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WorksheetsIntroduction to Concrete
Total questions: 10
Worksheet time: 6mins
Name
Class
Date
1.
Which of the following is not true about concrete?
a)
High compressive strength
b)
High tensile strength
c)
Low maintenance
d)
Low porosity
2.
Which of the following is the correct definition of hydration?
a)
Trapping water in curing concrete
b)
Adding too much water to a concrete mixture
c)
A process where concrete hardens
d)
Adding water to concrete mixture to create a past
3.
What percentage of cement should be aggregate?
a)
50%
b)
65-75%
c)
80%
d)
As much as the mixture can hold
4.
What does the term gradation mean?
a)
Making sure concrete is placed flat
b)
The slope of cured concrete
c)
Ensuring aggregate mixture is made of many different sizes
d)
The quality of a concrete mixture
5.
The two most important ingredients in concrete are
a)
water and cement
b)
water and aggregate
c)
aggregate and cement
d)
fine and coarse aggregate
6.
What is the definition of porosity?
a)
The number of holes in cured concrete
b)
The size of air spaces in cured concrete
c)
How easily a concrete mixture flows
d)
the ratio of voids to total concrete volume
7.
In a traditional mix design by volume, a ratio of 1:2:3 is used. What does the 1, 2, and 3 represent?
a)
sand, cement, and gravel
b)
cement, gravel and water
c)
cement, sand, and gravel
d)
gravel, sand, and cement
8.
"Slump" is a test of
a)
consistency
b)
hydration
c)
porosity
d)
strength
9.
The maximum amount of time a concrete mix can sit is
a)
1 hour
b)
2 hours
c)
4 hours
d)
5 hours
10.
Which of the following happens when there is inadequate vibrations when consolidating concrete?
a)
heavy aggregates sink
b)
reducing hydration time
c)
a layer of water will form near the top
d)
honeycombing
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