Class B Foam Equipment

Question 1

All Engines will be equipped with an ________ for handline class “B” foam operations.

Answer 1

inline eductor

Question 2

These will be operated utilizing existing pre-connected hose and a ______ fixed gallonage fog nozzle.

Answer 2

95gpm/100psi

Question 3

Engineer shall provide ______ at the inlet side of the educator and line may be extended out to _____ after eductor if needed without affecting foam application.

Answer 3

200 psi

300’

Question 4

The department will maintain and use the ______ foam eductor.

Answer 4

Akron 3095

Question 5

When operated at ______ and a nozzle pressure of _____, this nozzle arrangement will provide finished foam at a _____expansion ratio.

Answer 5

95 gpm
100 psi
12:1

Question 6

Verify effective blanketing with ______

Answer 6

air monitoring.

Question 7

A foam blanket may be applied by ______

Answer 7

“roll-over”, “rain drop”, or by deflection

Question 8

Standard issue foam shall be _______

Answer 8

1% x 3% AR AFFF (alcohol resistant aqueous film forming foam)

Question 9

Our Class “B” foam can be used on

Answer 9

hydrocarbon fires at a 1% eduction rate or on water soluble liquid fires at 3% (i.e., Ethanol or other polar solvents) foam).

Question 10

Foam concentrate shall be deployed based upon the following schedule:

Answer 10

All engine companies: 10 gallons
Squad 8 & 9: 30 gallons
Station 8 : 200 gallons
(Foam Trailer)

Question 11

Hydrocarbon fire application rate is _____

Answer 11

0.10gpm/sq.ft.

Question 12

Polar solvent fires application rate is _____

Answer 12

0.15gpm/sq.ft.

Question 13

APPLICATION RATE RULES OF THUMB:
95 gpm Foam Line
You can effectively fight

Answer 13

Ten gallons of concentrate will last:

950 sq.ft. Hydrocarbon fire at 1% for 10 minutes

600 to 650 sq.ft. Water soluble fires at 3% for 3 to 3½ minutes

Question 14

Troubleshooting: Eductor will not pick up concentrate

Answer 14

Check that gpm (White Bumper=95gpm)
Check and adjust pump pressure 200PSI
Check the ball valve at the pick-up tube connection point to insure it is not stuck.
Check for the possibility of air leaks at the pick-up tube connection.

Question 15

Most common cause of Eductor will not picking up concentrate is

Answer 15

the gpm rate of the nozzle and eductor are not matched.

Question 16

Troubleshooting: Not achieving fire control

Answer 16

• If fire splatters and spreads, consider the product water soluble and increase eduction rate to 3%
• Fire may exceed capacity of exist hose lines. Increase number of lines deployed.

Question 17

Troubleshooting: Fire goes out but reignites

Answer 17

Foam blanket and vapor suppression is being disrupted
Water soluble materials may be breaking down foam blanket, re-apply foam at 3% concentration
Look for third dimension of fire. Foam will not extinguish a “falling” stream of fuel. Consider dual attack with dry chemical agents

Question 18

Always flush eductor for a minimum of _____ after use with clean water.

Answer 18

3 minutes

Question 19

Foam Concentrate Shelf Life – The manufacturer’s stated shelf life for the foam is _____ PROVIDED it is maintained in the sealed original container.

Answer 19

20 years

Question 20

NFPA_____ does not require annual testing of concentrate provided it is maintained in its original, sealed container

Answer 20

NFPA 11