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Ground Operations > Water Supply, Hose, Tools > Flashcards

Water Supply, Hose, Tools Flashcards

0
Q

Static pressure

A

“Stored potential”

Normal pressure before water is released by a hydrant

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1
Q

Pressure

A

Defined as the force per unit area, measured in psi or kPa

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2
Q

Flow pressure

A

“Forward velocity”
Pressure discharged while opening and water Is flowing
Can be measured with pitot tube

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3
Q

Residual pressure

A

“Pressure left in distribution system”

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4
Q

Dry barrel

A

Installed is areas where freezing conditions are expected
Water is below the frost line and hydrant is empty, water is drained when re closed
Stim is vertical

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5
Q

How can you verify that the dry hydrant is empty?

A

Your hand will feel suction

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6
Q

Wet barrel

A

Installed in warmer climates
Always full of water
Stim is horizontal

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7
Q

How can you determine the amount of water pressure the hydrant operates?

A

It will be color coded

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8
Q

Hydrants are spaced how far apart in high value areas?

A

300ft

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9
Q

When would you be required intermediate hydrants

A

When the distance of intersections exceed 350to 400 ft

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10
Q

What are two types of water supplies?

A

Natural- lakes, ponds, rivers, oceans

Manmade- swimming pools, farm stock

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11
Q

What is drafting?

A

Drawing water from a static source to supply a pumper

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12
Q

When using a barrel strainer what’s the minimum of water surrounding it?

A

24inches

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13
Q

When would water shuttling operations need to be conducted?

A

When the distance is greater than 11/2 mile than the capability to lay supply lines

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14
Q

What are three key components to water shuttle operations?

A

Attack apparatus
Fill apparatus
Mobile water supply apparatus

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15
Q

What are two basic types of portable water tanks?

A

Collapsible

Self supporting

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16
Q

What needs to take place prior to opening a portable water tank?

A

Lay out a salvage cover

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17
Q

What are four types of tankers for unloading?

A

Gravity dumping
Jet pump
Apparatus pumps
Combination

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18
Q

Tankers are capable of dumping at what rate?

A

1,000 gpm

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19
Q

What factor must be considered when using a relay?

A

Water source must be able to supply and maintain desired pressure and volume for the duration of incident

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20
Q

What is used to hook up the apparatus to the water source?

A

Intake hose

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21
Q

What are the types of intake hoses used?

A

Soft

Hard

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22
Q

NFPA 1901 requires what?

A 
Pumpers carry 
15ft soft hose 
20ft hard hose 
800ft of 21/2inch hose 
Supply hose may be up to 6inches in diameter 
400ft 11/2 & 11/4 and 2 inch
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23
Q

11/2 hose

A

40-125 gpm

1-2 person

24
Q

13/4 hose

A

40-175 gpm

2 person

25
Q

2inch hose

A

100- 250gpm

2-3 person

26
Q

What are the four types of hose damage?

A

Mechanical- Preventive
Thermal
Organic
Chemical

27
Q

What do you do if you get chemicals on your hose?

A

Scrub with baking soda and water

28
Q

How do you clean dirt off woven jacket hose?

A

Broom to Brush dirt and dust

29
Q

What are lugs used for?

A

Aid in tighten and loosen couplings

30
Q

What are pin lugs uses for?

A

Use higbee cut to indicate coupling aliment

31
Q

Storz couplings

A

Sexless 1/4 of a turn to connect

32
Q

What does a Siamese do?

A

Connects two hose lines into one and uses a clapper to use only one supply line

33
Q

Adapter fitting

A

Double male to double female hook up

34
Q

Reducer fitting

A

Smaller hose line to lager

35
Q

Elbow fitting

A

Change the direction of flow

36
Q

Hose cap

A

Close off male coupling

37
Q

Hose plugs

A

Close off female

38
Q

What are three types of hose clamps?

A

Screw down
Press down
Hydraulic

39
Q

When applying a hose clamp it should be how far from the coupling?

A

5 ft

40
Q

What are Ramps and bridges used for?

A

Prevent damage from vehicles running over them

41
Q

Chafing blocks?

A

Protects the hose where it is subjected to vibrations

42
Q

Hose strap

A

Secures the hose to ladder

43
Q

What are 3 common types of hose Rolling?

A

Straight roll
Donut roll
Twin donut roll

44
Q

What are 3 types of loads?

A

Accordion
Flat load- pre connected
Minuteman

45
Q

What are the two types of tests the hose go through?

A

Acceptance- done by manufacturing

Service- done annually or subject to damage

46
Q

NFPA 1962

A

Requires hoses to hydro testes at 3 mins at max psi

47
Q

When water is applied to a fire it expands how much greater than original volume?

A

1700x

48
Q

What is the term when you suddenly stop the psi of the hose line damaging the plug?

A

Water hammer

49
Q

The rate of discharge is determined by gpm….

A

Low volume stream- less than 40 gpm
Handling stream- 40-350 gpm
Master stream- excess 350 gpm

50
Q

Types of direct firefighting

A

Penciling- short burst solid stream
Painting- constant flow
Combination

51
Q

What is the most dangerous disputation for fire fighters?

A

While responding in apparatus

52
Q

What is the only time you will jump from an apparatus?

A

To clear electrical hazards

53
Q

When do firefighter don hearing protection?

A

90 decibels

54
Q

What is the most common type of Manmade source for water?

A

Farm stock tanks

55
Q

What are the three types of strainers?

A

Barrel
Low level
Floating

56
Q

What are two types of fog nozzles?

A 
Manuel 
Auto (constant pressure)
57
Q

What are the types of nozzles?

A 
Fog 
Smooth bore (solid stream)

Ground Operations (4 decks)

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