TB 103 Foam Dispensing Equipment

Question 1

Class A form reduces ___

Answer 1

the surface tension of water

Question 2

Class A form will increase the effectiveness of water by ___

Answer 2

3 - 5 times more

Question 3

Class B foam forms a ___

Answer 3

blanket over flammable liquids, sealing flammable vapors under the foam.

Question 4

When applying class B for at least ___ should land on the flammable liquid

Answer 4

80%

Question 5

Hydro-Foam nozzle is of the __

Answer 5

non aspirating type

Question 6

This design entrains less air into the

Answer 6

foam solution

Question 7

Hydro Foam nozzle produces high-quality foam that expands to the optimum Class B range from

Answer 7

3:1 to 6:1

Question 8

HF nozzle operating #s

Answer 8

100 PSI at 660 GPM

Question 9

Foam concentrate inlet on HF nozzle includes an

Answer 9

8’ reinforced clear plastic pigtail with 1 1/2 for connection to fire hose and nozzle

Question 10

Jet Ratio Controller

Answer 10

Uses a small amount of water, passing through a high efficiency venturi type device to move foam concentrate from a remote storage location.

Question 11

Inline foam educator, Task force tips mixture ranges

Answer 11

0.5% to 6%

Question 12

Inline foam educator: pump

Answer 12

200 psi

Question 13

Why do you pump 200 psi?

Answer 13

Inlet pressure is reduced as it passes through the venture inside the educator. pressure is reduced to 130 psi

Question 14

Bubble cup spray trip is capable of producing an aspirated foam with an expansion ratio of

Answer 14

8:1

Question 15

To use the aspirating feature…

Answer 15

slide the gray sleeve portion of the spray tip forward

Question 16

Class A form are mixed with air and water to produce air bubbles in a process called ____

Answer 16

aeration

Question 17

Aerated foam solution increases the surface area of the liquid therefore ___

Answer 17

increasing the heat absorptive capability

Question 18

Air bubbles burst when exposed to temperatures in the range of

Answer 18

170 degrees

Question 19

Foam blankets break down ___

Answer 19

15 to 30 minutes

Question 20

Foam 0.1% to 03% will ___

Answer 20

provide a wet foam

Question 21

Foam 0.3% to 0.6% will provide ___

Answer 21

a much dryer foam, use on fine fuels, deep seated fires and mop up

Question 22

Foam 0.6% to 1% will __

Answer 22

offer only minimally more foam quantity but will provide more surfactant in the bubble shell. Hold over 30 minutes