APA Precast Concrete Batch Plant Operator Exam
Questions With 100% Correct Answers 2025
updated
_______ is developed in the hydration process. It may peak up to _______
degrees. - ANSWER-heat;130 F
.________ make up about 60 to 75% of the volume of concrete - ANSWER-
Aggregates
._________ aggregate size is the sieve size that may retain 5% to 15% of the
aggregate depending on the size number - ANSWER-Nominal
.A high strength aggregate always increases the strength of the concrete. True
or False - ANSWER-False ; A high strength aggregate does not necessarily
increase the strength of the concrete. More important is the aggregate's
compatibility with the cement paste and the aggregate's relative
commpressibility, comparted to that of the surrounding cement paste.
.A mixture of cement and water is called: - ANSWER-paste
.According to ASTM C33 the maximum size is the smallest sieve opening that the
aggregate is required to pass. True or False - ANSWER-True
, .Aggregates can effect concrete strength because of their particle ______,
maximum _______, and ________. - ANSWER-shape, size, grading
.Aggregates with excessive fines or angular particles will require less water to
produce a target slump. True or False - ANSWER-False; Aggregates with
excessive fines or angular particles will require MORE water to produce a target
slump.
.An adequate amount of fines passing through the No. 50 sieve is necessary to
hold fresh concrete together without ________. - ANSWER-segregation
.Concrete does hardens and cures by drying. True or False - ANSWER-False ;
Concrete does not harden or cure by drying, because cement needs moisture to
hydrate and gain strength. When concrete dries fully, hydration stops, and it no
longer gains strength.
.Concrete is a mixture of _____, ______, and ______. - ANSWER-cement, water,
and aggregates.
.Concrete is usually referred to as a mixture of two components; ______ and
_______. - ANSWER-aggregate, paste
.Crushed aggregates are also referred to as ________ aggregates - ANSWER-
manufactured aggregates
.Crushed aggregates can be either coarse or fine. True or False - ANSWER-True
Questions With 100% Correct Answers 2025
updated
_______ is developed in the hydration process. It may peak up to _______
degrees. - ANSWER-heat;130 F
.________ make up about 60 to 75% of the volume of concrete - ANSWER-
Aggregates
._________ aggregate size is the sieve size that may retain 5% to 15% of the
aggregate depending on the size number - ANSWER-Nominal
.A high strength aggregate always increases the strength of the concrete. True
or False - ANSWER-False ; A high strength aggregate does not necessarily
increase the strength of the concrete. More important is the aggregate's
compatibility with the cement paste and the aggregate's relative
commpressibility, comparted to that of the surrounding cement paste.
.A mixture of cement and water is called: - ANSWER-paste
.According to ASTM C33 the maximum size is the smallest sieve opening that the
aggregate is required to pass. True or False - ANSWER-True
, .Aggregates can effect concrete strength because of their particle ______,
maximum _______, and ________. - ANSWER-shape, size, grading
.Aggregates with excessive fines or angular particles will require less water to
produce a target slump. True or False - ANSWER-False; Aggregates with
excessive fines or angular particles will require MORE water to produce a target
slump.
.An adequate amount of fines passing through the No. 50 sieve is necessary to
hold fresh concrete together without ________. - ANSWER-segregation
.Concrete does hardens and cures by drying. True or False - ANSWER-False ;
Concrete does not harden or cure by drying, because cement needs moisture to
hydrate and gain strength. When concrete dries fully, hydration stops, and it no
longer gains strength.
.Concrete is a mixture of _____, ______, and ______. - ANSWER-cement, water,
and aggregates.
.Concrete is usually referred to as a mixture of two components; ______ and
_______. - ANSWER-aggregate, paste
.Crushed aggregates are also referred to as ________ aggregates - ANSWER-
manufactured aggregates
.Crushed aggregates can be either coarse or fine. True or False - ANSWER-True
