# Driver/ops Ch 7-11, 15 Flashcards Preview

## Pumping Operator/driver Handbook > Driver/ops Ch 7-11, 15 > Flashcards

Flashcards in Driver/ops Ch 7-11, 15 Deck (26)
0
Q

Minimum flow setting for interior structure firefighting?

A

95-100gpm

1
Q

Formula for gpm out a solid stream nozzle

A

GPM= 29.7 x d(squared) x squareroot NP

2
Q

Define master stream

A

Any fire stream that is too large to be controlled without mechanical aid

3
Q

Four categories of master streams

A

Monitor, turret, deluge, elevated master stream.

4
Q

How is a monitor different than deluge?

A

Stream direction and angle can be changed while water is flowing

5
Q

What is turret pipe?

A

Mounted on apparatus deck, connected directly to the pump by direct piping

6
Q

What is deluge set?

A

Short length of hose with s large nozzle supported by tripod.

7
Q

Elevated master stream?

A

Large capacity nozzle at the end of an aerial device.

8
Q

Nozzle reaction for solid stream nozzles formula

A

NR= 1.57 x D squared x NP

9
Q

Nozzle reaction for fog streams formula

A

NR = .0505 x Q x squareroot nozzle pressure

Q= total flow in gpm

10
Q

What causes friction loss?

A

Hose condition, couplings, kinks, volume of water flowing per minute.

11
Q

Friction loss formula

A

FL= coefficient x gpm/100 squared x length/100

FL= CxQ2xL

12
Q

Elevation pressure formula

A

EP= .5xheight

13
Q

Two types of flow meters

A

14
Q

Classy fuels are divided into what two categories?

A

Hydrocarbons and polar solvents

15
Q

Four methods foam may be proportioned

A

Induction, injection, batch mixing, premixing

16
Q

What is class A foam?

A

Formulation of hydrocarbon surfactants that reduce the surface tension of the water in the foam solution.

17
Q

Shelf life of protein based foams

A

Ten yrs

18
Q

Shelf life of synthetic based foams

A

20-25 yrs

19
Q

What is the most common type of foam used today

A

aFFF

Aqueous film forming foam

20
Q

A

Longer fire stream reach, durable uniform air bubbles, resists heat longer, hose lines weigh less, safer attack from greater distance.

Still lame

21
Q

CAFS limitations

A

Expensive, erratic hose reaction, hose ruptures, additional training.

22
Q

True false: nozzle flow rates should be different for class A foam application as for water.

A

FALSE

They should be the same. It’s safety

23
Q

IFSTA definition of handling nozzle:

A

Any nozzle that one to three firefighters can safely handle and flows less than 350 gpm

24
Q

4 techniques for applying foam

A

Direct application, roll on, bank down, rain down

25
Q

What are Durable agents

A

Water absorbent polymers rather than hydrocarbon based surfactants.
When mixed with water they form minute polymer bubbles filled with water.