Civil Engineering MCQ – RCC Structures Design

Civil Engineering students can access a comprehensive collection of MCQ (Multiple Choice Questions) and answers related to RCC (Reinforced Concrete) Structures Design. These resources are designed to assist students in preparing for GATE exams, various technical interviews, competitive examinations, and other entrance exams. The RCC Structures Design MCQ section is a crucial chapter for both Civil Engineering and GATE students.

1. What is the primary purpose of reinforcement in RCC?

a) To resist tensile forces
b) To increase concrete strength
c) To enhance thermal properties
d) To reduce construction cost

Answer:

a) To resist tensile forces

Explanation:

Reinforcement in RCC is primarily used to resist tensile forces because concrete is weak in tension but strong in compression.

2. The minimum cover in RCC beams should not be less than:

a) 15 mm
b) 20 mm
c) 25 mm
d) 30 mm

Answer:

b) 20 mm

Explanation:

The minimum cover in RCC beams is usually 20 mm to protect the steel from corrosion and to provide fire resistance.

3. The term 'M20' in concrete mix design refers to:

a) 20% cement content
b) 20 mm aggregate size
c) 20 MPa compressive strength
d) 20 kg/m^3 density

Answer:

c) 20 MPa compressive strength

Explanation:

'M20' refers to the characteristic compressive strength of 20 MegaPascals (MPa) in 28 days.

4. Slenderness ratio in a column is defined as:

a) Height to width ratio
b) Height to depth ratio
c) Effective length to least lateral dimension
d) Cross-sectional area to height ratio

Answer:

c) Effective length to least lateral dimension

Explanation:

Slenderness ratio is the ratio of the effective length of the column to its least lateral dimension, affecting its load-bearing capacity and buckling behavior.

5. The process of arranging the reinforcement and casting concrete around it is known as:

a) Fabrication
b) Curing
c) Formwork
d) Concreting

Answer:

d) Concreting

Explanation:

Concreting is the process of placing and finishing concrete around the reinforcement bars.

6. In RCC, segregation refers to:

a) Separation of aggregate from cement
b) The process of removing formwork
c) Uneven distribution of reinforcement
d) Development of cracks in concrete

Answer:

a) Separation of aggregate from cement

Explanation:

Segregation is the separation of the components of concrete, leading to an inconsistent mix.

7. The modulus of elasticity of concrete is primarily dependent on its:

a) Compressive strength
b) Aggregate size
c) Moisture content
d) Cement type

Answer:

a) Compressive strength

Explanation:

The modulus of elasticity of concrete is closely related to its compressive strength.

8. What does the term 'curing' in concrete technology refer to?

a) Heating the concrete
b) Keeping the concrete moist
c) Adding more cement to the mix
d) Compacting the concrete

Answer:

b) Keeping the concrete moist

Explanation:

Curing is the process of maintaining adequate moisture, temperature, and time to allow the concrete to achieve its desired properties.

9. The design of a beam in RCC primarily involves:

a) Estimation of its length
b) Calculation of bending moments and shear forces
c) Selection of formwork
d) Choosing the type of cement

Answer:

b) Calculation of bending moments and shear forces

Explanation:

Designing an RCC beam involves calculating bending moments and shear forces to determine the size and amount of reinforcement required.

10. The term 'workability' of concrete refers to:

a) Its strength
b) Its durability
c) Its ease of mixing, placing, and compacting
d) Its resistance to weathering

Answer:

c) Its ease of mixing, placing, and compacting

Explanation:

Workability refers to how easily the concrete can be mixed, placed, compacted, and finished.

11. Dowel bars in concrete pavement primarily serve to:

a) Increase the pavement thickness
b) Transfer loads across joints
c) Improve the surface texture
d) Control the temperature variation

Answer:

b) Transfer loads across joints

Explanation:

Dowel bars are used to transfer loads across joints in concrete pavement, ensuring smooth transfer of vehicles.

12. What is the common method to test the compressive strength of concrete?

a) Split tensile test
b) Flexural strength test
c) Cube test
d) Impact test

Answer:

c) Cube test

Explanation:

The cube test is a common method to determine the compressive strength of concrete, where cubes are crushed at a specific age.

13. In RCC, creep refers to:

a) Sudden failure of concrete
b) Long-term deformation under sustained load
c) Initial setting of concrete
d) Expansion of concrete due to heat

Answer:

b) Long-term deformation under sustained load

Explanation:

Creep in concrete is the phenomenon of gradual deformation under a sustained load over time.

14. The main purpose of providing stirrups in a beam is to:

a) Increase its depth
b) Resist shear forces
c) Enhance its aesthetic appeal
d) Reduce its weight

Answer:

b) Resist shear forces

Explanation:

Stirrups are provided in RCC beams to resist shear forces and prevent shear failure.

15. In the context of RCC, what does the term 'spalling' refer to?

a) Expansion of concrete
b) Surface peeling off due to internal stresses
c) Increasing the beam span
d) Adding additional reinforcement

Answer:

b) Surface peeling off due to internal stresses

Explanation:

Spalling refers to the breaking off of concrete surface layers, often due to internal stresses or corrosion of reinforcement.

16. The process of mixing cement, sand, aggregate, and water to form concrete is known as:

a) Batching
b) Blending
c) Forming
d) Casting

Answer:

a) Batching

Explanation:

Batching is the process of measuring and combining the ingredients of concrete in specified proportions.

17. In an under-reinforced RCC beam, failure occurs due to:

a) Crushing of concrete
b) Buckling of steel
c) Yielding of steel
d) Shear failure

Answer:

c) Yielding of steel

Explanation:

In an under-reinforced beam, the steel reinforcement yields before the concrete reaches its ultimate strength, leading to a ductile failure mode.

18. Which of the following is not a characteristic of a good quality concrete?

a) High workability
b) Low strength
c) Durability
d) Impermeability

Answer:

b) Low strength

Explanation:

Good quality concrete should have high strength, along with workability, durability, and impermeability.

19. The bending moment in a simply supported beam carrying a uniform distributed load is highest at:

a) The center of the beam
b) The supports
c) One-third span from the supports
d) Any point along the span

Answer:

a) The center of the beam

Explanation:

In a simply supported beam with a uniform load, the maximum bending moment occurs at the center.

20. Pre-stressed concrete differs from reinforced concrete in that it:

a) Does not use steel reinforcement
b) Uses high-strength concrete only
c) Is pre-loaded to counteract applied loads
d) Is only used for large structures

Answer:

c) Is pre-loaded to counteract applied loads

Explanation:

Pre-stressed concrete involves pre-loading the concrete to induce a compressive stress, which counteracts the tensile stresses due to applied loads.

21. The lap length in RCC beams is provided to:

a) Increase the depth of beam
b) Allow for thermal expansion
c) Ensure proper bond between overlapping bars
d) Decorative purposes

Answer:

c) Ensure proper bond between overlapping bars

Explanation:

Lap length is provided to ensure a proper bond between overlapping reinforcement bars, maintaining the structural integrity.

22. In an RCC column, the longitudinal reinforcement is provided to resist:

a) Torsion
b) Shear
c) Compression
d) Bending

Answer:

c) Compression

Explanation:

Longitudinal reinforcement in a column primarily resists compressive forces.

23. The 'Grade of concrete' refers to:

a) The texture of the concrete surface
b) The size of aggregates used
c) The compressive strength of concrete
d) The type of cement used

Answer:

c) The compressive strength of concrete

Explanation:

The grade of concrete indicates its characteristic compressive strength.

24. The phenomenon of loss of moisture from concrete is known as:

a) Bleeding
b) Segregation
c) Shrinkage
d) Creep

Answer:

c) Shrinkage

Explanation:

Shrinkage is the process of concrete losing moisture, which can lead to cracks if not properly managed.

25. In RCC, the term 'honeycombing' refers to:

a) The pattern formed on the surface due to formwork
b) Small voids and gaps in concrete
c) The arrangement of reinforcement
d) The discoloration of concrete surfaces

Answer:

b) Small voids and gaps in concrete

Explanation:

Honeycombing refers to the presence of voids and gaps in concrete, often due to improper compaction or mixing.

These questions provide a foundational understanding of RCC Structures Design, suitable for beginners in Civil Engineering.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top