Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of

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

A

0.3 H

B

0.4 H

C

0.5 H

D

0.7 H

Total pressure on the vertical face of a retaining wall of height ‘h’ per unit run exerted by the retained earth weighing ‘w’ per unit volume, is

A

$${\text{wh}}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

B

$${\text{w}}{{\text{h}}^2}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

C

$$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{2\left( {1 + \sin \varphi } \right)}}$$

D

$$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{3\left( {1 + \sin \varphi } \right)}}$$

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall acts at a distance __________ from the liquid surface.

A

$$\frac{{\text{H}}}{3}$$

B

$$\frac{{\text{H}}}{2}$$

C

$$\frac{{2{\text{H}}}}{3}$$

D

$$\frac{{3{\text{H}}}}{4}$$

If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

A

$${\text{h}} = \frac{{\text{W}}}{{{\text{Aw}}}}\left$$

B

$${\text{h}} = \frac{{\text{W}}}{{{\text{Aw}}}}\left$$

C

$${\text{h}} = \frac{{\text{W}}}{{{\text{Aw}}}}{\left^2}$$

D

$${\text{h}} = \sqrt {\frac{{\text{W}}}{{{\text{Aw}}}}} {\left^2}$$

To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

A

$$\frac{{\text{b}}}{3}$$

B

$$\frac{{\text{b}}}{4}$$

C

$$\frac{{\text{b}}}{5}$$

D

$$\frac{{\text{b}}}{6}$$

A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?

A

6.2 m

B

6.5 m

C

6.8 m

D

\7.5 m

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

A

Nine times

B

Six times

C

Four times

D

Two times

If ‘H’ is the height of wall between centers of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be

A

0.75 H

B

0.85 H

C

1.0 H

D

1.5 H

The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is

A

Not needed

B

Provided equally on inner and front faces

C

Provided more on inner face than on front face

D

Provided more on front face than on inner face

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

A

One half of the width of the stem at the bottom

B

One third of the width of the stem at the bottom

C

One fourth of the width of the steam at the bottom

D

Width of the stem at the bottom

Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of

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