Engineers Test

Question 1

2 1/2” Smoothbore Tip Sizes

Answer 1

1” = 1.000 | 1 1/8” = 1.125 | 1 1/4” = 1.250

Question 2

Master Stream Stacked Tip Sizes

Answer 2

1 3/8” = 1.375 | 1 1/2 = 1.500 | 1 3/4” = 1.750 | 2” = 2.000

Question 3

2 1/2” Smoothbore GPMs

Answer 3

1” = 210gpm | 1 1/8” = 267gpm | 1 1/4” = 330gpm

Question 4

Master Stream Stacked Tip GPMs

Answer 4

1 3/8” = 505gpm | 1 1/2” = 600gpm | 1 3/4” = 800gpm | 2” = 1000gpm

Question 5

1” Hose Coefficient

Answer 5

150

Question 6

1 1/2” Coefficient

Answer 6

24

Question 7

1 3/4” Hose Coefficient

Answer 7

15.5

Question 8

2 1/2” Hose Coefficient

Answer 8

2

Question 9

3” Hose Coefficient

Answer 9

0.8

Question 10

5” Hose Coefficient

Answer 10

0.08

Question 11

Nozzle Pressures

Answer 11

Fog Nozzle = 150 psi
Solid Stream = 50 psi
Master Stream = 80 psi

Question 12

Friction Loss Calculations

Answer 12

FL = C x Q(squared) x L
100. 100
Friction Loss = Coefficient x Quantity (squared) x Length

Question 13

Elevation Pressure Calulations Formula

Answer 13

0.5H = EP

5 psi x (Number of stories -1)

Question 14

PDP (Pump Discharge Pressure) Formula

Answer 14

PDP = NP + TPL

PDP = Nozzle Pressure + Total Pressure Loss

Question 15

Pressures

Answer 15

Atmospheric
Head
Static
Normal Operating
Residual
Flow

Question 16

PSI for FDCs

Answer 16

150psi

Question 17

Hose Testing

Answer 17

5” 300’ @ 200 psi for 5 mins

all other hose 300’ @ 250 psi for 5 mins

Question 18

Hose length and pressure for foam

Answer 18

1 3/4” hose @ 300’ max

eductor operated @ 200 psi

Question 19

Weight Limits for Platforms

Answer 19

1000 # w/o waterflow

500 # w/ waterflow

Question 20

Means of moving water in Distribution systems

Answer 20

Direct pumping
Gravity System
Combintation System

Question 21

Appliance Friction Loss

Answer 21

0 psi when flowing less than 350 gpm
10 psi when over 350 gpm
25 psi for all master stream devices regardless of flow

Question 22

Static Pressure

Answer 22

Pump is connected to a hydrant and IS NOT discharging water

Question 23

Residual Pressure

Answer 23

Pump is connected to a hydrant and IS discharging water

Question 24

Atmospheric Pressure

Answer 24

Pressure exerted by the atmosphere at the surface due to the weight of air

Question 25

Head Pressure

Answer 25

Water pressure due to elevation (0.434 x height in feet)

Question 26

Flow Pressure

Answer 26

Pressure created by the rate of flow or velocity of water coming from a discharge opening

Question 27

SOP - At no time shall PDP exceed ______ PSI when pumping LDH

Answer 27

175 psi

Question 28

What are the two general types of sprinkler coverage?

Answer 28

Complete & Partial

Question 29

What are the major applications of sprinkler systems?

Answer 29

``` Wet Dry Preaction Deluge Residential ```

Question 30

What are the different types of indicator valves?

Answer 30

Outside Stem & Yoke (OS+Y) Post Indicator Valve (PIV) Wall Post Indicator Valve (WPIV) Post Indicator Valve Assembly (PIVA)

Question 31

Sprinkler Head Types

Answer 31

Pendant Upright Sidewall Special Purpose

Question 32

How many lines can you add for Intake drop of 10% or less

Answer 32

5 lines of same size

Question 33

How many lines can you add for intake drop of 10% - 20%

Answer 33

4 lines of same size

Question 34

How many lines can you add for intake drop of 20% - 30%

Answer 34

3 lines of same size

Question 35

How many lines can you add for intake drop of 30% - 40%

Answer 35

2 lines of same size

Question 36

How many lines can you add for intake drop of 50% or more

Answer 36

1 line of same size

Question 37

What are the GPM Ratings of our trucks

Answer 37

All Engines except E3 - 1500 GPM E3 - 2000GPM P1 - 1750GPM P2 - 2000GPM

Question 38

How is the GPM of the truck determined

Answer 38

based on gpms flowed from static draft