## 51. The advantage of a concrete pile over a timber pile, is

## 52. An R.C.C. roof slab is designed as a two way slab if

## 53. The amount of reinforcement for main bars in a slab, is based upon

## 54. The transverse reinforcements provided at right angles to the main reinforcement

## 55. If ‘W’ is weight of a retaining wall and ‘P’ is the horizontal earth pressure, the factor of safety against sliding, is

## 56. If p_{1} and p_{2} are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle $${\theta ^ \circ }$$ to the principal plane carrying the principal stress p_{1}, is:

_{1}and p

_{2}are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle $${\theta ^ \circ }$$ to the principal plane carrying the principal stress p

_{1}, is:

## 57. The width of the rib of a T-beam, is generally kept between

## 58. If ‘H’ is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is

## 59. The thickness of base slab of a retaining wall generally provided, is

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

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