Deck 4: Construction and Design Specifications

Question 1

In a singly reinforced beam, the effective depth is measured from its compression edge to

A)Tensile edge
B)Tensile reinforcement
C)Neutral axis of the beam
D)Longitudinal centralaxis

Answer 1

Tensile edge

Question 2

The minimum number of main steel bars provided in R.C.C.

A)Rectangular columns is 4
B)Circular columns is 6
C)Octagonal columns is 8
D)All the above

Answer 2

All the above

Question 3

If the size of a column is reduced above the floor, the main bars of the columns, are

A)Continued up
B)Bent inward at the floor level
C)Stopped just below the floor level and separate lap barsprovided
D)All the above

Answer 3

All the above

Question 4

In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called

A)Under-reinforced section
B)Over reinforced section
C)Economic section
D)Critical section

Question 5

Distribution of shear intensity over a rectangular section of a beam, follows:

A)A circular curve
B)A straight line
C)A parabolic curve
D)An ellipticalcurve

Question 6

Distribution reinforcement in a simply supported slab, is provided to distribute

A)Load
B)Temperature stress
C)Shrinkage stress
D)All the above

Question 7

Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at

A)Supports
B)Mid span
C)Every section
D)Quarter span

Question 8

An R.C.C. column is treated as long if its slenderness ratio is greater than

A)30
B)35
C)40
D)50

Question 9

If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than

A)4 mm
B)5 mm
C)6 mm
D)8 mm

Question 10

The weight of a foundation is assumed as

A)5% of wallweight
B)7% of wallweight
C)10% of wall weight
D)12% of wall weight

Question 11

For M 15 mix concrete, according to I.S. specifications, local bond stress, is

A)5 kg/cm²
B)10 kg/cm²
C)15 kg/cm²
D)20 kg/cm²

Question 12

As per I.S. 456 - 1978, the pH value of water shall be

A)Less than 6
B)Equal to 6
C)Not less than 6
D)Equal to 7

Question 13

If diameter of a reinforcement bar is d, the anchorage value of the hook is

A)4d
B)8d
C)12d
D)16d

Question 14

If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by

A)0.2
B)0.3
C)0.4
D)0.5

Question 15

The maximum shear stress (qmax) in a rectangular beam is

A)1.25 times the average
B)1.50 times the average
C)1.75 times the average
D)2.0 times theaverage

Question 16

Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds Drop panel

A)50 cm
B)75 cm
C)100 cm
D)120 cm

Question 17

In a slab, the pitch of the main reinforcement should not exceed its effective depth

A)Three times
B)Four times
C)Five times
D)Two times

Question 18

The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is

A)25
B)30
C)35
D)40

Question 19

By over-reinforcing a beam, the moment of resistance can be increased not more than

A)10 %
B)15 %
C)20 %
D)25 %

Question 20

For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed

A)10
B)15
C)20
D)25

Question 21

A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis

A)1/7 to 1/3 of rib depth
B)1/3 to 1/2 of rib depth
C)1/2 to 3/4 of rib depth
D)1/3 to 2/3 of rib depth

Question 22

A ribbed slab is provided for

A)A plain ceiling
B)Thermal insulation
C)Acousticinsulation
D)All the above

Question 23

A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds

A)10
B)15
C)20
D)25

Question 24

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 bardiameters
B)24 bardiameters
C)30 bardiameters
D)36 bar diameters

Question 25

The weight of reinforced concrete, is generally taken as

A)2200 kg/m³
B)2300 kg/m³
C)2400 kg/m³
D)2500 kg/m³