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Q.1
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
25
30
35
40
Q.2
For a number of columns constructed in a rcjw, the type of foundation provided, is
Footing
Raft
Strap
Strip
Q.3
With usual notations the depth of the neutral axis of a balanced section, is given by
mc/t = (d - n)/n
t/mc = (d - n)/n
t/mc = (d + n)/n
mc/t = n/(d - n)
Q.4
By over-reinforcing a beam, the moment of resistance can be increased not more than
10 %
15 %
20 %
25 %
Q.5
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
10 mm
15 mm
20 mm
25 mm
Q.6
A very comfortable type of stairs is
Straight
Dog legged
Geometrical
Open newel
Q.7
If diameter of a reinforcement bar is d, the anchorage value of the hook is
4d
8d
12d
16d
Q.8
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
WL/2
WL/4
WL/6
WL/8
Q.9
If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a
Simply supported beam
Continuous beam
Cantilever beam
None of these
Q.10
A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm² and 300 kg/cm², the Safe load on the column, should not exceed
4,120 kg
41,200 kg
412,000 kg
None of these
Q.11
A flat slab is supported
On beams
On columns
On beams and columns
On columns monolithically built with slab
Q.12
A foundation rests on
Base of the foundation
Sub-grade
Foundation soil
Both B and C
Q.13
The effective span of a simply supported slab, is
Distance between the centers of the bearings
Clear distance between the inner faces of the walls plus twice the thickness of the wall
Clear span plus effective depth of the slab
None of these
Q.14
The effective width of a column strip of a flat slab, is
One-fourth the width of the panel
Half the width of the panel
Radius of the column
Diameter of the column
Q.15
If S
b
, is the average bond stress on a bar of diameter ‘d’ subjected to maximum stress ‘t’, the length of the embedment ‘l’ is given by
l = dt/S
b
l = dt/2S
b
l = dt/3S
b
l = dt/4S
b
Q.16
The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
0.7
0.8
0.9
0.6
Q.17
An R.C.C. column is treated as short column if its slenderness ratio is less than
30
35
40
50
Q.18
A ribbed slab is provided for
A plain ceiling
Thermal insulation
Acoustic insulation
All the above
Q.19
If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:
(1 - C) mf - eE
(C - 1) mf + eE
(C - 1) mf - eE
(1 - C) mf + eE
Q.20
The percentage of minimum reinforcement of the gross sectional area in slabs, is
0.10 %
0.12 %
0.15 %
0.18 %
Q.21
The thickness of the topping of a ribbed slab, varies between
3 cm to 5 cm
5 cm to 8 cm
8 cm to 10 cm
12 cm to 15 cm
Q.22
The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than
4 mm
5 mm
6 mm
7 mm
Q.23
If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width
R + T
T - R
√(R² + T²)
R - T
Q.24
If ‘W’ is the uniformly distributed load on a circular slab of radius ‘R’ fixed at its ends, the maximum positive radial moment at its centre, is
3WR²/16
2WR²/16
WR²/16
None of these
Q.25
The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is
51.5
52.5
53.5
54.5
Q.26
If p₁ and p₂ are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle θ° to the principal plane carrying the principal stress p₁, is:
[(p₁ - p₂)/2] + [(p₁ + p₂)/2] sin 2θ
[(p₁ - p₂)/2] + [(p₁ + p₂)/2] cos 2θ
[(p₁ + p₂)/2] + [(p₁ - p₂)/2] cos 2θ
[(p₁ + p₂)/2] + [(p₁ - p₂)/2] sin 2θ
Q.27
The advantage of a concrete pile over a timber pile, is
No decay due to termites
No restriction on length
Higher bearing capacity
All the above
Q.28
An R.C.C. roof slab is designed as a two way slab if
It supports live loads in both directions
The ratio of spans in two directions is less than 2
The slab is continuous over two supports
The slab is discontinuous at edges
Q.29
The width of the rib of a T-beam, is generally kept between
1/7 to 1/3 of rib depth
1/3 to 1/2 of rib depth
1/2 to 3/4 of rib depth
1/3 to 2/3 of rib depth
Q.30
If ‘H’ is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is
0.3 H
0.4 H
0.5 H
0.7 H
0 h : 0 m : 1 s
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