Driver Operator Chapter 6 Flashcards
1
Q
Gauge reading
A
Psig
2
Q
Pressure exerted by the atmosphere at sea level
A
Atmospheric Pressure (14.7 psi)
3
Q
Gauge reading
A
psig
4
Q
The psi above perfect vacuum, absolute zero
A
psia
5
Q
Any pressure less than atmospheric pressure
A
Vacuum
6
Q
Absolute zero pressure
A
Perfect vacuum
7
Q
Gauge readings of less than 0 psi
A
Negative Pressure
8
Q
The height of a water supply above the discharge orifice
A
Head
9
Q
The result of dividing the number of feet that the water supply is above the discharge orifice
A
Head Pressure
10
Q
Stored potential energy available to force water through pipe, fittings, fire hose, and adapters
A
Static Pressure
11
Q
At rest or without motion
A
Static
12
Q
That pressure found in a water distribution system during normal consumption demands
A
Normal Operating Pressure
13
Q
That part of the total available pressure not used to overcome friction loss or gravity while forcing water through pipe, fittings, fire hose, and adapters
A
Residual Pressure
14
Q
A remainder or that which is left
A
Residual
15
Q
That forward velocity pressure at the discharge opening while water is flowing
A
Flow Pressure
16
Q
The center line of the pump or the bottom of the static water supply above or below ground level
A
Elevation
17
Q
The position of an object above or below sea level
A
Altitiude
18
Q
What happens when a nozzle is above the pump
A
Pressure loss
19
Q
What happens when the nozzle is below the pump
A
Pressure gain
20
Q
Another term for both pressure loss and pressure gain
A
Elevation pressure
21
Q
That part of the total pressure lost while forcing water through pipe, fittings, fire hose, and adapter
A
Friction Loss
22
Q
Water is a compound of hydrogen and oxygen formed when:
A: One hydrogen atom combines with one oxygen atom.
B: Two hydrogen atoms combine with one oxygen atom.
C: Two oxygen atoms combine with one hydrogen atom.
D:Two hydrogen atoms combine with two oxygen atoms.
A
B: Two hydrogen atoms combine with one oxygen atom.
23
Q
Water exists in a liquid state between: A: 0°F and 100°F B: 16°F and 110°F C: 20°F and 200°F D: 32°F and 212°F
A
D: 32°F and 212°F
24
Q
For fire protection purposes, ordinary fresh water is generally considered to weigh: A: 5.25 lb/gal B: 7.26 lb/gal C: 8.33 lb/gal D: 12.8 lb/gal
A
C: 8.33 lb/gal
25
```
Water has the ability to extinguish fire in all the following EXCEPT:
A: Cooling
B: Smothering
C: Absorbing heat from the fire
D: Excluding carbon dioxide
```
D: Excluding carbon dioxide
26
What is specific heat?
A: The measure of the heat absorbing capacity of a substance
B: The heat required to raise the temperature of 1 pound of water 1°F
C: The specific point at which a substance absorbs enough heat to combust
D: The quantity of heat absorbed by the substance when it changes from a liquid to a vapor
A: The measure of the heat absorbing capacity of a substance
27
What unit is used to measure amounts of heat transfer?
A: Calorie
B: Kilopascal
C: British thermal unit (Btu) or joule (J)
D: Degrees Fahrenheit (°F)
C: British thermal unit (Btu) or joule (J)
28
What is a Btu?
A: A measure of the heat absorbing capacity of a substance
B: The heat required to raise the temperature of 1 pound of water 1°F
C: The specific point at which the substance absorbs enough heat to combust
D: The quantity of heat absorbed by a substance when it changes from a liquid to a vapor
B: The heat required to raise the temperature of 1 pound of water 1°F
29
The latent heat of vaporization is:
A: A measure of the heat absorbing capacity of a substance
B: The heat required to raise the temperature of 1 pound of water 1°F
C: The specific point at which the substance absorbs enough heat to combust
D: The quantity of heat absorbed by a substance when it changes from a liquid to a vapor
D: The quantity of heat absorbed by a substance when it changes from a liquid to a vapor
30
```
Vaporization does not completely occur at boiling point. Each pound of water requires approximately ___ Btu of additional heat to completely convert to steam.
A: 790 Btu
B: 934 Btu
C: 970 Btu
D: 1,023 Btu
```
C: 970 Btu
31
```
The speed with which water absorbs heat increases in proportion to:
A: The temperature of the water
B: The amount of steam expansion
C: The temperature of the fire area
D: The water surface exposed to the heat
```
D: The water surface exposed to the heat
32
```
At 212°F, water expends approximately ___ times it’s original volume.
A: 1,070
B: 1,500
C: 1,700
D: 2,500
```
C: 1,700
33
```
Steam expansion is ____ inside a burning building.
A: Rapid
B: Gradual
C: Nonexistent
D: Unnecessary
```
A: Rapid
34
What is viscosity?
A: A measure of the heat absorbing capacity of a substance.
B: The heat required to raise the temperature of 1 pound of water 1 degree F
C: The specific point at which a substance absorbs enough heat to combust.
D: The tendency of a liquid to possess internal resistance to flow.
D: The tendency of a liquid to possess internal resistance to flow.
35
What is specific gravity?
A: Static pressure
B: Atmospheric pressure
C: The density of liquids in relation to water
D: The viscosity of water in relation to solids
C: The density of liquids in relation to water
36
What kinds of liquids are lighter than water and therefore float on water?
A: Those with a specific gravity less than 1
B: Those with a specific gravity greater than 1
C: Those with a specific gravity less than 10
D: Those with a specific gravity greater than 10
A: Those with a specific gravity less than 1
37
Force is defined as:
A: Force per unit area
B: A simple measurement of space
C: Force exerted on one substance by another
D: A measurement directly related to the force of gravity
D: A measurement directly related to the force of gravity
38
```
Customary-In order to understand how to determine force, it is necessary to know that the weight of 1 cubic foot of water is approximately:
A: 0.434 lbs
B: 8.33 lbs
C: 62.5 lbs
D: 102.8 lbs
```
C: 62.5 lbs
39
Elevation is:
A: The term used to describe both pressure loss and pressure gain.
B: The position of an object above or below sea level.
C: The center line of the pump or the bottom of a static water supply source above or below ground level
D: The part of the total pressure lost while forcing water through a pipe, fittings, fire hose, and adapters
C: The center line of the pump or the bottom of a static water supply source above or below ground level.
40
Altitude is:
A: The term used to describe both pressure loss and pressure gain.
B: The position of an object above or below sea level.
C: The center line of the pump or the bottom of a static water supply source above or below ground level.
D: The part of the total pressure lost while forcing water through a pipe, fittings, fire hose, and adapters.
B: The position of an object above or below sea level.
41
```
When a nozzle is above the pump, there is a:
A: Gravity loss
B: Pressure loss
C: Pressure gain
D: Elevation pressure
```
B: Pressure loss
42
Friction loss is:
A: Pressure loss due to friction
B: The term used to describe both pressure loss and pressure gain
C: The position of an object above or below sea level
D: The center line of the pump or the bottom of a static water supply source above or below ground level.
A: Pressure loss due to friction
43
Which of the following is NOT a cause of friction loss?
A: Couplings
B: Sharp bends
C: Improper valve size
D: Change in hose size or orifice by adapters
C: Improper valve size
44
```
Flow in pressure will always be ____ near the supply source and ____ at the farthest point in the system.
A: Greatest/lowest
B: Lowest/ greatest
C: Hardest/softest
D: Softest/hardest
```
A: Greatest/lowest
45
```
If the velocity is increased beyond practical limits, the friction becomes so great that resistance agitates the entire stream creating:
A: Critical velocity
B: Terminal velocity
C: Critical friction loss
D: Terminal friction loss
```
A: Critical velocity
46
```
Which of the following characteristics of hose layouts does NOT affect friction loss?
A: Hose length
B: Hose diameter
C: Kinks in the hose
D: Sexless couplings on the hose
```
D: Sexless couplings on the hose
47
What is water hammer?
A: The pressure found in a water distribution system during normal consumption demands
B: The part of the total pressure lost when water is forced through pipe, fittings, fire hose and adapters
C: The decrease in the amount of water flowing through a hose, reducing the speed of the water and therefore causing less friction loss
D: The sudden stopping of water moving through a hose or pipe resulting in an energy surge being transmitted in the opposite direction, often at times the original pressure.
D: The sudden stopping of water moving through a hose or pipe resulting in an energy surge being transmitted in the opposite direction, often at times the original pressure.
48
```
Which of the following is NOT one of the four components of a municipal water supply system?
A: Source water supply
B: Means of moving water
C: Wastewater treatment plant
D: Water distribution system
```
All four are components pg. 152
49
```
Where can the primary water supply be obtained?
A: Water processing facility
B: Water treatment facility
C: Water distribution system
D: Surface water or ground water
```
D: Surface water or ground water
50
```
Which means of moving water uses one or more pumps that take water from the primary source and discharge it through the filtration and treatment processes?
A: Gravity system
B: Distribution system
C: Combination system
D: Direct pumping system
```
D: Direct pumping system
51
```
Which means of moving water uses a primary water source located at a higher elevation than the distribution system?
A: Gravity system
B: Distribution system
C: Combination system
D: Direct pumping system
```
A: Gravity system
52
What is the fire department's main concern regarding treatment facilities?
A: That the process of treating water may lead to less available water volume and pressure
B: That treatment facilities may not supply enough water to adequately fight large scale fires
C: That a maintenance error, natural disaster, loss of power supply, or fire could disable the pumping stations
D: That contaminants may not be completely removed, causing undue corrosion of hose and couplings
C: That a maintenance error, natural disaster, loss of power supply, or fire could disable the pumping stations
53
```
From where does the supply distribution system receive water?
A: From the pumping station
B: From the water treatment facility
C: From a network of distribution pipes
D: From a ground or surface water source
```
A: From the pumping station
54
```
A fire hydrant that receives water from only one direction is known as a :
A: One-way heading
B: One-way hydrant
C: Dead-head hydrant
D: Dead-end hydrant
```
D: Dead-end hydrant
55
```
A distribution system that provides circulating feed from several mains constitutes a:
A: Grid system
B: Waffle pattern
C: Gridiron system
D: Crosshatch system
```
A: Grid system
56
```
____ are large pipes (mains) with relatively widespread spacing, that convey large quantities of water to various points of the system for local distribution to the smaller mains.
A: Distributors
B: Contributors
C: Primary feeders
D: Secondary feeders
```
C: Primary feeders
57
```
____ make up a network of intermediate-sized pipes that reinforce the grid within various loops of the primary feeder system and aid the concentration of the required fire flow at any point.
A: Distributers
B: Contributors
C: Primary feeders
D: Secondary feeders
```
D: Secondary feeders
58
```
____ make up a grid arrangement of smaller mains serving individual fire hydrants and blocks of consumers.
A: Distributors
B: Contributors
C: Primary feeders
D: Secondary feeders
```
A: Distributors
59
What is the function of a valve in a water distribution system?
A: To provide a mans for controlling the flow of water through the distribution piping
B: To receive water from the pumping station and deliver it tot the area served
C: TO take water from the primary source and discharge it through the filtration and treatment processes
D: TO convey large quantities of water to various points of the system for local distribution to the smaller areas
A: To provide a mans for controlling the flow of water through the distribution piping
60
Valve spacing should be such that:
A: There is at least 12 feet between valves
B: Valves are located at infrequent intervals
C: Large amounts of pipe are connected by one valve
D: Only a minimum length of pipe is out of service at one time
D: Only a minimum length of pipe is out of service at one time
61
```
Which type of valve shows whether the gate or have seat is open, closed, or partially closed?
A: Control valve
B: Indicating valve
C: Check valve
D: Non-indicating valve
```
B: Indicating valve
62
```
Which type of valve is a hollow metal post that is attached to the valve housing?
A: Control valve
B: Butterfly valve
C: Post indicator valve
D: Non-indicating valve
```
C: Post indicator valve
63
```
Which types of valves are the most common types of valves used on most public water distribution systems?
A: Control valve
B: Butterfly valve
C: Post indicator valve
D: Non-indicating valve
```
D: Non-indicating valves
64
Friction loss in water pipes can be reduced by:
A: Using only steel pipes
B: Operating valves periodically
C: Flushing hydrants periodically
D: Keeping valves partially open during use
C: Flushing hydrants periodically
65
Which of the following statements about private water supply systems is FALSE?
A: Private water supply systems are most often found in residential developments
B: The design of the private water supply systems is typically similar to that of municipal systems
C: Private water supply systems may service one large building or a series of buildings on the complex
D: Most private water supply systems maintain separate piping for fire protection and domestic/industrial services
A: Private water supply systems are most often found in residential developments
