Aci (Concrete Field Tech Grade 1 Certification)

Front 1

ASTM 1064: Concrete cover should be at least _____.

Back 1

3 inches (175 cm)

Front 2

ASTM 1064: Containers shall be large enough to provide ____ of cover in all directions around the sensor.

Back 2

3 inches (175 cm)

Front 3

ASTM 1064: Temperature measuring devices shall be capable of measuring temperature to +/- ___° through a range of ___° to ___°.

Back 3

1°F (0.5°C), 30 to 120 (0° to 50°C)

Front 4

ASTM 1064: All TMDs shall be readable and accurate to +/- ___ at the verification points.

Back 4

0.5°F (0.2°C)

Front 5

ASTM 1064: TMDs should be calibrated ____ or ____.

Back 5

Annually or whenever there is a question of accuracy

Front 6

ASTM 1064: Leave the TMD in the concrete for at least ____ but not more than ____.

Back 6

2 minutes, 5 minutes

Front 7

ASTM 1064: Read and record the temperature to the nearest ____°F.

Back 7

1°F (0.5°C)

Front 8

True or False: ASTM 1064: The temperature of the concrete may be measured in a wheelbarrow.

Back 8

True

Front 9

True or False: ASTM 1064: The temperature of the concrete may be measured in wall form.

Back 9

True

Front 10

True or False: ASTM 1064: A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature.

Back 10

False

Front 11

ASTM 1064: What must be done to the sample container prior to sampling the concrete?

Back 11

Dampen the container

Front 12

ASTM 1064: What must be done to the concrete surrounding the temperature measuring device after the device is submerged in fresh concrete?

Back 12

Gently press the concrete around the device to ensure concrete is touching all sides of the TMD.

Front 13

ASTM 1064: After the temperature of the concrete is read, what is then required?

Back 13

Record the reading

Front 14

ASTM 1064: What is one reason to take the temperature of the concrete?

Back 14

To verify conformance to requirements

Front 15

True or False: ASTM 1064: A maximum temperature of freshly mixed concrete is specified in ASTM C1064.

Back 15

False

Front 16

ASTM 1064: What special procedures are required when taking the temperature of concrete containing large size coarse aggregate (over 3 in. [75 mm.])?

Back 16

Wait up to 20 minutes

Front 17

True or False: ASTM 1064: The sample of concrete used for temperature determination must be rodded 25 times.

Back 17

False

Front 18

ASTM 138: The diameter of the tamping rod used in this test method is ___.

Back 18

5/8" (16mm)

Front 19

ASTM 138: What is the required shape of the tamping end of the rod?

Back 19

Hemispherical

Front 20

ASTM 138: What is the minimum frequency of the vibrator used in this test method?

Back 20

7000 vibrations/minute

Front 21

ASTM 138: The outside diameter or side dimension of the vibrating element must be at least ___ but not greater than ___.

Back 21

0.75 in (19mm), 1.5 in (38mm)

Front 22

True or False: ASTM 138: A plastic container can be used for the measure in this method.

Back 22

False

Front 23

ASTM 138: What is the minimum thickness of a metal strike-off plate?

Back 23

1/4 in (6mm)

Front 24

ASTM 138: What is the minimum thickness for a glass or acrylic strike-off plate?

Back 24

1/2 in (12mm)

Front 25

ASTM 138: What is the specified weight of the mallet used in measures that are 0.5 ft^3 [14L] or smaller?

Back 25

1.25 +/- 0.5 Lb (600 +/- 200 g)

Front 26

ASTM 138: Measures other than air meter bowls used for this test must conform to ASTM ____.

Back 26

C 29

Front 27

ASTM 138: Air meter bowls used for this test must Conform to ASTM ___ and be calibrated for volume according to ASTM ___.

Back 27

C 231, C 29/C29M

Front 28

ASTM 138: The concrete sample must be obtained in accordance with what ASTM method?

Back 28

C 172

Front 29

ASTM 138: What method of consolidation must be used when the slump is greaterthan 3 in. [75 mm]?

Back 29

Rodding

Front 30

ASTM 138: What method of consolidation must be used when the slump is less than 1 in. [25 mm]?

Back 30

Vibration

Front 31

ASTM 138: If rodding is the method of consolidation being used, the measure must be filled in how many layers?

Back 31

3

Front 32

ASTM 138: For a measure of 0.5 ft^3 [14 L], what is the required number of strokes of the tamping rod for consolidation of each layer?

Back 32

25

Front 33

ASTM 138: When rodding in the middle and the top layers, the tamping rod should penetrate into the layer below approximately ___.

Back 33

1 in. (25 mm)

Front 34

ASTM 138: If vibration is the method of consolidation, the measure must be filled in ___ approximatly equal layers.

Back 34

2

Front 35

ASTM 138: 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?

Back 35

Remove excess with a trowel or scoop

Front 36

ASTM 138: After consolidation of the final layer, an excess of concrete ___ above the top of the measure is considered optmimum.

Back 36

1/8 in

Front 37

ASTM 138: After completing the strike-off procedure, what must be done before weighing the measure and sample?

Back 37

Clean around the edge

Front 38

ASTM 231: The pressure method of determining air content can be used on concrete containing ___ ___ aggregate.

Back 38

Relatively dense

Front 39

ASTM 231: The pressure method of determining air content cannot be used on concrete containing the following types of aggregate: ___, ___, ___.

Back 39

light weight, air cooled blast furnace slags, and aggregates of high porosity

Front 40

ASTM 231: What is the minimum allowable capacity of the measuring bowl used in this test method?

Back 40

0.2 ft^3

Front 41

ASTM 231: What are the required characteristics of the tamping rod used in this test?

Back 41

Height of measure + 4in to 24 inches long, 5/8th in diameter, hemispherical tip

Front 42

ASTM 231: What is the specified size of the mallet required for this test method when the measuring bowl has a capacity of 0.5ft^3 (14 L) or less?

Back 42

1.25 +/- 0.5 lb

Front 43

ASTM 231: The sample of concrete used for this test is to be obtained in accordance with what ASTM standard?

Back 43

C 172

Front 44

ASTM 231: The maximum size aggregate allowed for this tut method is ___.

Back 44

2in.

Front 45

ASTM 231: If the concrete contains aggregate larger than the maximum allowed for this test, the sample must be ___.

Back 45

wet sieved

Front 46

ASTM 231: If the concrete sample is to be consolidated by rodding, the measure is filled in ___ layers.

Back 46

3

Front 47

ASTM 231: If the concrete sample is to be consolidated by vibration, the measure is filled in ___ layers.

Back 47

2

Front 48

ASTM 231: When rodding the concrete sample, what is the specified number if strokes required for each layer?

Back 48

25