ACI CONCRETE FIELD TESTING TECHNICIAN
GRADE 1 ACTUAL EXAM WITH QUESTIONS
AND WELL-VERIFIED CORRECT ANSWERS |
ALREADY GRADED A+ | ACI CONCRETE FIELD
TESTING TECHNICIAN LATEST VERSION 2025
|BRAND NEW 2025 EXAM
The sensor of the temperature measuring device shall be submerged a minimum of _____ in. [_____mm] into the freshly mixed concrete. - ANSWER- 3 in. [75 mm]
The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. - ANSWER- 1 degree F [0.5 C], 30 degrees F to 120 F [0 C to 50 C]
The temperature measuring device shall be calibrated _____, or whenever there is a question of _____. - ANSWER- Annually, accuracy
The maximum allowable time between obtaining a composite sample's first and final portions is _____ minutes. - ANSWER- 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. True or False? - ANSWER- True
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The maximum elapsed time allowed between obtaining the final portion of the composite sample and beginning the tests for slump, temperature, and air content is _____ minutes. - ANSWER- 5
The molding of strength test specimens shall begin within _____ minutes after fabricating the composite sample. - ANSWER- 15
The concrete sample must be protected from contamination and _____. - ANSWER- Rapid evaporation
The minimum size sample for making strength test specimens is _____. - ANSWER- 28 L (1ft^3)
When sampling from a stationary mixer, the batch must be sampled at _____ or more regularly spaced intervals during discharge of the middle portion of the batch
- ANSWER- 2
The composite sample for a paving mixer must represent a minimum of _____ different portions of the batch of concrete taken from the pile after discharge. -
ANSWER- 5
When sampling from a revolving drum truck mixer, concrete must be sampled at a minimum of _____ regularly spaced intervals during discharge of the middle portion of this batch. - ANSWER- 2
Concrete samples from a truck mixer must be obtained before any water or admixtures are added to the mixer at the job site. True or False? - ANSWER- False
The composite samples from a truck mixer must be obtained from the _____ portion of the batch. - ANSWER- Middle 2 / 4
When the concrete contains aggregate larger than that permitted for a particular test method, the sample of concrete must be _____ _____ before making the test. - ANSWER- Wet sieved
The temperature of concrete may be measured in a wheelbarrow. True or False? - ANSWER- True
The temperature of concrete may be measured in a wall form. True or False - ANSWER- True
A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. True or False? - ANSWER- False
What must be done to the sample container before sampling the concrete? - ANSWER- Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device after the device is submerged in the fresh concrete. - ANSWER- Gently press the concrete around the temperature measuring device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete? - ANSWER- At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ANSWER- Reporting of temperature
The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ANSWER- 1 degree F [0.5 C] 3 / 4
According to ASTM C1064, what is one reason to take the temperature of concrete? - ANSWER- Verify conformance to a specified requirement for temperature of concrete
A maximum temperature of freshly mixed concrete is specified in ASTM C1064.True or False? - ANSWER- False
The sample of concrete used for temperature determination must be rodded 25 times. True or False? - ANSWER- False If, after consolidation of the final layer, the concrete level is 1/2 in. (13 mm) above the top of the measure, what should be done? - ANSWER- Remove a representative portion of the excess concrete with a trowel or scoop
After consolidation of the final layer, an excess of concrete ____ above the top of the measure is considered optimum. - ANSWER- 1/8 in. [3 mm]
After completing the strike-off procedure, what must be done before weighing the measure and sample? - ANSWER- Clean off any excess concrete
The pressure method of determining air content can be used on concrete containing _____ _____ aggregate. - ANSWER- Relatively Dense
The pressure method of determining air content cannot be used on concrete containing the following types of aggregates, _____, _____, _____. - ANSWER- Lightweight, air-cooled blast furnace slag, or aggregates of high porosity
What is the minimum allowable capacity of the measuring bowl used in this test method? - ANSWER- 6 L (0.20 ft^3)
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