BCE Environmental Engineering

Question 1

What does BOD stand for in water quality assessment?

Accepted Answer

Biochemical Oxygen Demand

Answer

Biological Oxygen Demand

Answer

Basic Organic Degradation

Answer

Bacterial Oxidation Dynamics

Question 2

Which unit process in a conventional water treatment plant removes suspended solids by settling?

Accepted Answer

Sedimentation

Answer

Coagulation

Answer

Filtration

Answer

Disinfection

Question 3

The primary purpose of chlorination in drinking water treatment is:

Accepted Answer

To disinfect and kill pathogens

Answer

To remove hardness

Answer

To reduce turbidity

Answer

To remove dissolved iron

Question 4

What is the main objective of primary wastewater treatment?

Accepted Answer

Physical removal of settleable solids and floating material

Answer

Biological removal of dissolved nutrients

Answer

Disinfection of effluent

Answer

Chemical precipitation of heavy metals

Question 5

Which parameter measures the acid-neutralizing capacity of a water body?

Accepted Answer

Alkalinity

Answer

pH

Answer

Hardness

Answer

Turbidity

Question 6

Eutrophication of water bodies is primarily caused by excess concentrations of which nutrients?

Accepted Answer

Nitrogen and phosphorus

Answer

Iron and manganese

Answer

Calcium and magnesium

Answer

Chloride and sulfate