Prime Cm&s - Columbus Office - Field Technician Quiz
Prime CM&S
Annual Refresher Training on Concrete Testing and Vehicle Care.
Any Prime CM&S (Columbus) staff who submit concrete testing reports to the desk of Andy Hood must complete this quiz.
- 1.
If a vehicle not functioning/driving properly it is YOUR responsibility to relay the issue to the lab manager.
- A.
True, the lab manager cannot address issues with Prime's trucks in a timely manner if the issues are not relayed to him.
- B.
False, the lab manager inspects each truck to make sure they are working properly each day.
Correct Answer
A. True, the lab manager cannot address issues with Prime's trucks in a timely manner if the issues are not relayed to him.Explanation
The given answer is true because it states that if a vehicle is not functioning or driving properly, it is the responsibility of the individual to inform the lab manager about the issue. This is important because the lab manager cannot address these issues in a timely manner if they are not made aware of them. By relaying the problem to the lab manager, they can take the necessary steps to address and resolve the issues with Prime's trucks.Rate this question:
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- 2.
ASTM C31 states that the strike bar is an acceptable tool for the finishing procedure of crafting concrete cylinders.
- A.
True, C31 states this is one of the many tools acceptable for finishing cylinders
- B.
False, C31 states that the only tools to be used for finishing the concrete cylinder are either a hand-trowel or the tamping rod.
Correct Answer
B. False, C31 states that the only tools to be used for finishing the concrete cylinder are either a hand-trowel or the tamping rod. -
- 3.
The slump cone is filled in how many lifts?
- A.
1
- B.
2
- C.
3
Correct Answer
C. 3Explanation
The slump cone is filled in three lifts. This means that the concrete mixture is poured into the cone in three separate stages or increments. Filling the cone in multiple lifts allows for better compaction and ensures that the concrete is evenly distributed throughout the cone. This method helps to achieve accurate and consistent results when measuring the slump of the concrete, which is an important factor in determining its workability and consistency.Rate this question:
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- 4.
The slump cone and base should be dampened prior to testing.
- A.
True, the equipment for all both air and slump tests should be dampened prior to testing.
- B.
False, a dry cone is a good cone.
Correct Answer
A. True, the equipment for all both air and slump tests should be dampened prior to testing.Explanation
Dampening the slump cone and base prior to testing is important because it helps to prevent the concrete mix from sticking to the equipment. This ensures that the slump test results are accurate and representative of the actual workability of the concrete. Similarly, dampening the equipment for air tests is necessary to create a proper seal and prevent air leakage during the test. Therefore, it is true that the equipment for both air and slump tests should be dampened prior to testing.Rate this question:
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- 5.
Who's responsibility is it to provide a "suitable curing environment" for concrete specimens initial cure?
- A.
The lab manager
- B.
Joe Warino
- C.
The inspector
- D.
The contractor
Correct Answer
D. The contractorExplanation
The responsibility to provide a suitable curing environment for concrete specimens initial cure lies with the contractor. This is because the contractor is responsible for the construction process and ensuring that the concrete is properly cured to achieve its desired strength and durability. The contractor needs to follow appropriate curing methods such as maintaining the right temperature, moisture, and protection from external factors to ensure the concrete cures effectively.Rate this question:
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- 6.
If a "pour release form" is utilized for the concrete you are testing, the pour release number should be written where on your reports?
- A.
On the back of the daily report
- B.
On both the field testing worksheet and the specimen cards for each set of cylinders
- C.
On the top of the cylinder molds
Correct Answer
B. On both the field testing worksheet and the specimen cards for each set of cylindersExplanation
The pour release number should be written on both the field testing worksheet and the specimen cards for each set of cylinders. This ensures that the pour release number is properly documented and can be easily referenced in the future. Writing it on the back of the daily report or on the top of the cylinder molds may not provide the same level of clarity and organization as writing it on the field testing worksheet and specimen cards.Rate this question:
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- 7.
If the contractor cannot or will-not provide a suitable curing environment, then Prime is prepared to bring which of the following to the site?
- A.
Cure box/cooler
- B.
Heating/Cooling devices depending on the overnight temperatures
- C.
A high/low thermometer
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
If the contractor is unable or unwilling to provide a suitable curing environment, Prime is prepared to bring all of the above options to the site. This means that they will bring a cure box/cooler, heating/cooling devices depending on the overnight temperatures, and a high/low thermometer. This ensures that the curing process can be properly controlled and monitored, regardless of the conditions on site.Rate this question:
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- 8.
What should be marked on the side of each cylinder?
- A.
The weather conditions, technician name and project address
- B.
The full project number, the size of the cylinder and the number of total roddings for that cylinder
- C.
The lab managers name, the inspectors name and any admixtures
- D.
The project name, the date and the set number
Correct Answer
D. The project name, the date and the set numberExplanation
On the side of each cylinder, the project name, the date, and the set number should be marked. This information is important for identification and tracking purposes, as it allows for easy reference and organization of the cylinders. The project name helps to associate the cylinder with a specific project, the date indicates when the cylinder was made, and the set number helps to differentiate between different sets of cylinders within the project.Rate this question:
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- 9.
Which of the follow tests must have occurred whenever a set of cylinders is made?
- A.
Slump Only
- B.
Air Only
- C.
Temperature Only
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
All of the above tests must have occurred whenever a set of cylinders is made because each test serves a different purpose in ensuring the quality and integrity of the cylinders. The slump test measures the consistency and workability of the concrete mix, the air test checks for the presence and amount of air entrained in the mix, and the temperature test monitors the temperature of the concrete during the curing process. By conducting all three tests, any potential issues or deviations in the concrete mix can be detected and addressed, resulting in stronger and more reliable cylinders.Rate this question:
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- 10.
How should the tamping rod be held when rodding the first (bottom) layer?
- A.
The first layer of a slump test is never rodded.
- B.
Slightly inclined.
- C.
The first layer should be rodded as vigorously as possible in a vertical motion to help settle the concrete.
Correct Answer
B. Slightly inclined.Explanation
The tamping rod should be held slightly inclined when rodding the first (bottom) layer. This allows for the concrete to be compacted evenly and helps in removing any air bubbles or voids. Holding the rod slightly inclined also prevents any splattering or segregation of the concrete during the rodding process.Rate this question:
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- 11.
It is acceptable to turn in dirty/sloppy reports
- A.
True
- B.
False, our testing reports go directly to our clients and need to be as presentable as possible each and every time. If a sloppy or messy report is turned in, it will need to be rewritten.
Correct Answer
B. False, our testing reports go directly to our clients and need to be as presentable as possible each and every time. If a sloppy or messy report is turned in, it will need to be rewritten.Explanation
Turning in dirty or sloppy reports is not acceptable because the testing reports are sent directly to clients and need to be presentable. If a report is messy or sloppy, it will have to be rewritten to ensure it meets the required standards of presentation.Rate this question:
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- 12.
What is the ideal overnight/initial curing temperature for concrete specimens
- A.
60°-80°f
- B.
There is no determined temperature, as long as it seems like the cylinders did not freeze it should probably be ok
- C.
45°-75°
Correct Answer
A. 60°-80°fExplanation
The ideal overnight/initial curing temperature for concrete specimens is 60°F-80°F. This temperature range provides optimal conditions for the concrete to cure and gain strength. Temperatures below 60°F may lead to slower curing and lower strength development, while temperatures above 80°F can cause rapid drying and potential cracking. It is important to maintain a controlled temperature within this range to ensure the proper curing and strength of the concrete specimens.Rate this question:
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- 13.
It is a good idea to carry extra testing sheets for compaction and concrete with you
- A.
True, unexpected work comes up all the time and it is best to be prepared and have the right paperwork available
- B.
False, unexpected work never happens
Correct Answer
A. True, unexpected work comes up all the time and it is best to be prepared and have the right paperwork availableExplanation
Carrying extra testing sheets for compaction and concrete is a good idea because unexpected work often arises in construction projects. Having the necessary paperwork readily available allows for efficient and effective testing and documentation, ensuring that the project can proceed smoothly without delays. Being prepared with extra testing sheets helps to avoid potential setbacks and ensures that all necessary testing can be conducted promptly. Therefore, it is advisable to carry extra testing sheets for compaction and concrete.Rate this question:
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- 14.
Layer numbers 2 & 3 should be rodded how far into the previous layer?
- A.
1-inch
- B.
14.6 %
- C.
Layer 2 = 3-inches, Layer 3 = 1.5-inches.
Correct Answer
A. 1-inchExplanation
Layer numbers 2 and 3 should be rodded 1 inch into the previous layer. The given information states that Layer 2 is 3 inches thick and Layer 3 is 1.5 inches thick. Since the question asks how far these layers should be rodded into the previous layer, the correct answer is 1 inch.Rate this question:
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- 15.
Concrete/cement likely dripped down the sides of the cylinder mold after the strike off procedure, what should be done next?
- A.
The concrete should be wiped off with a rag or the technicians glove so that the mold is both easier to strip and leaves less of a mess the following day.
- B.
Immediately place the cap on the mold and put it into the cure box.
Correct Answer
A. The concrete should be wiped off with a rag or the technicians glove so that the mold is both easier to strip and leaves less of a mess the following day.Explanation
After the strike off procedure, if concrete or cement has dripped down the sides of the cylinder mold, it is important to wipe it off with a rag or the technician's glove. This not only makes it easier to strip the mold but also reduces the mess that may be left behind the next day.Rate this question:
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- 16.
It is ok to test concrete without a current ACI certification.
- A.
True, there is no problem with testing concrete without an ACI certification
- B.
False, a valid ACI certification is critical when testing concrete. Testing results and specimens can be considered invalid if performed/crafted by a non-certified technician.
Correct Answer
B. False, a valid ACI certification is critical when testing concrete. Testing results and specimens can be considered invalid if performed/crafted by a non-certified technician. -
- 17.
The strike-bar should be used to screed and smooth the top of the slump cone.
- A.
True, no other tool is allowed.
- B.
The tamping rod is the only tool prescribed for smoothing the top of the slump cone.
Correct Answer
B. The tamping rod is the only tool prescribed for smoothing the top of the slump cone.Explanation
The tamping rod is the only tool prescribed for smoothing the top of the slump cone. This means that no other tool should be used for this purpose. The strike-bar, mentioned in the question, should not be used to screed and smooth the top of the slump cone. The tamping rod is specifically designed and recommended for this task.Rate this question:
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- 18.
A concrete pressure air-meter pot typically has a volume of...
- A.
1 - cubic foot
- B.
1/10 cubic foot
- C.
1/4 cubic foot
- D.
The Encyclopedia Britannica
Correct Answer
C. 1/4 cubic footExplanation
A concrete pressure air-meter pot typically has a volume of 1/4 cubic foot. This means that the pot is designed to hold and measure the volume of air that is entrapped in a given amount of concrete. The 1/4 cubic foot volume is a standard size for these pots and allows for accurate measurement of the air content in the concrete mixture.Rate this question:
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- 19.
The slump cone should be lifted in a vertical motion without twisting or rocking the cone within 2 seconds.
- A.
This is the correct amount of time to lift the slump cone.
- B.
The slump cone should be lifted in a steady motion between 3-7 seconds.
Correct Answer
B. The slump cone should be lifted in a steady motion between 3-7 seconds. -
- 20.
The slump should be measured down to the _______ __________ ________ and recorded to the nearest ______.
- A.
Previously Centered Part -&- 1 Inch
- B.
Shifted Over Concrete -&- 0.2"
- C.
Tallest Aggregate Piece -&- 0.15"
- D.
Displaced Original Center -&- 0.25"
Correct Answer
D. Displaced Original Center -&- 0.25"Explanation
The correct answer is "Displaced Original Center -&- 0.25"". This means that when measuring the slump, it should be measured down to the point where the original center of the concrete has been displaced, and the measurement should be recorded to the nearest 0.25 inches. This is important because it allows for accurate and consistent measurements of the slump, which is a measure of the consistency and workability of the concrete.Rate this question:
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- 21.
How far is the thermometer inserted into the fresh concrete when retrieving a temperature reading?1
- A.
1-Inch
- B.
2-Inches
- C.
3-Inches
- D.
4-Inches
Correct Answer
C. 3-InchesExplanation
The thermometer is inserted 3 inches into the fresh concrete when retrieving a temperature reading. This depth allows for an accurate measurement of the concrete's internal temperature, which is important for monitoring its curing process and ensuring the desired strength and durability of the final product. A deeper insertion may result in inaccurate readings, while a shallower insertion may not provide a representative temperature of the concrete's core.Rate this question:
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- 22.
How long should the thermometer remain submerged in the concrete before recording the temperature?
- A.
At least 2-minutes, no more than 5-minutes.
- B.
Between 30-seconds and 60-seconds
- C.
Whenever the needle has not moved for at least 10-seconds
Correct Answer
A. At least 2-minutes, no more than 5-minutes.Explanation
The thermometer should remain submerged in the concrete for at least 2 minutes, but no more than 5 minutes. This time frame ensures that the thermometer has enough time to accurately measure the temperature of the concrete. If the thermometer is removed too quickly, it may not provide an accurate reading. On the other hand, if it is left in for too long, the temperature reading may be affected by factors such as ambient temperature or heat transfer from the thermometer itself. Therefore, a window of 2 to 5 minutes is recommended for obtaining the most accurate temperature measurement.Rate this question:
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- 23.
What mark does the gauge need to be pumped to before releasing the chamber valve?
- A.
NM (Needle Mark)
- B.
IP (Initial Pressure)
- C.
SH (Start Here)
- D.
TT (Test Time)
Correct Answer
B. IP (Initial Pressure)Explanation
The gauge needs to be pumped to the Initial Pressure before releasing the chamber valve. This suggests that the gauge should be pumped to a certain pressure level before proceeding with the release of the chamber valve.Rate this question:
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- 24.
The Temperature should be recorded to the nearest 0.1°F
- A.
True
- B.
False, the temperature should be recorded to the nearest 1°F
Correct Answer
B. False, the temperature should be recorded to the nearest 1°FExplanation
The given answer is false because the statement in the question clearly states that the temperature should be recorded to the nearest 0.1°F, not 1°F. This means that the temperature should be measured and recorded with a decimal point, allowing for more precise measurements.Rate this question:
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- 25.
The air content should be recorded to the nearest...
- A.
0.1 %
- B.
1.0 %
- C.
0.25 %
- D.
.50-inch
Correct Answer
A. 0.1 %Explanation
The air content should be recorded to the nearest 0.1% because it is important to have accurate measurements of the air content in order to assess the quality and performance of the concrete. A small change in air content can have a significant impact on the strength and durability of the concrete. Therefore, recording the air content to the nearest 0.1% allows for precise monitoring and control of the concrete's properties.Rate this question:
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- 26.
What should be your first action after retrieving your composite sample from the concrete truck and wheeling it over to your testing area?
- A.
Ask the field inspector if he thinks the concrete looks good.
- B.
Place the first lift into both the slump cone and the air meter pot.
- C.
Immediately begin a volumetric air test.
- D.
Remix the composite sample with a scoop or shovel.
Correct Answer
D. Remix the composite sample with a scoop or shovel.Explanation
After retrieving the composite sample from the concrete truck and wheeling it over to the testing area, the first action should be to remix the composite sample with a scoop or shovel. This is important because during transportation, the components of the concrete may have settled or separated, leading to an inconsistent mixture. Remixing ensures that the sample is homogenous and representative of the entire batch. This will provide accurate results when conducting tests such as slump cone and air meter pot measurements.Rate this question:
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- 27.
The concrete remaining in the pot after testing can be remixed into the composite sample for use in further testing or crafting cylinders
- A.
True, this concrete is identical to the concrete in the wheel barrow and can be reused.
- B.
False, this concrete has had water added to it and is no longer representative of the composite sample.
Correct Answer
B. False, this concrete has had water added to it and is no longer representative of the composite sample.Explanation
The correct answer is false because adding water to the concrete in the pot changes its composition and properties. As a result, it is no longer representative of the composite sample that was initially tested. Therefore, it cannot be remixed into the composite sample for further testing or crafting cylinders.Rate this question:
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- 28.
The concrete from the slump test can be remixed back into the composite sample and used to conduct either an air test or to craft cylinders.
- A.
True, this concrete has not been altered in any way. Given that it is remixed into the composite sample, it can be reused.
- B.
False, the steel slump cone could have poisoned the concrete making it no longer suitable for testing.
Correct Answer
A. True, this concrete has not been altered in any way. Given that it is remixed into the composite sample, it can be reused.Explanation
The correct answer is True. The concrete from the slump test can be remixed back into the composite sample and used again because it has not been altered in any way. By remixing it, the concrete can be reused for further testing or other purposes.Rate this question:
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- 29.
How soon after retrieving your composite sample should your air and slump tests begin?
- A.
Up to 30 minutes
- B.
The concrete must "rest" for 5-minutes before beginning a test.
- C.
Air and slump tests should begin within 5-minutes after retrieving the composite sample.
Correct Answer
C. Air and slump tests should begin within 5-minutes after retrieving the composite sample.Explanation
The correct answer is that air and slump tests should begin within 5 minutes after retrieving the composite sample. This is because the concrete must "rest" for 5 minutes before beginning a test. This resting period allows any air bubbles to rise to the surface and any settling or segregation of the concrete to occur. Starting the tests within this 5-minute window ensures that the concrete is still in its fresh state and accurately represents its properties.Rate this question:
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- 30.
Out-of-the-ordinary occurrences during a concrete pour should be noted where?
- A.
Squeeze them into the margins of the specimen card
- B.
On your daily report
- C.
In an email to the project manager
Correct Answer
B. On your daily reportExplanation
During a concrete pour, it is important to document any out-of-the-ordinary occurrences for future reference and analysis. The daily report is a comprehensive record of the day's activities, including any issues or deviations from the normal process. Therefore, noting these occurrences on the daily report ensures that they are properly documented and can be easily reviewed by project stakeholders, such as the project manager, for further action or investigation.Rate this question:
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- 31.
The unit weight is calculated by multiplying the weight of the concrete in a filled and striked-off air pot, times the...
- A.
Pot/Bucket Factor, found on the calibration sheet included with each air-meter
- B.
The weight of air pot when empty
- C.
The number of miles between the lab and the job site
- D.
The number of roddings per lift
Correct Answer
A. Pot/Bucket Factor, found on the calibration sheet included with each air-meterExplanation
The correct answer is the Pot/Bucket Factor, found on the calibration sheet included with each air-meter. The unit weight of concrete is calculated by multiplying the weight of the concrete in a filled and striked-off air pot with the Pot/Bucket Factor. This factor is specific to each air-meter and is provided on the calibration sheet. It takes into account the volume and dimensions of the air pot used in the measurement. Therefore, the Pot/Bucket Factor is essential in accurately determining the unit weight of the concrete.Rate this question:
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- 32.
It is a really big deal if a thermometer, tamping rod or strike bar go missing when testing concrete.
- A.
True, these items are not replaceable.
- B.
False, while it should be avoided - losing these small tools is not a big deal. It is a big deal to not notify the lab manager immediately so that the tools can be replaced for the next person to use that concrete gear.
Correct Answer
B. False, while it should be avoided - losing these small tools is not a big deal. It is a big deal to not notify the lab manager immediately so that the tools can be replaced for the next person to use that concrete gear.Explanation
Losing the thermometer, tamping rod, or strike bar may not be a big deal in the sense that they can be replaced. However, it is still important to notify the lab manager immediately so that the tools can be replaced for the next person to use the concrete gear. This ensures that the testing process can continue smoothly and accurately.Rate this question:
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- 33.
It's ok to use cylinder molds that have been deformed or squished.
- A.
True, cylinder molds are expensive and we don't want to waste them.
- B.
False, an oblong/oval cylinder is entirely useless as it will not be able to be tested when received by the lab.
Correct Answer
B. False, an oblong/oval cylinder is entirely useless as it will not be able to be tested when received by the lab.Explanation
Using deformed or squished cylinder molds is not acceptable because it can affect the accuracy and reliability of the test results. The shape of the mold needs to be uniform and consistent in order to properly measure and test the concrete samples. If the mold is oblong or oval, it will not provide accurate results and cannot be tested effectively in the lab. Therefore, it is false that it's okay to use deformed or squished cylinder molds.Rate this question:
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- 34.
It is very important that each air-meter is calibrated once every...
- A.
Valentine's Day
- B.
6-Months
- C.
3-Months
- D.
1.5 Weeks
Correct Answer
C. 3-MonthsExplanation
Air-meters are devices used to measure the volume of air flowing through a system. Calibration is the process of adjusting and verifying the accuracy of these devices. Regular calibration is necessary to ensure that the air-meters provide accurate measurements. Calibrating them once every 3 months allows for any potential drift or inaccuracies to be detected and corrected in a timely manner. This frequency ensures that the air-meters consistently provide reliable and precise measurements, which is crucial for various applications such as HVAC systems, industrial processes, and environmental monitoring.Rate this question:
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- 35.
Which of the following is NOT required to be retrieved from each concrete batch ticket
- A.
The truck number
- B.
Any admixtures included in that batch
- C.
The drivers name
- D.
The ticket number
Correct Answer
C. The drivers nameExplanation
The driver's name is not required to be retrieved from each concrete batch ticket. The other options, such as the truck number, admixtures included in the batch, and the ticket number, are necessary information that should be included on the batch ticket. However, the driver's name may not be relevant or necessary for tracking or documenting the concrete batch.Rate this question:
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- 36.
If available, it would be wise to bring two air-meters to a larger concrete pour.
- A.
True, air-meters can malfunction without notice and it wouldn't hurt to have an extra on hand.
- B.
False, the 15 seconds it would take to load an additional air-meter into the truck is not worth the hassle.
Correct Answer
A. True, air-meters can malfunction without notice and it wouldn't hurt to have an extra on hand.Explanation
Having two air-meters for a larger concrete pour is a wise decision because air-meters can malfunction unexpectedly. By bringing an extra air-meter, the risk of a malfunctioning meter causing delays or inaccuracies in measuring air content can be mitigated. This precautionary measure ensures that the concrete pour can proceed smoothly and without any interruptions.Rate this question:
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- 37.
The air-meter is filled in 3 lifts of equal volume.
- A.
True
- B.
False, the air meter is filled all at once.
Correct Answer
A. TrueExplanation
The statement suggests that the air-meter is filled in three lifts of equal volume. This means that the air-meter is filled gradually in three equal parts rather than all at once. Therefore, the correct answer is true.Rate this question:
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- 38.
Where should you write down all of the concrete admixtures?
- A.
On both your field test report and on the specimen card for each set of cylinders
- B.
On the bottom of your daily report
- C.
On the lids for each cylinder mold
- D.
On the back of your hand
Correct Answer
A. On both your field test report and on the specimen card for each set of cylindersExplanation
You should write down all of the concrete admixtures on both your field test report and on the specimen card for each set of cylinders. This ensures that the information is accurately recorded and easily accessible for future reference. Writing it on the bottom of your daily report or on the lids for each cylinder mold may not provide a comprehensive record of the admixtures used. Writing it on the back of your hand is not a suitable location as it can easily be lost or washed off.Rate this question:
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- 39.
What must happen between rodding each lift and scooping in the next lift?
- A.
The air pot should be rotated 90°
- B.
The rod must be inspected to ensure the tip is still hemispherically rounded
- C.
The technician must try to remember whether they did 25 rods on the last lift or if they missed a few.
- D.
The sides of the air pot must be struck with a mallet 10-15 times
Correct Answer
D. The sides of the air pot must be struck with a mallet 10-15 timesExplanation
After rodding each lift, the sides of the air pot must be struck with a mallet 10-15 times. This action is necessary to ensure that the soil in the air pot settles properly and allows for accurate measurements during the scooping of the next lift. Striking the sides of the air pot with a mallet helps to compact the soil and remove any air voids, ensuring a more reliable and consistent result in the subsequent lift.Rate this question:
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- 40.
The side of the cylinder mold should be tapped with a mallet 10-15 times after rodding each lift
- A.
True, the mallet is the best option for closing the voids created by rodding
- B.
False, a mallet can dent and damage the cylinder molds. An open hand is the best option for tapping the cylinder mold 10-15 times to close any voids made from rodding.
Correct Answer
B. False, a mallet can dent and damage the cylinder molds. An open hand is the best option for tapping the cylinder mold 10-15 times to close any voids made from rodding.Explanation
The correct answer is False. Using a mallet to tap the side of the cylinder mold can dent and damage the molds. Instead, it is recommended to use an open hand to tap the mold 10-15 times in order to close any voids created by rodding.Rate this question:
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- 41.
What is a "pour release form"
- A.
A form in the kitchen at the lab designating that you have poured coffee that morning
- B.
A form that explains how to pour concrete into various testing methods such as slump and air
- C.
A form stating that a concrete pour is no longer occuring
- D.
A form submitted by the contractor detailing the schedule and placement of an upcoming concrete pour. Often utilized on our plant and tunnel jobs
Correct Answer
D. A form submitted by the contractor detailing the schedule and placement of an upcoming concrete pour. Often utilized on our plant and tunnel jobsExplanation
A "pour release form" is a form that is submitted by the contractor to provide information about the schedule and placement of an upcoming concrete pour. This form is commonly used on plant and tunnel jobs to ensure that the pouring process is properly planned and executed. It helps in coordinating the work and ensuring that all necessary preparations are made before the concrete is poured.Rate this question:
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- 42.
After striking off the final lift, the air-meter head should immediately be placed on the pot.
- A.
True, testing must begin immediately.
- B.
False, the rim of the air-meter pot needs to be cleaned and the gasket of the air-meter head needs to be dampened prior to testing.
Correct Answer
B. False, the rim of the air-meter pot needs to be cleaned and the gasket of the air-meter head needs to be dampened prior to testing.Explanation
The correct answer is false because before testing, the rim of the air-meter pot should be cleaned and the gasket of the air-meter head needs to be dampened. This ensures that the testing is accurate and reliable.Rate this question:
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- 43.
How soon after retrieving your composite samples should the cylinders begin being crafted?
- A.
Cylinders must be crafted within 15-minutes after retrieving the composite sample.
- B.
Cylinders should be made immediately after retrieving the composite sample.
- C.
The concrete has to set-up for at least 20-minutes before crafting cylinders.
Correct Answer
A. Cylinders must be crafted within 15-minutes after retrieving the composite sample.Explanation
The correct answer is that cylinders must be crafted within 15-minutes after retrieving the composite sample. This is because the composite sample represents the overall quality and characteristics of the concrete, and it is important to capture this accurately by making the cylinders as soon as possible. Waiting longer than 15 minutes may result in changes to the concrete's properties, affecting the accuracy of the cylinder test results. Therefore, it is crucial to initiate the cylinder crafting process promptly after retrieving the composite sample.Rate this question:
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- 44.
If after you have already retrieved a composite sample and begun your air and slump tests, the contractor or inspector chooses to add an ad-mixture or water to the truck, you should restart all of your testing with a new composite sample.
- A.
True, all tests are to be representative of the concrete being placed. Since the concrete in this instance has been altered, it needs to be retested with a new composite sample.
- B.
False, these slump and air tests should be considered "good enough."
Correct Answer
A. True, all tests are to be representative of the concrete being placed. Since the concrete in this instance has been altered, it needs to be retested with a new composite sample.Explanation
The correct answer is true. This is because all tests are required to be representative of the concrete being placed. In this situation, the concrete has been altered by adding an ad-mixture or water to the truck, which means that the original composite sample is no longer representative. Therefore, it is necessary to restart all testing with a new composite sample to ensure accurate results.Rate this question:
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Current Version
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Feb 13, 2023Quiz Edited by
ProProfs Editorial Team -
Feb 06, 2020Quiz Created by
Catherine Halcomb
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