Driver/ops Ch 7-11, 15

Question 0

Minimum flow setting for interior structure firefighting?

Answer 0

95-100gpm

Question 1

Formula for gpm out a solid stream nozzle

Answer 1

GPM= 29.7 x d(squared) x squareroot NP

Question 2

Define master stream

Answer 2

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

Question 3

Four categories of master streams

Answer 3

Monitor, turret, deluge, elevated master stream.

Question 4

How is a monitor different than deluge?

Answer 4

Stream direction and angle can be changed while water is flowing

Question 5

What is turret pipe?

Answer 5

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

Question 6

What is deluge set?

Answer 6

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

Question 7

Elevated master stream?

Answer 7

Large capacity nozzle at the end of an aerial device.

Question 8

Nozzle reaction for solid stream nozzles formula

Answer 8

NR= 1.57 x D squared x NP

Question 9

Nozzle reaction for fog streams formula

Answer 9

NR = .0505 x Q x squareroot nozzle pressure

Q= total flow in gpm

Question 10

What causes friction loss?

Answer 10

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

Question 11

Friction loss formula

Answer 11

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

FL= CxQ2xL

Question 12

Elevation pressure formula

Answer 12

EP= .5xheight

Question 13

Two types of flow meters

Answer 13

Paddle wheel and spring probe

Question 14

Classy fuels are divided into what two categories?

Answer 14

Hydrocarbons and polar solvents

Question 15

Four methods foam may be proportioned

Answer 15

Induction, injection, batch mixing, premixing

Question 16

What is class A foam?

Answer 16

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

Question 17

Shelf life of protein based foams

Answer 17

Ten yrs

Question 18

Shelf life of synthetic based foams

Answer 18

20-25 yrs

Question 19

What is the most common type of foam used today

Answer 19

aFFF

Aqueous film forming foam

Question 20

Tactical advantages of CAFS

Answer 20

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

Still lame

Question 21

CAFS limitations

Answer 21

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

Question 22

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

Answer 22

FALSE

They should be the same. It’s safety

Question 23

IFSTA definition of handling nozzle:

Answer 23

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

Question 24

4 techniques for applying foam

Answer 24

Direct application, roll on, bank down, rain down

Question 25

What are Durable agents

Answer 25

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