OFM TESTING QUIZZES WITH
VERIFIED LATEST SOLUTIONS .
what is burning called - Correct Answer -combustion
how do most fire extinguishers stop the burning of a fire - Correct Answer -by cooling the
fuel below its ignition temp, and by cutting off the supply of oxygen
class a fire - Correct Answer -ordinary combustibles material such as wood, paper, cloth,
rubber and household rubbish
what extinguishing agent should be used on class a fires - Correct Answer -water is the most
common agent for class a
class b fires - Correct Answer -flammable or combustible liquids (gasoline, kerosene, diesel
fuel, motor oil)
class c fires - Correct Answer -energized electrical equipment
what extinguishing agent should be used on class c fires - Correct Answer -use dry chemical
or CO2 agents
class d fires - Correct Answer -Combustible metals
class k fires - Correct Answer -Kitchen Fires
what extinguishing agent should be used on class k fires - Correct Answer -class k agent and
wet chemical agent
1
,what does a typical class a fire extinguisher contain - Correct Answer -2.5gal of water and
has a 2-A rating
2-A:10-B:C rating extinguisher - Correct Answer -used on class A, B and C fires
ordinary combustible label on extinguishers - Correct Answer -green triangle with A in the
middle
Flammable liquid label on extinguishers - Correct Answer -red square with B in the middle
electrical equipment label on extinguishers - Correct Answer -blue circle with C in the middle
combustible metals label on extinguishers - Correct Answer -yellow star with D in the middle
where should agents weighing up to 18kg (40lbs) be mounted - Correct Answer -should be
mounted so the top of the agent is not more than 1.5m above the floor
where should agents weighing more than 18kg (40lbs) be mounted - Correct Answer -should
be mounted so that the top of the agent is not more then 1m above the floor
how far should the bottom of the extinguisher be from the floor - Correct Answer -at least
102mm (4in) above the floor
Class B extinguisher - Correct Answer -- discharge solution of water and either aqueous film-
forming foam or film-forming fluoro protein foam
- results in a foam solution that floats over the surface of the burning liquid, creating a blacket
- effective for class a and fires involving polar solvents
wet chemical extinguisher - Correct Answer -- for class k fires (kitchen)
- converts the fatty acids in cooking oils to soap/foam
halogenated agent - Correct Answer -- produced from liquified gases; fluorine, bromine,
iodine, and chlorine
2
,- leave no residue
- for areas that have computers/electrical equipment
dry powder agent - Correct Answer -- for combustible metals (class d)
- form a solid crust over burning metal, which blocks out the oxygen
Water extinguisher - Correct Answer -when applied quickly converts from liquid into steam,
absorbing heat
the most popular stored pressure water type extinguisher - Correct Answer -9.5L with 2-A
rating
water mist extinguisher - Correct Answer -- white in colour
- has discharge hose that is connected to an applicator wand and misting nozzle
loaded stream fire extinguisher - Correct Answer -- used when the temp is below 0 degrees
- discharge water containing an alkali metal salt
wetting agent - Correct Answer -discharge water the contains a solution to reduce surface
tension
dry chemical extinguisher - Correct Answer -- effective on class B and C fires
- can be stored in areas that go below 0 degrees
- stream of finely ground particles onto a fire
carbon dioxide extinguisher - Correct Answer -- when CO is discharged on fire it forms a
dense cloud that displaces the air surrounding the fuel
- pressure 823psi
- for classes B and C fire only
supply hose - Correct Answer -deliver water to attach pump/tanker from a water supply
- carries large volumes of water at lower pressure
3
, attack hose - Correct Answer -discharge water from attack pump onto the fire
what do the sizes of hose range from for supply hose - Correct Answer -3/4in - 6in
what size of hose used for attack - Correct Answer -1 3/4 in and 1 1/2 in
how much can a 1 1/2 in hose flow - Correct Answer -189 - 473 L/min (50-125gpm)
how much can a 1 3/4 in hose flow - Correct Answer -454-681 L/min (120 - 180gpm)
booster hose diameter - Correct Answer -1 in
what is booster hose used for - Correct Answer -small outdoor fires
how much does a 2 1/2 in hose flow, and what is it used for during attack - Correct Answer --
flow 946 L/min
- used in large structure fires
3in hose used for - Correct Answer -deliver water to portable monitors
single jacket hose - Correct Answer -one layer of woven fibre
multiple jacket hose - Correct Answer -2 or more layers of woven fibre
Threaded Coupling - Correct Answer -- used on hose up to 3in
- male and female ends
Storz-type (nonthreaded) hose coupling - Correct Answer -A hose coupling that has the
property of being both the male and the female coupling. It is connected by engaging the lugs
and turning the coupling a one-third turn.
4
VERIFIED LATEST SOLUTIONS .
what is burning called - Correct Answer -combustion
how do most fire extinguishers stop the burning of a fire - Correct Answer -by cooling the
fuel below its ignition temp, and by cutting off the supply of oxygen
class a fire - Correct Answer -ordinary combustibles material such as wood, paper, cloth,
rubber and household rubbish
what extinguishing agent should be used on class a fires - Correct Answer -water is the most
common agent for class a
class b fires - Correct Answer -flammable or combustible liquids (gasoline, kerosene, diesel
fuel, motor oil)
class c fires - Correct Answer -energized electrical equipment
what extinguishing agent should be used on class c fires - Correct Answer -use dry chemical
or CO2 agents
class d fires - Correct Answer -Combustible metals
class k fires - Correct Answer -Kitchen Fires
what extinguishing agent should be used on class k fires - Correct Answer -class k agent and
wet chemical agent
1
,what does a typical class a fire extinguisher contain - Correct Answer -2.5gal of water and
has a 2-A rating
2-A:10-B:C rating extinguisher - Correct Answer -used on class A, B and C fires
ordinary combustible label on extinguishers - Correct Answer -green triangle with A in the
middle
Flammable liquid label on extinguishers - Correct Answer -red square with B in the middle
electrical equipment label on extinguishers - Correct Answer -blue circle with C in the middle
combustible metals label on extinguishers - Correct Answer -yellow star with D in the middle
where should agents weighing up to 18kg (40lbs) be mounted - Correct Answer -should be
mounted so the top of the agent is not more than 1.5m above the floor
where should agents weighing more than 18kg (40lbs) be mounted - Correct Answer -should
be mounted so that the top of the agent is not more then 1m above the floor
how far should the bottom of the extinguisher be from the floor - Correct Answer -at least
102mm (4in) above the floor
Class B extinguisher - Correct Answer -- discharge solution of water and either aqueous film-
forming foam or film-forming fluoro protein foam
- results in a foam solution that floats over the surface of the burning liquid, creating a blacket
- effective for class a and fires involving polar solvents
wet chemical extinguisher - Correct Answer -- for class k fires (kitchen)
- converts the fatty acids in cooking oils to soap/foam
halogenated agent - Correct Answer -- produced from liquified gases; fluorine, bromine,
iodine, and chlorine
2
,- leave no residue
- for areas that have computers/electrical equipment
dry powder agent - Correct Answer -- for combustible metals (class d)
- form a solid crust over burning metal, which blocks out the oxygen
Water extinguisher - Correct Answer -when applied quickly converts from liquid into steam,
absorbing heat
the most popular stored pressure water type extinguisher - Correct Answer -9.5L with 2-A
rating
water mist extinguisher - Correct Answer -- white in colour
- has discharge hose that is connected to an applicator wand and misting nozzle
loaded stream fire extinguisher - Correct Answer -- used when the temp is below 0 degrees
- discharge water containing an alkali metal salt
wetting agent - Correct Answer -discharge water the contains a solution to reduce surface
tension
dry chemical extinguisher - Correct Answer -- effective on class B and C fires
- can be stored in areas that go below 0 degrees
- stream of finely ground particles onto a fire
carbon dioxide extinguisher - Correct Answer -- when CO is discharged on fire it forms a
dense cloud that displaces the air surrounding the fuel
- pressure 823psi
- for classes B and C fire only
supply hose - Correct Answer -deliver water to attach pump/tanker from a water supply
- carries large volumes of water at lower pressure
3
, attack hose - Correct Answer -discharge water from attack pump onto the fire
what do the sizes of hose range from for supply hose - Correct Answer -3/4in - 6in
what size of hose used for attack - Correct Answer -1 3/4 in and 1 1/2 in
how much can a 1 1/2 in hose flow - Correct Answer -189 - 473 L/min (50-125gpm)
how much can a 1 3/4 in hose flow - Correct Answer -454-681 L/min (120 - 180gpm)
booster hose diameter - Correct Answer -1 in
what is booster hose used for - Correct Answer -small outdoor fires
how much does a 2 1/2 in hose flow, and what is it used for during attack - Correct Answer --
flow 946 L/min
- used in large structure fires
3in hose used for - Correct Answer -deliver water to portable monitors
single jacket hose - Correct Answer -one layer of woven fibre
multiple jacket hose - Correct Answer -2 or more layers of woven fibre
Threaded Coupling - Correct Answer -- used on hose up to 3in
- male and female ends
Storz-type (nonthreaded) hose coupling - Correct Answer -A hose coupling that has the
property of being both the male and the female coupling. It is connected by engaging the lugs
and turning the coupling a one-third turn.
4
