Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Apperatus Tech Test > IFSTA 5 principles of water > Flashcards

IFSTA 5 principles of water Flashcards

1
Q

Water is a compound of how many hydrogen and oxygen atoms

page 167 3rd

A

Two hydrogen

one oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In what temperature range does water exist in a liquid state

Page 167 3rd

A

32-212

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

For fire protection purposes freshwater is generally considered to weigh how much
3rd page 167

A
  1. 33 lbs per gallon

62. 4 lbs per cubic foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

in what ways does Water have the ability to extinguish fire

3rd page 168

A

Cooling/absorbing heat

smother

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Water depends on what 4 factors as an extinguishing agent

Page 136 second edition

A

Specific heat
latent heat of vaporization
exposed surface area
specific gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Define specific heat

Page 136 second edition

A

A measure of heat absorbing capacity of a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What unit is used to measure amount of heat transfer

Page 136 second edition

A

British thermal unit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a btu?

Page 136 second edition

A

The heat required to raise the temperature of 1 pound of water by 1°

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define latent heat of vaporization

Page 137 second edition

A

The quantity of heat absorbed by substance when it changes from a liquid to a vapor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Each pound of water requires approximately ——- BTUs of additional heat to completely convert into steam

Page 137 second edition

A

970

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The speed with which water absorbs heat transfer is proportional to what
Page 137 second edition

A

The water surface exposed to the heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

At 212°F water expands approximately ——- its original volume

Page 138 second edition

A

1700

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Define specific gravity

Page 168 3rd

A

The density of liquids in relation to water

water = 1
less than 1 = floats
greater than 1 = sinks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Define force

3rd page 171

A

simple measure of weight, expressed in pounds/kgs

Influence causing changes in speed direction shape of a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When a nozzle is above the pump there will be

Page 146 second edition

A

Pressure loss

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Define critical velocity

Page 181 3rd

A

friction becomes so great that resistance agitates the entire system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where is the primary water supply obtained

Page 152 second edition

A

Surface water or ground water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Define primary feeders

Page 184 3rd

A

Large pipes relatively widespread providing large quantities of water to various points of the system for Local distribution to smaller mains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Define secondary feeders

Page 185 3rd

A

Network of intermediate size pipes within various loops of the primary feeder system aiding the concentration of require Fire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Define distributors

Page 185 3rd

A

Grid arrangement of smaller mains serving individual fire hydrants and blocks of consumers

21
Q

Which type of valve is most commonly used in public water distribution systems
Page 186 3rd

A

Non-indicating valves

22
Q

Define average daily consumption

Page 188 3rd

A

Total amount of water used in a water distribution system over the period of one year

23
Q

True or false private water distribution systems are most often found in residential developments
188 3rd

A

false

24
Q

define altitude

Page 176 3rd

A

Geographic position of object in relation to sea level

25
Q

define friction loss

Page 177 3rd

A

Loss of pressure created by the turbulence of water moving against the interior walls of the hose or pipe

26
Q

what is the first principle of pressure

pg 172 3rd edition

A

fluid pressure is perpendicular to any surface on which it acts

90 degrees , water pushes on ocean floor

27
Q

what is the second principle of pressure

pg172 3rd edition

A

Fluid pressure at a point in fluid at rest is the same intensity in all directions

test tube of water getting confined

28
Q

what is the third principle of pressure

pg 172 3rd edition

A

Pressure applied to a confined fluid is transmitted equal in all directions

29
Q

what is the fourth principle of pressure

pg173 3rd edition

A

Pressure of a liquid in an open vessel is proportional to its depth

30
Q

what is the fifth principle of pressure

pg173 3rd edition

A

Pressure of a liquid is proportional to the density of that liquid

31
Q

what is the sixth principle of pressure

pg174 3rd edition

A

Pressure of a liquid at the bottom of a vessel is independent of the shape of the vessel

32
Q

 what term is used to define a pressure less than atmospheric pressure
pg 175 3rd edition

A

vacuum

33
Q

what term is used to define height of a water supply above the discharge orifice
pg175 3rd edition

A

head pressure

34
Q

what term defines stored potential energy available to force water through pipes, fittings hose BEFORE it flows from a hydrant?
pg175 3rd edition

A

static pressure

35
Q

What term defines portion of the total available pressure not being used to overcome friction loss or gravity while forcing water through pipes fittings hoses
Page 176 3rdedition

A

Residual pressure

36
Q

what term defines forward velocity pressure resulting from water being discharge through an opening
page 176 3rd edition

A

flow pressure

37
Q

what is the first principle of friction loss

page 178 3rd edition

A

If all other conditions of the same friction loss varies directly with the length of the hose or pipe

38
Q

what is the second principle of friction loss

page 178 3rd ed

A

Friction loss varies approximately with the square of the increase in the velocity of the flow
————————-
200 gpm to 400 gpm, 4x the psi

39
Q

what is the third principle of friction loss

page 179 3rd ed

A

friction loss varies inversely as the fifth power of the diameter of the hose

40
Q

what is the fourth principle of friction loss

page 179 3rd ed

A

Friction loss is approximately the same regardless of the pressure on the water

41
Q

what elements do engineers use to estimate amount of water a community needs
page 183 3rd ed

A

Domestic industrial and fire fighting use

42
Q

define a distribution system

page 184 3rd ed

A

Part of an overall water supply system that receives the water from a pumping station and delivers it throughout the area

43
Q

define a grid system

page 184 3rd edition

A

Water supply system that utilizes lateral feeders for improved distribution

44
Q

how many pounds is one cubic foot of water weigh

3rd page 167

A

62.4 lbs per cubic foot

45
Q

How much psi does a column of water 2.304 feet in height exert at its base

3rd page 171

A

1psi

46
Q

A pressure of how much psi is required to reduce water volume by 1%

3rd page 179

A

30,000 psi

47
Q

how often should valves be operated in the water system

3rd page 186

A

at least once a year

48
Q

define pressure

3rd page 170

A

Force per unit area exerted by a liquid or gas measuring pounds per square inch

Apperatus Tech Test (44 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions