Chapter 10: Types of Fire Streams Flashcards Preview

Fire Service Hydraulics and Water Supply 2nd Edition > Chapter 10: Types of Fire Streams > Flashcards

Flashcards in Chapter 10: Types of Fire Streams Deck (22)
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1
Q

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

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

The most commonly used exterior water supply source is a:

A

Municipal water supply distribution system

3
Q

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:

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

What are the 4 principle types of fire hose appliances?

A
  1. Wyes
  2. Siameses
  3. Water thiefs
  4. Manifolds
5
Q

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.

A

A wye

6
Q

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.

A

A siamese

7
Q

What 2 uses do siameses have?

A
  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
8
Q

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:

A

A water thief

9
Q

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

A

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

10
Q

Hose appliances will all create:

A

Friction loss

11
Q

What are the 3 different hose streams?

A
  1. Solid stream
  2. Fog stream
  3. Broken stream
12
Q

What is the oldest type of fire stream?

A

Solid stream

13
Q

Which fire stream is easiest to produce?

A

Solid stream

14
Q

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:

A

Nine-tenths
15 inch
3/4
10 inch

15
Q

The flow rate from a nozzle depends on the:

A

Velocity of the stream and the area of the discharge opening

16
Q

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

A

Quadruples

17
Q

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

A

50 psi

18
Q

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

A

80 psi

19
Q

Solid streams tend to have the longest:

A

Reach

20
Q

A fire stream can be controlled mechanically only until:

A

It leaves the nozzle

21
Q

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

A
  1. Gravity
  2. Friction of air
  3. Wind
22
Q

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

A

32 degrees