ACI EXAM REVIEW QUESTIONS WITH
ACCURATE SOLUTIONS 2026
▶ Rotation of the movable portion of the testing machine's spherically
seated bearing block as it is brought to bear on the upper retaining ring is
not necessary when using pad caps, since the pad's deformation will
compensate and provide uniform loading. True or False?. Answer: False
▶ After application of the load, but before reaching _____ of the anticipated
specimen strength, check to see that the axis of the cylinder does not
depart from vertical by more than _____.. Answer: 10%, 0.5 degrees
▶ Qualification tests on an unbonded capping system must be repeated
when ever there are changes in _____.. Answer: The design or
dimensions of the retaining rings, pad composition or thickness, or the
Shore A hardness by more than 5 units
▶ This test (ASTM C39) measures the compressive strength of cylindrical
concrete specimens that have a density of less than 50 lb/ft. True or
False?. Answer: False; have a density of more than 50 lb/ft.
▶ The test method of ASTM C39 consists of applying a compressive
coaxial load to molded cylinders or cores at any rate True or False?.
Answer: False, a prescribed rate
▶ Results obtained from the compressive strength test method will depend
on many things, such as the size and ____ of the specimen, batching,
_____ procedures, the age, temperature and _____ conditions during
curing.. Answer: Shape, mixing moisture
▶ This test method (ASTM C39) is used to determine ______ _____ of
cylindrical specimens.. Answer: Compressive strength
▶ The calibration of the testing machines must be verified under four
conditions; within _____ months of the last calibration, upon original
installation or after _____, after making _____ or adjustments, and
, whenever there is a reason to suspect the ____ of the indicated loads..
Answer: 13, relocation, repairs, accuracy
▶ The machine must be power operated and apply the load intermittently.
True or False?. Answer: False, apply the load continuously
▶ Supplemental means of loading for calibration may be power or hand
operated. True or False?. Answer: True
▶ The percentage of error for loads used in the testing machine should not
exceed _____ of the indicated load.. Answer: ± 1.0%
▶ The testing machine should have two steel bearing blocks; a spherically
seated block and a solid block. True or False?. Answer: True
▶ The _____ and _____ of the spherically seat bearing block must be
designed so the steel in the contact area doesn't permanently deform when
loaded to the capacity of the testing machine.. Answer: Ball, socket
▶ The curved surface of the socket should be _____ and lubricated with
______ at least every _____ months.. Answer: Clean, petroleum-type oil,
six (or as specified by the manufacturer of the test machine)
▶ The _____ block should provide a readily machinable surface for
maintenance of the specified surface conditions.. Answer: Bottom bearing
▶ Specimens should not be tested if any individual diameter of a cylinder
differs from another diameter of the same cylinder by less than 2%. True or
False?. Answer: False, by more than 2%
▶ If cylinders have been made from a single lot of molds which consistently
produce nearly the same sized specimens, the number of individual
cylinders measured is not prohibited from being ____ to one for each ten
specimens or _____ per day whichever is greater.. Answer: Reduced,
Three
▶ When conducting compression tests of moist-cured specimens, wait at
least three days after their removal from moist storage before testing. True
or False?. Answer: False, test shall be made as soon as practicable
ACCURATE SOLUTIONS 2026
▶ Rotation of the movable portion of the testing machine's spherically
seated bearing block as it is brought to bear on the upper retaining ring is
not necessary when using pad caps, since the pad's deformation will
compensate and provide uniform loading. True or False?. Answer: False
▶ After application of the load, but before reaching _____ of the anticipated
specimen strength, check to see that the axis of the cylinder does not
depart from vertical by more than _____.. Answer: 10%, 0.5 degrees
▶ Qualification tests on an unbonded capping system must be repeated
when ever there are changes in _____.. Answer: The design or
dimensions of the retaining rings, pad composition or thickness, or the
Shore A hardness by more than 5 units
▶ This test (ASTM C39) measures the compressive strength of cylindrical
concrete specimens that have a density of less than 50 lb/ft. True or
False?. Answer: False; have a density of more than 50 lb/ft.
▶ The test method of ASTM C39 consists of applying a compressive
coaxial load to molded cylinders or cores at any rate True or False?.
Answer: False, a prescribed rate
▶ Results obtained from the compressive strength test method will depend
on many things, such as the size and ____ of the specimen, batching,
_____ procedures, the age, temperature and _____ conditions during
curing.. Answer: Shape, mixing moisture
▶ This test method (ASTM C39) is used to determine ______ _____ of
cylindrical specimens.. Answer: Compressive strength
▶ The calibration of the testing machines must be verified under four
conditions; within _____ months of the last calibration, upon original
installation or after _____, after making _____ or adjustments, and
, whenever there is a reason to suspect the ____ of the indicated loads..
Answer: 13, relocation, repairs, accuracy
▶ The machine must be power operated and apply the load intermittently.
True or False?. Answer: False, apply the load continuously
▶ Supplemental means of loading for calibration may be power or hand
operated. True or False?. Answer: True
▶ The percentage of error for loads used in the testing machine should not
exceed _____ of the indicated load.. Answer: ± 1.0%
▶ The testing machine should have two steel bearing blocks; a spherically
seated block and a solid block. True or False?. Answer: True
▶ The _____ and _____ of the spherically seat bearing block must be
designed so the steel in the contact area doesn't permanently deform when
loaded to the capacity of the testing machine.. Answer: Ball, socket
▶ The curved surface of the socket should be _____ and lubricated with
______ at least every _____ months.. Answer: Clean, petroleum-type oil,
six (or as specified by the manufacturer of the test machine)
▶ The _____ block should provide a readily machinable surface for
maintenance of the specified surface conditions.. Answer: Bottom bearing
▶ Specimens should not be tested if any individual diameter of a cylinder
differs from another diameter of the same cylinder by less than 2%. True or
False?. Answer: False, by more than 2%
▶ If cylinders have been made from a single lot of molds which consistently
produce nearly the same sized specimens, the number of individual
cylinders measured is not prohibited from being ____ to one for each ten
specimens or _____ per day whichever is greater.. Answer: Reduced,
Three
▶ When conducting compression tests of moist-cured specimens, wait at
least three days after their removal from moist storage before testing. True
or False?. Answer: False, test shall be made as soon as practicable
