Ch 3 Flashcards
95 gpm eductor need how much psi?
200 psi
82 gpm eductor need how much psi?
150 psi
106 gpm eductor needs how much psi?
250 psi
Venturi process works with high speed water how fast:
120 mph
When using synthetic foam concentrates, it is advisable to remove the ______ because ______gpm flow may be too much for the filter to handle.
- Filter screen
- 6 gpm
Most U.S.-made fire department type in-line foam eductors can tolerate approximately ______ psi of back pressure, about 65% of its ______ psi.
- 130 psi
- 200 psi
With 200 feet of 1 3/4 inch hose, it take about ______ (time) for nozzle operator to see foam solution.
20 sec
Pickup tube ends should be cut at about a ______ angle when the filter basket is removed.
30 degree
Master stream foam nozzles can flow up to ______ gpm and allow foam concentrate supply to be as far as ______ away and be elevated up to ______.
- 12,00 gpm flow
- 3,000 feet away
- 50 feet elevation
Around-the-pump proportioners are foam educators that operate on suction or supply side of the pump. The pump maintains incoming supply pressure of ______ or less from shutdown.
10 psi
Around-the-pump proportioning systems are available from ______ gpm to ______ gpm.
- 60 gpm
- 2,000 gpm
Underwriters Laboratories maximum concentrate storage temperature is:
- 120 degrees F
- 49 degrees C
In hot climates where foam systems are idle for more than ______ days, recommended the system be operated for about ______ every ______.
- 60 days
- 30 seconds
- 2 months
Class A foam concentrates may not retain their foaming properties if mixed in water for more than ______.
24 hours
On average, a foam stream from a fog nozzle in a straight-stream setting outreaches aerating nozzles by as much as ______.
20%
