Ifsta Chapter 6

Question 1

Which of the following is not one of the three basic fire streams as defined by IFSTA?

Answer 1

A) broken
B) solid
C) piercing the Correct answer
D) fog
Source: IFSTA Ch. 06, Page 193, Author: Brendel

Question 2

What are the two factors that determine the reach and flow of a solid stream?

Answer 2

nozzle pressure and size of the discharge orifice determine the flow and
reach of a solid stream.

Question 3

Formula 6.1 (Customary) - Discharge Rate

Answer 3

GPM = 29.7 x d2 x √NP
Where: GPM = Discharge in gallons per minute (gpm)
29.7 = A constant
d= Diameter of the orifice in inches (in)
NP = Nozzle Pressure in pounds per square inch (psi)

Question 4

What is considered a “narrow fog” nozzle pattern according to IFSTA?

Answer 4

) 15 to 45 degrees

Question 5

wide fog

Answer 5

45-80 degrees

Question 6

Which of the following is not a master stream appliance as defined by IFSTA?

Answer 6

A.)Fixed monitor
B.)Combination Monitor
C.) Portable Monitor
D.) Elevated Master stream

Question 7

maximum flow for a handline

Answer 7

350 gpm

Question 8

flow for a master streams

Answer 8

350 gpm and greater

Question 9

Smooth bore master stream nozzle pressures

Answer 9

80 psi

Question 10

Fog nozzle master stream nozzle pressures

Answer 10

100psi

Question 11

Master Stream Appliances

Answer 11

Fixed Monitor, Combination monitors, Portable monitors

Question 12

What is the best method to increase safety and effectiveness of a cellar nozzle?

Answer 12

insert an inline shutoff valve

Question 13

Counterforce directed against a person holding a nozzle or a device holding a nozzle by the velocity of water being discharged.

Answer 13

Nozzle Reaction

Question 14

Nozzle Reaction for Solid Stream Nozzles

Answer 14

NR = 1.57 x d2 x NP
NR = Nozzle Reaction in pounds (lb)
1.57 = A constant
d= Nozzle diameter in inches (in)
NP = Nozzle Pressure in pounds per square inch (psi)

Question 15

Nozzle Reaction for Fog Stream Nozzles

Answer 15

NR= 0.0505 x Q x √NP
NR= Nozzle Reaction in pounds (lb)
0.0505 = A constant
Q= Total flow through the nozzle in gallons per minute (gpm)
NP = Nozzle Pressure in pounds per square inch (psi)

Question 16

Determine the nozzle reaction from a 1 3/4 hoseline equipped with a akron fog nozzle tip operating a nozzle at
50PSI

Answer 16

62.5 lbs

Question 17

Determine the nozzle reaction of a hoseline with a fog nozzle flowing 200 gpm and 100 psi.

Answer 17

101 lb

Question 18

which nozzle type allows the firefighter operating the hoseline to select the flow rate?

Answer 18

selectable gallonage nozzle

Question 19

MOST fog nozzles are designed to be operated at:

Answer 19

100 psi

Question 20

Automatic nozzles are categorized as what kind of nozzle?

Answer 20

) variable flow nozzle