The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended

The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended ________

A

100 mm

B

150 mm

C

210 mm

D

400 mm

The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended to __________

A

100 mm

B

150 mm

C

210 mm

D

400 mm

The velocity of a fluid in a pipe of diameter D is V. The pipe is connected to another pipe of diameter 2D. Reynolds number in the pipe of diameter D in relation to the pipe of diameter 2D is

A

Double

B

Four times

C

Half

D

Same

What is the diameter of a domestic sewer pipe laid at gradient 1 in 100?

A

150 mm

B

250 mm

C

120 mm

D

80 mm

Two pipes A and B can fill an empty cistern in 18 and 27 hours, respectively. Pipe C can drain the entire cistern in 45 hours when no other pipe is in operation. Initially, when the cistern was empty Pipe A and Pipe C were turned on. After a few Pipe A was turned off and Pipe B was turned on instantly. In all, it took 55 hours to fill the cistern. For how many hours was Pipe B turned on?

A

50

B

45

C

27

D

30

A tank has an inlet and outlet pipe. The inlet pipe fills the tank completely in 2 hours when the outlet pipe is plugged. The outlet pipe empties the tank completely in 6 hours when the inlet pipe is pluggeed. If there is a lekage also which is capable of draining out the liquid from the tank at half of the rate of outet pipe,them what is the time taken to fill the emty tank when both the pipes are opened?

A

3 hours

B

4 hours

C

5 hours

D

None of these

A circular pipe of radius 7 cm is used for water flow transmission. This pipe is moulded into another pipe with a square cross-section keeping the length same. (Ignore the thickness of the pipe). Calculate the hydraulic diameter of the moulded pipe. (Take π = 22/7).

A

11 cm

B

7 cm

C

3.5 cm

D

22 cm

A compound pipe of diameter d₁, d₂ and d₃ having lengths $${l_1},\,{l_2}$$ and $${l_3}$$ is to be replaced by an equivalent pipe of uniform diameter d and of the same length $$l$$ as that of the compound pipe. The size of the equivalent pipe is given by

A

$$\frac{l}{{{{\text{d}}^2}}} = \frac{{{l_1}}}{{{\text{d}}_1^2}} + \frac{{{l_2}}}{{{\text{d}}_2^2}} + \frac{{{l_3}}}{{{\text{d}}_3^2}}$$

B

$$\frac{l}{{{{\text{d}}^3}}} = \frac{{{l_1}}}{{{\text{d}}_1^3}} + \frac{{{l_2}}}{{{\text{d}}_2^3}} + \frac{{{l_3}}}{{{\text{d}}_3^3}}$$

C

$$\frac{l}{{{{\text{d}}^4}}} = \frac{{{l_1}}}{{{\text{d}}_1^4}} + \frac{{{l_2}}}{{{\text{d}}_2^4}} + \frac{{{l_3}}}{{{\text{d}}_3^4}}$$

D

$$\frac{l}{{{{\text{d}}^5}}} = \frac{{{l_1}}}{{{\text{d}}_1^5}} + \frac{{{l_2}}}{{{\text{d}}_2^5}} + \frac{{{l_3}}}{{{\text{d}}_3^5}}$$

A circular sewer having 0.4m diameter is flowing with velocity 2m/Sec. If the gradient of sewer is 1 in 90. Find the value of Chezy’s coefficient?

A

10

B

30

C

60

D

40

A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:

A

6 hours

B

10 hours

C

15 hours

D

30 hours

The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended

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