Aci Aggregate Testing Technician - Level 1 - Section 8

ACI AGGREGATE TESTING TECHNICIAN - LEVEL 1 -
SECTION 8
AASHTO T 21 / ASTM C40
This test method involves the use of hazardous materials. - Answers :True

AASHTO T 21 / ASTM C40
The user of these standards is responsible for any safety problems associated with
them. - Answers :True

AASHTO T 21 / ASTM C40
The principal value of this test is to furnish a warning that injurious amounts of ____
may be present. - Answers :Organic impurities

AASHTO T 21 / ASTM C40
A dark color in the test sample is a warning sign. - Answers :True

AASHTO T 21 / ASTM C40
When a sample subjected to this test produces a color lighter than the standard color
solution, it is
advisable to perform the test for the effect of organic impurities on the strength of the
mortar. - Answers :False; when it produces a darker color

AASHTO T 21 / ASTM C40
When organic impurities are evident in the fine aggregate tested, it is advisable to
perform Test Method _____ . - Answers :T 71

AASHTO T 21 / ASTM C40
For this test, bottles of at least 3 inch outside thickness should be used. - Answers
:False; thickness no more than 2.5 in.

AASHTO T 21 / ASTM C40
Unmarked bottles may be calibrated and scribed with graduations by the user. -
Answers :True

AASHTO T 21 / ASTM C40
In such case, graduation marks are required at only ____ points. - Answers :Three

AASHTO T 21 / ASTM C40
The bottles used should be a light green in color. - Answers :False; Colorless glass

AASHTO T 21 / ASTM C40
The graduations on the bottles should always be in ounces. - Answers :False; milliliters
or ounces