ACI Field Grade One 83 Questions with Correct Answers 100% Verified
Sampling:
The maximum allowable time between obtaining the first and final portions of a composite sample
is: - Correct Answers 15 minutes
Sampling:
T/F: Concrete samples must be obtained before any water or admixtures are added to the mixture at the job site - Correct Answers False
Sampling:
When sampling from a paving mixer, obtain samples from at least ___ different portions of the pile and combine them into one composite sample for test purposes - Correct Answers 5
Sampling:
When sampling from a revolving dump truck, how many portions should be collected? - Correct Answers 2 or more
Sampling:
T/F: Samples for strength should be taken before 10% or after 90% of the batch has been discharged
- Correct Answers False
Sampling:
The concrete sample must be protected from ____and ____ - Correct Answers sun and wind
Sampling:
Portions for a composite sample shall be combined and thoroughly remixed before beginning tests - Correct Answers True
Sampling:
What is the minimum sample size? - Correct Answers 1 ft^3
Sampling: 1 / 2
T/F: samples smaller than 1 ft^3 are allowed on routine air content, temp, and slump tests - Correct Answers False
Sampling:
after obtaining the final portion of the composite sample, the maximum allowable time before beginning tests for slump, temp, and air cont is ____ - Correct Answers 5 minutes
Sampling:
Start molding strength samples within ___ mins after fabricating the composite sample - Correct Answers 15 mins
Sampling:
When the concrete contains aggregate larger than permitted for a particular test method, the sample of concrete can be _____ before testing - Correct Answers wet
Sampling:
Can a 2" coarse aggregate concrete sample for unit testing be wet sieved? - Correct Answers No
Sampling:
What are 5 types of equipment this standard covers for sampling? - Correct Answers Non-agitating equipment Agitating equipment stationary equipment truck mixtures paving equipment continuous mixers
Temperature:
T/F: A composite sample is not required for measuring the temperature of fresh concrete - Correct Answers True
Temperature:
Can temp be measured in the formwork? - Correct Answers yes
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