12 Fire Hazard Recognition Flashcards by Nino Miraglia

Unsafe behaviors include

Poor housekeeping
Ignoring ignition sources
Open burning
Improper use of electricity
Careless use of flammable liquids

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In general code requires I contained fires to not be within how many feet of a house

50 ft

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Portable heating device generally found on construction sites

Salamander

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Open burning fires should not be allowed when wind speeds are over

5 mph

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5 common causes of electrical fires

Worn equipment 
Improper use
Defective or improper installation
Power surges
Static

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Movement of electrical current between two electrodes or conductors

Arcing

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Condition where over using increases resistance and arcing occurs between the Armature and the electric magnetic field. Parking is the elements and ultimately ignition temperature of wire

Overloading

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Brief spike In voltage usually lasting milliseconds.

Power surge

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Non flowing electrical charge that can form on almost any surface

Static electricity

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Common conditions That can generate static charges

Gas or steam flowing from an open pipe especially cryogenic.
Pulverize material traveling through shoots.
Slurry loading of materials including explosives
belts in motion.
Fluid running through pipes

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Connection of two objects with a metal chain or strap in order to neutralize the static electrical charge between the two

Bonding

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Reducing the difference in electrical potential between an object and the ground by use of various conductors

Grounding

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Primary hazard associated with lumber yards and similar occupancies is

Hi fuel load

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Conditions that allow lumberyard fires to reach serious proportions include the following

Large undivided stacks of materials.
Congested storage conditions. 
Delayed fire detection. 
Inadequate fire protection. 
Combination of class a and class B

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In open yard storage of lumber. Stacks must be located on solid ground preferably paved. To ensure stability The height of the lumbar stacked must not exceed what

20 feet

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Driveways in a lumberyard must be spaced so that a maximum grid system of not more then what size is produced

50 x 150’

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When certain high hazard commodities such as vehicle tires, plastics, flammable liquids, pallets, are stored over 6 feet in height the store just considered

Hi piled storage

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Combustibles are considered high pile storage when they are stacked over what feet in height

Over 12 feet

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Type of storage method or materials are stored on pallets. Some wood, some metal or plastic. Plastic increases to three times the fuel load compared to wood

Pallet storage

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Consists of a structural framework onto which pallets or other materials are placed

Rack storage

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Involves stacking boxes, bags, or the products themselves directly on top of each other, which may be done by hand or forklift.

Solid piling

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Solid piling gives a fire the least chance to develop because it limits

Airspace between fuel units

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Most critical system in a storage or rack system for an inspector to check and ensure the system is functional is

Automatic sprinkler system

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An inspector must ensure that aisles are kept clear so that the material left on the floor will not help fire do what

Travel to the next rack of storage

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Fires in tire storage facilities create toxic oil. This causes long-lasting pollution and what type of contamination

Groundwater

Weeds in vegetation must be cleared out to how far from any tire pile

Within 50 feet of clear

Discarded pallets can be the greatest hazard because they are broken up and can be exposed to

Uncontrolled fires caused by lightning wildland or intentional

Something that may cause and ignition to occur or create conditions that will contribute to the size or spread of a fire once it has ignited

Unsafe behaviors

Airspace between pallets is generally how high

4 inches

Materials inside of recycling facilities may not be static closer than how far from the ceiling in a building without automatic sprinklers

No closer than 2 feet

Material stored inside recycling facilities may not be stacked closer than how far from the ceiling in a building that has automatic sprinklers

At least 18 inches below sprinklers

Waste handling operations involve the disposal of

Non-recyclable materials

Most common cause of fire at waste handling facilities

Open burning and spontaneous combustion

Incineration can reduce the bulk of waste by as much as

95%

Fuel fired incinerators must be preheated for how long before use

30 minutes

When inspecting an incinerator what must be cleaned on a regular basis and disposed of appropriately

Waste material Ash compartment

The largest concern with incinerators is

Hazardous waste

In very large HVAC systems mechanical equipment such as the heater itself must be located in a room that is separated from the rest of the building by a fire resistance wall and door rated at a minimum of

One hour

True false no storage is allowed inside the HVAC system room

True

Greatest concern of fire hazard from HVAC systems

Fire hazards from heating appliances

Common causes of fires related to heating appliances include

Poorly adjusted or worn fan belts. Clogged filters. Lint or debris bear burners. Poorly maintained motors

Another concern with the operation of HVAC systems

Spread of fire through air handling system

Combustion gases passed through tubes that are immersed in circulating water which is converted to steam. Type of boiler

Fire tube boiler

Type of boiler and is a steam generating unit in which steam and water circulate through a series of small drums and tubes. Combustion gases Passover outside of the elements

Watertube boiler

Almost all large boilers are of what type

Watertube boiler

Most common type of central heating appliance used today

Warm air furnaces

Type of furnace the operates primarily by the circulation of air without use of fans. Cold air settles into basement heated air rises

Gravity furnaces

Automatic controls are provided to turn off the furnace when the temperature was in the ductwork or Plenum reaches

250°F

Fire proms with warm air furnaces are principally do to

Inadequate clearances. Lack of proper limit controls. Heat exchanger burnouts improper installation or maintenance

Self-contained devices that are automatically controlled. This heater may be mounted on the floor or suspended from a wall or ceiling. Found in manufacturing or storage or gymnasiums

Unit heaters

Type of heater that uses the circulation of radiant heat. Self-contained units designed to heat the immediate surrounding area

Room heaters

Wood and coal stove, electric and gas logs, electric baseboard and open front heaters are considered what type of heater

Room heaters

Class a refrigerants are not considered toxic when a person is exposed to concentrations of less than

400 ppm by volume

Class B refrigerants are toxic when a person is exposed to concentrations less than

400 ppm by volume

Air moving systems were no cooling or heating of the air occurs

Ventilating systems

Three types of filters used in HVAC systems

Fibrous media unit filters. Renewable media filters. Electronic air cleaners

Primary fire hazard associated with electronic air filters is

Electrical malfunction igniting particulate matter inside

Which class of HVAC system will burn moderately when clean and emit moderate quantities of smoke

Class two filter. | Class one filter won't contribute fuel to a fire

Unless specially designed for lesser clearance, cooking equipment must have a clearance of how much for many combustible material

At least 18 inches

Dry chemical cylinders for cooking systems that way less than 150 pounds must be Hydro tested every

12 Years

Fusible links in cooking extinguishing systems must be replaced at least

Annually

Solid fuel systems like woodstoves must be installed on noncombustible floors and extend how far from the appliance in every direction

3 feet in all directions

Class of oven or furnace that operates in approximately atmospheric pressure with explosion or fire hazard potential one flammable volatiles are processed or heated

Class a

Type of oven or furnace that operates at approximately atmosphere condition or no flammable volatiles or combustible materials are heated

Class B

Type of oven or furnace with potential hazards due to flammable material used. Include a special atmosphere supply system with integral quench furnace and molten salt bath furnace

Class C

Type of oven or furnace that operates at temperatures from above Ambien to over 5000°F. Pressure is normally below atmosphere

Class D

The most common type of powered industrial truck is

Forklift

Most common type of forklift or industrial truck fuel

Electric battery and LPG

Chargers for electric battery operated units should be kept at least how far from combustible materials

5 feet

Must be a minimum of what distance between stake lines for tents

10 feet

Most common fuel gas used for metal cutting or thermal cutting is

Acetylene gas

The primary fire hazard associated with oxygen fuel gas equipment is

The storage of the oxygen and fuel gases in cylinders

Before welding or cutting operations can begin, when operating in an area where combustible materials such as paper clippings wood shavings etc. are on the floor an area with a radius of what size must be cleared

35 foot clearance radius

Following a welding or thermal cutting operation a fire watch must be maintained for at least how long after the job is completed

30 minutes

A firewatch must monitor adjacent areas to welding and thermal cutting in what circumstance

When walls or floor openings are within 35 feet

Another name for the type of work that involves welding thermal cutting etc.

Hot work

Process the most involves using an air spray gun that atomizes fluid as it is sprayed onto product

Fluid coating

Paint booths should be bonded and grounded so that

Static spark does not ignite vapors

Process where powder is suspended in air and then electrostatically charged. Product is then baked to cure coating

Powder coating

Major cause of fire in powder coating process

Static accumulation

Dip tanks and reservoirs should be contained with what fire rating construction

One hour container

Quenching oil should never be allowed to be with and what degrees of its flashpoint

50°

Normal flash point of various heated quenching mediums is

500°F

For heated quenching operations temperature ranges from

200-400°F

So that flammable liquids will not flow to lower levels quenching tanks should be located where

Grade level

Freeboard, distance from liquid surface to top of tank wonderful, should never be less than what height

6 inches

Tanks that contain how many gallons of quench oil or more should have drains to protect overflow

150 gallons or more

Any tank over how many gallons must have a bottom drain that opens automatically or manually in the event of fire

Any tank over 500 gallons

The floor or roof above a dry cleaning room must have a fire resistance rating of not less than

One hour

Dry cleaning room must have at least how many doors as a means of egress located at opposite ends of the room

Two doors at least

Dry cleaning room must be separated from the rest of the building by a partition with what fire resistance rating

Two hour fire resistance rating

At least two approved portable fire extinguishers must be provided near the doors and must be rated at

2-A:10-BC

Class I solvents for dry-cleaning have a flashpoint below what temperature

100°F

Combustible dust group, metal dust including aluminum magnesium and commercial alloys, hazardous in the use of electrical equipment

Group E

Combustible dust group of volatile dusts containing more than 8% carbonaceous material, includes cole carbon black charcoal and coke dusts

Group F

Combustible dust group of dust atmosphere is produced in flour grain wood flower plastic processing

Group G

Class to building combustible dust is an air hundred normal operating conditions in sufficient quantities to produce explosion. What division is it

Division I

class two building combustible dust produced due to abnormal operation and is present in quantities to produce explosion. What division

Division II

Means of dust control include providing enclosures for conveyor belts or reducing speed the grain movesmoves through facility

Passive dust control

Dust control that usually mechanical collection system capable of collecting 99.5% of dust and storing it in bins outside of facility

Active dust control

Subterranean tunnels and passageways of what length or longer must have two means of egress as remote from each other as possible in grain handling facilities

50 feet or longer

Most common place for fires to occur in woodworking operations is at or in

The dust hogger , catches splinters chips and saw dust

Asphalt and tar kettles must never be operated where

Inside a building or on its roof

A portable fire extinguisher rated at 40-BC must be located within how much of a candle for asphalt Or tar

25 feet

If a tar kettle is being used for roofing additional extinguisher of what size must be available

3-A:40-BC

Minimum size required portable fire extinguisher for clean rooms are

2 A-40 BC