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21 - FFx County Hydraulics Manual Flashcards

1
Q

What is the formula to find the nozzle discharge from a smooth bore nozzle?

A

29.7xD^2x√NP

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2
Q

What is the formula to calculate nozzle reaction from a smooth bore?

A

1.57xD^2xNP

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3
Q

What is the formula to calculate nozzle reaction for a fog stream nozzle?

A

.0505xQx√NP

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4
Q

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

A

.434 psi

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5
Q

Smooth bore handline pressure can be increased to what PSI for a higher flow?

A

65 psi

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6
Q

How many GPM does a handline tip size of 1 1/4” flow? (Theoretical)

A

328 gpm

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7
Q

How many GPM does a master stream flow with a tip size of 1 3/8”? (Theoretical?

A

502 gpm

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8
Q

The 2 1/2” cellar nozzle flows how many GPM and at what PSI?

A

350 gpm, 100 psi

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9
Q

What is the tip size of the smooth bore nozzle used on the Akron Quick-Attack Mercury Monitor?

A

1 3/8”

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10
Q

What is the maximum inlet pressure for the Mercury Monitor?

A

150 psi

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11
Q

Below what GPM is there no appliance loss?

A

350 gpm

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12
Q

What is the maximum safe PDP?

A

250 psi

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13
Q

How many GPM does a hadline tip size of 7/8” flow? (Theoretical)

A

161 gpm

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14
Q

At what PSI and how many GPM does the JS-10 nozzle flow?

A

100 psi, 100 gpm

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15
Q

The Portable Foam Eductor must be placed how many feet from the pump panel and within how many feet of the nozzle?

A

50’, 200’

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16
Q

When using CAFS, the amount of water required to create an effective stream is decreased by?

A

25%

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17
Q

Most Fairfax County pumpers are rated at what GPM at 150 psi?

A

1500 gpm

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18
Q

What is the coefficient for using one 4” and one 3” line?

A

0.09

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19
Q

When drafting, what is the RPM range to set at the pump panel?

A

1000-1200 RPM

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20
Q

What intake is best used during drafting operations?

A

Side intake

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21
Q

How many gallons does one cubic foot contain?

A

7.5 gal

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22
Q

How much pressure does a column of 1 foot of water exert?

A

.434 psi

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23
Q

How much water does a 50’ section of 1.88” hose contain?

A

7.2 gal

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24
Q

What is the term to describe the water pressure due to elevation?

A

Head pressure

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25
Q

What is the formual to determine the volume of a rectangular/square shaped container?

A

L X W X D X 7.5gal

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26
Q

What is the formula to determine the volume of a cylindrical shape?

A

3.14 X r^2 X H X7.5 gal

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27
Q

What is the formula to determine the discharge of a smooth bore nozzle?

A

29.7X d^2 X sqrt(NP)

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28
Q

What is the theoretical calculation gpms of an 1 1/4” smooth bore nozzle being flowed at 50psi?

A

328 gpm

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29
Q

What is the fireground gpms for an 1 3/4” smooth bore nozzle being flowed at 80psi?

A

800 gpm

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30
Q

What is the range of GPMs the 2 1/2” Akron Assault Fog Nozzle can deliver?

A

125-250 gpm

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31
Q

How many gallons are delivered and at what nozzle pressure does the booster reel operate at?

A

12-60gpm, 100psi

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32
Q

How many gallons are delivered and at what psi is the decon shower operated at?

A

270 gpm, 75 psi

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33
Q

How many gallons are delivered and at what psi is the piercing nozzle operated at?

A

125 gpm, 100 psi

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34
Q

What is the first principle of friction loss?

A

Friction loss varies directly with the length of hose or pipe

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35
Q

What is the fourth principle of friction loss?

A

Friction loss is independent of pressure

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36
Q

What rating does the JS-10 nozzle have and what is the nozzle pressure?

A

100 gpm, 100 psi

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37
Q

How far away must the foam eductor be placed away from the pump panel?

A

50’

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38
Q

What is the coefficient used for supplyu using 3” and 4”?

A

0.09

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39
Q

If there is a 14% drop from static to residual pressure, how many like volumes are left?

A

2 times the original amount

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40
Q

What is the minimum type of supply line to be used for an elevated master stream?

A

One LDH or two 3”

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41
Q

Theoretic GPM for 1/2” tip on a handline

A

53

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42
Q

Theoretical GPM for a 7/8” tip on a handline

A

161

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43
Q

Theoretical GPM for a 15/16” tip on a handline

A

185

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44
Q

Theoretical GPM for a 1” tip on a handline

A

210

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45
Q

Theoretical GPM for a 1 1/8” tip on a handline

A

266

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46
Q

Theoretical GPM for a 1 1/4” tip on a handline

A

328

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47
Q

Formula for determining volume for a rectangular or square shaped container

A

L’ x W’ x D’ x 7.5

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48
Q

The formula to determine the volume of a cylinder, pipe, or hose in gallons

A

π x r2 x H’ (or L’) x 7.5

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49
Q

Formula for determining the flow from a smooth bore nozzle

A

gpm = 29.7 x d2 x Sq Rt NP

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50
Q

Theoretical GPMs for a 1 1/4” tip on a master stream

A

415

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51
Q

Theoretical GPMs for a 1 3/8” tip on a master stream

A

502

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52
Q

Theoretical GPMs for a 1 1/2” tip on a master stream

A

598

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53
Q

Theoretical GPMs for a 1 3/4” tip on a master stream

A

814

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54
Q

Theoretical GPMs for a 2” tip on a master stream

A

1062

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55
Q

The Decon shower flows 270 GPM at how many PSI?

A

75

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56
Q

The piercing nozzle flows 125 GPM at how many PSI?

A

100

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57
Q

The 2 1⁄2” distributer nozzle flows 250 gpm at how many psi?

A

100

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58
Q

The 1 1⁄2” distributer nozzle flows 95 gpm at how many psi?

A

50

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59
Q

The 2 1⁄2” cellar nozzle flows 350 gpm at how many psi?

A

100

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60
Q

The 1 1⁄2” cellar nozzle flows 160 gpm at how many psi?

A

100

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61
Q

What is the study of fluids at rest?

A

Hydraulics

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62
Q

How much does one cubic foot of fresh water weigh?

A

62.5 pounds

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63
Q

How many cubic inches are in one cubic foot?

A

1,728

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64
Q

How much does one gallon of fresh water weigh?

A

8.33 pounds

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65
Q

A 50’ length of 1-3/4” hose contains how may gallons of water?

A

6.24

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66
Q

A 50’ length of 1.88” hose contains how may gallons of water?

A

7.2

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67
Q

A 50’ length of 2-1/2” hose cantains how many gallons of water?

A

12.74

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68
Q

A 50’ length of 3” hose contains how many gallons of water?

A

18.35

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69
Q

A 100’ length of 4” hose cantains how many gallons of water?

A

65.25

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70
Q

How many GPM do our Akron Assault nozzles flow using the fog tip?

A

175

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71
Q

How many GPM do our Akron Assault nozzles flow using the 15/16” slug?

A

185

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72
Q

What is the nozzle pressure for hand lines with smooth bore nozzles?

A

50

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73
Q

What is the nozzle pressure for master streams with smooth bore nozzles?

A

80

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74
Q

How many GPM does the Akron Quick-Attack Mercury monitor flow?

A

500

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75
Q

What is your appliance loss when flowing less than 350 GPM?

A

0

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76
Q

What number do we use on the fire ground for calculating elevation pressure?

A

5

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77
Q

The Husky Foam Systems are able to inject foam at what percent?

A

0.1% - 3%

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78
Q

What is the starting pressure when using both 3” and 4” supply lines at the same time?

A

100

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79
Q

What limits the maximum amount of water being delivered to the fire scene in a relay operation?

A

The water source and the pumping capacity of the smallest pumper

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80
Q

What is the starting pressure for a standpipe?

A

150

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81
Q

If you are pumping a fog nozzle that is not an Akron Assault, what is the nozzle pressure?

A

100 psi

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82
Q

To achive a higher flow from a smooth bore handline, you should

A

increase nozzle pressure to 65 psi

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83
Q

Pumper discharge pressure is measured in

A

psi

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84
Q

An appliance known as a Siamese does what?

A

combines two or more hoselines into one

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85
Q

When pumping forestry line, the nozzle pressure is

A

100 psi

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86
Q

What accessory flows 270 gpm at 75 psi?

A

decon shower

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87
Q

What size smooth bore tip is on the Mercury Monitor?

A

1.375”

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88
Q

You are pumping the Mercury Monitor with a fog nozzle, you are asked to increase the pressure, what is the max pressure you can increase to?

A

150 psi

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89
Q

What is the friction loss for a gated wye flowing 300 gpm?

A

0

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90
Q

The county’s foam eductor is required to be how close to the nozzle?

A

200 feet

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91
Q

To avoid air build up in a hoseline while using CAFS, what must be done?

A

bale slightly open at all times

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92
Q

What hose line combination have the same friction loss as one 4”?

A

dual 3”

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93
Q

What building system is to be charged only when confirmation of fire or smoke/fire showing?

A

sprinkler

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94
Q

When operating as a relay pumper, what pressure can your pump be operated in without being in gear?

A

50 psi or less

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95
Q

If 3” and 4” hoses are being used for supply, what is the starting pressure?

A

100 psi

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96
Q

As water leaves the nozzle under pressure it causes a force in opposite direction, which is called?

A

nozzle reaction

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97
Q

The formula for determining volume of water in a rectangular or square container is LxWxDx what number?

A

7.5

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98
Q

Pressure created by the velocity of water coming from a discharge is called?

A

flow pressure

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99
Q

One cubic foot of fresh water weighs?

A

62.5 lbs

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100
Q

Master stream fog nozzles have operating range of?

A

150-2000 gpm

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101
Q

How tall of a column exerts the pressure of 1 psi at its base?

A

2.304’

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102
Q

How much does one cubic foot of fresh water weigh?

A

62.5

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103
Q

How much does a 50’ section of 3” hose weigh?

A

18.35

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104
Q

What is the starting nozzle pressure for an Akron Assault Nozzle?

A

50

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105
Q

What can the nozzle pressure for master streams with smooth bore nozzles be increased to?

A

100

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106
Q

What does EL stand for when it comes to Hydraulics?

A

Nothing, the correct abbreviation is EP for elevation pressure

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107
Q

What is the formula for determining the volume of a cylinder, pipe, or hose in gallons?

A

p x r2 x H’ x 7.5

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108
Q

What is the formula for determining the discharge of a smooth bore nozzle?

A

gpm = 29.7 x d2 x √NP

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109
Q

What is the theoretical gpm for a 1 1/8” handland?

A

266

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110
Q

What is the theoretical gpm for a 1 1/2” master stream?

A

598

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111
Q

What is the theoretical gpm for a 1 3/4’’ master stream?

A

814

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112
Q

The 1” adjustable gallonage fog nozzle is an adjustable flow nozzle that can be set to deliver between how many gpm’s?

A

12-60 gpm

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113
Q

The 2 1/2” Akron Fog Nozzle is an adjustable flow nozzle that can be set to deliver between how many gpm’s?

A

125-250 gpm

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114
Q

What is the gpm that decon showers are capable of flowing?

A

270 gpm

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115
Q

How many gpm does the penetrating nozzle flow at 100 psi

A

125 gpm

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116
Q

The 2 1/2” cellar nozzle flows how many gpm at 100 psi?

A

250 gpm

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117
Q

The 1 1/2” distributer nozzle flows 95 gpm at how much psi?

A

50 psi

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118
Q

What is the proper coefficient regarding friction loss for a 2 1/2” hose?

A

2

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119
Q

At 200 psi the County Portable Foam Eductor has a flow of what?

A

95-125 gpm

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120
Q

Most Fairfax county pumpers are rated at what?

A

1500 gpm at 150 psi pump pressure

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121
Q

A 50’ section of 1.88” contains how many gallons of water?

A

7.2 gallons

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122
Q

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

A

0.434 psi

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123
Q

What is the maximum pressure that a smoothbore hand line nozzle can be increased to?

A

65 psi

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124
Q

Akron Assault nozzles are designed to operate with what nozzle pressure?

A

50 psi

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125
Q

What is the formula used to calculate smooth bore nozzle discharge?

A

29.7 x d2 x √NP

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126
Q

Using theoretical calculations, a 1 1/8” nozzle flows what gpm?

A

266 gpm

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127
Q

Using fire ground calculations, a 1 3/8” master stream nozzle flows what gpm?

A

500 gpm

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128
Q

The 1” adjustable gallonage nozzle flows between what gpm?

A

12 to 60 gpm

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129
Q

A 2 1/2” distributor nozzle flows what gpm at 100 psi?

A

250 gpm

130
Q

What is the required pressure for a 1 3/4” break away smooth bore nozzle?

A

110 psi

131
Q

What is the required pressure when flowing 500 gpms on a Task Force Tip automatic nozzle?

A

90 psi

132
Q

What is the maximum inlet pressure when using the Mercury Monitor?

A

150 psi

133
Q

A Mercury Monitor has what size inlet and outlet?

A

2 1/2”

134
Q

What is the second principle of friction loss?

A

All variables being the same, the friction loss varies approximately with the square of the increase in the velocity of flow

135
Q

What is the friction loss coefficent for 5” hose?

A

0.08

136
Q

What is the maximum safe PDP during normal operations?

A

250 psi

137
Q

The Husky Foam system has a rated capacity of what gpm when flowing this psi

A

3 gpm at 150 psi

138
Q

All Fairfax County pumpers carry a minimum of what quantity of foam?

A

40 gallons

139
Q

Most Fairfax County pumpers are rated to flow what gpm at what psi?

A

1500 gpm at 150 psi

140
Q

Most hydrants in Fairfax County are capable of flowing what quantity of gpms?

A

1000 gpm

141
Q

What is the study of fluids at rest and in motion?

A

Hydraulics

142
Q

One cubic foot of fresh water weighs how many pounds?

A

62.5

143
Q

100’ length of 4” hose contains how many gallons of water?

A

62.25

144
Q

Using theoretical calculations how many GPM flows through a 1” smooth bore nozzle?

A

210

145
Q

The decontamination shower is used for hazardous materials incidents or to decontaminate firefighting personnel. They flow how many GPM at what PSI?

A

270 GPM / 75 PSI

146
Q

The friction loss coefficient for 1.75” hose per IFSTA is what?

A

15.5

147
Q

Over 350 GPM appliance loss is what?

A

10 PSI

148
Q

A column of water one foot high exerts a pressure of what at its base?

A

0.434

149
Q

The maximum safe discharge pressure during normal operations is what?

A

250 PSI

150
Q

The National Foam JS-10 air aspirating nozzle has a rating of what at what psi at the tip?

A

100 GPM / 100 PSI

151
Q

Fairfax County CAFS pumpers carry a minimum of how many gallons of foam?

A

40

152
Q

Pierce recommends that CAFS only be used in lines up to what length for maximum effectiveness?

A

250’

153
Q

If a 4” and a 3” supply line are used together they should be charged to a minimum starting pressure of what?

A

100 PSI

154
Q

Most Fairfax County pumpers are rated at what GPM at what PSI pump pressure?

A

1500 GPM / 150 PSI

155
Q

Two 4” supply lines has a coefficient of what?

A

0.05

156
Q

There are how many factors that will determine the correct PDP when supplying an aerial device?

A

4

157
Q

The starting pressure for all aerial devices is what?

A

150 PSI

158
Q

When drafting the driver operator should increase the throttle by what RPM or manufactures recommendation and engage primer?

A

1000 - 1200 RPM

159
Q

Any time incoming pressure exceeds what, the pump shall be operated in pump gear?

A

50 PSI

160
Q

For safety reasons, after a water supply has been established, the tank to pump valve shall be?

A

Closed

161
Q

How much does one cubic foot of fresh water weighs?

A

62.5 pounds

162
Q

Which 50’ section of hose contains 7.20 gallons of water?

A

1.88 inch

163
Q

To what pressure can a hand line with a smooth bore be increased to achieve a higher flow?

A

65 psi

164
Q

The rate at which water travels from an orifice and can be measured using a pitot gauge is?

A

Discharge velocity

165
Q

How can 3 inches be converted into feet?

A

3”/12”

166
Q

Which of this is the formula to determine volume for a rectangular/square container?

A

V=LxWxDx7.5

167
Q

What is the formula to find volume of a cylinder?

A

V=π x r² x h x 7.5

168
Q

What is the weight of water on a flat roof on a townhouse that is 30’L, 20’W and 1 1/2’ deep?

A

56,250 pounds

169
Q

Which formula is used to determine discharge?

A

29.7 x d² x √np

170
Q

What is the theoretical calculation for 15/16 tip size?

A

185

171
Q

Which tip is used when 500 gpm are flowing?

A

1 3/8”

172
Q

This type of adjustable nozzle can be set to deliver 125-250 gpm:

A

2 1/2” akron fog

173
Q

What nozzle pressure is usually the booster reel operated at?

A

100 psi

174
Q

Which device flows 270 gpm at 75 psi?

A

Decon shower

175
Q

What gpm and psi does a 2 1/2” distributor nozzle operate?

A

250 and 100

176
Q

This monitor is fixed to the pumper but can be detached and connected to a ground mount:

A

Combination

177
Q

Choose the most accurate about, all variables being the same, friction loss will vary directly with the length of the hose/pipe?

A

1st principle of friction loss

178
Q

What is the 4th principle of friction loss?

A

Friction loss is independent of pressure

179
Q

What is the friction loss in 500’ of 3” supplying a mercury monitor?

A

100 psi

180
Q

For how long can the CAFS compressor be operated without overheating?

A

2 hours

181
Q

One cubic foot contains how many cubic inches?

A

1728

182
Q

One gallon contains how many cubic inches?

A

231

183
Q

A 50’ length of 1.88” hose contains how many gallons of water?

A

7.2

184
Q

A 50’ length of 3” hose contains how many gallons of water?

A

18.35

185
Q

Smooth bore handline pressure can be increased to what PSI for a higher flow?

A

65 psi

186
Q

How many GPM does a handline tip size of 1 1/4” flow? (Theoretical)

A

328 gpm

187
Q

How many GPM does a master stream flow with a tip size of 1 3/8”? (Theoretical?

A

502 gpm

188
Q

The 2 1/2” cellar nozzle flows how many GPM and at what PSI?

A

350 gpm, 100 psi

189
Q

What is the tip size of the smooth bore nozzle used on the Akron Quick-Attack Mercury Monitor?

A

1 3/8”

190
Q

What is the maximum inlet pressure for the Mercury Monitor?

A

150 psi

191
Q

What is the term referred to the pressure remaining in a water system when water is flowing?

A

Residual pressure

192
Q

What is the maximum safe PDP?

A

250 psi

193
Q

What is the flow of a 1” adjustable gallonage fog nozle?

A

12-60 GPM

194
Q

Decon showers flow how many GPM’s at 75 PSI?

A

270

195
Q

The 1 1/2” distributer nozzle flows how many GPM at 50 PSI?

A

95

196
Q

The portable foam eductor flows 95-125 GPM with a pump disharge pressure of what?

A

200 PSI

197
Q

Most Fairfax County pumpers are rated at what GPM at 150 psi?

A

1500 gpm

198
Q

What is the coefficient for using one 4” and one 3” line?

A

0.09

199
Q

When drafting, what is the RPM range to set at the pump panel?

A

1000-1200 RPM

200
Q

In relay operations, if a 4” and 3” supply line are used together, what should the starting pressure be?

A

100 PSI

201
Q

One gallon of fresh water weighs how many pounds?

A

8.33

202
Q

One cubic foot of fresh water weighs how many pounds?

A

62.5

203
Q

What is the standard nozzle pressure for attack lines in Fairfax County?

A

50 psi

204
Q

Master streams have a high caliber water flow they are considered to flow over what GPM?

A

350 gpm

205
Q

The Akron assault nozzles are equipment with a smooth bore slug that flows what?

A

185 gpm

206
Q

The fairfax County approved decon shower flows what GPM?

A

270 gpm

207
Q

A 2 1/2 distributor flows what GPM?

A

250 gpm

208
Q

The 1 1⁄2” cellar nozzle flows what GPM?

A

160 gpm

209
Q

Task Force Tip automatic nozzle has a max flow of?

A

1250 gpm

210
Q

Maximum inlet pressure for the Mercury Monitor is?

A

150 psi

211
Q

What is the coefficient for 3’’ hose?

A

0.8

212
Q

What is the coefficient for dual 3’’ lines?

A

0.2

213
Q

What is the appliance loss used when flowing more then 350 GPM?

A

10 psi

214
Q

What pressure and what GPM does the JS-10 nozzle use to operate correctly?

A

100psi/100 gpm

215
Q

Fairfax County Portable Foam Eductor’s flow what GPM?

A

95 to 125 gpm

216
Q

What is the operating pressure for the in line foam eductor?

A

200 psi

217
Q

What is the max height the nozzle can be above the in line foam eductor?

A

5 feet

218
Q

When operating at a fire and using CAFS for is the application rate for Class A foam?

A

0.30%

219
Q

Pierce recommends that CAFS only be used in lines up to?

A

250’

220
Q

Combination fire department systems should be flowed at what standard operating pressure?

A

150 psi

221
Q

How much water is in one cubic foot?

A

7.5 gallons

222
Q

If a 100’ length of 4” hose contains 65.25 gallons of water, how much does that section of hose weigh?

A

543.53 lbs

223
Q

What type of pump takes advantage of the incoming water pressure?

A

Centrifugal Pump

224
Q

For each foot of elevation above the pump, the pressure increases by how much?

A

0.434 psi

225
Q

What is the formula for determining the volume of a rectangular or square shaped container?

A

LWD*7.5

226
Q

How much does one cubic foot of water weigh?

A

62.5 lbs

227
Q

What is the square root of the nozzle pressure of a master stream smooth bore?

A

8.94

228
Q

When determining flow from a smooth bore nozzle, what is the mathematical constant derived from a round opening?

A

29.7

229
Q

What is the operating range of master stream fog nozzles?

A

150-2000 gpm

230
Q

What is the flow of the decontamination showers used for hazmat incidents?

A

270 gpm

231
Q

While flowing 125 gpm, what is the nozzle pressure for piercing nozzles?

A

100 psi

232
Q

What is the maximum inlet pressure for the Mercury Monitor?

A

150 psi

233
Q

When calculating pump discharge pressure, what is the appliance loss for the Mercury Monitor?

A

10 psi

234
Q

What does doubling the length of hose do to friction loss?

A

doubles it

235
Q

When calculating an attack pumpers PDP, what is calculated for Total Pressure Loss (TPL)?

A

Friction Loss, Appliance Loss, Elevation Pressure

236
Q

What is the purpose of positioning the inline foam eductor 50’ from the pumper?

A

prevent turbulance

237
Q

How long can the CAFS air compressor be operated without overheating?

A

2 hours

238
Q

When using CAFS, which nozzle creates the best finished foam product for fire attack?

A

15/16” smooth bore

239
Q

What is the starting pressure for all 4” supply lines when operating in a relay?

A

50 psi

240
Q

What is the coefficient for dual 4” lines?

A

0.05

241
Q

what is the rating of JS-10?

A

100gpm at 100psi

242
Q

what is a JS-10 not equipped with?

A

a bale

243
Q

how far must a eductor from panel and nozzle, according to the manual?

A

50ft and 200ft

244
Q

what does cafs stand for?

A

compressed air foam system

245
Q

what is the minimum starting pressure of 4 inch supply lines should be charged at?

A

50psi

246
Q

what is the minimum starting pressure of 3 inch supply lines should be charged at?

A

100psi

247
Q

what should supply pumpers (under normal circumstances ) not do to their discharges?

A

gate down

248
Q

what does 10% mean using percentage drop for a hydrant ?

A

3x the amount

249
Q

what the appliance loss for standpipe?

A

25 psi

250
Q

what starting pressure for sprinkler connections at fdc?

A

150psi

251
Q

what starting pressure for a combination fdc connection?

A

150psi

252
Q

who orders do you charge aerial apparatus with water?

A

aerial driver or officer

253
Q

what must happen after using aerial master stream and lowering?

A

must open drains or nozzle

254
Q

what rpm does the manufacture recommend for using the primer?

A

1000-1200rpm

255
Q

what intake should be used for drafting?

A

side intake

256
Q

how many maximum gpm from drafting does front intake get?

A

900gpm

257
Q

why does the front intake get the least amount of gpm during drafting?

A

amount of curves in the piping

258
Q

anytime pressure exceeds 50 psi coming in, what must happen ?

A

be in pump gear

259
Q

what does a de on shower flow at?

A

270 gpm at 75 psi

260
Q

what does a piercing nozzle flow at?

A

125gpm at 100 psi

261
Q

One cubic foot contains 


A

1728 cubic inches

262
Q

One cubic foot contains 


A

7.5 gallons

263
Q

One cubic foot of fresh water weighs

A

62.5 pounds

264
Q

One gallon contains 


A

231 cubic inches

265
Q

One gallon of fresh water weighs 


A

8.33 lbs

266
Q

A column of water 1’ high exerts a pressure of 


A

0.434 psi at its base 


267
Q

A column of water 2.304’ high exerts a pressure of 


A

1 psi at its base

268
Q

50’ length of 1.75” hose contains 


A

6.24 gallons of water

269
Q

50’ length of 1.88” hose contains 


A

7.2 gallons of water

270
Q

50’ length of 2.5” hose contains 


A

12.74 gallons

271
Q

50’ length of 3” hose contains 


A

18.35 gallons

272
Q

100’ length of 4” hose contains 


A

65.25 gallons

273
Q

100’ length of 5” hose contains 


A

101.94 gallons

274
Q

Nozzle pressure for hand lines with smooth bore nozzles is 


A

50 psi

275
Q

Nozzle pressure for master streams with smooth bore nozzles is 


A

80 psi

276
Q

Akron Assault nozzles flow 


A

175 gpm

277
Q

The nozzle pressure for all other fog nozzles is 


A

100 psi

278
Q

The formula for determining volume for a rectangular or square shaped container is: Capacity in gallons

A

L’ x W’ x D’ x 7.5

279
Q

The formula to determine the volume of a cylinder, pipe, or hose in gallons is: Capacity in gallons

A

π x r2 x H’ (or L’) x 7.5 gallons

280
Q

Determining the flow from a smooth bore nozzle can be computed by using the formula for gallons per minute when the nozzle pressure is known

A

29.7 x d2 x sqrt NP


281
Q

When performing fire ground math and a number has multiple numbers after the decimal point, what should you do?

A

Round up to 2 decimal places

282
Q

The formula for determining volume of a rectangular or square shape is ?

A

Length x width x depth x 7.5

283
Q

What is the number for π?

A

3.14

284
Q

What is a hand line PSI?

A

50

285
Q

What is PSI for a master stream?

A

80

286
Q

The Mercury Monitor flows how many GPM?

A

500 GPM

287
Q

Booster reels have a PSI of ?

A

100

288
Q

What do you pump the forestry hose at?

A

100 PSI

289
Q

A piercing nozzle is at what GPM and PSI?

A

125 and 100

290
Q

A cellar nozzle with 2 1/2” hose has a GPM of what?

A

350

291
Q

What is the appliance loss for a Mercury Monitor?

A

10

292
Q

Per Fairfax County what is the coefficient for 1 3/4” hose?

A

10

293
Q

The JS-10 nozzle flows what GPM at what PSI?

A

100 and 100

294
Q

The foam eductor need to be how far from the pump?

A

50’

295
Q

What is the PSI of the foam eductor?

A

200

296
Q

When preparing to draw a prime what should the RPM’s be at?

A

1000 - 1200

297
Q

A column of water 1’ high has a pressure of ?

A

0.434

298
Q

1 cubic foot of water has how many gallons?

A

7.5

299
Q

A 50’ length of 1.88” hose holds how much water?

A

7.2 Gal

300
Q

What is the GPM that divides hand lines from master streams?

A

350

301
Q

What is the study of fluids at rest?

A

Hydraulics

302
Q

How much does one cubic foot of fresh water weigh?

A

62.5 pounds

303
Q

How many cubic inches are in one cubic foot?

A

1,728

304
Q

How much does one gallon of fresh water weigh?

A

8.33 pounds

305
Q

A 50’ length of 1-3/4” hose contains how may gallons of water?

A

6.24

306
Q

A 50’ length of 1.88” hose contains how may gallons of water?

A

7.2

307
Q

A 50’ length of 2-1/2” hose cantains how many gallons of water?

A

12.74

308
Q

A 50’ length of 3” hose cantains how many gallons of water?

A

18.35

309
Q

A 100’ length of 4” hose cantains how many gallons of water?

A

65.25

310
Q

How many GPM do our Akron Assault nozzles flow using the fog tip?

A

175

311
Q

How many GPM do our Akron Assault nozzles flow using the 15/16” slug?

A

185

312
Q

What is the nozzle pressure for hand lines with smooth bore nozzles?

A

50

313
Q

What is the nozzle pressure for master streams with smooth bore nozzles?

A

80

314
Q

How many GPM does the Akron Quick-Attack Mercury monitor flow?

A

500

315
Q

What is your appliance loss when flowing less than 350 GPM?

A

0

316
Q

What number do we use on the fire ground for calculating elevation pressure?

A

5

317
Q

The Husky Foam Systems are able to inject foam at what percent?

A

0.1% - 3%

318
Q

What is the starting pressure when using both 3” and 4” supply lines at the same time?

A

100

319
Q

What limits the maximum amount of water being delivered to the fire scene in a relay operation?

A

The water source and the pumping capacity of the smallest pumper

320
Q

What is the starting pressure for a standpipe?

A

150

Martin 22 (33 decks)

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