ACI Concrete Exam With Verified Solutions
Graded A+
The end of the temperature sensor portion of the temperature measuring device is submerged a
minimum of _________ inches into the freshly mixed concrete.
3 Inches
The temperature measuring device shall be capable of accurately measuring the temperature of
freshly mixed concrete to +_______ º F throughout a range of __________.
+ 1 º F, 30o to 120o F
The temperature measuring device shall be verified ____________, or whenever there is a question
of __________.
Annually, Accuracy
The temperature of concrete may be measured in a wheelbarrow. TRUE or FALSE?
TRUE
The temperature of concrete may be measured in a wall form. TRUE or FALSE?
TRUE
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temperature. TRUE or FALSE?
FALSE
What must be done to the sample container prior to sampling the concrete?
Dampen
What must be done to the concrete surrounding the temperature measuring device after the device is
submerged in the fresh concrete?
Gently press the concrete around the temperature device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete?
At least 2 minutes, no more than 5.
After the temperature of the concrete is read, what is then required?
Reporting of temperature
The temperature of the concrete is reported to the nearest ______ ºF.
1ºF
According to ASTM 1064, what is one reason to take the temperature of concrete?
Verify conformance to a specified requirement for temperature of concrete.
A maximum temperature of freshly mixed concrete is specified in ASTM 1064. True or False?
, FALSE
The sample of concrete used for temperature determination must be rodded 25 times. TRUE or
FALSE?
FALSE
The slump test is applicable to plastic concrete with a maximum size aggregate of _________.
1-1/2 in. in size
When the concrete contains aggregate larger than allowed for the slump test, the large aggregate
must be____________.
Removed by wet sieving the sample over 1-1/2 in. sieve
The mold for making the slump test is in the shape of ___________.
the frustum of a cone
The height of the slump mold is _______.
12 in
The interior surface of the slump mold is allowed to have minor irregularities.
True or False?
FALSE
For use in the slump test, the end or both ends of the tamping rod must be__________.
Rounded to a hemispherical tip
The sample of concrete for use in making the slump test must be obtained in accordance with ASTM
Standard _________.
C 172
The slump mold should be in a dry condition before beginning the test. TRUE or FALSE?
FALSE
The surface on which the slump mold will be placed must be__________________.
Rigid, flat, level, moist, nonabsorbent, and free of vibration.
The slump mold is filled in _________ layers.
Three
Each layer should fill approximately ________ the volume of the mold.
One-Third
The approximate concrete depth (in vertical distance) after placing the first layer is ________, and the
second layer is __________.
Graded A+
The end of the temperature sensor portion of the temperature measuring device is submerged a
minimum of _________ inches into the freshly mixed concrete.
3 Inches
The temperature measuring device shall be capable of accurately measuring the temperature of
freshly mixed concrete to +_______ º F throughout a range of __________.
+ 1 º F, 30o to 120o F
The temperature measuring device shall be verified ____________, or whenever there is a question
of __________.
Annually, Accuracy
The temperature of concrete may be measured in a wheelbarrow. TRUE or FALSE?
TRUE
The temperature of concrete may be measured in a wall form. TRUE or FALSE?
TRUE
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temperature. TRUE or FALSE?
FALSE
What must be done to the sample container prior to sampling the concrete?
Dampen
What must be done to the concrete surrounding the temperature measuring device after the device is
submerged in the fresh concrete?
Gently press the concrete around the temperature device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete?
At least 2 minutes, no more than 5.
After the temperature of the concrete is read, what is then required?
Reporting of temperature
The temperature of the concrete is reported to the nearest ______ ºF.
1ºF
According to ASTM 1064, what is one reason to take the temperature of concrete?
Verify conformance to a specified requirement for temperature of concrete.
A maximum temperature of freshly mixed concrete is specified in ASTM 1064. True or False?
, FALSE
The sample of concrete used for temperature determination must be rodded 25 times. TRUE or
FALSE?
FALSE
The slump test is applicable to plastic concrete with a maximum size aggregate of _________.
1-1/2 in. in size
When the concrete contains aggregate larger than allowed for the slump test, the large aggregate
must be____________.
Removed by wet sieving the sample over 1-1/2 in. sieve
The mold for making the slump test is in the shape of ___________.
the frustum of a cone
The height of the slump mold is _______.
12 in
The interior surface of the slump mold is allowed to have minor irregularities.
True or False?
FALSE
For use in the slump test, the end or both ends of the tamping rod must be__________.
Rounded to a hemispherical tip
The sample of concrete for use in making the slump test must be obtained in accordance with ASTM
Standard _________.
C 172
The slump mold should be in a dry condition before beginning the test. TRUE or FALSE?
FALSE
The surface on which the slump mold will be placed must be__________________.
Rigid, flat, level, moist, nonabsorbent, and free of vibration.
The slump mold is filled in _________ layers.
Three
Each layer should fill approximately ________ the volume of the mold.
One-Third
The approximate concrete depth (in vertical distance) after placing the first layer is ________, and the
second layer is __________.
