Reinforced Concrete Final Actual Exam
Complete Questions with Correct Detailed
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What is the equation for water/cement ratio --- correct answer ---
Weight of water divided by total weight of cement mixture
Most commercial mix designs for structural concrete specify a ratio
between what two numbers? --- correct answer ---.40 & .50
According to section 19.2.1.1, no structural concrete shall be less than
_______ psi in strength. --- correct answer ---2,500
What is the maximum compressive strength requirement of concrete?
--- correct answer ---No maximum, unless specified in special seismic
cases
Concrete is a mixture of: --- correct answer ---Aggregate, Sand,
Cement, and Water
, Portland cement must conform to _____ and normal-weight aggregate
must conform to _____ in all concrete. --- correct answer ---A: ASTM
C150, ASTM C33 B: ASTM C1602, ASTM C33 C: ASTM C1602, ASTM
C150 D: ASTM C33, ASTM C1602
Answer: A ASTM C150, ASTM C33
Structural normal weight concrete MUST contain/produce --- correct
answer ---Potable or non-potable water, cementitious material and
aggregate conforming to ASTM C33
Hydration --- correct answer ---Is an exothermic (heat producing)
chemical reaction that begins when water and cement are combined
The maximum allowable nominal aggregate size for a 6-inch slab is: --
- correct answer ---2 inches: 1/3 the thickness of the slab
What must air entrainment admixtures conform to? --- correct answer
---A: ASTM C260 B: ASTM C1582 C: ASTM C94 D: ASTM C39
Answer: A: ASTM C260