What do the letters and numbers mean on a fire extinguisher?

Extinguishers are classified by a number and letter symbol. The number indicates the relative size of the extinguisher, and the letter indicates the type of fire it will extinguish. … On Type B extinguishers, the number tells you the square footage of the fire the extinguisher can put out.

How do you read a fire extinguisher rating?

Fire Extinguisher Size Ratings

  1. The Class A size rating represents the water equivalency. Each number represents 1 ¼ gallons of water. …
  2. The Class B size rating indicates the square footage the extinguisher can cover. …
  3. There is no size rating for Class C. …
  4. There is also no size rating for Class D fires.

What does the letter B on a B 1 fire extinguisher indicate?

Answer: The letter “b” indicates it is effective against flammable liquid fires.

What does 2A 10BC mean?

A fire extinguisher that is rated 2A:10 BC means it has a fire fighting capacity equivalent to: 2.5 Gallons of Water and 10 Square Feet for a BC Type Fire.

What do the ABC ratings mean on fire extinguishers?

The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish.

Fire Extinguisher Ratings.

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Rating Pan Size (sq ft) Gallons of Heptane
40-B 100.0 125.0

What is the difference between 5BC and 10BC fire extinguisher?

In our tests, the 10BC units discharged only a fraction of a second longer than the 5BC, hardly “twice” anything. The 10BC, on average, discharged only 25% more fire suppressant than the 5BC.

Which vessel must have a Type B fire extinguisher on board?

Boats less than 26′ have to have at least one B-1 fire extinguisher on board. Boats 26′-40′ need to have at least two B-1 fire extinguishers on board. If the boat has a USCG approved fire extinguisher system installed for protection of the engine compartment, then the required number may be reduced.

What does the letter B on a B-1 fire extinguisher indicate quizlet?

What does the letter “B” on a B-1 fire extinguisher indicate? The type of fire it is designed to extinguish. What should you do before an inboard gasoline engine? Operate the blower for at least four minutes.

What is a Type B fire extinguisher used for?

Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering. Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical shock.

What is a Type D fire?

Class D fires only involving combustible metals – magnesium, sodium (spills and in depth), potassium, sodium-potassium alloys uranium, and powdered aluminum.

Fire safety