Fire Fighter 1 - Chapter 7 Portable Fire
Extinguishers Exam Q’s and A’s
A Class C extinguisher is rated for use on: - -energized electrical equipment.
-The weight of carbon dioxide is about ___________ times the weight of air. - -1.5
-For an area to qualify for the classification of "light hazard," most of the combustibles
present must be: - -arranged so that a fire is unlikely to spread.
-Which class of fire is depicted in the pictograph system by a fire in a frying pan? - -K
-A Class C agent must: - -not conduct electricity.
-What does it mean when a fire extinguisher has a pictograph with a red slash through it? -
-Use on that class of fire could be unsafe
-Which class of fire is depicted in the pictograph system by a flame and an electrical plug
and socket? - -C
-What is the best way to extinguish a Class C fire? - -Shut off the power and treat it as a
Class A or B fire
-A Class B foam extinguisher is effective on all of the following fuels except one. Choose the
exception. - -Cooking oil
-Which is a disadvantage of CO2 extinguishers? - -Short discharge range
-Which motion best accomplishes the removal of the pin and tamper seal from a portable
fire extinguisher? - -Twisting motion
-Which compound is added to a water extinguisher to improve penetration of fuel? - -A
wetting agent
-What is the primary extinguishing mechanism of halogenated agents? - -Disrupting the
molecular chain reaction
-Which class of fire includes combustible cooking oils and fats? - -K
-Which is a primary factor when determining hazard classification for extinguisher
selection and placement? - -Amount of combustibles present
-What is the term for the substance that puts out the fire? - -Extinguishing agent
Extinguishers Exam Q’s and A’s
A Class C extinguisher is rated for use on: - -energized electrical equipment.
-The weight of carbon dioxide is about ___________ times the weight of air. - -1.5
-For an area to qualify for the classification of "light hazard," most of the combustibles
present must be: - -arranged so that a fire is unlikely to spread.
-Which class of fire is depicted in the pictograph system by a fire in a frying pan? - -K
-A Class C agent must: - -not conduct electricity.
-What does it mean when a fire extinguisher has a pictograph with a red slash through it? -
-Use on that class of fire could be unsafe
-Which class of fire is depicted in the pictograph system by a flame and an electrical plug
and socket? - -C
-What is the best way to extinguish a Class C fire? - -Shut off the power and treat it as a
Class A or B fire
-A Class B foam extinguisher is effective on all of the following fuels except one. Choose the
exception. - -Cooking oil
-Which is a disadvantage of CO2 extinguishers? - -Short discharge range
-Which motion best accomplishes the removal of the pin and tamper seal from a portable
fire extinguisher? - -Twisting motion
-Which compound is added to a water extinguisher to improve penetration of fuel? - -A
wetting agent
-What is the primary extinguishing mechanism of halogenated agents? - -Disrupting the
molecular chain reaction
-Which class of fire includes combustible cooking oils and fats? - -K
-Which is a primary factor when determining hazard classification for extinguisher
selection and placement? - -Amount of combustibles present
-What is the term for the substance that puts out the fire? - -Extinguishing agent
