WGU C173 AIR CONTENT – VOLUMETRIC
METHOD TEST QUESTIONS AND ANSWERS
ASTM standard for Air Content - Volumetric method? - ANSWER C173
The volumetric method of determining air content of concrete can be used on
concrete containing what types of aggregate? - ANSWER All types of
aggregate
What are the requirements for the tamping rod used in the test method? -
ANSWER - Round, straight 5/8" +/- 1/16" diameter
- Shall be at least 4" greater in length than depth of bowl
- Hemispherical tip
- steel, high-density polyethylene, or other plastic of equal or greater abrasion
resistance
What are the requirements for strike-off bar to be used in this test method? -
ANSWER - Flat straight steel bar, at least 1/8" by 3/4" by 12"
Or flat, straight high-density polyethylene bar, plastic, etc. at least 1/4" x 3/4"
by 12"
What is the approximate volume of the measuring cup to be used in adding
water to the air meter in relation to the volume of the air meter bowl? -
ANSWER 1% +/- 0.04%
, What kind of alcohol and at what concentration is to be used in this test
method? - ANSWER Isopropyl, 70% by volume (65% by weight)
6
A mallet weighing ___ shall be used to tap the sides of the bowl after rodding
each layer. - ANSWER 1.25 +/- 0.5 lb
The sample of concrete to be used in this test method shall be obtained in
accordance with which ASTM Standard? - ANSWER C172
The max size aggregate allowed in this test method is ___. - ANSWER 1.5
inches
If the concrete sample contains aggregate larger than that permitted for this test,
the sample must be ____.
- A N S W E R Wet sieved over a 1 inch sieve
When filling the bowl of the air meter, the concrete must be placed in ___ layers
of equal depth. - A N S W E R 2
What number of strokes is specified for rodding each layer of concrete? -
ANSWER 25
When each layer is rodded, the sides of the bowl must be tapped. T/F -
ANSWER True
METHOD TEST QUESTIONS AND ANSWERS
ASTM standard for Air Content - Volumetric method? - ANSWER C173
The volumetric method of determining air content of concrete can be used on
concrete containing what types of aggregate? - ANSWER All types of
aggregate
What are the requirements for the tamping rod used in the test method? -
ANSWER - Round, straight 5/8" +/- 1/16" diameter
- Shall be at least 4" greater in length than depth of bowl
- Hemispherical tip
- steel, high-density polyethylene, or other plastic of equal or greater abrasion
resistance
What are the requirements for strike-off bar to be used in this test method? -
ANSWER - Flat straight steel bar, at least 1/8" by 3/4" by 12"
Or flat, straight high-density polyethylene bar, plastic, etc. at least 1/4" x 3/4"
by 12"
What is the approximate volume of the measuring cup to be used in adding
water to the air meter in relation to the volume of the air meter bowl? -
ANSWER 1% +/- 0.04%
, What kind of alcohol and at what concentration is to be used in this test
method? - ANSWER Isopropyl, 70% by volume (65% by weight)
6
A mallet weighing ___ shall be used to tap the sides of the bowl after rodding
each layer. - ANSWER 1.25 +/- 0.5 lb
The sample of concrete to be used in this test method shall be obtained in
accordance with which ASTM Standard? - ANSWER C172
The max size aggregate allowed in this test method is ___. - ANSWER 1.5
inches
If the concrete sample contains aggregate larger than that permitted for this test,
the sample must be ____.
- A N S W E R Wet sieved over a 1 inch sieve
When filling the bowl of the air meter, the concrete must be placed in ___ layers
of equal depth. - A N S W E R 2
What number of strokes is specified for rodding each layer of concrete? -
ANSWER 25
When each layer is rodded, the sides of the bowl must be tapped. T/F -
ANSWER True
