ACI Aggregate Testing Technician - Level 1 -
Section 8 Questions And Answers
AASHTO T 21 / ASTM C40
This test method involves the use of hazardous materials.
- (correct answer) -True
AASHTO T 21 / ASTM C40
The user of these standards is responsible for any safety
problems associated with them. - (correct answer) -True
AASHTO T 21 / ASTM C40
The principal value of this test is to furnish a warning that
injurious amounts of ____ may be present. - (correct
answer) -Organic impurities
AASHTO T 21 / ASTM C40
A dark color in the test sample is a warning sign. - (correct
answer) -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. - (correct
answer) -False; when it produces a darker color
AASHTO T 21 / ASTM C40
Section 8 Questions And Answers
AASHTO T 21 / ASTM C40
This test method involves the use of hazardous materials.
- (correct answer) -True
AASHTO T 21 / ASTM C40
The user of these standards is responsible for any safety
problems associated with them. - (correct answer) -True
AASHTO T 21 / ASTM C40
The principal value of this test is to furnish a warning that
injurious amounts of ____ may be present. - (correct
answer) -Organic impurities
AASHTO T 21 / ASTM C40
A dark color in the test sample is a warning sign. - (correct
answer) -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. - (correct
answer) -False; when it produces a darker color
AASHTO T 21 / ASTM C40
