LADOTD SAMPLING AND TESTING
PLASTIC CONCRETE QUESTIONS &
ANSWERS
The common components of concrete are ....... - ANSWERAggregate, Cement, and
Water
What cement is the most common type of cement used today? - ANSWERPortland
Cement
The _______ to _______ ratio is the most important factor in producing good concrete. -
ANSWERWater to Cement
List at least three tests performed on plastic concrete - ANSWERSlump, Strength
(Cylinder), Density, Volumetric Air, Pressurized Air
List five of the pieces of equipment needed to sample fresh concrete -
ANSWERWheelbarrow, sampling shovel, scoop, Trowel, Timer, Watch, Thermometer,
Identification Forms, Testing Equipment
The sampling area should be free from any _________ and _____________ -
ANSWERloose debris and contamination
The concrete sample should only be obtained from one location in the discharge pile. -
ANSWERFalse
You should avoid getting any of the subgrade into the sample - ANSWERTrue
A sample can be directly discharged into a wheelbarrow or other suitable container
when sampled from a transport with a chute or a pump system. - ANSWERTrue
It is not necessary to allow sufficient material to coat the chute before taking a sample. -
ANSWERFalse
A separate sample should be taken for every test or procedure being performed. -
ANSWERFalse
A _________ is a suitable container for a sampling because it allows the tester to
transport material from the sampling are to the test area. - ANSWERWheelbarrow
The time needed between sampling and testing should not exceed ______ minutes -
ANSWER15
PLASTIC CONCRETE QUESTIONS &
ANSWERS
The common components of concrete are ....... - ANSWERAggregate, Cement, and
Water
What cement is the most common type of cement used today? - ANSWERPortland
Cement
The _______ to _______ ratio is the most important factor in producing good concrete. -
ANSWERWater to Cement
List at least three tests performed on plastic concrete - ANSWERSlump, Strength
(Cylinder), Density, Volumetric Air, Pressurized Air
List five of the pieces of equipment needed to sample fresh concrete -
ANSWERWheelbarrow, sampling shovel, scoop, Trowel, Timer, Watch, Thermometer,
Identification Forms, Testing Equipment
The sampling area should be free from any _________ and _____________ -
ANSWERloose debris and contamination
The concrete sample should only be obtained from one location in the discharge pile. -
ANSWERFalse
You should avoid getting any of the subgrade into the sample - ANSWERTrue
A sample can be directly discharged into a wheelbarrow or other suitable container
when sampled from a transport with a chute or a pump system. - ANSWERTrue
It is not necessary to allow sufficient material to coat the chute before taking a sample. -
ANSWERFalse
A separate sample should be taken for every test or procedure being performed. -
ANSWERFalse
A _________ is a suitable container for a sampling because it allows the tester to
transport material from the sampling are to the test area. - ANSWERWheelbarrow
The time needed between sampling and testing should not exceed ______ minutes -
ANSWER15
