Corrosives and Oxidizers Exam Practice

FDNY C42 Storage and Handling of Corrosives and Oxidizers Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is considered a common corrosive chemical in

a fire department setting?

• Sodium chloride
• Sulfuric acid
• Methane
• Helium

Answer: B) Sulfuric acid

Rationale: Sulfuric acid is a highly corrosive chemical that can cause

severe burns and damage to metals, making it a key focus in corrosive chemical handling. 1 / 4

• What is the primary hazard associated with oxidizers?
• Flammability
• Radioactivity
• Enhancing combustion
• Toxic fumes

Answer: C) Enhancing combustion

Rationale: Oxidizers themselves may not be flammable, but they

release oxygen or other oxidizing agents that can cause or intensify fires.

• The NFPA 704 diamond uses which color to represent oxidizers?
• Red
• Blue
• Yellow
• White

Answer: C) Yellow

Rationale: In NFPA 704, yellow indicates the chemical’s reactivity or

oxidizing potential.

• Which type of container is most suitable for storing concentrated

sulfuric acid?

• Plastic
• Glass or acid-resistant plastic
• Aluminum
• Copper 2 / 4

Answer: B) Glass or acid-resistant plastic

Rationale: Sulfuric acid is highly reactive with many metals and some

plastics; acid-resistant materials prevent leaks and reactions.

• What is the recommended method for neutralizing a small spill of a

strong acid?

• Add water only
• Add an oxidizer
• Use a weak base such as sodium bicarbonate
• Cover with paper towels

Answer: C) Use a weak base such as sodium bicarbonate

Rationale: Neutralization converts the acid into a less harmful

substance; using a weak base is safe for small spills.

• Which personal protective equipment (PPE) is essential when handling

concentrated nitric acid?

• Cotton gloves
• Chemical-resistant gloves and goggles
• Standard uniform
• Ear protection

Answer: B) Chemical-resistant gloves and goggles

Rationale: Nitric acid is highly corrosive and can cause burns; proper

PPE prevents skin and eye injuries.

7. When storing oxidizers, they should be kept:

• Near flammable liquids 3 / 4

• In direct sunlight
• Away from combustibles and reducing agents
• On the floor

Answer: C) Away from combustibles and reducing agents

Rationale: Oxidizers can react violently with combustible materials

and reducing agents, creating fire hazards.

• Which of the following is a Class 8 hazardous material under DOT

regulations?

• Gasoline
• Corrosive substances
• Explosives
• Radioactive material

Answer: B) Corrosive substances

Rationale: Class 8 materials include corrosive substances that can

destroy human tissue or materials.

9. A red NFPA diamond indicates:

• Reactivity
• Flammability
• Health hazard
• Special hazard

Answer: B) Flammability

Rationale: Red in the NFPA diamond represents the flammability

rating of a chemical.

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