Labs Practice Exam Questions And Correct

FDNY Division 14: Supervise the Handling

and Use of Chemicals in NYC K–12 School Labs Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is the most important reason for labeling all

chemicals in a school lab?

• To make the lab look organized
• To comply with city zoning laws
• To identify the chemical and its hazards
• To track inventory
• To identify the chemical and its hazards

Rationale: Proper labeling ensures that all personnel can quickly recognize

substances and understand their risks, which is critical for safety.

• When should a chemical safety data sheet (SDS) be consulted?
• Only when a chemical spills 1 / 4

• Before using any chemical
• After a chemical reaction occurs
• Only for flammable liquids
• Before using any chemical

Rationale: SDS provide essential information on hazards, handling, and

emergency procedures. Reviewing them before use ensures proper precautions are taken.

• What is the primary function of a fume hood in a school laboratory?
• To store chemicals safely
• To ventilate harmful fumes away from the user
• To cool down chemicals
• To mix chemicals automatically
• To ventilate harmful fumes away from the user

Rationale: Fume hoods protect students and staff by drawing vapors,

gases, and dust away from the breathing zone.

• Which type of chemical should never be stored above eye level?
• Solid salts
• Liquids in glass bottles
• Flammable liquids
• Aqueous solutions
• Liquids in glass bottles

Rationale: Storing liquids in glass containers above eye level increases the

risk of spills and serious eye injuries. 2 / 4

• What is the correct procedure if a student’s clothing catches fire?
• Run to the sink
• Stop, drop, and roll
• Shake the student vigorously
• Remove all clothing immediately
• Stop, drop, and roll

Rationale: This method extinguishes flames safely and reduces burn

injuries.

• Which of the following is considered a corrosive chemical?
• Hydrochloric acid
• Sodium chloride
• Ethanol
• Water
• Hydrochloric acid

Rationale: Corrosives can damage skin, eyes, and other materials.

Hydrochloric acid is highly corrosive and must be handled with PPE.

• Which fire extinguisher is appropriate for a chemical fire involving

flammable liquids in a school lab?

• Water (Class A)
• CO₂ (Class B)
• Wet chemical (Class K)
• Foam (Class A)
• CO₂ (Class B) 3 / 4

Rationale: CO₂ extinguishers displace oxygen and are suitable for

flammable liquid fires, minimizing chemical reactions with water.

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

strong acids?

• Gloves and safety goggles
• Lab coat and sandals
• Respirator only
• No PPE required
• Gloves and safety goggles

Rationale: Strong acids can cause severe burns. Gloves, goggles, and lab

coats are essential for protection.

• How should nitric acid be stored in a school laboratory?
• With flammable solvents
• In a cool, ventilated, and acid-specific cabinet
• Near bases for neutralization
• On a high shelf
• In a cool, ventilated, and acid-specific cabinet

Rationale: Nitric acid is a strong oxidizer and must be segregated from

incompatible chemicals to prevent reactions.

• What is the best way to dilute concentrated acids safely?
• Add water to acid
• Add acid to water slowly
• Mix equal parts rapidly
• / 4