Instruction: Encircle the correct answer.
CONCRETE
a. True
b. False
13. Concrete is a composite material made from cement, water, sand, and aggregates.
a. True
b. False
14. Concrete has high tensile strength without any reinforcement.
a. True
b. False
15. Concrete takes about 28 days to reach maximum strength.
a. True
b. False
16. Rebar is used to provide tensile strength to concrete structures.
a. True
b. False
17. Concrete is a major source of greenhouse gas emissions due to cement production.
a. True
b. False
18. Concrete is only used for small-scale construction projects.
a. True
b. False
19. Concrete can be poured into any shape and hardens into a stone-like material.
a. True
b. False
20. Reinforced concrete embeds steel for additional strength.
b. Nitrogen
c. Greenhouse
d. Hydrogen
28. Concrete is commonly used in the construction of .
a. Dams
b. Furniture
c. Appliances
d. Paintings
29. Lightweight and waterproof
concretes are examples of
concretes.
a. Decorative
b. Specialized
c. Basic
d. Temporary
30. Concrete can be poured into any shape and hardens into a - like material.
a. Wood
b. Glass
c. Stone
d. Clay
31. The average curing period for concrete is days.
a. 7
b. 14
c. 21
d. 28
32. Reinforced concrete embeds
for added strength.
a. Copper
b. Steel
c. Aluminum
d. Zinc
33. Which of the following is a
composite/synthetic building material?
58
Pumped concrete is commonly used
for high-rise buildings
a.
True
b.
False
59
Vacuum concrete needs 28 days to
reach full strength
a.
True
b.
False
60
Permeable concrete allows water to
pass through it
a. True
b. False
61
Shotcrete is applied using high air
pressure
a.
True
b.
False