*TB 103- Foam Dispensing Equipment

Question 1

Hydro foam equipment:

What is the proportioned mixture of class B foam used in the hydro foam system?

Answer 1

3%

Question 2

Hydro foam equipment:

The foam concentrate inlet on the Hydro-Foam nozzle includes an ___ft reinforced clear plastic “pigtail” with 1-1/2” NST swivel inlet

Answer 2

8’

Question 3

Class “A” foam will increase the effectiveness of water by ___ to ___ times more.

Answer 3

3 to 5

Question 4

When applying Class B foam, at least ___% of the stream flow should land on the flammable liquid within a well-defined, compact, elliptical area or footprint.

Answer 4

80%

Question 5

Class ___ foam forms a blanket over flammable liquids, sealing flammable vapors under the foam.

Answer 5

B

Question 6

The Hydro-Foam Nozzle is of the non-______ type

Answer 6

Aspirating

Question 7

The Hydro-foam nozzle will produce the optimum Class “B” foam range from ____ to ____ ratio.

Answer 7

3:1 to 6:1 ratio

Question 8

Hydro-Foam Nozzles can operate effectively at low nozzle pressures, ___ psi or less.

Answer 8

75

Question 9

What is the GPM and Inlet pressure for the Hydro-Foam nozzle?

Answer 9

660 gpm and 100 psi inlet

Question 10

Hydro-Foam nozzle:

Does the 1-1/2” foam inlet need to be capped during non-foam operations?

Answer 10

No

Question 11

Hydro-foam nozzle and JRC:

What is the max amount of 1-1/2” hose that can be used from the JRC to the hydro-foam nozzle “pigtail”?

Answer 11

1000 ft

Question 12

Hydro-foam equipment:

Expect to use ___ gallons of concentrate per minute of operation while water is flowing with the hydro-foam nozzle.

Answer 12

20

Question 13

1-1/2” in-line foam eductor:

Whether 1-1/2” or 1-3/4” hose is used, the ___ gpm spray tip MUST always be used.

Answer 13

125 gpm

Question 14

The Task Force Tips Bubble Cup spray tip has a flow range of ___ or ___ gpm

Answer 14

10/40 gpm

Question 15

The Bubble Cup spray tip is capable of producing aspirated foam, with an expansion ratio of ___:1, as well as conventional straight stream and wide protective fog pattern

Answer 15

8

Question 16

How do you set the Bubble Cup spray tip in aspirating mode?

Answer 16

Slide the grey sleeve portion of the spray tip forward.

When the sleeve is in the fully extended position, a white line on the shaper will be visible at the base of the gray sleeve

Question 17

Foam dispensing equipment:

Tests have demonstrated that air bubbles burst when exposed to temperatures in the range of ___ degrees Fahrenheit

Answer 17

170°

Question 18

Foam dispensing equipment:

Foam blankets breakdown ___ to ___ minutes following application.

Answer 18

15 to 30 min

Question 19

Bubble Cup spray tip:

An application rate of ___% to ___% will provide a much dryer foam. This is used for direct initial attack on fine fuels, deep-seated fires and mop up.

Answer 19

0.3 to 0.6%

Question 20

Bubble Cup spray tip:

An application rate of ___% to ___% will provide a wet foam. A wet foam is a watery foam that is runny on vertical surfaces, fast draining, and has a great variation in bubble size. This is used for immediate penetration into dry fuels, on deep-seated fires and mop up.

Answer 20

0.1 to 0.3%

Question 21

Bubble Cup spray tip:

An application rate of ___% up to ___% will offer shaving cream consistency and medium-to-small bubble structure. It clings readily to vertical surfaces, makes foam barriers for exposures (similar to Thermo Gel application) and wet lines that will hold over ___ minutes.

Answer 21

• 0.6 to 1%

* 30 min

Question 22

Hydro foam equipment:

What is the Stream Range (straight stream) of the hydro foam nozzle?

Answer 22

180’