The depth of concrete bed of the foundation depends upon

If a is the offset of concrete bed in cms, and d is the depth of concrete bed in cms, then

A

d = 0.445 a

B

d = 0.557 a

C

d = 0.775 a

D

None of these

A swimming pool is initially filled to a depth of 96 inches. After 2 weeks, the depth has decreased to9212 inches. Assuming that the depth decreased at a constant rate, after how many days would the water depth have reached 9334 inches?

A

3

B

9

C

7

D

6

According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is

A

1.25 D

B

1.50 D

C

1.75 D

D

2.00 D

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

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

A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12m. How many times larger is the new flower bed?

A

9

B

3

C

32

D

8

Depth of lean concrete bed placed at the bottom of a wall footing, is kept

A

10 cm

B

15 cm

C

Equal to its projection beyond wall base

D

Less than its projection beyond wall base

Allowable bearing pressure for a foundation depends upon

A

allowable settlement only

B

ultimate bearing capacity of soil only

C

both allowable settlement and ultimate bearing capacity

D

none of above

The uniformity of a gas fluidised bed depends upon the __________ of the solid particles.

A

Size

B

Surface properties

C

Both A and B

D

Neither A nor B

In a doubly-reinforced beam if ‘c’ and ‘t’ are stresses in concrete and tension reinforcement, ‘d’ is the effective depth and ‘n’ is depth of critical neutral axis, the following relationship holds good

A

$$\frac{{{\text{mc}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$

B

$$\frac{{{\text{m}} + {\text{c}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} + {\text{n}}}}$$

C

$$\frac{{{\text{t}} + {\text{c}}}}{{\text{m}}} = \frac{{{\text{d}} + {\text{n}}}}{{\text{n}}}$$

D

$$\frac{{\text{m}}}{{{\text{t}} + {\text{c}}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$

For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is

A

1

B

2

C

3

D

4

The depth of concrete bed of the foundation depends upon

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