1-112 of 112
The composite samples from a truck mixer must be obtained from the _____ portion of
the batch.
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Middle
,The initial quantity of water and alcohol added to the air meter can be poured directly
into the neck of the top section of the air meter. True or False?
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False; the funnel must be used
How long must the temperature measuring device remain in the freshly mixed
concrete?
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At least 2 minutes but not more than 5 minutes
When consolidating the concrete by vibration, how many times should the vibrator be
inserted into each layer?
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Three (3)
At the end of the procedure, the air meter is _____.
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, Disassembled and its contents examined
What is the specified weight of the mallet used on measures that are 0.5 ft^3 [14 L] or
smaller?
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1.25 +- 0.50 lb. [600 +- 200 g]
The minimum frequency of an internal vibrator used in this procedure is _____.
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9000 vibrations per minute [150 Hz]
When rodding the middle and the top layers, the tamping rod should penetrate into
the layer below approximately _____.
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1 in. [25 mm]
When rodding a standard 6 by 12 in [150 mm by 300 mm] cylinder, each layer must be
rodded _____ times.
, Give this one a try later!
25
The surface on which the slump mold will be placed must be _____.
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Flat, level, moist, nonabsorbent, and free of vibration
The pressure method of determining air content can be used on concrete containing
_____ _____ aggregate.
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Relatively Dense
A plastic container can be used for the measure in this method. True or False?
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False, measure must be steel or another suitable metal
What tools may be used to strike off the top surface of the concrete following
consolidation of the final layer?
The composite samples from a truck mixer must be obtained from the _____ portion of
the batch.
Give this one a try later!
Middle
,The initial quantity of water and alcohol added to the air meter can be poured directly
into the neck of the top section of the air meter. True or False?
Give this one a try later!
False; the funnel must be used
How long must the temperature measuring device remain in the freshly mixed
concrete?
Give this one a try later!
At least 2 minutes but not more than 5 minutes
When consolidating the concrete by vibration, how many times should the vibrator be
inserted into each layer?
Give this one a try later!
Three (3)
At the end of the procedure, the air meter is _____.
Give this one a try later!
, Disassembled and its contents examined
What is the specified weight of the mallet used on measures that are 0.5 ft^3 [14 L] or
smaller?
Give this one a try later!
1.25 +- 0.50 lb. [600 +- 200 g]
The minimum frequency of an internal vibrator used in this procedure is _____.
Give this one a try later!
9000 vibrations per minute [150 Hz]
When rodding the middle and the top layers, the tamping rod should penetrate into
the layer below approximately _____.
Give this one a try later!
1 in. [25 mm]
When rodding a standard 6 by 12 in [150 mm by 300 mm] cylinder, each layer must be
rodded _____ times.
, Give this one a try later!
25
The surface on which the slump mold will be placed must be _____.
Give this one a try later!
Flat, level, moist, nonabsorbent, and free of vibration
The pressure method of determining air content can be used on concrete containing
_____ _____ aggregate.
Give this one a try later!
Relatively Dense
A plastic container can be used for the measure in this method. True or False?
Give this one a try later!
False, measure must be steel or another suitable metal
What tools may be used to strike off the top surface of the concrete following
consolidation of the final layer?
