OIT Chemical Handling and Storage 2

Question 1

Alum (aluminum sulfate) is commonly added during water treatment primarily for what purpose?

Accepted Answer

Coagulation and flocculation of suspended particles

Answer

Alum acts as a coagulant, causing fine suspended particles to clump together into larger floc that can be removed by sedimentation or filtration.

Question 2

Polymer chemicals used in water treatment should be stored to avoid which of the following conditions?

Accepted Answer

Freezing temperatures and direct sunlight

Answer

Polymers can degrade or freeze if exposed to very low temperatures, and UV light from direct sunlight can break down their molecular structure.

Question 3

When a chemical delivery is received at the treatment plant, what should the operator verify FIRST?

Accepted Answer

The chemical matches the purchase order, container labels, and SDS

Answer

Verifying that the delivered chemical matches the purchase order and labeling ensures the correct chemical is received and prevents dangerous mix-ups.

Question 4

Calcium hypochlorite (HTH) stored at a water treatment facility presents which primary hazard?

Accepted Answer

It is an oxidizer that can ignite organic materials and some metals

Answer

Calcium hypochlorite is a strong oxidizing agent that can react violently with organic materials, fuels, and some metals, creating a fire or explosion risk.

Question 5

What does a GHS diamond-shaped pictogram with a flame symbol on a chemical label indicate?

Accepted Answer

The chemical is flammable or an oxidizer

Answer

Under the Globally Harmonized System (GHS), a flame pictogram indicates the substance is flammable, self-reactive, self-heating, or an oxidizer.

(OIT) Operator in Training Practice Test

(OIT) Operator in Training Practice Test

OIT Chemical Handling and Storage 2