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WorksheetsWhat is Concrete?
Total questions: 27
Worksheet time: 16mins
What is concrete made of? Fill in the blank: Concrete is a mixture of ________, sand, gravel, and water.
cement
clay
plastic
wood
Which of the following is NOT a common use of concrete?
Building sidewalks
Building walls
Building floors
Making clothes
What is the binder used in the main ingredients of concrete?
Cement
Sand
Gravel
Water
Which ingredient in concrete is known as the fine aggregate?
Sand
Gravel
Cement
Water
Which ingredient in concrete is referred to as the coarse aggregate?
Gravel
Sand
Cement
Water
Which ingredient activates the mix in concrete?
Water
Sand
Cement
Gravel
What is the purpose of gravel in a mixture?
Holds everything together
Fills gaps and strengthens
Adds durability and bulk
Starts the hardening process
What is the purpose of water in a mixture?
Holds everything together
Fills gaps and strengthens
Adds durability and bulk
Starts the hardening process
Fill in the blank: C₃S + H₂O → ______ + CH + Heat
CSH
CaO
SiO₂
H₂SO₄
Fill in the blank: C₃A + H₂O → ______ + Heat
C₃AH₆
C₃S₂H₈
C₄AF
C₂S
Fill in the blank: C₄AF + H₂O → ______ + CFH + Heat
C₃AH₆
C₂S
C₃S
C₄AH₁₃
What is the common mix ratio for concrete?
1 part cement : 2 parts sand : 3 parts gravel
2 parts cement : 1 part sand : 3 parts gravel
1 part cement : 3 parts sand : 2 parts gravel
3 parts cement : 2 parts sand : 1 part gravel
Fill in the blank: Add just enough ______ for a workable consistency when mixing concrete.
water
sand
cement
gravel
Too much water weakens concrete.
True
False
What should be added slowly during the mixing process?
Water
Salt
Sugar
Oil
What is the goal of mixing the materials in the mixing process?
Mix until uniform
Mix until separated
Mix until heated
Mix until cooled
What is the purpose of using a Slump Test in concrete work?
To check workability.
To measure compressive strength.
To determine curing time.
To assess color uniformity.
What is the result of concrete being too wet?
It becomes weak
It cracks
It hardens quickly
It becomes more durable
When pouring and curing concrete, you should avoid freezing or ______ too fast.
drying
mixing
heating
pouring
What are the workers in the image doing to help cure the concrete?
Painting the surface
Covering it to keep it moist
Breaking the concrete
Heating the concrete
What should you wear when working with cement?
Gloves, goggles, and mask.
Sandals and shorts.
A suit and tie.
Just a hat.
What should you avoid when working with wet cement?
Skin contact with wet cement.
Wearing safety gloves.
Using protective eyewear.
Washing hands after work.
What should you do after using tools?
Clean tools after use.
Leave tools as they are.
Throw tools away.
Hide tools from others.
Concrete is classified as a (a) change
what tool did we use in class to smooth out and transfer the concrete into our molds?
(a)
The wooden or plastic beams that support the concrete as it dries is called a (a) .
The sand and gravel are labeled as fine and coarse (a) .
