CEH Chemical Handling and Safety 2 — Questions and Answers
Question 1: What does the term 'pH' indicate on a cleaning product label?
- The product's viscosity
- The acidity or alkalinity of the solution (Correct answer)
- The percentage of active ingredients
- The product's flash point temperature
Correct answer: The acidity or alkalinity of the solution
pH indicates whether a chemical is acidic (below 7), neutral (7), or alkaline (above 7), which affects its cleaning action and safety requirements.
Question 2: Which personal protective equipment (PPE) is MOST important when mixing concentrated cleaning chemicals?
- Steel-toed boots
- Chemical-resistant gloves and eye protection (Correct answer)
- A dust mask and apron
- Heat-resistant gloves only
Correct answer: Chemical-resistant gloves and eye protection
Chemical-resistant gloves and eye protection are essential when mixing concentrates to prevent skin burns and eye damage from splashes.
Question 3: A housekeeper notices a chemical container is leaking. What is the FIRST action to take?
- Continue using the product until empty
- Move the container to a well-ventilated area and notify the supervisor (Correct answer)
- Dispose of the container immediately in the trash
- Transfer the chemical to a different unlabeled container
Correct answer: Move the container to a well-ventilated area and notify the supervisor
Moving the leaking container to a ventilated area and notifying a supervisor ensures safety and proper handling per hazardous material protocols.
Question 4: What is the primary hazard of mixing bleach with ammonia-based cleaners?
- The mixture becomes ineffective
- It produces toxic chloramine gases (Correct answer)
- It creates an explosive reaction
- It raises the pH to dangerous levels
Correct answer: It produces toxic chloramine gases
Bleach and ammonia react to form chloramine vapors, which can cause respiratory distress, chest pain, and in high concentrations, be life-threatening.
Question 5: How should chemical dilution ratios be interpreted on a product label showing '1:32'?
- 1 part chemical to 32 parts total solution
- 1 ounce of chemical per 32 square feet
- 1 part chemical to 32 parts water (Correct answer)
- 32 milliliters per gallon of water
Correct answer: 1 part chemical to 32 parts water
A 1:32 dilution ratio means one part concentrate is mixed with 32 parts water to create the ready-to-use solution.
Question 6: Which section of a Safety Data Sheet (SDS) contains first aid measures for chemical exposure?
- Section 2 – Hazard Identification
- Section 4 – First Aid Measures (Correct answer)
- Section 7 – Handling and Storage
- Section 11 – Toxicological Information
Correct answer: Section 4 – First Aid Measures
Section 4 of the SDS specifically outlines first aid procedures for inhalation, skin contact, eye contact, and ingestion of the chemical.
Question 7: What does a NFPA 704 diamond with a red quadrant number of '4' indicate?
- The material is non-flammable
- The material will ignite at normal temperatures (Correct answer)
- The material requires special handling only at high heat
- The material has a flash point above 200°F
Correct answer: The material will ignite at normal temperatures
A red quadrant rating of 4 on the NFPA 704 diamond means the material has a very low flash point and will burn readily at normal ambient temperatures.
CEH Chemical Handling and Safety 2
What does the term 'pH' indicate on a cleaning product label?