Chapter 10: Types of Fire Streams

Question 1

What 4 basic elements does it take to produce an appropriate and effective fire stream?

Answer 1

1. Water source
2. A means to impart sufficient pressure on the water
3. A delivery system
4. Trained personnel

Question 2

The most commonly used exterior water supply source is a:

Answer 2

Municipal water supply distribution system

Question 3

The variety of fire equipment that is required to deliver the water from the supply source to the pump and then from the pump to the point of application. This equipment falls into these 4 basic categories:

Answer 3

1. Fire hose
2. Nozzles
3. Fire hose appliances
4. Related hardware

Question 4

What are the 4 principle types of fire hose appliances?

Answer 4

1. Wyes
2. Siameses
3. Water thiefs
4. Manifolds

Question 5

What hose appliance divides one hose line into 2 separate hose lines of equal size? The new hose lines can be equal to or smaller than the original line.

Answer 5

A wye

Question 6

What hose appliance is used to combine 2 or more hose lines into a single line? Usually they are used to combine 2 or more smaller lines into one larger one.

Answer 6

A siamese

Question 7

What 2 uses do siameses have?

Answer 7

1. Used to connect several supply hoses to one medium diameter supply hose than will be run up an aerial ladder to a detachable ladder pipe
2. Used to connect several medium-diameter supply hoses in order to supply one large-diameter hose

Question 8

This hose appliance is similar to a wye and enables firefighters to take 3 attack lines off the original attack or supply line. One discharge is the same size as the intake, and the other 2 are smaller:

Answer 8

A water thief

Question 9

The most common water thief has one _____ inch intake with one ____ inch and 2 _____inch discharges:

Answer 9

2 1/2 inch
2 1/2 inch
1 1/2 inch

Question 10

Hose appliances will all create:

Answer 10

Friction loss

Question 11

What are the 3 different hose streams?

Answer 11

1. Solid stream
2. Fog stream
3. Broken stream

Question 12

What is the oldest type of fire stream?

Answer 12

Solid stream

Question 13

Which fire stream is easiest to produce?

Answer 13

Solid stream

Question 14

When considering a solid stream a good stream, at the point of break over, the stream should appear to shoot _______ of the whole volume of water inside a circle ____ inches in diameter and ____ of the whole volume inside a ____ inch circle, as nearly as can be judged by the eye:

Answer 14

Nine-tenths
15 inch
3/4
10 inch

Question 15

The flow rate from a nozzle depends on the:

Answer 15

Velocity of the stream and the area of the discharge opening

Question 16

Given equal discharge pressures, the flow capacity of a smoothbore, solid stream nozzle _______ when the diameter of the discharge opening is doubled:

Answer 16

Quadruples

Question 17

The nozzle pressure of a hand line solid-stream nozzle should not exceed ___ psi:

Answer 17

50 psi

Question 18

The recommended nozzle pressure for a master-stream solid-stream nozzle is ___ psi:

Answer 18

80 psi

Question 19

Solid streams tend to have the longest:

Answer 19

Reach

Question 20

A fire stream can be controlled mechanically only until:

Answer 20

It leaves the nozzle

Question 21

After a solid stream leaves the nozzle, it becomes influenced by these factors:

Answer 21

1. Gravity
2. Friction of air
3. Wind

Question 22

The solid stream’s maximum horizontal reach is at an angle of ____ degrees to the earth’s surface:

Answer 22

32 degrees