ACI Concrete Field Testing Technician- Grade I well answered graded A+
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Course
Aci concrete
Institution
Aci Concrete
ACI Concrete Field Testing Technician- Grade IThe temperature of concrete may be measured in a wall form. True or False - correct answer True
The sensor of the temperature measuring device shall be submerged a minimum of _____ in. into the freshly mixed concrete. - correct answer 3 in.
Portio...
ACI Concrete Field Testing Technician- Grade I
The temperature of concrete may be measured in a wall form. True or False - correct answer True
The sensor of the temperature measuring device shall be submerged a minimum of _____ in. into the freshly mixed concrete. - correct answer 3 in.
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample. True or False? - correct answer True
The temperature measuring device shall have a capacity of measuring temperature of freshly mixed concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. - correct answer 1 degree F, 30 degrees F to 120 F
The temperature measuring device shall be calibrated _____, or whenever there is a question of _____. - correct answer Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - correct 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? - correct answer False
What must be done to the sample container prior to sampling the concrete? - correct 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. - correct 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? - correct answer At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - correct answer Reporting of temperature
The temperature of concrete is reported to the nearest _____ degrees F - correct answer 1 degree F
According to ASTM C1064, what is one reason to take the temperature of concrete? - correct 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? - correct answer False
This method covers sampling from four types of mixtures which are _____, _____, _____, and _____. - correct answer Stationary mixers, paving mixers, revolving drum mixers, and open top mixers
The maximum allowable time between obtaining the first and final portions of a composite sample is _____ minutes. - correct answer 15
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. - correct answer 5
The molding of strength test specimens shall begin within _____ minutes after fabricating the composite
sample. - correct answer 15
The concrete sample must be protected from sources of _____ and _____. - correct answer contamination and rapid evaporation
The minimum size sample for making strength test specimens is _____. - correct answer 1ft^3
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