Q. What is the main function of coarse aggregates in concrete?
A.
To provide thermal insulation
B.
To reduce shrinkage
C.
To enhance the compressive strength
D.
To improve aesthetic appearance
Show solution
Solution
Coarse aggregates provide bulk and strength to concrete, contributing significantly to its compressive strength.
Correct Answer:
C
— To enhance the compressive strength
Learn More →
Q. What is the main function of fly ash in concrete?
A.
To increase the density
B.
To reduce shrinkage
C.
To enhance workability
D.
To improve long-term strength
Show solution
Solution
Fly ash is used in concrete to improve long-term strength and durability, as well as to enhance workability.
Correct Answer:
D
— To improve long-term strength
Learn More →
Q. What is the main function of fly ash when used as a cement replacement?
A.
To increase the density of concrete
B.
To improve workability and reduce permeability
C.
To enhance the color of concrete
D.
To decrease the setting time
Show solution
Solution
Fly ash improves workability and reduces permeability when used as a cement replacement.
Correct Answer:
B
— To improve workability and reduce permeability
Learn More →
Q. What is the main function of steel reinforcement in concrete structures?
A.
To improve thermal insulation
B.
To resist tensile forces
C.
To reduce weight
D.
To enhance aesthetic appeal
Show solution
Solution
Steel reinforcement is used in concrete structures to resist tensile forces, as concrete is weak in tension.
Correct Answer:
B
— To resist tensile forces
Learn More →
Q. What is the main function of steel reinforcement in concrete?
A.
To improve thermal insulation
B.
To resist tensile forces
C.
To enhance aesthetic appeal
D.
To reduce weight
Show solution
Solution
Steel reinforcement is used in concrete to resist tensile forces, as concrete is strong in compression but weak in tension.
Correct Answer:
B
— To resist tensile forces
Learn More →
Q. What is the main function of using fly ash as an admixture in concrete?
A.
To increase the weight of concrete
B.
To enhance workability and reduce permeability
C.
To change the color of concrete
D.
To decrease the setting time
Show solution
Solution
Fly ash is used as an admixture to enhance workability, reduce permeability, and improve the long-term strength of concrete.
Correct Answer:
B
— To enhance workability and reduce permeability
Learn More →
Q. What is the main purpose of the slump test?
A.
To measure the density of concrete
B.
To assess the workability of concrete
C.
To determine the compressive strength
D.
To evaluate the curing process
Show solution
Solution
The slump test is used to assess the workability of concrete, indicating how easily it can be mixed and placed.
Correct Answer:
B
— To assess the workability of concrete
Learn More →
Q. What is the main purpose of using admixtures in concrete?
A.
To change the color of concrete
B.
To improve workability and durability
C.
To reduce the weight of concrete
D.
To increase the cost of concrete
Show solution
Solution
Admixtures are used to improve the workability, durability, and other properties of concrete without significantly altering its composition.
Correct Answer:
B
— To improve workability and durability
Learn More →
Q. What is the main purpose of using fly ash as a partial replacement for cement?
A.
To increase the weight of concrete
B.
To improve workability
C.
To enhance durability and reduce permeability
D.
To decrease the setting time
Show solution
Solution
Fly ash is used as a partial replacement for cement to enhance durability and reduce permeability in concrete.
Correct Answer:
C
— To enhance durability and reduce permeability
Learn More →
Q. What is the main purpose of using fly ash as a supplementary cementitious material?
A.
To increase the weight of concrete
B.
To improve workability and durability
C.
To reduce the cost of concrete
D.
To enhance color
Show solution
Solution
Fly ash improves the workability and durability of concrete while also reducing the heat of hydration.
Correct Answer:
B
— To improve workability and durability
Learn More →
Q. What is the main purpose of using steel reinforcement in concrete structures?
A.
To reduce weight
B.
To improve thermal insulation
C.
To enhance tensile strength
D.
To increase aesthetic appeal
Show solution
Solution
Steel reinforcement is used in concrete to enhance its tensile strength, as concrete is weak in tension.
Correct Answer:
C
— To enhance tensile strength
Learn More →
Q. What is the maximum size of coarse aggregate typically used in concrete mix design?
A.
10 mm
B.
20 mm
C.
40 mm
D.
50 mm
Show solution
Solution
The maximum size of coarse aggregate used in concrete mix design is typically 20 mm, but can go up to 40 mm depending on the application.
Correct Answer:
C
— 40 mm
Learn More →
Q. What is the maximum size of coarse aggregate typically used in concrete?
A.
10 mm
B.
20 mm
C.
40 mm
D.
50 mm
Show solution
Solution
The maximum size of coarse aggregate used in concrete is typically 20 mm to 40 mm, depending on the application.
Correct Answer:
C
— 40 mm
Learn More →
Q. What is the primary advantage of using high-strength steel in construction?
A.
Lower cost
B.
Reduced weight of structures
C.
Easier fabrication
D.
Better corrosion resistance
Show solution
Solution
High-strength steel allows for reduced weight of structures, leading to more efficient designs.
Correct Answer:
B
— Reduced weight of structures
Learn More →
Q. What is the primary advantage of using lightweight aggregates in concrete?
A.
Increased thermal conductivity
B.
Reduced weight of concrete
C.
Higher compressive strength
D.
Lower cost
Show solution
Solution
Lightweight aggregates reduce the weight of concrete, making it suitable for applications where weight is a concern.
Correct Answer:
B
— Reduced weight of concrete
Learn More →
Q. What is the primary benefit of using high-performance concrete?
A.
Lower cost
B.
Higher durability and strength
C.
Easier to work with
D.
Faster curing time
Show solution
Solution
High-performance concrete offers higher durability and strength, making it suitable for demanding applications.
Correct Answer:
B
— Higher durability and strength
Learn More →
Q. What is the primary benefit of using lightweight aggregates in concrete?
A.
Increased compressive strength
B.
Reduced thermal conductivity
C.
Lower cost of materials
D.
Improved aesthetic appeal
Show solution
Solution
Lightweight aggregates reduce the overall density of concrete, which can lead to increased compressive strength and improved thermal insulation properties.
Correct Answer:
B
— Reduced thermal conductivity
Learn More →
Q. What is the primary characteristic of high-performance concrete?
A.
Low cost
B.
High workability
C.
Enhanced durability and strength
D.
Lightweight
Show solution
Solution
High-performance concrete is characterized by its enhanced durability and strength, making it suitable for demanding applications.
Correct Answer:
C
— Enhanced durability and strength
Learn More →
Q. What is the primary characteristic of high-strength concrete?
A.
Low water-cement ratio
B.
High aggregate content
C.
Increased air content
D.
Use of lightweight aggregates
Show solution
Solution
High-strength concrete is characterized by a low water-cement ratio, which enhances its strength and durability.
Correct Answer:
A
— Low water-cement ratio
Learn More →
Q. What is the primary characteristic of lightweight aggregates?
A.
High thermal conductivity
B.
Low density
C.
High water absorption
D.
High compressive strength
Show solution
Solution
Lightweight aggregates are characterized by their low density, which helps reduce the overall weight of concrete.
Correct Answer:
B
— Low density
Learn More →
Q. What is the primary function of a concrete curing compound?
A.
To accelerate the setting time
B.
To prevent moisture loss
C.
To enhance color
D.
To increase strength
Show solution
Solution
The primary function of a curing compound is to prevent moisture loss from the concrete surface, ensuring proper hydration.
Correct Answer:
B
— To prevent moisture loss
Learn More →
Q. What is the primary function of admixtures in concrete?
A.
To reduce the cost of materials
B.
To enhance specific properties of concrete
C.
To increase the weight of concrete
D.
To replace cement in the mix
Show solution
Solution
Admixtures are used to enhance specific properties of concrete, such as workability, setting time, and durability.
Correct Answer:
B
— To enhance specific properties of concrete
Learn More →
Q. What is the primary function of bricks in construction?
A.
Insulation
B.
Structural support
C.
Aesthetic appeal
D.
Waterproofing
Show solution
Solution
The primary function of bricks in construction is to provide structural support, forming walls and other load-bearing elements.
Correct Answer:
B
— Structural support
Learn More →
Q. What is the primary function of cement in concrete?
A.
To provide tensile strength
B.
To bind aggregates together
C.
To improve workability
D.
To reduce weight
Show solution
Solution
Cement acts as a binding agent that holds the aggregates together in concrete.
Correct Answer:
B
— To bind aggregates together
Learn More →
Q. What is the primary function of coarse aggregates in concrete?
A.
To provide color
B.
To reduce shrinkage
C.
To provide bulk and strength
D.
To enhance workability
Show solution
Solution
Coarse aggregates provide bulk and strength to concrete, making it more durable.
Correct Answer:
C
— To provide bulk and strength
Learn More →
Q. What is the primary function of steel reinforcement in concrete structures?
A.
To provide thermal insulation
B.
To enhance tensile strength
C.
To reduce weight
D.
To improve aesthetics
Show solution
Solution
Steel reinforcement is primarily used to enhance the tensile strength of concrete structures, which are weak in tension.
Correct Answer:
B
— To enhance tensile strength
Learn More →
Q. What is the primary function of steel reinforcement in concrete?
A.
To improve thermal insulation
B.
To enhance tensile strength
C.
To reduce weight
D.
To increase workability
Show solution
Solution
Steel reinforcement is added to concrete to enhance its tensile strength, as concrete is weak in tension.
Correct Answer:
B
— To enhance tensile strength
Learn More →
Q. What is the primary function of using fly ash in concrete?
A.
To increase the weight of concrete
B.
To improve workability and durability
C.
To reduce the cost of cement
D.
To enhance the color of concrete
Show solution
Solution
Fly ash is used in concrete to improve workability, reduce permeability, and enhance durability.
Correct Answer:
B
— To improve workability and durability
Learn More →
Q. What is the primary function of using superplasticizers in concrete?
A.
To increase the density of concrete
B.
To reduce the water content while maintaining workability
C.
To accelerate the curing process
D.
To enhance the color of concrete
Show solution
Solution
Superplasticizers allow for a reduction in water content while maintaining the desired workability of the concrete.
Correct Answer:
B
— To reduce the water content while maintaining workability
Learn More →
Q. What is the primary ingredient in Portland cement?
A.
Limestone
B.
Clay
C.
Gypsum
D.
Sand
Show solution
Solution
Portland cement is primarily made from limestone, which is heated to produce clinker.
Correct Answer:
A
— Limestone
Learn More →
Showing 31 to 60 of 189 (7 Pages)
