Engineering Questions with Answers - Multiple Choice Questions

# Environmental Engineering MCQ – Construction of Imhoff Tank

1 - Question

Which of the following is represented by C in the following figure? Figure: Imhoff tank
a) Outlet
b) Digestion chamber
c) Gas chamber
d) Sedimentation chamber

Explanation: C represents the digested chamber. It is placed in the lower section of Imhoff tank.

2 - Question

In which of the following, the settling of solids takes place in the following figure? Figure: Imhoff tank
a) Outlet
b) Digestion chamber
c) Gas chamber
d) Sedimentation chamber

Explanation: The settling of solids takes place at the sedimentation chamber. It is represented by D in the above figure.

3 - Question

The maximum flow through the period at D in the following figure? Figure: Imhoff tank
a) 0.3m/min
b) 0.4m/min
c) 0.8m/min
d) 0.9m/min

Explanation: The maximum flow through the period at D is 0.3m/min and its design depth should be between 3 to 3.5 m.

4 - Question

The sludge is digested in which of the following? Figure: Imhoff tank
a) Outlet
b) Sedimentation chamber
c) Gas chamber
d) Digestion chamber

Explanation: The sludge is digested in the digestion chamber. Its minimum design capacity is 57 liters per person.

5 - Question

The gas chamber in the below figure is represented by _____________ Figure: Imhoff tank
a) A
b) E
c) B
d) C

Explanation: The gas chamber is represented by the E in the figure. It is located at the sides of the Imhoff tank.

6 - Question

The sewage comes in the Imhoff tank through which of the following? Figure: Imhoff tank
a) A
b) B
c) C
d) D

Explanation: A represents the inlet through which the sewage enters the Imhoff tank.

7 - Question

The detention period of the sedimentation chamber of an Imhoff tank is? Figure: Imhoff tank
a) 30 seconds
b) 30 minute
c) 1 hour
d) 2 hours

Explanation: The detention period of the sedimentation chamber of an Imhoff tank is 2 hours. It is represented by D as shown in the figure.

8 - Question

B in the following figure is represented by ____________ Figure: Imhoff tank
a) Outlet
b) Sedimentation chamber
c) Gas chamber
d) Digestion chamber

Explanation: B represents the outlet of Imhoff tank. It carries the partially treated sewage.

9 - Question

Which of the following is called a scum chamber in the following figure? Figure: Imhoff tank
a) Settling chamber
b) Sedimentation chamber
c) Gas chamber
d) Digestion chamber