Chapter 7 - ASTM C31/C31M - Making
and curing concrete test specimens in
the field Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
Practice C31/C31m gives Making, curing, protecting, and
standardized requirements for transporting
___, ___, ___, and ___, of test
specimens.
For cylinders with a diameter 16 +- 2mm (5/8 inch +- 1/16 inch)
of 150 mm (6 in.) or greater,
the tamping rod must be a
round, straight steel rod with a
diameter of ________.
The minimum frequency of an 150 Hz (9000 vibrations per minute)
internal vibrator used in this
procedure is _____.
The container for obtaining the Metal pan; Wheel Barrow; Flat,
concrete sample used in this Clean, nonabsorbent mixing board.
procedure can be a _____,
_____, or _____.
A 150 by 300 mm (6 by 12 in.) 2 Inch (50 MM)
cylinder mold can be used for
concrete containing aggregate
with particles not exceeding
, _______ in size, without the
need for wet sieving the
concrete.
The sample of concreted used C172/C127M
in molding test specimens
must be obtained in
accordance with what ASTM
Standard/Practice?
When strength specimens are Slump, air content, temperature.
to be made, what three other
test must be made?
After molding test specimens, False, the specimens must be
you should wait two hours moved immediately.
before moving them to the
location of initial storage. True
or False?
The supporting surface on 20 MM/M (1/4 in./ft)
which specimens are stored
shall be level within _____.
For concrete with a slump of Vibration
less than 25 mm (1 in.), the
test specimens must be
consolidated by _________.
If the concrete is to be Two
consolidated by vibration, a
standard 4 by 8 inch. [100 mm
by 200 mm] cylinder mold
and curing concrete test specimens in
the field Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
Practice C31/C31m gives Making, curing, protecting, and
standardized requirements for transporting
___, ___, ___, and ___, of test
specimens.
For cylinders with a diameter 16 +- 2mm (5/8 inch +- 1/16 inch)
of 150 mm (6 in.) or greater,
the tamping rod must be a
round, straight steel rod with a
diameter of ________.
The minimum frequency of an 150 Hz (9000 vibrations per minute)
internal vibrator used in this
procedure is _____.
The container for obtaining the Metal pan; Wheel Barrow; Flat,
concrete sample used in this Clean, nonabsorbent mixing board.
procedure can be a _____,
_____, or _____.
A 150 by 300 mm (6 by 12 in.) 2 Inch (50 MM)
cylinder mold can be used for
concrete containing aggregate
with particles not exceeding
, _______ in size, without the
need for wet sieving the
concrete.
The sample of concreted used C172/C127M
in molding test specimens
must be obtained in
accordance with what ASTM
Standard/Practice?
When strength specimens are Slump, air content, temperature.
to be made, what three other
test must be made?
After molding test specimens, False, the specimens must be
you should wait two hours moved immediately.
before moving them to the
location of initial storage. True
or False?
The supporting surface on 20 MM/M (1/4 in./ft)
which specimens are stored
shall be level within _____.
For concrete with a slump of Vibration
less than 25 mm (1 in.), the
test specimens must be
consolidated by _________.
If the concrete is to be Two
consolidated by vibration, a
standard 4 by 8 inch. [100 mm
by 200 mm] cylinder mold
