BE/B Eng Bachelor of Engineering Environmental Engineering 1

Question 1

What is Biochemical Oxygen Demand (BOD) a measure of?

Accepted Answer

The amount of oxygen microorganisms need to decompose organic matter in water

Answer

BOD measures the quantity of oxygen consumed by biological processes breaking down organic material in water at a given temperature over a set time period (typically 5 days at 20°C).

Question 2

Which water treatment process removes suspended solids by allowing them to settle under gravity?

Accepted Answer

Sedimentation

Answer

Sedimentation (clarification) allows suspended particles to settle to the bottom of a basin under gravitational force, removing them from the water.

Question 3

What is the primary greenhouse gas produced by human activities contributing to climate change?

Accepted Answer

Carbon dioxide (CO₂)

Answer

CO₂ from fossil fuel combustion, deforestation, and industrial processes is the dominant anthropogenic greenhouse gas driving global warming.

Question 4

In air pollution control, what does a baghouse filter remove from industrial exhaust?

Accepted Answer

Particulate matter (dust and fine particles)

Answer

A baghouse uses fabric filter bags to capture particulate matter from industrial exhaust gas streams, achieving high collection efficiencies for fine particles.

Question 5

What is the purpose of a landfill liner in solid waste management?

Accepted Answer

To prevent leachate from contaminating underlying soil and groundwater

Answer

Landfill liners (typically HDPE geomembrane and compacted clay) create an impermeable barrier that prevents toxic leachate from migrating into groundwater.

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Practice Test

BE/B Eng Bachelor of Engineering Environmental Engineering 1