Question 1

An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
A)300 cm
B)233 cm
C)176 cm
D)236 cm

Accepted Answer

C

Question 2

As the percentage of steel increases
A)Depth of neutral axis decreases
B)Depth of neutral axis increases
C)Lever arm increases
D)Lever armdecreases

Accepted Answer

B

Question 3

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 ofthe column

Accepted Answer

The effective width of a column strip in a flat slab is typically considered to be half the width of the panel. This is a common design assumption to ensure adequate load distribution and structural performance.

Question 4

As per IS : 1343, total shrinkage for a pre-tensioned beam, is A)3.0 × 10^-2 B)3.0 × 10^-3 C)3.0 × 10^-5 D)3.5 × 10^-5

Accepted Answer

According to IS 1343, the total shrinkage strain for pre-tensioned concrete is typically around 3.5 × 10^-5.

Question 5

Based on punching shear consideration, the overall depth of a combined footing under a column A, is
A)(Area of the column A × Safe punching stress)/Load on column A
B)(Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)
C)(Perimeter of column A × Safe punching stress)/(Load on column A × Upward pressure × Area of the column)
D)None of these

Accepted Answer

The correct formula for determining the overall depth of a combined footing under a column A, based on punching shear consideration, takes into account the perimeter of the column, the safe punching stress, the load on the column, and any upward pressure acting over the area of the column. This is accurately represented in option B, which correctly incorporates these factors into the calculation.

Question 6

Pick up the correct statement from the following:
A)A pile is a slender member which transfersthe load through its lower end on a strong strata
B)A pile is a slender member which transfers its load to the surrounding soil
C)A pile is a slender member which transfers its load by friction
D)A pile is a cylindrical body of concrete which transfersthe load at a depth greater than its width

Accepted Answer

A pile transfers its load to the surrounding soil, which can include both end-bearing and frictional support.

Question 7

In a combined footing if shear stress exceeds 5 kg/cm² , the nominal stirrups provided are: A)6 legged B)8 legged C)10 legged D)12 legged

Accepted Answer

The answer of In a combined footing if shear stress...

Question 8

If is weight of a retainingwall and is the horizontal earth pressure, the factor of safety against sliding, is
A)1.0
B)1.25
C)1.5
D)2.0

Accepted Answer

The factor of safety against sliding for retaining walls is typically taken as 1.5 to ensure stability against lateral earth pressures.

Question 9

With usual notations the depth of the neutral axis of a balanced section, is given by
A)mc/t = (d -n)/n
B)t/mc = (d -n)/n
C)t/mc = (d + n)/n
D)mc/t = n/(d - n)

Accepted Answer

The answer of With usual notations the depth of the...

Question 10

Pick up the true statement from the following:
A)Plain ceiling provides the best property diffusing light
B)In the absence of beams, it is easier to installpiping
C)In the absence of beams, it is easier topaint
D)All the above

Accepted Answer

All the statements are true. Plain ceilings help in diffusing light evenly across the room, making the space well-lit. Without beams, there are fewer obstructions, making it easier to install piping and to paint the ceiling.

Question 11

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm² , the length of the beam having nominal reinforcement, is A)8 cm B)6 m C)8 m D)10 m

Accepted Answer

The length of the beam having nominal reinforcement is determined by the span where the shear stress is within the allowable limits. Given the effective span of 16m and the maximum shear stress at the end, a beam with nominal reinforcement would typically be designed to half of this span to ensure shear stresses are within acceptable limits, making the correct answer 8m.

Question 12

The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or
A)12 bardiameters
B)18 bardiameters
C)24 bardiameters
D)30 bardiameters

Accepted Answer

The length of the lap in a compression member is kept greater than the bar diameter multiplied by (Permissible stress in bar / Five times the bond stress) or 24 bar diameters to ensure adequate transfer of stress through bond and to prevent failure.

Question 13

The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as
A)Freyssinet system
B)Magnel-Blaton system
C)C.C.L. standardsystem
D)Lee-McCallsystem

Accepted Answer

The answer of The system in which high tensile alloy...

Question 14

An under-reinforced section means
A)Steel is provided at the underside only
B)Steel provided is insufficient
C)Steel provided on one face only
D)Steel will yieldfirst

Accepted Answer

In an under-reinforced section, the steel reinforcement is designed such that it will yield before the concrete reaches its ultimate strength, ensuring a ductile failure mode. This allows for warning signs before catastrophic failure.

Quiz 4: Concrete Design and Analysis

An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is

As the percentage of steel increases

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

As per IS : 1343, total shrinkage for a pre-tensioned beam, is

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

Pick up the correct statement from the following:

In a combined footing if shear stress exceeds 5 kg/cm2 , the nominal stirrups provided are:

If is weight of a retainingwall and is the horizontal earth pressure, the factor of safety against sliding, is

With usual notations the depth of the neutral axis of a balanced section, is given by

Pick up the true statement from the following:

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2 , the length of the beam having nominal reinforcement, is

The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or

The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as

An under-reinforced section means

In a combined footing if shear stress exceeds 5 kg/cm² , the nominal stirrups provided are:

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm² , the length of the beam having nominal reinforcement, is