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Fire Service Hydraulics and Water Supply 2nd Edition > Chapter 1: Water As An Extinguishing Agent > Flashcards

Chapter 1: Water As An Extinguishing Agent Flashcards

1
Q

What is the most important element in extinguishing a fire?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Simple Water

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2
Q

Water is a _______ Compound:

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Chemical

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3
Q

What is the temperature range of water in its liquid state?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Between 32 and 212 degrees F

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4
Q

What is another term for water vapor?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Steam

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5
Q

Can water be compressed in its liquid state?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

No

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6
Q

How many gallons are in 1 cubic foot of fresh water?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

7.48 gallons

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7
Q

What is the most useful state of water to fight fires in confined areas?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Steam

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8
Q

How is water’s density measured?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Pounds per cubic foot

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9
Q

Fire protection calculations typically assign ordinary fresh water a weight of _________ lbs per cubic foot?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

62.4

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10
Q

What is the weight of 1 gallon of water?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

8.34 lbs

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11
Q

What is the weight per cubic foot of seawater?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

64 lbs

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12
Q

How much does 1 gallon of seawater weigh?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

8.56 lbs

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13
Q

What is the primary way water extinguishes a fire?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

By cooling, or removing heat from the fire

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14
Q

All substances have a given capacity to absorb heat. This capacity is known as the substance’s:
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Specific Heat

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15
Q

Heat absorbtion, i.e. Heat transfer, occurs when:

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

heat flows from a warmer object to a cooler object. (it never occurs the other way around)

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16
Q

A British Thermal Unit is the amount of heat required to raise the temperature of:
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

1 lb of water 1 degree F

17
Q

What unit of measure has replaced the calorie in the International System of Units?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

A joule

18
Q

How many joules are in 1 calorie?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

4.18 joules

19
Q

Water absorbs heat ________ times more effectively than carbon dioxide?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

500

20
Q

The amount of heat that water can absorb when it changes from a liquid to vapor is referred to as:
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

The latent heat of vaporization

21
Q

The temperature at which a liquid absorbs enough heat to change to vapor is known as its:
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Boiling Point

22
Q

Each pound of water requires an additional ________ BTUs of additional heat to complete the conversion to steam from its boiling point?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

970 BTUs

23
Q

What is the expansion ratio of water from liquid to steam?

[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

1:1700

24
Q

The speed at which water absorbs heat increases in proportion to:
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

the surface area of the water exposed

25
Q

_________ has a greater heat-absorbing capacity than other common extinguishing agents?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A

Water

26
Q

What are some of the Disadvantages of water as an extinguishing agent?
[Fire Service Hydraulics and Water Supply: Chapter 1: Water As An Extinguishing Agent]

A
  1. Considerable amount of surface tension
  2. Reacts with some materials
  3. The temperature at which it freezes
  4. Low viscosity; Low adhesion ability
  5. Conducts electricity through particulates

Fire Service Hydraulics and Water Supply 2nd Edition (10 decks)

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