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

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

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

Weight of C is twice the weight of M. Weight of M is 1/9 of the weight of R. Weight of R is 5/2 of the weight of K. Weight of K is 1/3 of the weight of G. Who is the second lightest?

A

C

B

M

C

K

D

G

A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

A

Remain horizontal

B

Slant up towards direction of pull

C

Slant down towards direction of pull

D

None of the above

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

Jony weighs twice as much as Suzan's. Suzan's weight is 60% of Sami's weight. Manik's weight is 50% of Lynda's weight. Lynda weight 190% of Jony's weight. Which of these 5 people weight the least?

A

Suzan

B

Manik

C

Lynda

D

Sami

Alam weighs twice as much as much as Marina. Marina's weight is 60% of Robin's weight. Drabir weight 50% of Lima's weight. Lima weight 190% of Alam's weight. Which of these 5 people weight the least?

A

Robin

B

Lima

C

Drabir

D

Marina

10 g-এর একটি ভর ঘর্ষণহীন একটি অনুভূমিক তলের ওপর দিয়ে গিয়ে দেয়ালের সাথে সংযুক্ত একটি অনুভূমিক স্প্রিংকে 6 m/s বেগে আঘাত করে। যদি স্প্রিংটির স্প্রিং ধ্রুবকের মান 400 N/m হয় তাহলে এটিতে সর্বোচ্চ সংকোচন কত হবে? (A mass of 10 g sliding on a frictionless horizontal surface hits at 6 m/s on a horizontal spring attached to a wall. If the spring has a spring constant of 400 N/m, what is its maximum compression?)

A

0.3 cm

B

3 /√10cm

C

3 cm

D

0.9 cm

For the design of retaining walls, the minimum factor of safety against overturning is taken as

A

1.5

B

2.0

C

2.5

D

3.0

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

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

Related Questions