Examination Questions And Correct Answers

FDNY C-20 Supervision of Storage, Handling, and Use of Cellulose Nitrate Film Practice Examination Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

1. Cellulose nitrate film is classified by the FDNY primarily because it is:

• Water-activated
• Self-extinguishing
• Slow-burning
• Highly flammable

Because cellulose nitrate ignites easily, burns rapidly, and produces its own oxygen during decomposition.

2. The C-20 certificate holder is responsible for:

• Building structural inspections
• Tenant fire drills
• Supervision of storage, handling, and use of cellulose nitrate film 1 / 4

• HVAC shutdown

The C-20 certification specifically governs cellulose nitrate film operations.

3. Cellulose nitrate film must be stored in rooms constructed with:

• Plastic partitions
• Combustible drywall
• Fire-resistive construction
• Temporary panels

Fire-resistive construction reduces the spread of fire from these high- hazard materials.

4. Storage rooms for cellulose nitrate film must be:

• Kept locked at all times
• Open for ventilation
• Used for multiple hazardous materials
• Used exclusively for cellulose nitrate film

Mixing hazards increases fire load and complicates emergency response.

5. Cellulose nitrate film is most dangerous when:

• Wet
• Deteriorated
• Frozen
• Recently manufactured

Deterioration accelerates decomposition and increases spontaneous ignition risk. 2 / 4

6. Film storage temperatures must be:

• Uncontrolled
• Above 120°F
• Kept cool and stable
• Cycled daily

Heat accelerates decomposition and can trigger auto-ignition.

7. Ventilation for cellulose nitrate film rooms must be:

• None
• Open to other rooms
• Recirculated
• Adequate and mechanically independent

Independent ventilation prevents contamination and reduces buildup of vapors.

8. Cellulose nitrate film cabinets must be:

• Wood
• Aluminum
• Listed, labeled, and noncombustible
• Open racks

Noncombustible cabinets reduce rapid flame spread.

• The required portable fire extinguishers for cellulose nitrate storage

areas are: 3 / 4

• Water only
• CO₂ only
• Approved extinguishers suitable for combustible solids
• None

Class A or multipurpose extinguishers address burning film and associated materials.

10. A sign identifying the hazard of cellulose nitrate film storage must be:

• Optional
• Placed only outdoors
• Written in pencil
• Posted conspicuously

Clear labeling assists emergency personnel and staff in hazard recognition.

11. C-20 supervision requires the certificate holder to be:

• Off-site
• On-site or readily available
• Only present during inspections
• Not required during film handling

Active supervision is required whenever cellulose nitrate film is handled or used.

12. When handling cellulose nitrate film, personnel must:

• Smoke nearby
• Use open flames cautiously
• / 4