Question

1 In Oxygen-Sag Curve, at the critical point, the rate of reaeration becomes ________ the rate of Deoxygenation

Select one:

Double

Equal to

Half

2. In general, adsorption of a gas on solid surface is_________process

Select one:

Endothermic

Exothermic

None

3. Which of the following tests can be performed in relatively shorter period of time?

Select one:

TOC

BOD

COD

All require same time

4. In Claus process, H₂S is converted to____________

Select one:

SO₃

disulphide

Elemental Sulphur

5. Which of the following Samples provide more meaningful data when the composition of waste varies with either time or flow?

Select one:

a.Grab

b.Composite

Both 'a' and 'b'

None

Answer 1