Environmental Engineering Mock Test 7

10%

Question 1 of 10

1. The expression of relative stability at 20^oC is given by ___________

S = 1-(0.794)^T20

S = 100 (0.794)^T20

S = 100 (1-(0.794)^T20)

S = (1-(0.794)^T20)

Question 1 of 10

Question 2 of 10

2. Which of the following represents the oxygen sag curve in the following figure?

Figure: Oxygen sag curve

Dotted blue line

Green curve

Red curve

Yellow curve

Question 2 of 10

Question 3 of 10

3. The full form of BOD is __________

Bandwidth on demand

Biodegradable oxygen demand

Biochemical oxygen demand

Biological oxygen demand

Question 3 of 10

Question 4 of 10

4. In a rectangular horizontal flow tank, the maximum permissible velocity is ____ m/Sec.

0.3

0.003

0.03

Question 4 of 10

Question 5 of 10

5. The average time required by water to pass through the settling tank is called _______

Detention time

Flowing through period

Time of flow

Mean time

Question 5 of 10

Question 6 of 10

6. The uppermost zone in lakes is called as ____________

Benthic zone

Climate zone

Euphotic zone

Littoral zone

Question 6 of 10

Question 7 of 10

7. In which unit operation, gases are released or absorbed in the effluent?

Ion transfer

Solids Transfer

Gas transfer

Solute stabilization

Question 7 of 10

Question 8 of 10

8. In which type of sedimentation, the flocculent suspension of high concentration takes place?

Type III sedimentation

Type I sedimentation

Type IV sedimentation

Type II sedimentation

Question 8 of 10

Question 9 of 10

9. Which form of solute stabilization occurs when effluent passes through limestone?

Re-carbonation

Chlorination

Liming

Super-chlorination

Question 9 of 10

Question 10 of 10

10. The dimension formula of kinematic viscosity is ____________

ML^-1T^-1

L^-1T

ML^-2T^-2

L²T^-1

Question 10 of 10