RCC Structures Design MCQ Questions & Answers

1

Based on punching shear consideration, the overall depth of a combined footing under a column A, is

A) $$\frac{{{\text{Area of the column A}} \times {\text{Safe punching stress}}}}{{{\text{Load on column A}}}}$$ B) $$\frac{{{\text{Perimeter of column A}} \times {\text{Safe punching stress}}}}{{{\text{Load on column A}} + {\text{Upward pressure}} \times {\text{Area of column}}}}$$ C) $$\frac{{{\text{Perimeter of column A}} \times {\text{Safe punching stress}}}}{{{\text{Load on column A}} \times {\text{Upward pressure}} \times {\text{Area of column}}}}$$ D) None of these

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Answer & Solution

Answer: Option B

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2

According to load factor method, the permissible load ‘W’ on a short column reinforced with longitudinal bars and lateral stirrups, is

A) Stress in concrete × area of concrete B) Stress in steel × area of steel C) Stress in concrete × area of concrete + Stress in steel × area of steel D) None of these

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Answer & Solution

Answer: Option C

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3

High strength concrete is used in pre-stressed member

A) To overcome high bearing stresses developed at the ends B) To overcome bursting stresses at the ends C) To provide high bond stresses D) All the above

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Answer & Solution

Answer: Option D

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4

Design of R.C.C. cantilever beams, is based on the resultant force at

A) Fixed end B) Free end C) Mid span D) Mid span and fixed support

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Answer & Solution

Answer: Option A

Solution:

The correct answer is Option A: Fixed end
Here's why:

A cantilever beam is a beam that's fixed at one end (the fixed end) and free at the other end (the free end).

Think about it like a diving board. The part attached to the pool deck is the fixed end, and the end you jump off is the free end.

When a load is applied to a cantilever beam, the maximum bending moment (the force that causes bending) and shear force (the force that causes sliding) occur at the fixed end.

Therefore, the design of a reinforced concrete cantilever beam (R.C.C.) is primarily based on these maximum forces at the fixed end to ensure it can withstand the load without failing.

* Free end: The bending moment and shear force are typically zero at the free end.
* Mid span: The bending moment and shear force are present at the mid-span, but they're not the maximum values that the beam needs to be designed for.
* Mid span and fixed support: While both locations experience forces, the fixed support is where the maximum forces are concentrated.

5

The diameter of longitudinal bars of a column should never be less than

A) 6 mm B) 8 mm C) 10 mm D) 12 mm

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Answer & Solution

Answer: Option D

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6

The effective width of a column strip of a flat slab, is

A) One-fourth the width of the panel B) Half the width of the panel C) Radius of the column D) Diameter of the column

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Answer & Solution

Answer: Option B

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7

The neutral axis of a T-beam exists

A) Within the flange B) At the bottom edge of the slab C) Below the slab D) All the above

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Answer & Solution

Answer: Option D

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8

The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than

A) 18 bar diameters B) 24 bar diameters C) 30 bar diameters D) 36 bar diameters

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Answer & Solution

Answer: Option C

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9

As the percentage of steel increases

A) Depth of neutral axis decreases B) Depth of neutral axis increases C) Lever arm increases D) Lever arm decreases

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Answer & Solution

Answer: Option B

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10

A raft foundation is provided if its area exceeds the plan area of the building by

A) 10% B) 20% C) 40% D) 50%

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Answer & Solution

Answer: Option D

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RCC Structures Design MCQ Questions & Answers | Civil Engineering