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APA Precast Concrete Batch Plant Operator.
Exam Questions And Answers Latest
Updated 2025 |100% Verified.
Concrete is a mixture of _____, ______, and ______. - Answer✔cement, water, and aggregates.
The most commonly used concrete for structural purposes is: - Answer✔Normal weight
concrete.
Normal weight concrete weighs approximately: - Answer✔140 lb/ft^3
Lightweight structural concrete may weigh from _____ to ______ lb/ft^3. - Answer✔90, 100
Heavyweight concrete may weigh ______. - Answer✔200 lb/ft^3 or more.
Most concrete today is made with: - Answer✔Portland Cement
Concrete is usually referred to as a mixture of two components; ______ and _______. -
Answer✔aggregate, paste
The hardening process of the paste is a chemical reaction called _________. -
Answer✔Hydration
1
, ©EVERLY 2025 ALL RIGHTS RESERVED
_______ is developed in the hydration process. It may peak up to _______ degrees. -
Answer✔heat;130 F
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.
A mixture of cement and water is called: - Answer✔paste
When sand is added to paste it is called: - Answer✔mortar or grout
When coarse aggregate is added to mortar, the combination is called ______. -
Answer✔concrete
________ make up about 60 to 75% of the volume of concrete - Answer✔Aggregates
The particle size distribution or combined coarse and fine aggregate gradation should have all
sizes present in adequate amounts. True or False - Answer✔True. If the gradation is evenly
distributed adequately the void content to be filled by the cement paste is minimized. This
process produces a concrete that will hold together without segregating and will minimize the
need for cement or cementitious content.
Minimizing the cement in the mixture also benefits ________ stability, _______ development,
and _________. - Answer✔volume, heat, durability
There are primarily two types of aggregates, _______ or ________. - Answer✔crushed, natural
Crushed aggregates can be either coarse or fine. True or False - Answer✔True
Crushed aggregates were naturally formed and then _______ and _______. - Answer✔mined,
crushed
2
APA Precast Concrete Batch Plant Operator.
Exam Questions And Answers Latest
Updated 2025 |100% Verified.
Concrete is a mixture of _____, ______, and ______. - Answer✔cement, water, and aggregates.
The most commonly used concrete for structural purposes is: - Answer✔Normal weight
concrete.
Normal weight concrete weighs approximately: - Answer✔140 lb/ft^3
Lightweight structural concrete may weigh from _____ to ______ lb/ft^3. - Answer✔90, 100
Heavyweight concrete may weigh ______. - Answer✔200 lb/ft^3 or more.
Most concrete today is made with: - Answer✔Portland Cement
Concrete is usually referred to as a mixture of two components; ______ and _______. -
Answer✔aggregate, paste
The hardening process of the paste is a chemical reaction called _________. -
Answer✔Hydration
1
, ©EVERLY 2025 ALL RIGHTS RESERVED
_______ is developed in the hydration process. It may peak up to _______ degrees. -
Answer✔heat;130 F
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.
A mixture of cement and water is called: - Answer✔paste
When sand is added to paste it is called: - Answer✔mortar or grout
When coarse aggregate is added to mortar, the combination is called ______. -
Answer✔concrete
________ make up about 60 to 75% of the volume of concrete - Answer✔Aggregates
The particle size distribution or combined coarse and fine aggregate gradation should have all
sizes present in adequate amounts. True or False - Answer✔True. If the gradation is evenly
distributed adequately the void content to be filled by the cement paste is minimized. This
process produces a concrete that will hold together without segregating and will minimize the
need for cement or cementitious content.
Minimizing the cement in the mixture also benefits ________ stability, _______ development,
and _________. - Answer✔volume, heat, durability
There are primarily two types of aggregates, _______ or ________. - Answer✔crushed, natural
Crushed aggregates can be either coarse or fine. True or False - Answer✔True
Crushed aggregates were naturally formed and then _______ and _______. - Answer✔mined,
crushed
2
