Pumps & Pumping

Question 1

Friction loss equation

Answer 1

FL= CO X Q* X L

Q/100
L/100

Question 2

Flow rates

1. 5”
2. 75”
3. 5”

Answer 2

60-125 GPM. 1.5” Apartment Pack

120-180 GPM. 1.75”
Cross Lay/ bumper Line/ trash Line

250 GPM 2.5” Cross Lay

Question 3

E-4 IGPM

Answer 3

1250 IGPM

Question 4

E-4 Water Tank Capacity

Rosenbauer Engine

Answer 4

446 Gallons

Question 5

Coefficients for Friction Loss

Answer 5

24 1.5”.

15.5 1.75”

2 2.5”

.2 4”

Question 6

Master Stream GPM

Answer 6

250 - 1250 GPM

Question 7

Master Stream psi/rpm for 1000GPM

Answer 7

psi 140

RPM 1100

Question 8

Master Stream Combination Nozzle psi

Answer 8

100 psi

140 PDP psi

Question 9

Relay Pumping should be utilized when?

Answer 9

C.   Commercial 
 I.    Industrial 
A.    Aerial 
5.    500 gpm or more
2.    200' or more of supply hose

Question 10

Fire Pump Rating

Answer 10

100% @. 150psi

70% @. 200psi

50% @. 250psi

Question 11

Non Calculated relay pumping
Start psi
Maximum psi

Answer 11

175 psi Start

200 psi Max

Question 12

Terminating a relay pump

Answer 12

• Attack pumper shuts down first.
• Leave some lines open to avoid pressure variances
• Ensure pumper is full

Question 13

Master stream friction loss for 350gpm or less

Answer 13

10 psi

Question 14

Master stream friction loss for 500gpm or more.

Answer 14

25 psi

Question 15

Truck mounted master stream smooth bore operating pressure

Answer 15

80 psi

Question 16

How much head pressure per foot

Answer 16

.434psi

Question 17

1” Vacuum of Mercury at s a level will produce how much lift?

Answer 17

1” = 1.13’

Question 18

How many feet of head pressure is required to produce 1 psi

Answer 18

2.304 psi

Question 19

How do you work out Theoretical lift at sea level?

Answer 19

1 psi pressure = 2.304 psi

        2.304 psi
    X14.7     sea level psi
--------------------------------------
       33.86 '   
Theoretical lift at sea level

Question 20

10” Mercury is equivalent to —– lift

Answer 20

11.3’

Question 21

Standpipe pumping psi

Answer 21

Starts at 150 psi

Question 22

Sprinkler pumping starting psi

Answer 22

150 psi

Question 23

Pre-connects 75 psi Nozzle
1.75”
150’ PDP
200’ PDP

Answer 23

150’ / 95gpm = 95psi PDP

200’ / 95gpm = 100psi PDP

Question 24

PDP for the 2.5” pre-connect @ 125gpm

Answer 24

PDP = 2.5” 125gpm 81 psi

Question 25

PDP for the 2.5” pre-connect @ 250gpm

Answer 25

PDP = 100psi

Question 26

1.75” FL =

Answer 26

7 psi/ 50’

Question 27

2.5” FL =

Answer 27

1psi/50’

Question 28

Pierce Engine 2 water tank capacity

Answer 28

394 Gallons

Question 29

Cavitation while pumping troubleshooting

Decrease RPM

Answer 29

Need more supply

Gate back hoses