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2022 Apparatus Tech Test > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

One cubic foot contains __ gallons?

A

7.5 Gallons

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2
Q

One cubic foot of fresh water weighs?

A

62.5 Pounds

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3
Q

One gallon of fresh water weights?

A

8.33 Pounds

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4
Q 
How much water is contained in each section of hose?
50' of 1.88"?
50' of 2 1/2"?
50' of 3"?
100' of 4"?
A
  1. 24 Gallons
  2. 74 Gallons
  3. 35 Gallons
  4. 25 Gallons
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5
Q

What is the Nozzle Pressure (NP) for handlines with smooth bore nozzles? And what can it be increased to for more GPM’s?

A

50 psi but can be increased to 65 psi.

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6
Q

What is the Nozzle Pressure (NP) for smooth bore master stream? And what can it be increased to, to maximize flow?

A

80 psi and can be increased to 100 psi.

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7
Q

What is the Nozzle Pressure for the Akron Assault Nozzle? What is the Nozzle Pressure for all other Fog Nozzles?

A

50 psi, all other Fog Nozzles are 100 psi

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8
Q

GPM for Akron Assault with fog nozzle? With 15/16” slug?

A

175 gpm, 185 gpm

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9
Q

What is the formula to figure out gallonage in a square or rectangle container?

A

L’ x W’ x D’ x 7.5

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10
Q

What is the formula to figure out gallonage in a cylindrical container?

A

Pie x R squared x H’ (or L’) x 7.5

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11
Q

Tip Sizes and Flow for Handlines? Theoretical

A 
1/2"       53 GPM
7/8"       161 GPM
15/16"     185 GPM
1"             210 GPM
1 1/8"        266 GPM
1 1/4"        328 GPM
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12
Q

Tip Sizes and Flow for Handlines? Fire Ground

A 
1/2"        50 GPM
7/8"        150 GPM
15/16"      185 GPM
1"             200 GPM
1 1/8"        250 GPM
1 1/4"         325 GPM
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13
Q

Master Stream Tip Sizes and Flow? Theoretical

A 
1 1/4"         415 GPM
1 3/8"        502 GPM
1 1/2"          598 GPM
1 3/4"         814 GPM
2"               1062 GPM
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14
Q

Master Stream Tip Sizes and Flow? Fire Ground

A 
1 1/4"          400 GPM
1 3/8"         500 GPM
1 1/2"           600 GPM
1 3/4"          800 GPM
2"                1000 GPM
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15
Q 
Flow for Individual Devices:
Booster Reel?
Decon Shower? (Pressure and Flow)
1" Forestry Hose?
Piercing Nozzle? (Pressure and Flow)
A

100 PSI
270 GPM @ 75 psi
100 PSI
125 GPM @ 100 psi

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16
Q

Distributor Nozzle Size, Flow and Pressure required?

A

2 1/2” = 250 GPM @ 100 PSI

1 1/2” = 95 GPM @ 50 PSI

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17
Q

Cellar Nozzle Size, Flow and Pressure required?

A

2 1/2” = 350 GPM @ 100 PSI

1 1/2’ = 160 GPM @ 100 PSI

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18
Q

Discharge Pressure Required for Fixed Monitor (Deck Gun) at specific sizes for max flow?

1 3/8” @ 500 GPM = (What Pressure)
1 1/2” @ 600 GPM= ( What Pressure)
1 3/4” @ 800 GPM= (What Pressure)
2” @ 1,000 GPM= (What Pressure)?

A

110 PSI
110 PSI
110 PSI
120 PSI

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19
Q

Discharge Pressure for Task Force Tip Automatic (Fog Nozzle) to achieve specific pressures?

500 GPM = (What Pressure)
750 GPM = (What Pressure)
1000 GPM= (What Pressure)
1250 GPM= (What Pressure)

A

90 PSI
110 PSI
120 PSI
140 PSI

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20
Q 
Akron Adjustable Flow discharge pressure required for specific flows?
500 GPM = (What Pressure)
750 GPM =  (What Pressure)
1000 GPM = (What Pressure)
1250 GPM = (What Pressure)
A

100 PSI
110 PSI
130 PSI
140 PSI

21
Q 
MERCURY MONITOR:
Nozzle Pressure for Both Nozzle Types?
Max intake Pressure?
Appliance Loss?
How it's supplied?
A 
80 PSI NP Smooth Bore 1 3/8" Tip
100 PSI NP Fog Nozzle
150 PSI max intake pressure
10 PSI Appliance Loss
Single 3" supply line OR 2 1/2" (Friction Loss will be a little higher)
22
Q

What is the Friction Loss Formula?

What are the Coefficents used in the Formula?

A

FL= Coefficent x Quantity(Or GPM) squared x Length (amount of hose/100)

1.88=10
2 1/2= 2
3”= 0.8
4”= 0.2

23
Q

What is the Appliance loss in the following scenarios?

Less than 350 GPM?
Over 350 GPM?
Ladder Pipe?
Master Streams (Except Mercury MOnitor)?
Standpipes?
A 
0
10
25
25
25
24
Q

How much is Elevation Pressure (EP)? Theoretical and Fireground?

A

.434 psi for every foot. (Theoretical)
5 psi per 10 ft (Fireground)

Can be added or subtracted to the formula

25
Q

What is used to get you PDP (Pump Discharge Pressure)?

A

PDP= NP+TPL
NP= Nozzle Pressure
TPL= FL+AL+EP
Friction Loss+Appliance Loss+Elevation Pressure

26
Q

What is max safe PDP?

A

250 PSI

27
Q

JS10 nozzle when using the in line eductor, the nozzle should be no higher than ___ above the eductor?

A

5 ft.

28
Q

For CAFS Engines: IF being supplied from another source, tank fill valve must be kept in _____ position during operation to prevent water tank from being contaminated. INtake pressure should not exceed __ psi.

A

CLOSED Position

10 Psi

29
Q

CAFS Engines carry how much Water Class A and Class B Foam?

A

750 Gallons of Water
40 Gallons of Class A
40 Gallons of Class B

30
Q

Pierce recommends only use line up to ____ for CAFS?

A

250’

31
Q

4” Supply lines are charged to what initially?
3” Supply Lines?
4” and 3” together?

A

50 psi Initially
100 psi Initially
100 psi Initially.

32
Q

PDP Formula for supply?

A

RP + TPL
RP= Residual Pressure
TPL= FL+EL+AL

33
Q

Formula to figure max discharge pressure for max flow from a pressurized sourc?

A

Static Hydrant Pressure + 150psi

As long as pumper discharge doesn’t exceed this #, your getting max flow.

34
Q

FL in multiple lines (Coefficients):

Two 3” lines?
One 4” and One 3”?
Two 4” Lines?

A
  1. 2
  2. 09
  3. 05
35
Q

Formula to calculate available water: AND what are the percentage drops?

A

(SP-RP) x 100/ SP (Static-Residual) x 100/Static

Percentage Drop
0-10% 3 times
11-15% 2 times
16-25% 1 times
More than 25% less than 1.
36
Q

When do you secure a water supply for standpipe operations?

Starting Pressure

A

FIRST THING BEFORE HOOKING TO SYSTEM.

150 PSI

37
Q

Starting Pressure for Sprinkler System?

When is it charged?

A

150 PSI

Charged when smoke OR fire is showing or upon confirmation of a working fire

38
Q

When should a combination system (Standpipe & Sprinkler) be charged?

Starting pressure?

A

Considered a standpipe, so supplied and charged immediately upon arrival.

150 PSI

39
Q

Formula to supply a master stream?

Starting Pressure?

Who can give order to charge the Master Stream?

A

NP+AL+EP+FL= PDP
Nozzle Pressure+Appliance Loss(25)+Nozzle Height+FL (Supply Line between Aerial and Pumper)

150 PSI

Truck OIC OR Truck Driver

40
Q

Procedure to Draft?

A

Use Side Intake (Primarily)
Ensure Air Tight seal INCLUDING Tank to Pump
Switch to RPM Mode
Increase throttle between 1,000 and 1,200 RPM and engage primer
Once pressure develops, disengage primer and open discharge

41
Q

Formula to determine Nozzle Reaction in smooth bore nozzle.

A
  1. 57xD(squared)xNP

1. 57x Diameter (squared)x Nozzle Pressure

42
Q

Formula to determine Nozzle Reaction in a Fog Nozzle?

A

.0505xQx Square Root of Nozzle Pressure.

.0505x Quantity (GPM) x Square Root of NP

Square Root of 100 (Nozzle Pressure on Fog Nozzle) = 10

43
Q

How much flow or GPM’s will you get on each Intake?
Side Intake?
Rear Intake?
Front Intake?

A

1,750 GPM’s
1500-1750 GPM’s
900 GPM’s

44
Q

When incoming pressure exceeds 50 psi, pump should always be what?

A

In gear.

45
Q

Hoseline Parameters for using the in-line eductor?

A

Must be placed 50 ft from pump panel, and within 200 ft of the nozzle.

46
Q

Pressure to supply Husky Foam System on non CAFS Engines?

A

150 psi.

47
Q

CAFS Air Compressor can run for how long without overheating?

A

2 hours

48
Q

Formula to determine flow through a Smooth Bore Nozzle?

A

29.7 X D squared X Square Root of Nozzle Pressure.

80psi NP = 8.94

49
Q

Flow and Pressure required for JS 10 Nozzle

A

100 GPMs at 100 PSI

2022 Apparatus Tech Test (13 decks)

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