Pump Class notes Flashcards
1
Q
When length of hose is doubled FL is ______?
A
- Doubled
2
Q
When flow is doubled FL is _______?
A
- Squared
3
Q
Chimney nozzles are designed to flow ____ gpm at 100 psi at the tip.
A
- 3-5 gpm
4
Q
Smooth bore 1” hand line at 50 psi flows about ____gpm?
A
- 210 gpm
5
Q
If the hose diameter is doubled the opening are is ___?
A
- X4
6
Q
Main Sizes
- Residential
- Commercial
A
- 6” min
- 8” min
7
Q
Fire rated pump
A
- 750 gpm
- Pressure relief device
- Front-mount, Engine driven, or transfer driven
( Midship, or Rear mount)
8
Q
Nozzles
- Solid bore, not mounted
- Solid bore, apparatus mounted
- And Broken Stream (fog)
- FDC
- Master streams and stand pipes
A
- 50 psi
- 80 psi
- 100 psi
- 150 psi, unless otherwise posted
- add 25 psi
9
Q
Nozzle Reaction
A
- Pressure felt while flowing water, reaction is normally half of the gpm.
- NR Q/3 for solid stream
- NR Q/2 for fog
Newton’s 3rd law- for every action there is an equal and opposite reaction.
10
Q
Primary feeders
A
- Large mains that carry large quantities of water to a town
11
Q
Secondary feeders
A
- Smaller mains that carry water to smaller areas
12
Q
Distributors
A
- Smallest pipes carry water to users and hydrants
13
Q
Loop system
A
- System that is supplied by multiple lines
14
Q
Dead end water mains
A
- Supply water from only one direction
15
Q
Grid
A
- Supplied by multiple lines in a grid like system
