WorksheetsChap 9 Concrete and Foundations
Total questions: 25
Worksheet time: 52mins
Concrete is a mixture of ____.
portland cement, aggregate, and water
grout, sand, and water
mortar, grout, and water
grout, mortar and sand
When cement absorbs moisture from the air and gets hard lumps in it, it is called ____.
dehydration
prehydration
lump cement
post hydration
The hardening of concrete is called ____.
filtering
hydration
cementation
aggravation
Water is safe to use in concrete if it ____.
looks clean
has salt in it
is safe to drink
does not have chlorine in it
The amount of water in relation to the amount of portland cement is called ____.
water-cement ratio
dry-liquid ration
strength flow ratio
all aswers are correct
Aggregates serve as ____.
fillers in cement
reactors in cement
liquid absorbers in cement
All answers are correct
Typical strengths for concrete are ____
d 2500 to 4500 pounds per square inch
1000 to 2500 pounds per square inch
500 to 1000 pounds per square inch
100 to 500 pounds per square inch
The overall strength of concrete is determined by ____
the amount of water used
the amount of portland used
the size of the aggregate used
all are correct
In one cubic yard of concrete there are ____.
27 cubic feet
9 cubic feet
3 cubic feet
1 cubic foot
A transit mix truck can carry up to ____ cubic yards of concrete.
5
8
10
15
Concrete has a high ____.
compressive strength
b. tensile strength
bending strength
all of the above
When steel bars are used to increase concrete’s tensile strength, the concrete is then called
tensile strong concrete
rebarred concrete
strengthened concrete
reinforced concrete
A #6 rebar has a ____ diameter.
3/8''
3/4''
5/8''
1/16''
Wire used to reinforce concrete floor slabs is called ____
gauged wire
re-wire
welded wire mesh
ground slab wire
Concrete is not poured, it is ____.
shoveled
screened
placed
raked
A test done on the job site to test the consistency of concrete is called a ____
consistency test
water mixture test
slump test
reaction test
Concrete should be placed in forms in layers of not more than ____
12 to 18 inches thick
2 to 4 feet thick
5 to 10 feet thick
10 to 15 feet thick
Vibrators eliminate ____.
rapid curing
water loss
honeycombs
low tensile strength
Rapid loss of moisture in concrete causes ____
the concrete to gain more strength
the concrete to swell
the concrete to strengthen above 95 percent
the concrete to crack
In areas where frost/freezing occurs, footing must be placed ____.
at least 12 inches deep
at least 26 inches deep
twice the depth of the width of the footer
below the frost line
To provide a lock between the footing and the foundation, a ____
steel rod is inserted
keyway is formed
lugway is formed
step support is formed
Doubled 2 x 4 pieces with a space between them for form support are called ____
callers
criers
ties
walers
To keep forms from sticking to the concrete they are covered with ____.
latex paint
salt water
oil
all will work
How many cubic yards of concrete are necessary for a wall 8 inches thick, 9 feet high and 22 feet long?
58.6 cubic yards
132 cubic yards
4.8 cubic yards
d. 14 cubic yards
Fiberglass strands are sometimes used in concrete as ____.
curing additive
rebars
a mixing agent
reinforcement
