ASTM C138/C138M Unit Weight Study Questions TESTS WITH ANSWERS A+ GRADE.
16 millimeters or 5/8 inch plus or minus 2 millimeters or 1/16 inch - The diameter of the tamping rod
used in this test method is BLANK.
Rounded to a hemispherical tip - What is the required shape of the tamping end of the rod?
9000 vibrations per minute or 150 hz - What is the required minimum frequency of the vibrator used in
this test method?
19 millimeters or .75 inches, 38 millimeters or 1.5 inches - The outside diameter or side dimension of the
vibrating element must be at least BLANK but not greater than BLANK.
False, measure must be steel or other suitable metal. - A plastic container can be used for the measure in
this test method.
6 millimeters or 1/4 inch - What is the minimum thickness of a metal strike-off plate?
12 millimeters or 1/2 inch - What is the minimum thickness for a glass or acrylic strike-off plate?
600 plus or minus 200 grams or 1.25 plus or minus .5 pounds. - What is the specified weight of the mallet
used on measures that are 14 liters or .5 cubic feet or smaller?
Test Method C29/C29M - Measures other than air meter bowls used for this test must conform to
BLANK.
Test Method C231/C231M, Test Method C29/C29M - Air meter bowls used for this test must conform to
BLANK and be calibrated for volume according to BLANK.
Practice C172/C172M - The concrete sample must be obtained in accordance with what ASTM Practice?
16 millimeters or 5/8 inch plus or minus 2 millimeters or 1/16 inch - The diameter of the tamping rod
used in this test method is BLANK.
Rounded to a hemispherical tip - What is the required shape of the tamping end of the rod?
9000 vibrations per minute or 150 hz - What is the required minimum frequency of the vibrator used in
this test method?
19 millimeters or .75 inches, 38 millimeters or 1.5 inches - The outside diameter or side dimension of the
vibrating element must be at least BLANK but not greater than BLANK.
False, measure must be steel or other suitable metal. - A plastic container can be used for the measure in
this test method.
6 millimeters or 1/4 inch - What is the minimum thickness of a metal strike-off plate?
12 millimeters or 1/2 inch - What is the minimum thickness for a glass or acrylic strike-off plate?
600 plus or minus 200 grams or 1.25 plus or minus .5 pounds. - What is the specified weight of the mallet
used on measures that are 14 liters or .5 cubic feet or smaller?
Test Method C29/C29M - Measures other than air meter bowls used for this test must conform to
BLANK.
Test Method C231/C231M, Test Method C29/C29M - Air meter bowls used for this test must conform to
BLANK and be calibrated for volume according to BLANK.
Practice C172/C172M - The concrete sample must be obtained in accordance with what ASTM Practice?
