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Hydraulics Manual > 1 > Flashcards

1 Flashcards

1
Q

One cubic foot contains…….inches

A

1728 cubic inches

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2
Q

One cubic foot contains……..gallons

A

7.5

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3
Q

One cubic foot of fresh water weighs…….pounds

A

62.5

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4
Q

One gallon contains………….. cubic inches

A

231

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5
Q

One gallon of fresh water weighs

A

8.33 pounds

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6
Q

A column of water 1’ high exerts a pressure of …………… at its base

A

O.434 psi

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7
Q

A column of water 2.304’ high exerts a pressure of………… at its base

A

1 psi

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8
Q

50’ length of 1.75” hose contains……..of gallons of water

A

6.24

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9
Q

50’ length of 1.88” hose contains…………..gallons of water

A

7.20

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10
Q

50’ length of 2.5” hose contains…………gallons of water

A

12.74

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11
Q

50” length of 3” hose contains…………gallons of water

A

18.35

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12
Q

100’ length of 4” hose………… gallons of water

A

65.25

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13
Q

100’ length of 5” hose contains…………… gallons of water

A

101.94

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14
Q

Nozzle pressure for hand lines with smooth bore nozzles

A

50 psi, can be increased to 65 psi to achieve higher flow

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15
Q

Nozzle pressure for master stream with smooth bore nozzles

A

80 psi, can be increased to 100 to achieve higher flow

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16
Q

Akron assault nozzles are designed to flow……… at what psi………

A

175 GPM at 50 psi

15/16” slug flows 185 GPM at 50 psi

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17
Q

Nozzle pressure for all other fog nozzles

A

100 psi

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18
Q

Formula for determine volume for a rectangular or square shaped container

A

LxWxDx 7.5(number of gallon in a cubic foot)

LxWx average depth x 7.5 
   Average depth ( a+a)/2
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19
Q

Formula to determine the volume of a cylinder, pipe, or hose

A

3.14 x r squared x H (or L) x7.5

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20
Q

Smooth bore nozzle discharge formula

A

29.7 x d squared x square root nozzle pressure

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21
Q

1/2” tip for a hand-line @ 50psi

A

Theoretical =53

Foreground =50

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22
Q

7/8” tip for hand line @ 50 psi

A

Theoretical = 161

Fireground= 150

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23
Q

15/16” tip for a hand line @ 50psi

A

Theoretical = 185

Fireground= 185

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24
Q

1” tip for hand line @ 50psi

A

Theoretical = 210

Fireground = 200

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25
Q

1 1/8” tip for a hand line @ 50 psi

A

Theoretical =266

Fireground = 250

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26
Q

1 1/4 tip for hand line @ 50 psi

A

Theoretical =328

Fireground= 325

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27
Q

1 1/4 tip for master stream @ 80psi

A

Theoretical =415

Fireground = 400

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28
Q

1 3/8” tip for a master stream@ 80 psi

A

Theoretical =502

Fireground = 500

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29
Q

1 1/2” tip for master stream @ 80psi

A

Theoretical =598

Fireground= 600

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30
Q

1 3/4” tip for master stream @ 80 psi

A

Theoretical =814

Fireground= 800

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31
Q

2” tip for master stream @ 80 psi

A

Theoretical = 1062

Fireground= 1000

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32
Q

1” adjustable gallonage fog nozzle is an adjustable flow nozzle that delivers

A

12-60 GPM

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33
Q

1 1/2” Akron assault nozzle flows

A

175 GPM

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34
Q

2 1/2” Akron assault nozzle is an adjustable flow nozzle that can deliver

A

125-250 GPM

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35
Q

Master stream fog nozzles have an operating range of

A

150-2000 GPM

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36
Q

Usually are 150’ long, can flow between 12-60gpm with 100 psi nozzle pressure

A

Booster reels

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37
Q

1” forestry hose

A

Comes in 50’ and 100’ sections

Flows between 12- 60 GPM
Red fog nozzles flows 22 gpm

Used at 100 psi

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38
Q

Decon shower

A

270 GPM at 75 psi

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39
Q

Piercing nozzle

A

Flows 125 GPM at 100 psi

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40
Q

Distributer nozzle

A

2 1/2” flows 250 GPM at 100 psi

1 1/2” flows 95. GPM at 50 psi

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41
Q

Cellar nozzle

A

2 1/2” flows 350 GPM at 100 psi

1 1/2 flows 160 GPM at 100 psi

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42
Q

Three different types of monitors used in Fairfax county

A

Fixed- permanently attached to the pumper

Portable- mercury monitor

Combination- fixed to engines but can be removed and connected to a ground mount
Smooth bore nozzle flows between
500-1000gpm at 80 psi

  Fog nozzle flows between 350-1250 at 100psi
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43
Q

Smooth bore break away nozzle

A

Tip 1 3/8 1 1/2 1 3/4 2

Flow 500 600 800 1000

Psi 110 110 110 120i

Flows between 500-1000 GPM

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44
Q

Task force tip automatic nozzle

A

Flows between 150- 1250 GPM

Flow 500 750 1000 1250

Psi 90 110 120 140

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45
Q

Akron adjustable flow nozzle

A

Flows between 500- 1250 GPM

Flow 500 750 1000 1250

Psi 100 110 130 140

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46
Q

Nozzle pressure for hand lines with smooth bore nozzles

A

50 psi, can be increased to 65 psi to achieve higher flow

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47
Q

Nozzle pressure for master stream with smooth bore nozzles

A

80 psi, can be increased to 100 to achieve higher flow

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48
Q

Akron assault nozzles are designed to flow……… at what psi………

A

175 GPM at 50 psi

15/16” slug flows 185 GPM at 50 psi

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49
Q

Nozzle pressure for all other fog nozzles

A

100 psi

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50
Q

Formula for determine volume for a rectangular or square shaped container

A

LxWxDx 7.5(number of gallon in a cubic foot)

LxWx average depth x 7.5 
   Average depth ( a+a)/2
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51
Q

Formula to determine the volume of a cylinder, pipe, or hose

A

3.14 x r squared x H (or L) x7.5

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52
Q

Smooth bore nozzle discharge

A

29.7 x d squared x square root nozzle pressure

53
Q

1/2” tip for a hand-line @ 50psi

A

Theoretical =53

Foreground =50

54
Q

7/8” tip for hand line @ 50 psi

A

Theoretical = 161

Fireground= 150

55
Q

15/16” tip for a hand line @ 50psi

A

Theoretical = 185

Fireground= 185

56
Q

1” tip for hand line @ 50psi

A

Theoretical = 210

Fireground = 200

57
Q

1 1/8” tip for a hand line @ 50 psi

A

Theoretical =266

Fireground = 250

58
Q

1 1/4 tip for hand line @ 50 psi

A

Theoretical =328

Fireground= 325

59
Q

1 1/4 tip for master stream @ 80psi

A

Theoretical =415

Fireground = 400

60
Q

1 3/8” tip for a master stream@ 80 psi

A

Theoretical =502

Fireground = 500

61
Q

1 1/2” tip for master stream @ 80psi

A

Theoretical =598

Fireground= 600

62
Q

1 3/4” tip for master stream @ 80 psi

A

Theoretical =814

Fireground= 800

63
Q

2” tip for master stream @ 80 psi

A

Theoretical = 1062

Fireground= 1000

64
Q

1” adjustable gallonage fog nozzle is an adjustable flow nozzle that delivers

A

12-60 GPM

65
Q

1 1/2” Akron assault nozzle flows

A

175 GPM

66
Q

2 1/2” Akron assault nozzle is an adjustable flow nozzle that can deliver

A

125-250 GPM

67
Q

Master stream fog nozzles have an operating range of

A

150-2000 GPM

68
Q

Usually are 150’ long, can flow between 12-60gpm with 100 psi nozzle pressure

A

Booster reels

69
Q

1” forestry hose

A

Comes in 50’ and 100’ sections

Flows between 12- 60 GPM
Red fog nozzles flows 22 gpm

Used at 100 psi

70
Q

Decon shower

A

270 GPM at 75 psi

71
Q

Piercing nozzle

A

Flows 125 GPM at 100 psi

72
Q

Distributer nozzle

A

2 1/2” flows 250 GPM at 100 psi

1 1/2” flows 95. GPM at 50 psi

73
Q

Cellar nozzle

A

2 1/2” flows 350 GPM at 100 psi

1 1/2 flows 160 GPM at 100 psi

74
Q

Three different types of monitors used in Fairfax county

A

Fixed- permanently attached to the pumper

Portable- mercury monitor

Combination- fixed to engines but can be removed and connected to a ground mount
Smooth bore nozzle flows between
500-1000gpm at 80 psi

  Fog nozzle flows between 350-1250 at 100psi
75
Q

Smooth bore break away nozzle

A

Tip 1 3/8 1 1/2 1 3/4 2

Flow 500 600 800 1000

Psi 110 110 110 120i

Flows between 500-1000 GPM

76
Q

Task force tip automatic nozzle

A

Flows between 150- 1250 GPM

Flow 500 750 1000 1250

Psi 90 110 120 140

77
Q

Akron adjustable flow nozzle

A

Flows between 500- 1250 GPM

Flow 500 750 1000 1250

Psi 100 110 130 140

78
Q

All variables being the same, friction loss will vary directly with the length of hose or pipe. Example: 2 1/2 “ line stretching 100’ long, flowing 250 gpm will have a friction loss of 25 psi. The same line extended an additional 100’ will have a friction loss of 50psi.

A

1st principle

79
Q

All variables the same,the friction loss varies approximately with the square of the increase in the velocity of flow. If the flow rate is doubled the friction loss will be four times greater

A

2nd principle

80
Q

When the flow remains constant the friction loss in a hose will decrease when the diameter of the hose is increased.mathematically, friction loss varies inversely to the 5th power as the diameter of the hose.

A

3rd principle

81
Q

For any given flow velocity, friction loss is independent of pressure. The velocity of water through a hose line, not pressure, causes friction loss.

A

4th principle

82
Q

Friction loss coefficient for 1”

A

150

83
Q

Coefficient for 1 3/4”

A

10 FFX County, 15.5 ifsta

84
Q

Coefficient for 2”

A

8

85
Q

Coefficient for 2 1/2”

A

2

86
Q

Coefficient for 3”

A

0.8

87
Q

Coefficient for 3 1/2”

A

0.34

88
Q

Coefficient for 4”

A

0.2

89
Q

Coefficient for 5”

A

0.08

90
Q

Formula for calculating friction loss

A

FL= C x Qsquared x L

91
Q

Less than 350 GPM, appliance loss is

A

0

92
Q

Over 350 GPM, appliance loss is

A

10

93
Q

Appliance loss in ladder pipes

A

25 psi

94
Q

Appliance loss in master streams, except mercury monitor

A

25 psi

95
Q

Appliance loss in standpipes

A

25 psi

96
Q

A column of water at a height of 10’ will exert a pressure of

A

4.34 psi

97
Q

Basic pump operators formula

A

PDP= NP+TPL

TPL = FL+ AL+ EP

98
Q

National foam JS-10 nozzle

A

Has a rating of 100 GPM at 100psi at the tip

Must be fully open or closed

Not equipped with bale

99
Q

Fairfax County Portable Foam Eductor

A

Flow 95 to 125 GPM with discharge pressure of 200psi at eductor

Must be placed 50’ from pump panel and within 200’ of nozzle

Nozzle should be no higher than 5 above pump panel

100
Q

Is a bypass proportioning system. An in-line eductor pre-piped into the front bumper discharge.

Line must be pumped 200 psi at the eductor

A

Akron truck mount foam system

101
Q

System allows foam solution to flow from all discharges
Intake pressure should not exceed 10 psi

If pumper is equipped with direct tank fill, use that connection

A

Waterous around the pump proportioner

102
Q

Is an electronic direct injection foam system that injects foam into the front bumper discharge

Capable of injecting 0.1% to 3% with a rated capacity of 3gpm of foam concentrate at 150 psi

A

Husky foam system

103
Q

All Fairfax County pumpers carry a minimum of

A

40 gallons of foam

104
Q

County CAFS pumpers each hold

A 
750 gallons of water
40 gallons of class  B foam
40 gallons of class A foam
105
Q

CAFS for fire attack

A

Application consist of 2/3 water and 1/3 air with a foam application rate 0.3%

106
Q

CAFS for overhaul and exposure protection

A

Application consists of 2/3 air and 1/3 water with a class A foam application rate of0.5%

107
Q

Amount of water required to create an effective stream is decreased by

A

25%

108
Q

Pierce recommends that CAFS only be used in line up to……… in length for maximum effectiveness

A

250’

109
Q

Relays are defined as

A

Two or more pumpers that are in line between water source and the nozzle

110
Q

4” supply lines should be charged to what initially

A

50 psi

111
Q

3” supply lines should be charged to what initially

A

100 psi

112
Q

If 4” and 3” supply line are used together, they should be charged to

A

100 psi

113
Q

Fairfax County pumpers are rated at

A

1500 GPM at 150 psi pump pressure

114
Q

If pump pressure is increased to 200 psi, the maximum flow decreases to

A

1050 GPM

115
Q

Maximum flow from a pressurized water source

A

Incoming static pressure + 150 psi

Pump is able to pump 100% of its rated capacity as long as water source can supply it

116
Q

Friction loss in multiple supply lines

A

Two 3” line = 0.2

One 4” and one 3” line = 0.09

Two 4” lines= 0.05

117
Q

Like volumes

A

0-10% = 3 times original amount
11-15%= 2 times original amount
16-25%= 1 times original amount
Greater than 25= less than one of the original amount

SP-RP x 100 / SP

118
Q

Starting PDP for sprinkler systems

A

150 psi

119
Q

Charge sprinkler systems when there is……………… or …………..

A

Smoke or fire showing, upon confirmation of a working fire

120
Q

Combination systems should be considered as a standpipe and ……….., start pressure is……….

A

Charged immediately upon arrival on scene without orders, 150 psi

121
Q

Aerial devices should be supplied with their own …… if possible

A

Pumpers

122
Q

What should be used to supply the aerial device

A

Minimum of one LDH or two 3” supply line

123
Q

Starting pressure for aerial device

A

150 psi

124
Q

Nozzle reaction for smooth bore

A

1.57 xD2 xNP

125
Q

Nozzle reaction for a fog nozzle

A

.0505 xQ x square root of NP

126
Q

Maximum flows that can be expected from a pumper at draft using the following inlets to the pump

A

Side intake= 1750 GPM
Rear intake= 1500-1750 GPM
Front intake= 900 GPM

127
Q

When I coming pressure exceeds ………, the pump shall be operated in pump gear

A

50 psi

128
Q

Operate on the principle of diverting the excess water back to the intake side of the pump or on the ground

A

Relief valves

129
Q

If pump pressure is increased to 250 psi the maximum flow decreases to

A

750 GPM

Hydraulics Manual (1 decks)

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