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Essentials & More > Essentials C1,2&17 > Flashcards

Essentials C1,2&17 Flashcards

1
Q

A cubic foot of water expands how much

A

At 212°F it expands 1700 times its original volume

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2
Q

What is the freezing and boiling points of water

A

32°F 212°F or 100°C

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3
Q

What is the approved SI unit (SI= metric or international system) for all form of energy

A

Joule

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4
Q

What is a calorie

A

The amount of heat required to raise the temperature of 1 g of water 1°C

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5
Q

What is a British thermal unit BTU

A

The heat required to raise the temperature of 1 pound of water 1°F

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6
Q

What is specific gravity

A

The ratio of the mass of a given volume of liquid compared with the mass of an equal volume of water

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7
Q

What is the specific gravity of water

A

1

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8
Q

What is the relation to water of liquids with a specific gravity of less than or greater than one

A

Liquids with a specific gravity less than 1 are lighter than water
Those with the specific gravity greater than 1 are heavier than water

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9
Q

What is vapor density

A

The density of a gas or vapor in relation to air

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10
Q

What is the vapor density of air

A

1

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11
Q

what are the two types of chemical reactions as it relates to heat

A

Exothermic give off energy

endothermic absorb energy

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12
Q

What is one of the more common chemical reactions on earth

A

Oxidation reaction

It released energy and is exothermic

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13
Q

How low can the oxygen percentage be to support combustion

A

Normal air consist of 21% oxygen
combustion is supported at concentrations as low as 14%
research a shown it can occur at less than 2%

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14
Q

At what oxygen concentration will nomex burn vigorously

A

31% oxygen

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15
Q

In scientific terms of what is fuel involved in a combustion reaction known as

A

Reducing agent

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16
Q

What is pyrolysis

A

The chemical decomposition of a substance through the actions of heat
Fuel gas is evolved from solid fuels by pyrolysis

17
Q

What is the flammable or explosive range

A

The range of concentration of the fuel vapor and the air

18
Q

What are the three most common sources of heat that result in ignition of a fuel

A

Chemical and electrical and mechanical energy

19
Q

After firefighters leave the scene of a fire what may they be required to get if they want to return and re-enter the same

A

A search warrant

20
Q

What is an indication of flammable liquids used in a structure fire

A 
Abnormal behavior of fire when water is applied 
flashbacks 
reignition 
rekindles in the same area and 
an increase in fires intensity
21
Q

What is the Michigan versus Tyler US Supreme Court ruling

A

Once in a building fire fighters may seize evidence of arson that is in Plain view and officials need no warrant to remain in the building for a reasonable time to investigate the cause of the blaze after it’s been extinguished

Essentials & More (3 decks)

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