Ch 6 Nozzles And Flow Rates.

Question 1

The fire part ice operates three types of nozzles.

Answer 1

Solid fog and broken

P. 193

Question 2

Discharge rate formula for solid stream

Answer 2

Gpm =29.7x D2 x NP(square root)

29.7 is the constant
D squared is the size tip being used
Np used the nozzle pressure in psi. Square root the nozzle pressure before multiplying the rest of the numbers.

P. 195

Question 3

Nozzle reactions for solid stream

Answer 3

NR = 1.57 x D2 x NP 
 1.57 is the constant 
D2 is the size of tip being used 
NP is the nozzle pressure in psi 
 Answer is in lbs 

P. 203

Question 4

Fire ground nozzle reaction for solid stream

Answer 4

NR = Q/3
Q equals the total flow of water in gpm through the nozzle.

P. 203

Question 5

Nozzle reactions from a fog stream

Answer 5

NR= .0505 x Q x NP (square root)

.0505 is the constant
Q is the gpm
NP is the nozzle pressure in psi
Find the square root of NP before working the rest of the problem.

Answer is in lbs

P. 204

Question 6

Fire ground nozzle reaction for fog stream.

Answer 6

NR=Q/2
Q is flow in gpm

P. 204