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Engineer Test 2016 > Driver Operator > Flashcards

Driver Operator Flashcards

0
Q

What is the Collapse Zone Distance?

A

Equal to at least 1 and 1/2 times the height of the building.
-Position the apparatus at the corners of the building.
p103

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1
Q

Where should the apparatus be positioned if Hazardous material are involved in a fire?

A

Upwind in the Cold zone.

p102

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2
Q

Concerning the inside/outside method, if the building is less then _______ stories tall, engines companies are positioned on the side of the street _________ to the building and aerials are positioned _________of the engine.

A

5 , Closest , Outboard

p105

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3
Q

Concerning the inside/outside method, if the building is higher then _______ stories, The engine takes the _______ position and the aerials are positioned ______ to the building.

A

5, Outside , Next

p105

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4
Q

True or False
When placing the intake hose for direct water supply from static source, First, connect the hard intake hose and strainer to the pumper, then drive the pumper into the final draft position?

A

True

p109

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5
Q

What is Dual Pumping?

A

Pumper 1 and Pumper 2 are connected Intake to intake.

p113

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6
Q

Define Tandem Pumping Operations

A

A form or relay pumping with the pumpers positioned close together rather then evenly spaced in the supply hose layout.
- Used when pressures higher then a single engine is capable of supplying are required.
-Two engines may be positioned as much as 300 feet apart.
- From discharge to intake of second pumper.
p115

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7
Q

Define Wildland/Urban interface

A

The boundary between the Wildland and structural development.
p116

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8
Q

Define Anchor Point in relation to Wildland fire attack.

A

A natural man-made barrier that will prevent the fire from spreading around and encircling the engine and crew.
- Paved roads, lakes, previously burned areas
p116

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9
Q

According to Driver Operator Book, The command vehicle should be positioned ____________ of a building so that the IC is afforded a view of ________ sides of the building.

A

Near a corner, 2

p121

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10
Q

Two types of equipment are used to refill SCBA cylinders on the scene

A
  1. Cascade systems - Air cylinders that are connected together in banks
  2. Breathing air compressors - Engine-driven appliances that take in atmospheric air, purifying it, and compressing it.
    p121
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11
Q

NFPA 1962

A

Standard for the inspection, care, and use of fire hose, couplings, and nozzles and the service testing of fire hose
p115

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12
Q

When is level I staging used?

A

Any emergency response where 2 or more companies are dispatched.
- Stage atleast 1 block away from the scene in their direction of travel
p124

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13
Q

When is level II staging used?

A

When numerous emergency vehicle will be responding to the same incident; multiple alarms need level II staging.
-The first arriving company officer becomes the STAGING AREA MANAGER.
p125

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14
Q

According to Pump ops book, Companies in staging must be ready to respond within _______ minutes of being called.

A

3 minutes

p125

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15
Q

When serving as an additional apparatus for highway blocking, position apparatus ______ to ______ feet behind the shielded apparatus to asct as an additional barrier between firefighters and the flow of traffic.

A

150 to 200 feet.

p126

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16
Q

True or False
When having responded to an EMS call, EMS vehicles are to park of the street or highway and shut off all emergency lights.

A

True

p130

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17
Q

Between _______ degrees F and _______degrees F water exist in a liquid state.

A

32 and 212

p135

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18
Q

Ordinary fresh water is generally considered to weigh ______ lb/ft3 or ________lb/gal

A

62.5 or 8.33

p136

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19
Q

What is Specific Heat?

A

A measure of the heat-absorbing capacity of a substance

p136

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20
Q

What is a BTU?

A

The amount of heat required to raise the temperature of 1 pound of water 1degree F.

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21
Q

Define Latent Heat of Vaporization

A

The quantity of heat absorbed by a substance when it changes from a liquid to a vapor.
- Each pound of water requires approx. 970 btu of additional heat to completely convert to steam.
p137

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22
Q

At _____ degrees F, water expands approx ________ times its original volume.

A

212 , 1,700

p138

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23
Q

Define Viscosity

A

The tendency of a liquid to posses internal resistance to flow
p139

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24
Q

Define Specific Gravity

A

The density of liquids in relation to water.
- Water is given a value of 1
- Liquids with a specific gravity less then 1 are lighter then water and therefore float on water.
- Those with greater then 1 are heavier then water and sink to the bottom.
p139

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25
Q

First Principle (The action of pressure upon fluids)

A

Fluid pressure is perpendicular to any surface on which it acts.
p142

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26
Q

Second Principle (The action of pressure upon fluids)

A

Fluid pressure at a point in a fluid at rest is the same intensity in all directions.
p142

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27
Q

Third Principle (The action of pressure upon fluids)

A

Pressure applied to a confined fluid from without is transmitted equally in all directions.
p142

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28
Q

Fourth Principle (The action of pressure upon fluids)

A

The pressure of a liquid in an open vessel is proportional to its depth.
p142

29
Q

Fifth Principle (The action of pressure upon fluids)

A

The pressure of a liquid in an open vessel is proportional to the density of the liquid.
p143

30
Q

Sixth Principle (The action of pressure upon fluids)

A

The pressure of liquid on the bottom of a vessel is independent of the shape of the vessel.
p143

31
Q

At sea level, the atmosphere exerts a pressure of _______

A

14.7 psi

p143

32
Q

Define Head Pressure

A

Head in the fire service refers to the height of a water supply above the discharge orifice.
p144

33
Q

Elevation

A

Refers to the center line of the pump or the bottom of a static water supply source above or below ground level.
p146

34
Q

True or False

The friction loss in old hose may be as much as 50 percent greater than that in a new hose.

A

True

p147

35
Q

Define Coefficient of Friction

A

The rougher the inner surface of the pipe

p147

36
Q

First Principle of Friction Loss

A

If all other conditions are the same, friction loss varies directly with the length of hose or pipe.
p147

37
Q

What is the Second Principle of Friction Loss

A

When hoses are the same size, friction loss varies approx. with the square of the increase in the velocity of the flow.
p147

38
Q

What is the Third Principle of Friction loss

A

For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose
-Proves the advantage that larger hose has less friction loss.
p148

39
Q

What is the Fourth principle of Friction loss

A

For a given flow velocity, friction loss is approx. the same, regardless of the pressure on the water.
- Pressure loss is the same when hose at different pressures flow the same amount of water.
p148

40
Q

Define Critical Velocity

A

If the velocity is increased beyond these limits, the friction becomes so great that the entire stream is agitated by resistance.
p150

41
Q

Direct Pumping Systems

A

Use one or more pumps that take water from the primary source and discharge it through the filtration and treatment process.
p152

42
Q

What are the 3 methods for moving water in a system?

A
  1. Direct pumping
  2. Gravity
  3. Combination
    p152
43
Q

In residential areas, what is the recommended size for fire hydrant supply mains?

A

6 iches with 8 inch cross-connecting mains at intervals not more then 600 feet.

44
Q

In business and industrial districts, what is the reccommended size fir fire hydrant mains?

A

8 inch with cross-connecting mains every 600 ft.

p157

45
Q

Define Average daily consumption

A

The average of the total amount of water used in a water distribution system over the period of 1 year.
p159

46
Q

Maximum daily consumption

A

Maximum total amount of water that was used during any 24 hour interval within a 3 year period.

-The maximum daily consumption is normally about 1 and 1/2 times the average daily consumption.
p160

47
Q

Peak hourly consumption

A

Maximum amount of water used in any 1 hour interval over the course of a day
p160

48
Q

Solid stream nozzles used on handlines should be operated at? Master stream?

A

50 psi , 80 psi

p166

49
Q

Formula for Determining the flow from a solid stream

A

GPM=29.7 x d(squared) x (Square root) NP

p166

50
Q

Generally, _____gpm is the maximum amount of water that can safely flow through a handline nozzle.

A

350 gpm.

p171

51
Q

Master streams should be operated at?
Smoothbore
Fog
….And flow usually ______gpm or greater.

A

80psi
100psi
350 gpm
p171

52
Q

NFPA 1901

A

Standard for automotive Fire apparatus

p175

53
Q

What is the average length of piercing nozzle?

A

Commonly used in aircraft firefighting, they can be 3-6 foot long and are made of hollow steel rod 1 1/ 2 inches in diameter. Capable of delivering 100gpm
p176

54
Q

Nozzle reaction is illustrated by Newtons _____ law of Motion.

A

3rd
“For every action there is an equal and opposite reaction”
p178

55
Q

Practical working limits for velocity of fire streams are within ____ to ____ feet per second.

A

60 to 120

p178

56
Q

Formula for calculating Nozzle reaction Solid stream

A

NR=1.57 x d (squared) x NP

p178

57
Q

Formula for calculating Nozzle reaction for Fog stream

A

NR = 0.0505 X Q X (Square root) NP

p179

58
Q

Elevation Pressure

A

Elevation differences create pressure loss or gain.

p184

59
Q

Water exerts a pressure of _______psi per foot foot of elevation.

A

0.434 psi

p191

60
Q

Friction loss formula

A

FL=CQ(squared)L

61
Q

Determine Solid Stream Flow

A

29.7 x d (Squared) x (square root) NP

62
Q

Pump discharge pressure formula

A

PDP = NP + TPL

63
Q

Net pump discharge pressure

A

NPDP = PDP - Intake reading

64
Q

Elevation pressure formulas

A

EP=5psi x (# of stories -1)
or
EP=0.5H

65
Q

What percentages of the calls made by FD are EMS calls?

A

60 %

p130

66
Q

Coefficient for 1 1/2 inch

A

24

67
Q

Coefficient for 1 3/4 with 1 1/2 coupling?

A

15.5

68
Q

Coefficient for 2 1/2 inch

A

2

69
Q

Coefficient for 3 with 2 1/2 inch coupling?

A

0.8

70
Q

Coefficient for 3 with 3 inch coupling?

A

0.6777

71
Q

Coefficient for 5 inch

A

0.08

Engineer Test 2016 (12 decks)

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