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ECE 302 Quiz 4
Material Covered: Week 3-5, Fall 2017
Date:_____________________
Name:_________________________ UIN ______KEYS____________
Please read the questions carefully and thoroughly before choosing your answer
1. What is the difference between cement and
concrete?
a. None, cement and concrete are
synonyms
b. Cement is stronger than concrete
c. Cement is the glue in a concrete mix
d. Concrete is the opposite of cement
e. None of the above
2. ________refers to the third stage of hydration
in which concrete gains strength.
a. Plastic state
b. Setting
c. Hardening
d. Shrinkage
e. None of the above
3. The “dispersed phase” in a concrete mix is
created by the aggregates, so what constitutes
the “continuous phase”?
a. The sand
b. The water
d. All of the above
e. None of the above
6. ________refers to the ease of mixing,
handling and placing concrete into a structure.
a. Tenacity
b. Plasticity
c. Workability
d. Softness
e. None of the above
Questions 7 through 9 relate to the following
problem: Assuming a w/c ratio of 0.42, a density of
150 pcf, and a degree of hydration (α) of 0.8,
calculate the total porosity, the compressive
strength (f’c) and the Modulus of Elasticity (E).
32.0/
36.0/
cw
cw
Pc
32.0/
16.0
cw
Pg
gcT PPP
