Question 1

For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection limits should be

Accepted Answer

A)  600 mm
B)  750 mm
C)  900 mm
D)  more than 1 m D

Question 2

A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is

Accepted Answer

A)  2.5
B)  2.0
C)  Less than 2
D)  Less than 2.5 A

Question 3

The stress strain curve for concrete is considered parabolic by I.S. code upto a strain of

Accepted Answer

A)  0.0015
B)  0.0020
C)  0.0030
D)  0.0035 D

Question 4

In a beam the local bond stress Sb, is equal to

Accepted Answer

A)  Shear force/(Leaver arm × Total perimeter of reinforcement) 
B)  Total perimeter of reinforcement/(Leaver arm × Shear force) 
C)  Leaver arm/(Shear force × Total perimeter of reinforcement) 
D)  Leaver arm/(Bending moment × Total perimeter ofreinforcement)

Question 5

Limit state method is based on probable

Accepted Answer

A)  Load
B)  Strength.
C)  Both A and B
D)  none

Question 6

When minimum eccentricity in columns does not exceed 0.05 times the lateral dimension, the axial load carrying capacity is reduced by

Accepted Answer

A)  8%
B)  11%
C)  14%
D)  20%

Question 7

The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called

Accepted Answer

A)  Balanced section
B)  Economic section
C)  Critical section
D)  All the above

Question 8

The vertical portion of a step in a stairs case, is known as

Accepted Answer

A)  Rise
B)  Flight
C)  Winder
D)  Tread

Question 9

If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment

Accepted Answer

A)  WL/2
B)  WL/4
C)  WL/6
D)  WL/8

Question 10

For stairs spanning horizontally, the minimum waist provided is

Accepted Answer

A)  4 cm
B)  6 cm
C)  8 cm
D)  12 cm

Question 11

For m20 grade of concrete, the maximum shear stress shall not exceed

Accepted Answer

A)  1.6 N/mm2
B)  1.9 N/mm2
C)  2.8 N/mm2
D)  2.2 N/mm2

Question 12

Minimum grade of concrete for moderate exposure with normal weight aggregates is

Accepted Answer

A)  M 15
B)  M 20
C)  M 25
D)  M 35

Question 13

The maximum percentage of moment redistribution allowed in RCC beams is

Accepted Answer

A)  10%
B)  20%
C)  30%
D)  40%

Question 14

The number of treads in a flight is equal to

Accepted Answer

A)  Risers in the flight
B)  Risers plus one
C)  Risers minus one
D)  None of these

Question 15

For water retaining structures, minimum grade of concrete to be used is

Accepted Answer

A)  M 15
B)  M 20
C)  M 25
D)  M 40

Question 16

The ratio of permissible shear stress in limit state method oof design and working stress method of design is

Accepted Answer

A)  25 : 16
B)  5 : 4
C)  16 : 25
D)  4 : 5

Question 17

If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

Accepted Answer

A)  28 d
B)  38 d
C)  48 d
D)  58 d

Question 18

If no compression steel is used, two suspended bars of minimum ______ diameter should be used to support shear reinforcement

Accepted Answer

A)  8 mm
B)  10 mm
C)  12 mm
D)  16 mm

Question 19

The load carrying capacity of helically reinforced column as compared to

Accepted Answer

A)  5% less
B)  10% less
C)  5% more
D)  10% more

Question 20

The bond strength between steel and concrete is due to

Accepted Answer

A)  friction
B)  adhesion
C)  both friction and adhesion
D)  None of these

Exam 5: Structure Integrity and Rigidity