read and record to the temperature to the nearest _____
1 degree F
Do not remove the TMD from the concrete when reading the temperature. T/F
True
Temperature measuring device shall be verified ______, or _________.
Annually; whenever there is a question of accuracy
Before sampling concrete, make sure all _____ and _____ are added
Water; Admixtures
Regulate the rate of discharge of the concrete by the _____ and not the size of the _____.
rate of revolution of the drum; gate opening
When sampling from revolving truck mixer, sample the concrete at least _____ regularly spaced
intervals from the _____ (not exceeding _____ minutes).
two; middle of the load; 15 minutes
Obtain the sample by repeatedly pass a receptacle through the _____ or completely divert the _____
into the sample container.
entire discharge stream; discharge stream
Once a sample is obtained, transport to _____ and _____.
the place where the test will be performed; remix with a shovel for composite sample
Strength test cylinders require a minimum sample size of _____.
1 Cubic Foot
If the concrete contains aggregate larger than that appropriate for the size of the molds or
equipment, _____.
Wet-sieve the sample
, When wet-sieving, _____ any mortar _____ .
scrape; adhering to the sides of the wet-sieve equipment.
It's good practice to _____ before any test.
Remix
Start temperature, slump and air tests within _____.
5 minutes
Start making cylinders within _____ after fabricating the composite sample.
15 minutes
Concrete from a paving mixer, obtain samples from at least _____ and then _____.
5 different portions of the pile; composite into one example.
Slump test is not applicable to ______ and _____ concrete.
Non-plastic; non-cohesive
Slump mold shape is that of a _____ of a _____.
Frustrum; cone
Slump test base must be _____, _____, _____, and _____.
non-absorbent, flat, moist, rigid
Start slump test within _____ and complete the test within _____.
5 minutes; 2.5 minutes
Slump mold to be filled in _____ equal layers by _____.
three; volume
Slump mold, rod each layer _____ times.
25
For the 2nd and 3rd layers of the slump test, penetrate the previous layer approximately _____.
1 inch.
Third layer should _____ before rodding is started.
heap above the top of mold
Strike-off concrete level with top of mold using a tamping rod using a _____ and _____ motion.
screeding; rolling.
