Chapter 14

Question 1

Foam produced by a physical agitation of a mixture of foam, concentrate, water, and Air is called?

Answer 1

Mechanical Foam

Question 2

The process used to mix foam concentrate with water in a nozzle or proportioner concentrate is drawn into the water stream by the venturi method?

Answer 2

Eduction

Question 3

Class b fuels are divided into two categories what are they?

Answer 3

Hydrocarbons and polar solvents

Question 4

Crude oil fuel oil gasoline benzene and kerosene are petroleum based and have a specific gravity less than one what are these called?

Answer 4

Hydrocarbon fuels

Question 5

Alcohol acetone ketones esters are known as miscible liquids because they mix with water what are these called?

Answer 5

Polar solvent fuels

Question 6

A petroleum-based organic compound that contains only hydrogen and carbon?

Answer 6

Hydrocarbon fuel

Question 7

Liquid having a molecule where the positive and negative charges are permanently separated, resulting in their ability to ionize and solution and create electrical conductivity. Water, alcohol, and sulfuric acid are examples of?

Answer 7

Polar solvents

Question 8

Foam is proportioned using one of the four basic methods?

Answer 8

Induction
Injection
Batch mixing
Premixing

Question 9

Chemical that lowers the surface tension of a liquid allows water to spread more rapidly over the surface of class A fuels and penetrate organic fuels?

Answer 9

Surfactant

Question 10

Minimum amount of foam solution that must be applied to an unignited fire,spill, or spill fire to either control vapor emission or extinguish the fire, measured per minute per square foot or square meter of area to be covered?

Answer 10

Application Rate

Question 11

Any application with compressed air foam systems?

Answer 11

0.2 to 0.5 percent concentrate

Question 12

Any application with air aspirating foam nozzles?

Answer 12

0.3 to 0.7 percent

Question 13

Exposure protection with standard fog nozzles?

Answer 13

0.5 to 1.0 percent concentrate

Question 14

Fire attack and overhaul with standard fog nozzles?

Answer 14

0.2 to 0.5 percent concentrate

Question 15

A medium expansion foam is commonly used at a rate of 20:1 up to?

Answer 15

200:1

Question 16

High Foam expansion is used the expansion rate from 200:1 to?

Answer 16

1000:1

Question 17

A low foam expansion contains an air/solution ratio of up to 20 parts finished foam for every part of foam solution?

Answer 17

20:1

Question 18

In order to calculate the application rate available for a from a specific nozzle?

Answer 18

Divide the flow rate by the area of fire

Question 19

To calls or undergo a chemical process of decomposition involving the splitting of a bond and the addition of the element of water?

Answer 19

Hydrolyze

Question 20

What type of foam is good for a hydrocarbon fuel product?

Answer 20

AFFF or FFFP

Question 21

What are three common types of portable foam proportioners?

Answer 21

In line foam eductors
Foam nozzle eductors self-educting master stream nozzles

Question 22

The pressure at the discharge side of the eductor must not exceed ________ percent of the eductor inlet pressure?

Answer 22

70 percent

Question 23

The foam concentrate inlet to the eductor should be no more than _______ feet above the liquid surface of the foam concentrate?

Answer 23

6 feet

Question 24

What are the techniques for applying foam to a fire or spill?

Answer 24

Direct- application method
Roll on method
Bank down method
Rain down method