Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Driver > math > Flashcards

math Flashcards

1
Q

Friction loss for RAM

A

75 psi if flowing 500 gpm

50 psi if flowing 400 gpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Preferred hose size for RAM

A

3”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Find Available Water

A
  1. static reading
  2. note drop after first line
    3 multiply drop by square of the velocity t o se if original flow may be doubled, triple, ect.
  3. subtract total drop from original static pressure
  4. product of #3 and your original flow rate will determine flow
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Minimum Hydrant Residual Pressure on Compound gauge?

A

20 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

PSI for a standpipe system

A

25 psi for FDC and riser

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

PSI for a sprinkler system

A

150 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Calculate relay operations

A

flow relay plus 20 psi for residual pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Maximum pressure flucuation

A

10 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Siamese Hoselines, master stream ground monitor

A

25 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

calculate wyed hoselines

A

10 psi for the wye if flowing 350 gpm or greater

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Master steams appliances

A

add 25 psi for master steam devices

Fog- 100 psi
solid stream- 80 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Elevation psi

A

add 5 psi for each flow excluding first or 5 psi per 10’ of elevation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

GPM Parameters- Solid Stream

Master streams

A 
Master steams (80 psi nozzle pressure)
1 1/4"   400 gpm
1 3/8"   500 gpm
1 1/2"   600 gpm
1 5/8"   700 gpm
1 3/4"   800 gpm
1 7/8"   900 gpm
2"   1000 gpm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

GPM Parameters- solid stream

Hand lines

A

Hand lines (50 psi nozzle pressure)
1” 200 gpm
1 1/8” 250 gpm
1 1/4” 300 gpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Unequal Size lines 2 1/2” and 3”

A 
total Gpm-  FL- 100 ft.
500-  10 psi
600-  15 psi
700-   20 psi
800-   25 psi
900-   30 psi
1000-  35psi
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

3” skidload

A

Fog nozzle-
90 psi + 6 psi per 100’ of 3”

Smooth nozzle-
70 psi + 9 psi per 100” of 3”

17
Q

2 1/2” skidload

A

Fog nozzle-
135 psi + 7 psi per 100’ of 2 1/2”

Smooth nozzle-
125 psi + 10 psi per 100’ of 2 1/2”

18
Q

2 1/2” preconnect pressure and gpm

A

200” of preconnect
Fog- 250 gpm at 105 psi
Smooth- 300 gpm at 90 psi

19
Q

1 3/4” Preconnect pressure and gpm

A

200’ of preconnect
Fog- 175 gpm at 155 psi
Smooth- 200 gpm at 150 psi

20
Q

3” hose pressure

A 
Q squared
175 gpm- 3 psi
200 gpm- 4 psi
250 gpm- 6 psi
300 gpm- 9 psi
350 gpm- 12 psi
400 gpm- 16 psi
500 gpm- 25 psi
600 gpm- 36 psi
21
Q

2 1/2” hose pressures

A 
Subtract 10 method from Q
175 gpm- 7 psi
200 gpm- 10 psi
250 gpm- 15 psi
300 gpm- 20 psi
350 gpm- 25 psi
400 gpm- 30 psi
500 gpm- 40 psi
22
Q

1 3/4” hose pressure loses

A

175 gpm- 40 psi

200 gpm- 50 psi

23
Q

Friction loss fomula

A

FL= CQ2L

2 is squared

24
Q

R.A.M for 100’ of both 3” and 2 1/2”

A

500 GPM- 25 psi for 3” (each 100’) and 75 psi for the RAM= 100 psi

400 GPM- 30 psi for the 2 1/2” (each 100’) and 50 psi for the RAM= 80 psi

Driver (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions