ACI Certification - Concrete Field Testing Technician -
Grade 1 - Test Sample Written Exam Questions - CP-1(17)
Questions With Complete Solutions
According to ASTM C138, what is the air content (in percent) of
the following concrete batch? The theoretical density computed
on an air-free basis is 168 lb/ft^3 The density is 158 lb/ft^3
Correct Answers 6.0%= [(168 - 158)/168] x 100
After strike off of the measure used to determine density, a small
quantity of concrete may be added to correct a deficiency. True
or False? Correct Answers False
ASTM C173 specifies a minimum time requirement for
inverting and agitating the meter to free concrete from the base.
True or False? Correct Answers True
For normal strength concretes, what temperature range must be
maintained for test cylinders during initial curing? Correct
Answers 60-80 deg F
If the aggregate correction factor for a given source of fine and
coarse aggregate is found to be .2% in a pressure air meter, and
an air content value of 5.0% is read on the gage of the same air
meter containing concrete with the same aggregate, what is the
correct air content in %. Correct Answers 4.8% = 5.0 - 0.2
It is acceptable to fabricate a test specimen from the same
concrete used for the air content test. True or False? Correct
Answers False
Grade 1 - Test Sample Written Exam Questions - CP-1(17)
Questions With Complete Solutions
According to ASTM C138, what is the air content (in percent) of
the following concrete batch? The theoretical density computed
on an air-free basis is 168 lb/ft^3 The density is 158 lb/ft^3
Correct Answers 6.0%= [(168 - 158)/168] x 100
After strike off of the measure used to determine density, a small
quantity of concrete may be added to correct a deficiency. True
or False? Correct Answers False
ASTM C173 specifies a minimum time requirement for
inverting and agitating the meter to free concrete from the base.
True or False? Correct Answers True
For normal strength concretes, what temperature range must be
maintained for test cylinders during initial curing? Correct
Answers 60-80 deg F
If the aggregate correction factor for a given source of fine and
coarse aggregate is found to be .2% in a pressure air meter, and
an air content value of 5.0% is read on the gage of the same air
meter containing concrete with the same aggregate, what is the
correct air content in %. Correct Answers 4.8% = 5.0 - 0.2
It is acceptable to fabricate a test specimen from the same
concrete used for the air content test. True or False? Correct
Answers False
