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WorksheetsReinforced Concrete
Total questions: 10
Worksheet time: 30mins
What is the main reason concrete structures develop cracks shortly after construction?
Concrete is too flexible.
Concrete is weak in compression.
Concrete is weak in tension.
Concrete expands too much.
What happens to the bottom edge of a concrete block under tension?
It breaks immediately.
It stretches.
It remains unchanged.
It compresses.
What is the role of steel reinforcement bars in concrete?
To handle tensile forces.
To prevent water absorption.
To increase the weight of the structure.
To make concrete more flexible.
What is the main advantage of reinforced concrete over plain concrete?
It is more expensive.
It requires no maintenance.
It is lighter.
It can bear significantly higher loads.
What is the purpose of pre-compressing concrete?
To change its color.
To make it more brittle.
To reduce tensile stress when an external load is applied.
To increase its weight.
How is pre-compression achieved in concrete?
By heating the concrete.
By stretching the reinforcement bars before pouring concrete.
By manually compressing the concrete.
By adding more water to the concrete mix.
What is post-stressing in concrete?
Compressing the concrete after it has solidified.
Compressing the concrete before it hardens.
Adding more cement to the mix.
Cooling the concrete rapidly.
Why are wedges used in post-stressing?
To keep the cables in tension after the hydraulic jack is removed.
To add weight to the structure.
To make the concrete more flexible.
To prevent water from entering the concrete.
In a cantilever beam, where do tensile stresses develop?
In the bottom fibers.
Evenly throughout the beam.
In the top fibers.
In the middle fibers.
What is the main reason for using reinforcement techniques in concrete?
To make concrete waterproof.
To reduce the cost of construction.
To address concrete's inherent weakness in tension.
To make concrete more colorful.
