FDNY C-14 EXAM QUESTIONS WITH
100% CORRECT ANSWERS LATEST
VERSION 2025/2026.
Basement - ANS story partly below grade plane; 1/2 clear height
boiling point - ANS temp when liq vap pressure = 14.7 ATP/760 mmhg; unknown BP - 20%
evap point of distillation performed related to ASTM D 86
chemical - ANS element/compound/mixture of both
chemical name - ANS iupac - international union of pure and applied chemistry
close container - ANS container sealed to prevent liquid/vapor escaping or dust
combustible liquid - ANS liquid with closed-cup flash point at or above 100F
container - ANS solids/liquids - vessel 60 gallons or less for storage/transportation;
compressed gas - container should been designed for 1 ATM at 68F̊; pipes and piping systems
with solid or liquid hazardous materials/compressed gases will not be in containers
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,corrosive materials - ANS causes permanent injury to human skin at a rate by DOT regulation;
liquid corrodes 1/4 inch of steel or aluminum within a year
design pressure - ANS max gauge pressure to withstand safely under the temp and conditions
dispensing - ANS pour/transfer material from container (can release products)
educational laboratory unit - ANS education purposes for students through 12th grade
excess flow control - ANS fail-safe system to shut off flow cause by pressurized piping system
rupture
exhausted enclosure - ANS device (typically a hood equipped w a fan) to capture and exhaust
workstation's mists; enclosure doesn't include room w ventilation
explosion - ANS expansion of gases, with either shock wave or disruption, of enclosed
material; explosion effects stem from
-chem changes
-physical changes (tank ruptures)
- atomic changes (nuclear fission or fusion)
chem changes - ANS -rapid oxidation
-deflaration
-detonation
-decomposition of molecules or run away polymerization
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, face velocity - ANS rate of air moving into chem fume hood entrance or place (measured at
plane)
fire separation - ANS horizontal/vertical fire resistance-rated assembly of materials that have
protected opening and designed to restrict fire spread
flammable gas - ANS gaseous state at normal atm temp or pressure; can ignite or burn when
mixed with oxidizer
oxidizers - ANS -air
-oxygen
flammable liquid - ANS liquid w closed-cup flash point below 100F̊
flammable solid - ANS solid (other than blasting agent or explosive) either in elemental or
alloy form, causes fire through friction, absorption of moisture, spontaneous chem change,
heat, ignites below 212F̊
example of flammable solids - ANS -aluminum powder
-camphor
-magnesium
-matches
-naphthalene
-nitrocellulose
-phosphorous
-sulfur and picric acid (wetted w greater than 10% water)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
100% CORRECT ANSWERS LATEST
VERSION 2025/2026.
Basement - ANS story partly below grade plane; 1/2 clear height
boiling point - ANS temp when liq vap pressure = 14.7 ATP/760 mmhg; unknown BP - 20%
evap point of distillation performed related to ASTM D 86
chemical - ANS element/compound/mixture of both
chemical name - ANS iupac - international union of pure and applied chemistry
close container - ANS container sealed to prevent liquid/vapor escaping or dust
combustible liquid - ANS liquid with closed-cup flash point at or above 100F
container - ANS solids/liquids - vessel 60 gallons or less for storage/transportation;
compressed gas - container should been designed for 1 ATM at 68F̊; pipes and piping systems
with solid or liquid hazardous materials/compressed gases will not be in containers
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,corrosive materials - ANS causes permanent injury to human skin at a rate by DOT regulation;
liquid corrodes 1/4 inch of steel or aluminum within a year
design pressure - ANS max gauge pressure to withstand safely under the temp and conditions
dispensing - ANS pour/transfer material from container (can release products)
educational laboratory unit - ANS education purposes for students through 12th grade
excess flow control - ANS fail-safe system to shut off flow cause by pressurized piping system
rupture
exhausted enclosure - ANS device (typically a hood equipped w a fan) to capture and exhaust
workstation's mists; enclosure doesn't include room w ventilation
explosion - ANS expansion of gases, with either shock wave or disruption, of enclosed
material; explosion effects stem from
-chem changes
-physical changes (tank ruptures)
- atomic changes (nuclear fission or fusion)
chem changes - ANS -rapid oxidation
-deflaration
-detonation
-decomposition of molecules or run away polymerization
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, face velocity - ANS rate of air moving into chem fume hood entrance or place (measured at
plane)
fire separation - ANS horizontal/vertical fire resistance-rated assembly of materials that have
protected opening and designed to restrict fire spread
flammable gas - ANS gaseous state at normal atm temp or pressure; can ignite or burn when
mixed with oxidizer
oxidizers - ANS -air
-oxygen
flammable liquid - ANS liquid w closed-cup flash point below 100F̊
flammable solid - ANS solid (other than blasting agent or explosive) either in elemental or
alloy form, causes fire through friction, absorption of moisture, spontaneous chem change,
heat, ignites below 212F̊
example of flammable solids - ANS -aluminum powder
-camphor
-magnesium
-matches
-naphthalene
-nitrocellulose
-phosphorous
-sulfur and picric acid (wetted w greater than 10% water)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
