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From Flashcardlet > Month 12; Hydraulics Section 1 + Field Hydraulics > Flashcards

Month 12; Hydraulics Section 1 + Field Hydraulics Flashcards

(61 cards)

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0
Q

SM-3F Automatic Nozzle

Hose, GPM, Engine Pressure @ 200ft?

A

1”, 30GPM, 150 PSI

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1
Q

SM-3F Automatic Nozzle

Location: Booster Reel

GPM and PSI Range?

A

10-50 GPM @ 70-110 PSI

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2
Q

SM-20F Automatic Nozzle

Location 1 3/4 Hand Lines

GPM and PSI Range?

A

60-245 GPM @ 70-110 PSI

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3
Q

SM-20F Automatic Nozzle

1 3/4 Pre-Connect

GPM, Engine Pressure @ 150ft, @ 200ft

A

GPM- 125

Engine Pressure 150ft - 118

Engine Pressure 200 ft - 127

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4
Q

SM-20F Automatic Nozzle

1 3/4 Pre-Connect

GPM, Engine Pressure @ 150ft, @ 200ft

A

GPM - 175

Engine Pressure @ 150ft - 150

Engine Pressure @ 200 ft. - 169

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5
Q

SM-30F Automatic Nozzle

  • Location 2 1/2 hand lines
  • GPM and PSI Ranges?
A
  • 85 to 345 GPM

- 70-110 PSI

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6
Q

SM-30F Automatic Nozzle

2 1/2 Blitz Line

GPM, Engine Pressure at 150 ft, Engine Pressure at 200 ft.

A

GPM - 250

Engine Pressure @ 150 ft - 113

Engine Pressure @ 200 ft - 117

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7
Q

SM-30F Automatic Nozzle

2 1/2 Blitz Line

GPM, Engine Pressure at 150 ft, Engine Pressure at 200 ft.

A

GPM - 300

Engine Pressure @ 150 ft - 126

Engine Pressure @ 200 ft - 132

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8
Q

1 1/2” Mystery Nozzle

Location: 1 3/4” foam lines (91 Darleys) and some hi rise packs.

GPM and PSI?

A

125 GPM

75 PSI

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9
Q

1 1/2” Mystery Nozzle

GPM, Engine Pressure @ 150ft, Engine Pressure @ 200ft

A

GPM - 125

Engine Pressure @ 150 ft - 118

Engine Pressure @ 200 ft - 127

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10
Q

Piercing Nozzle

Location: Gold Box

GPM and PSI Range?

A

125 GPM @ 100 PSI

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11
Q

Piercing Nozzle

GPM, Engine Pressure @ 150 ft, Engine Pressure @ 200 ft

A

GPM - 125

Engine Pressure @ 150 - 130

Engine Pressure @ 200 ft - 140

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12
Q

Foam Eductor

A

.

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13
Q

Cellar Nozzle

Location: Gold Box

GPM and PSI

A

260 GPM @ 100 PSI

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14
Q

Bresnen Distributor Nozzle

Location: Gold Box

GPM and PSI

A

340 GPM @ 50 PSI

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15
Q

Forestry Nozzle

A

Friction Loss and Nozzle Pressure are not calculated

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16
Q

Master Stream

Elkhart

A

1000 GPM @ 100 PSI (NP)

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17
Q

Elkhart Select-o-matic

A

350-1000 GPM @ 100 PSI (NP)

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18
Q

Elkhart Select-o-matic

A

500-1000 GPM @ 100 PSI (NP)

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19
Q

Akron Apollo

A

500-1250 GPM @ 100 PSI

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20
Q

Elevated Streams L-91, P-93 Combination Nozzles

TFT Master Nozzle

A

-150-1250 GPM @ 100 PSI

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21
Q

Hand Held Solid Stream Tips

PSI?

A

50 PSI

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22
Q

Handheld Solid Stream Tips

1 3/4 Hand Line Nozzles
GPM? Engine Pressure @ 150 ft. 
1/2"
7/8"
15/16"
A

1/2” - 50 GPM, 55 Engine Pressure
7/8” - 160 GPM, 110 Engine Pressure
15/16” - 190 GPM, 135 Engine Pressure

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23
Q

Handheld Solid Stream Tips

2 1/2” Hand Line Nozzles
GPM and Engine Pressure @ 150 ft.

1”
1 1/8”
1 1/4”

A

1” - 200 GPM, 65 Engine Pressure
1 1/8” 250 GPM, 70 Engine Pressure
1 1/4” 300 GPM, 75 Engine Pressure

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24
Master Stream Solid Stream Tips PSI?
80 PSI
25
Master Stream Solid Stream Tips 1 3/8" 1 1/2" 1 3/4" 2"
1 3/8" - 500 GPM 1 1/2" - 600 GPM 1 3/4" - 800 GPM 2" - 1000 GPM
26
Appliances (Reducers, Increasers, Gates, Wyes, manifolds, aerial waterways, and standpipe) Friction Loss for an appliance - Less than 350 GPM - Over 350 GPM
- Less than 350 GPM = 0 PSI | - More than 350 GPM = 10 PSI
27
Monitor Friction Loss?
25 PSI Friction Loss
28
Aerial Waterway
Friction Loss is 10 PSI GPM flow is determined using the flow meter Standard operating pressure should be 200 PSI or less A max of 250 PSI is allowed but a relief valve for the tower will be spilling water.
29
Principles or Friction Loss
4 Principles
30
First Principle - Friction Loss
If all other conditions are the same, friction loss varies directly with the length of the hose or pipe. ***Longer the hose the more friction loss***
31
Second Principle - Friction Loss
When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. ***As GPM Increases then Friction Loss Increases***
32
Third Principle - Friction Loss
For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. ***Larger the hose then less friction loss***
33
Fourth Principle - Friction Loss
For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.
34
Principles of Pressure
Six Principles
35
First Principle - Pressure
Fluid pressure is perpendicular to any surface on which it acts.
36
Second Principle - Pressure
Fluid pressure at a point in a fluid at rest is the same intensity in all directions.
37
Third Principle - Pressure
Pressure applied to a confined fluid from without is transmitted equally in all directions.
38
Fourth Principle - Pressure
The pressure of a liquid in an open vessel is proportional to its depth.
39
Fifth Principle - Pressure
The pressure of a liquid in an open vessel is proportional to the density of the liquid.
40
Sixth Principle - Pressure
The pressure of a liquid on the bottom of a vessel is independent of the shape of the vessel.
41
What does 1 Gallon of water weigh?
8.33 lbs
42
1 Gallon of water contains how many cubic inches?
231 cubic inches
43
How many cubic feet are in 1 Gallon of water?
0.1337 cubic ft.
44
How many cubic inches are in one cubic ft?
1728 Cubic Inches
45
How many gallons of water in 1 cubic ft?
7.481 Gallons
46
How much does 1 cubic ft of water weigh?
62.5 lbs
47
1 ft water column will exert what psi at the base?
.434 psi at the base
48
1 psi will raise water how many ft?
2.304 ft
49
1 cubic ft a second flow equals how many gpm?
449 gpm
50
When extending a pre-connect. -Add how many psi for 1 3/4" @ 125 GPM per 50' Section
-10 PSI
51
When extending a pre-connect -Add how many psi for 2 1/2" @ 250 GPM per 50' Section?
-5 PSI
52
Friction loss for 2 1/2 hose -Drop zero drop 10 method
1. Start with the GPM flow through the hose. Ex. 350 GPM 2. Drop the last digit (drop zero) 350 = 35 3. When flowing less than 450 GPM reduce the value by ten 35=25 psi FL/100' 4. When flowing 450 gpm or more only drop the zero. Ex. 450 GPM = 45 psi FL/100' 5. This method produces a friction loss value in PSI per 100' of hose.
53
Relay Pumping
- Do not exceed the rated pressure of the hose or capacity of the pump. - Minimum intake pressure on the receiving pump is 20 PSI. - Maximum intake pressure on the receiving pump is 90 PSI.
54
Supplying an Arial
- Do not exceed the rated pressure of the hose or capacity of the pump. - Add 10 PSI Friction loss for the aerial waterway. - Add 25 PSI Friction loss for the monitor - Add in the estimated elevation loss (+/-) - The flow meter can be used to determine the GPM flow. - Standard operating pressure should be 200 PSI or less. - A max of 250 psi is allowed but a relief valve for the tower will be spilling water.
55
Elevation Loss (+/-)
-Add 5 PSI per floor not counting the first floor.
56
What are the intake relief valves set by dept mechanic?
120-150 psi
57
Relief valves
Set by driver to 10-20 psi above the anticipated operating pressure.
58
Pressure governors
-Automatically adjust engine RPM to maintain the desired engine pressure. Set by driver to the desired operating pressure.
59
What are the two purposes of a relief valve?
- Purpose is to relieve excess pressure on the discharge side of the pump. - Purpose is to relieve excess pressure on the intake side of the pump.
60
What does a pressure governor do?
The main feature of a pressure governor is that it regulates the power output of the engine to match pump discharge requirements.

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