Deck 2: Concrete Construction and Reinforcement

Question 1

The self-weight of the footing, is

A)Not considered for calculating the upward pressure on footing
B)Also considered for calculating the upward pressure on footing
C)Not considered for calculating the area of the footing
D)Both (b) and (c)

Answer 1

Not considered for calculating the upward pressure on footing

Question 2

Pick up the incorrect statement from the following:

A)In the stem of a retaining wall, reinforcement is provided near the earth side
B)In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab
C)In the heel slab of a retaining wall, reinforcement is provided at the top of the slab
D)None of these

Answer 2

None of these

Question 3

The transverse reinforcements provided at right angles to the main reinforcement

A)Distribute the load
B)Resist the temperature stresses
C)Resist the shrinkage stress
D)All the above

Answer 3

All the above

Question 4

The pitch of the main bars in a simply supported slab, should not exceed its effective depth by

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

Question 5

High strength concrete is used in pre-stressed member

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

Question 6

Enlarged head of a supporting column of a flat slab is technically known as

A)Supporting end of the column
B)Top of the column
C)Capital
D)Drop panel

Question 7

Thickened part of a flat slab over its supporting column, is technically known as

A)Drop panel
B)Capital
C)Column head
D)None of these

Question 8

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

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

Question 9

The minimum head room over a stair must be

A)200 cm
B)205 cm
C)210 cm
D)230 cm

Question 10

The Young's modulus of elasticity of steel, is

A)150 KN/mm²
B)200 KN/mm²
C)250 KN/mm²
D)275 KN/mm²

Question 11

Spacing of stirrups in a rectangular beam, is

A)Kept constant throughout the length
B)Decreased towards the centre of the beam
C)Increased at the ends
D)Increased at the centre of the beam

Question 12

As per IS : 456, the reinforcement in a column should not be less than

A)0.5% and not more than 5% of cross
B)0.6% and not more than 6% of cross
C)0.7% and not more than 7% of cross
D)0.8% and not more than 8% of cross

Question 13

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

A)1400 kg/cm²
B)190 kg/cm²
C)260 kg/cm²
D)230 kg/cm²

Question 14

Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

A)42 diameters from the centre of the column
B)42 diameters from the inner edge of the column
C)42 diameters from the outer edge of the column
D)24 diameters from the centre of the column

Question 15

The advantage of reinforced concrete, is due to

A)Monolithic character
B)Fire-resisting and durability
C)Economy because of less maintenance cost
D)All the above

Question 16

The thickness of the topping of a ribbed slab, varies between

A)3 cm to 5 cm
B)5 cm to 8 cm
C)8 cm to 10 cm
D)12 cm to 15 cm

Question 17

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 18

If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

A)Straight below centroidal axis
B)Parabolic with convexity downward
C)Parabolic with convexity upward
D)Straight above centroidal axis

Question 19

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 20

If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is

A)200 cm
B)300 cm
C)150 cm
D)100 cm

Question 21

The steel generally used in R.C.C. work, is

A)Stainless
B)Mild steel
C)High carbon steel
D)High tensionsteel

Question 22

A part of the slab may be considered as the flange of the T-beam if

A)Flange has adequate reinforcement transverse to beam
B)It is built integrally with the beam
C)It is effectively bonded together with the beam
D)All the above

Question 23

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

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

Question 24

According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than

A)5 cm
B)10 cm
C)15 cm
D)20 cm

Question 25

The live load to be considered for an accessible roof, is

A)Nil
B)75 kg/m³
C)150 kg/m²
D)200 kg/cm²