ACI Strength Exam Study Guide Latest
Updated
Name the two allowable materials with with concrete cylinders may be capped with. -
ANSWER-I. High-strength gypsum
II. Sulfur mortar
III. Neat cement paste
Name the three materials with with cylinders may be capped against. - ANSWER-I.
Glass
II. Metal
III. Granite
Prior to beginning the capping procedure, what must the metal plate be inspected for? -
ANSWER-I. Grooves
II. Gouches
III. Indentations
What is the maximum allowable size of any indentation on the base plate? - ANSWER-
0.010 in [0.25 mm]
Upon receipt of the caping material, for how long can it be kept in intervals? - ANSWER-
3 months
When must the neat cement paste be applied it to the cylinder? - ANSWER-Immediately
For how long must the concrete settle in the mold prior to applying the neat cement
paste? - ANSWER-2 to 4 hours
Prior to capping, name the three tasks that must be performed on the cylinder. -
ANSWER-I. Inspect for any bumps greater than 1/8"
II. Remove foreign debris.
III. Remove any excess water or laitence.
What is the required position of the concrete cylinder? - ANSWER-90° ± 0.5°
Name the required temperature range of the heated sulfar mortar mixture. - ANSWER-
265°F to 290 °F [130 °C to 145 °C]
When qualification tests of unbonded pads are required, they are performed b the
_____ or _____. - ANSWER-d
, True or False? This standard practice establishes a maximum number of pad reuses
that may not be exceeded under any circumstances. - ANSWER-True
True or false? Polyurethane or butyl pads with a Shore A durometer hardness of 50 that
will be used on concrete with a compressive strength of 10 to 40 MPa [1500 to 6000
psi]. It may be used "as is" from the manufacturer without further qualification testing. -
ANSWER-False
To keep track of pad usage, the user is required to maintain records that will include
_____, _____, and _____. - ANSWER-date placed in service ... pad durometer ...
number of uses
True or false? The term "unbonded cap" refers to the combination of a metal retainer
and elasomeric pad. - ANSWER-True
True or false? Practice C1231/C1231M may be used instead of the capping
requirements of Practice C617/C617M. - ANSWER-True
True or false? The pads provide a uniform distribution of load from the bearing blocks of
the testing machine by deforming in initial loading to conform to the contour of the ends
of the cylinder. - ANSWER-True
When qualifying unbonded caps, strengths below _____ of the average obtained from
the bonded caps is considered unacceptable. - ANSWER-2%
True or false? Practice C1231/C1231M contains step-by-step procedures for aligning
the specimens in the testing machine through complete failure of the cylinder. -
ANSWER-True
The pads used in this practice must be _____ thick, and the diameter shall not be more
than ____ smaller than the inside diameter of the retaining ring. - ANSWER-1/16 inch ...
2 mm
The height of the metal retaining ring must be _____. - ANSWER-in
The inside diameter of the retaining rings shall not be less than _____ or greater than
_____ of the diameter of the cylinder. - ANSWER-2 mm ...
Depressions in the ends of cylinders that exceed _____ must be corrected by sawing or
grinding prior to testing. - ANSWER-1/8 inch
Qualification tests on an unbonded capping system must be repeated whenever there
are changes in _____, _____, or _____. - ANSWER-d
Updated
Name the two allowable materials with with concrete cylinders may be capped with. -
ANSWER-I. High-strength gypsum
II. Sulfur mortar
III. Neat cement paste
Name the three materials with with cylinders may be capped against. - ANSWER-I.
Glass
II. Metal
III. Granite
Prior to beginning the capping procedure, what must the metal plate be inspected for? -
ANSWER-I. Grooves
II. Gouches
III. Indentations
What is the maximum allowable size of any indentation on the base plate? - ANSWER-
0.010 in [0.25 mm]
Upon receipt of the caping material, for how long can it be kept in intervals? - ANSWER-
3 months
When must the neat cement paste be applied it to the cylinder? - ANSWER-Immediately
For how long must the concrete settle in the mold prior to applying the neat cement
paste? - ANSWER-2 to 4 hours
Prior to capping, name the three tasks that must be performed on the cylinder. -
ANSWER-I. Inspect for any bumps greater than 1/8"
II. Remove foreign debris.
III. Remove any excess water or laitence.
What is the required position of the concrete cylinder? - ANSWER-90° ± 0.5°
Name the required temperature range of the heated sulfar mortar mixture. - ANSWER-
265°F to 290 °F [130 °C to 145 °C]
When qualification tests of unbonded pads are required, they are performed b the
_____ or _____. - ANSWER-d
, True or False? This standard practice establishes a maximum number of pad reuses
that may not be exceeded under any circumstances. - ANSWER-True
True or false? Polyurethane or butyl pads with a Shore A durometer hardness of 50 that
will be used on concrete with a compressive strength of 10 to 40 MPa [1500 to 6000
psi]. It may be used "as is" from the manufacturer without further qualification testing. -
ANSWER-False
To keep track of pad usage, the user is required to maintain records that will include
_____, _____, and _____. - ANSWER-date placed in service ... pad durometer ...
number of uses
True or false? The term "unbonded cap" refers to the combination of a metal retainer
and elasomeric pad. - ANSWER-True
True or false? Practice C1231/C1231M may be used instead of the capping
requirements of Practice C617/C617M. - ANSWER-True
True or false? The pads provide a uniform distribution of load from the bearing blocks of
the testing machine by deforming in initial loading to conform to the contour of the ends
of the cylinder. - ANSWER-True
When qualifying unbonded caps, strengths below _____ of the average obtained from
the bonded caps is considered unacceptable. - ANSWER-2%
True or false? Practice C1231/C1231M contains step-by-step procedures for aligning
the specimens in the testing machine through complete failure of the cylinder. -
ANSWER-True
The pads used in this practice must be _____ thick, and the diameter shall not be more
than ____ smaller than the inside diameter of the retaining ring. - ANSWER-1/16 inch ...
2 mm
The height of the metal retaining ring must be _____. - ANSWER-in
The inside diameter of the retaining rings shall not be less than _____ or greater than
_____ of the diameter of the cylinder. - ANSWER-2 mm ...
Depressions in the ends of cylinders that exceed _____ must be corrected by sawing or
grinding prior to testing. - ANSWER-1/8 inch
Qualification tests on an unbonded capping system must be repeated whenever there
are changes in _____, _____, or _____. - ANSWER-d
