OIT Chemical Handling and Storage

Question 1

What document must be available to workers for every hazardous chemical used at a water treatment facility?

Accepted Answer

Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS)

Answer

Chemical purchase invoice

Answer

Operator license certificate

Answer

State permit application

Question 2

Chlorine gas cylinders stored in a treatment facility should be kept at a temperature below what level to prevent excessive pressure buildup?

Accepted Answer

100°F (38°C)

Answer

130°F (54°C)

Answer

70°F (21°C)

Answer

50°F (10°C)

Question 3

When mixing chemicals at a water treatment plant, which of the following is the correct and safe practice?

Accepted Answer

Add acid to water to dissipate heat safely

Answer

Add water to acid to reduce splashing

Answer

Mix chemicals together then add water

Answer

Heat the solution first then add chemicals

Question 4

Which type of Personal Protective Equipment (PPE) is required when handling concentrated sodium hypochlorite solution?

Accepted Answer

Chemical-resistant gloves, face shield, and apron

Answer

Leather gloves and safety glasses only

Answer

Standard cotton gloves and goggles

Answer

Hard hat and steel-toed boots only

Question 5

How should incompatible chemicals such as chlorine and ammonia be stored at a treatment facility?

Accepted Answer

In separate, well-ventilated storage areas with secondary containment

Answer

In the same room with a ventilation fan running

Answer

In the same secondary containment bin to save space

Answer

Together if the total quantity is under 50 pounds

Question 6

Secondary containment for chemical storage at water treatment facilities is designed to hold at least what percentage of the largest container's volume?

Accepted Answer

100%

Answer

50%

Answer

75%

Answer

125%

Question 7

What is the first action an operator should take upon discovering a chlorine gas leak in the chemical feed room?

Accepted Answer

Evacuate the area and alert others while avoiding breathing the gas

Answer

Attempt to tighten the leaking valve immediately

Answer

Open all windows to dilute the gas concentration

Answer

Pour water over the cylinder to neutralize the leak