Exam (elaborations)
ACI Concrete Test 2023 Questions and Answers
- Course
- Institution
ACI Concrete Test 2023 Questions and Answers
[Show more]
Content preview
ACI Concrete Test 2023 Questions and Answers T/F: a liquid in glass thermometer that is certifiably accurate and traceable to the NIST is required to verify concrete thermometers - Answer- TrueT/F: The Thermometer must remain in concrete for a minimum of 3 minutes - Answer- False
T/F: ASTM 1064 requires a composite sample - Answer- False
A thermometer can be used to record temperature if
b) Thermometer is new
B) Verified within one year after there was question of accuracy c) Accurate within 1 degree Fahrenheit
d) All of the above e) B and C only - Answer- e) B and C only
Place the thermometer in concrete a minimum of a) 1" b) 2"
c) 3"
d) 4" - Answer- c) 3"
If aggregate concrete is less than 3" leave thermometer in concrete in test:
a) 5 mins
b) 10 mins
c) Minimum of 2 mins
d) maximum of 5 mins
e) both c and d - Answer- e) both c and d
How should you press the concrete around the thermometer? - Answer- Gently
Record the temperature to the nearest ___ degree - Answer- 1 degree
Temperature measuring device should be verified _____________ or whenever there is
a question of___________. - Answer- Annually; Accuracy
What must occur before a sample of concrete can be taken from a revolving drum mixer? - Answer- All water and admixtures must be added to the mixer
When sampling from a stationary of revolving drum mixer,, what is collected and when is it taken during discharge? - Answer- Two or more portions of concrete; at regularly spaced intervals; from the middle of the batch When sampling from a stationary or revolving drum mixer sample portions are obtained by a) repeatedly passing a receptacle through the center of a discharge stream b) completely diverting the discharge steam into sample container c) Repeatedly passing a receptacle through the entire discharge stream d) both a & b
e) Both b & c - Answer- - e) Both b & c
Describe the procedure for collecting a sample from a paving mixer - Answer- Discharge the contents of the paving mixer; obtain samples from at least five different portions of the pile
What is the minimum size for a sample when strength test specimens are molded - Answer- 1 cubic foot
What action is required after the individual concrete samples have been transported to the place where tests are to be preformed? - Answer- Combine and remix the samples with a shovel
What should be done if the concrete contains an aggregate larger than is appropriate for the size of the molds or equipment being used - Answer- Wet Sieving
Start the test for slump, temperature, and air content within how many minutes after obtaining the final portion of the composite sample - Answer- 5 mins
Start molding specimens for strength tests within how many minutes after fabricating the
composite sample - Answer- 15 mins
From what must the concrete sample be protected - Answer- Sun wind and rapid evaporation; contamination
T/F: Remove the thermometer just before you read and record temperature - Answer- False
The temperature for concrete a) Must not exceed 90 degrees/
b) Must not be below 40 degrees
c) Must be within 10 degrees of ambient temperature
d) Is determined by the specific contract documents for project - Answer- d) Is determined by the specific contract documents for the project
is it acceptable to measure temperature of freshly mixed concrete in a) A wheelbarrow b) transporting equitment c) forms
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller millyphilip. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81531 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now