TB 27 Aqueous Film Forming Foam (Light Water)

Question 1

“Light Water” brand AFFF concentrate, ____, is for use with flow-proportioning equipment.

Answer 1

FC-200

Question 2

Light water is a synthetic foam forming liquid designed for use with ____.

Answer 2

sea water or fresh water.

Question 3

It is designed to be mixed in a volume proportion of __ concentrate to 94 percent water, or approximately ___ of concentrate to ____ of water.

Answer 3

six percent / one gallon / 16 gallons

Question 4

Light water is a chemical compound containing ____.

Answer 4

fluorine, hydrogen and carbon

Question 5

It is an amber colored liquid that is a surfactant, i.e. having the “unique ability to make water __ on flammable fuels which are lighter than water”.

Answer 5

float

Question 6

Light water is more than __ times as effective than that of protein type foams on open surface gasoline fires.

Answer 6

three

Question 7

Extinguishes and protects fuels from reignition at an efficiency level of as much as ____ of burning fuel per gallon of ____.

Answer 7

40 square feet / six percent solution.

Question 8

Handlines

Lay out sufficient 1inch hose to reach objective. Attach 1 inch shut-off butt. Attach _____ to shut-off butt.

Answer 8

American La France #600 foam nozzle

Question 9

Handlines
Supply 100 p.s.i. to the nozzle. This will provide an effective reach of ____, dispensing ____ of agent in one minute and ten seconds.

Answer 9

50 feet with 60 gpm / five gallons

Question 10

Alternate method - the foam inlet and pick-up tube are provided with a _____ thread.

Answer 10

3/4 inch garden hose

Question 11

The pick-up tube can be extended with a 3/4 inch garden hose up to ___ if the couplings are in good condition and do not leak air.

Answer 11

50 feet

Question 12

The eductor should not be more than___ above the foam supply or a weak mixture will result.

Answer 12

five feet

Question 13

Wagon Battery Operation:

1. Remove barrel and nozzle tip from battery.
2. Attach ___ reducer.

Answer 13

2inch to 1inch

Question 14

Wagon Battery Operation:

3. Attach American La France #600 foam nozzle to battery.
4. Insert pick-up tube in can and start water flowing.
5. Supply ____ to the nozzle. This will provide an effective reach of ____ and 75 gpm.

Answer 14

100 p.s.i. / 65 feet

Question 15

Premix in the tank:

This method should ___ be used if application can be achieved another way.

Answer 15

not

Question 16

Premix in the tank:

The detergent action of light water ____ pump packing resulting in pump leakage and possible damage to the pump shaft.

Answer 16

degreases

Question 17

Premix in the tank:

This method may be necessary if ____ are needed, or for streams from an aerial ladder.

Answer 17

two lines

Question 18

Premix in the tank:

1. Drain approximately ___ of water from a full 400 gallon tank.

Answer 18

fifty gallons

Question 19

Premix in the tank:

2. Pour ____ of light water into tank.

Answer 19

24 gallons

Question 20

Premix in the tank:

Alternate method - Attach 1inch shut-off butt with spray tip set at ___. Provide 75 p.s.i. nozzle pressur

Answer 20

30° cone

Question 21

Maintenance:

1. ____ the pump and hose thoroughly with fresh water after use.

Answer 21

Flush

Question 22

Maintenance:
2.____ the pump and discharge gates after flushing. STORAGE Light water may be stored in its shipping container without change in its original physical or chemical characteristics. Freezing and thawing has no effect on performance.

Answer 22

Lubricate