C173 Testing air content of freshly mixed
concrete by the volumetric method Questions
with Verified Correct Answers
The maximum size aggregate allowed in this test method is ____.
1 1/2 in
The tamping rod used in this test method is a round, smooth, straight _____ diameter
rod at least 4 in greater in length than the depth of the measuring bowl being used, with
the tamping end rounded to a hemishperical tip of the same diameter, made of steel,
high-density polythylene, or other plastic of equal or greater abrasion resistance
5/8 in.
What is specified number of strokes required when rodding each layer of concrete?
25
The purpose for adding isopropyl alcohol to the volumetric meter is to ____.
help dissolve the foam that can be created during the test
The rolling process should be continued for approximately____.
1 minute
If the liquid level falls below the bottom of the site glass, _____.
add a sufficient number of calibrated cups of water to bring liquid level ino the visible range
When taking a reading of this liquid level, read to the ____.
bottom of the meniscus
, If less than 2.5 pt of alcohol are used, the air content is always indicated by the final
meter reading
False
Concrete previously used to perform another test, such as the slump test, can be used to
determine air content by the volumetric method.
False
The requirements for the strike-off bar used in this test method are that it is a flat,
straight steel ber at least 1/8 x 3/4 x 12 in) or a flat, straight high-density polyethylene
bar, or other plastic of equal or greater abrasion resistance at least 1/4 x 3/4 x 12in
TRUE
It is necessary to tap the sides of the measuring bowl after each layer has been rodded
TRUE
The Minimum total amount of time that the inversion and shaking process should be
performed for is ____, until the aggregate can be heard moving in the meter.
45 Seconds
If portions of undisturbed concrete are found in the air meter at the end of the test,____.
the test is invalid
At the end of the procedure, the air meter is ____.
disassembled and its contents examined
When large amounts of alcohol are used, the direct reading will tend to indicate a ____
air content
concrete by the volumetric method Questions
with Verified Correct Answers
The maximum size aggregate allowed in this test method is ____.
1 1/2 in
The tamping rod used in this test method is a round, smooth, straight _____ diameter
rod at least 4 in greater in length than the depth of the measuring bowl being used, with
the tamping end rounded to a hemishperical tip of the same diameter, made of steel,
high-density polythylene, or other plastic of equal or greater abrasion resistance
5/8 in.
What is specified number of strokes required when rodding each layer of concrete?
25
The purpose for adding isopropyl alcohol to the volumetric meter is to ____.
help dissolve the foam that can be created during the test
The rolling process should be continued for approximately____.
1 minute
If the liquid level falls below the bottom of the site glass, _____.
add a sufficient number of calibrated cups of water to bring liquid level ino the visible range
When taking a reading of this liquid level, read to the ____.
bottom of the meniscus
, If less than 2.5 pt of alcohol are used, the air content is always indicated by the final
meter reading
False
Concrete previously used to perform another test, such as the slump test, can be used to
determine air content by the volumetric method.
False
The requirements for the strike-off bar used in this test method are that it is a flat,
straight steel ber at least 1/8 x 3/4 x 12 in) or a flat, straight high-density polyethylene
bar, or other plastic of equal or greater abrasion resistance at least 1/4 x 3/4 x 12in
TRUE
It is necessary to tap the sides of the measuring bowl after each layer has been rodded
TRUE
The Minimum total amount of time that the inversion and shaking process should be
performed for is ____, until the aggregate can be heard moving in the meter.
45 Seconds
If portions of undisturbed concrete are found in the air meter at the end of the test,____.
the test is invalid
At the end of the procedure, the air meter is ____.
disassembled and its contents examined
When large amounts of alcohol are used, the direct reading will tend to indicate a ____
air content
