1-131 of 131
If the concrete contains aggregate larger than the maximum allowed for this test, the
sample must be _____.
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Wet sieved over a 1½ in. (37.5 mm) sieve
,If less than 1.25 L [2.5 pt] of alcohol are used, the air content is always indicated by the
final meter reading. True or False?
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False, if the air content is more than 9%, the number of calibrated cups of
water introduced into the meter to bring the liquid level within the
graduated range must be added
When strength specimens are to be made, what three other tests must be made?
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Slump, air content, temperature
When consolidating the concrete by vibration, how many times should the vibrator be
inserted into each layer?
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Three (3)
ASTM C138
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, Standard Test Method for Density (Unit Weight),
Yield, and Air Content (Gravimetric) of Concrete
The pressure method of determining air content can be used on concrete containing
_____ _____ aggregate.
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Relatively Dense
ASTM C1064
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Standard Test Method For Temperature of Freshly Mixed Hydraulic-
Cement Concrete
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?
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Remove a representative portion of the excess concrete with a trowel or
scoop
, How long must the temperature measuring device remain in the freshly mixed
concrete?
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minimum of two minutes, maximum of five minutes
Cylinders made for the purpose of determining when a structure may be put into
service shall be removed from the molds _________________________________________________________.
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At the time of the removal of formwork
A 6 by 12 in. [150 mm by 300 mm] cylinder mold can be used for concrete containing
aggregate with particles not exceeding _____ in size, without the need for wet sieving
the concrete.
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2 in. [50 mm]
The mold for making the slump test is in the shape of _____.
Give this one a try later!
If the concrete contains aggregate larger than the maximum allowed for this test, the
sample must be _____.
Give this one a try later!
Wet sieved over a 1½ in. (37.5 mm) sieve
,If less than 1.25 L [2.5 pt] of alcohol are used, the air content is always indicated by the
final meter reading. True or False?
Give this one a try later!
False, if the air content is more than 9%, the number of calibrated cups of
water introduced into the meter to bring the liquid level within the
graduated range must be added
When strength specimens are to be made, what three other tests must be made?
Give this one a try later!
Slump, air content, temperature
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)
ASTM C138
Give this one a try later!
, Standard Test Method for Density (Unit Weight),
Yield, and Air Content (Gravimetric) of Concrete
The pressure method of determining air content can be used on concrete containing
_____ _____ aggregate.
Give this one a try later!
Relatively Dense
ASTM C1064
Give this one a try later!
Standard Test Method For Temperature of Freshly Mixed Hydraulic-
Cement Concrete
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?
Give this one a try later!
Remove a representative portion of the excess concrete with a trowel or
scoop
, How long must the temperature measuring device remain in the freshly mixed
concrete?
Give this one a try later!
minimum of two minutes, maximum of five minutes
Cylinders made for the purpose of determining when a structure may be put into
service shall be removed from the molds _________________________________________________________.
Give this one a try later!
At the time of the removal of formwork
A 6 by 12 in. [150 mm by 300 mm] cylinder mold can be used for concrete containing
aggregate with particles not exceeding _____ in size, without the need for wet sieving
the concrete.
Give this one a try later!
2 in. [50 mm]
The mold for making the slump test is in the shape of _____.
Give this one a try later!
