ACI WRITTEN EXAM QUESTIONS & ANSWERS
False. Relatively dense - Answers - The method of determining air content of concrete
containing lightweight aggregate is the pressure method
True - Answers - Is the following statement true or false? When making a test cylinder
from concrete being used in construction, the field technician must also measure the
slump of the concrete.
Disregard the test and retest on another portion of the sample. - Answers - While the
technician is checking the slump of the concrete, there is a decided falling away or
shearing off of concrete from one side of the sample. What should the technician do?
Determination that at least 8 hours has elapsed since final set. - Answers - Preparation
of specimens for transport includes:
60 to 80 degrees f (16 to 27 degrees C) - Answers - For normal strength concretes,
what temperature range must be maintained for test cylinders during initial curing?
False - Answers - Is the following statement true or false? When concrete contains large
aggregate, the testing technician should wet-sieved the sample before making density
(unit weight) tests for use in yield computations.
3 inches ( 75MM) - Answers - When determining the temperature of fresh mixed
concrete, what is the minimum amount of concrete cover in all directions around the
sensor of the temperature measuring device?
false - Answers - Is the following statement true or false? The sides of the slump mold
should be lightly tapped to consolidate the concrete in the mold.
True - Answers - Is the following statement true or false? Unless specified otherwise,
strength test specimens molded from concrete having a slump less than 25mm (1 inch)
must be consolidated by vibration.
True - Answers - Is the following statement true or false? Test cylinders may be capped
with a thin layer of portland cement paste which is permitted to harden and cure with the
specimen
Flat, tapered, or pointed - Answers - The tamping rod should not be:
15 minutes - Answers - Start molding strength test specimens within _______ after
fabricating the composite sample.
True - Answers - Is the following statement true or false? Representative samples are
required for use in test conducted for the purpose of determining compliance with the
specifications for concrete quality.
False. Relatively dense - Answers - The method of determining air content of concrete
containing lightweight aggregate is the pressure method
True - Answers - Is the following statement true or false? When making a test cylinder
from concrete being used in construction, the field technician must also measure the
slump of the concrete.
Disregard the test and retest on another portion of the sample. - Answers - While the
technician is checking the slump of the concrete, there is a decided falling away or
shearing off of concrete from one side of the sample. What should the technician do?
Determination that at least 8 hours has elapsed since final set. - Answers - Preparation
of specimens for transport includes:
60 to 80 degrees f (16 to 27 degrees C) - Answers - For normal strength concretes,
what temperature range must be maintained for test cylinders during initial curing?
False - Answers - Is the following statement true or false? When concrete contains large
aggregate, the testing technician should wet-sieved the sample before making density
(unit weight) tests for use in yield computations.
3 inches ( 75MM) - Answers - When determining the temperature of fresh mixed
concrete, what is the minimum amount of concrete cover in all directions around the
sensor of the temperature measuring device?
false - Answers - Is the following statement true or false? The sides of the slump mold
should be lightly tapped to consolidate the concrete in the mold.
True - Answers - Is the following statement true or false? Unless specified otherwise,
strength test specimens molded from concrete having a slump less than 25mm (1 inch)
must be consolidated by vibration.
True - Answers - Is the following statement true or false? Test cylinders may be capped
with a thin layer of portland cement paste which is permitted to harden and cure with the
specimen
Flat, tapered, or pointed - Answers - The tamping rod should not be:
15 minutes - Answers - Start molding strength test specimens within _______ after
fabricating the composite sample.
True - Answers - Is the following statement true or false? Representative samples are
required for use in test conducted for the purpose of determining compliance with the
specifications for concrete quality.
