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Flashcards in Hydraulics Deck (60):
0

What is 100% capacity of the pump?

150 p.s.i.

1

What is 70% capacity of the pump

200 p.s.i.

2

What is 50% capacity of the pump?

250 p.s.i.

3

What is the G.P.M. for smooth bore nozzles on the monitor?

1 1/4 = 400 gpm
1 1/2 = 600 gpm
1 3/4 = 800 gpm
2 = 1000 gpm
1 3/8 = 500 gpm
1 5/8 = 700 gpm
1 7/8 = 900 gpm
take the first number of the fraction and add 2

4

What is head pressure per foot

.434 psi

5

What is head pressure per floor

5 psi

6

1 lb of water will rise?

2.304 feet when 1 psi is applied. at atmospheric pressure (14.7 psi) it will rise 33.86 feet

7

Gallons per cubic foot

7.48 gallons

8

pounds per cubic foot

62.5

9

pounds per gallon

8.33 pounds

10

cubic inches per gallon

231 cubic inches

11

Stand pipe friction loss

25 psi

12

Monitor friction loss

15 psi

13

4 way valve friction loss

15 psi

14

wye or siamese friction loss

0 psi

15

volume of rectangle

C = LWH x 7.5

16

volume of cylinder

C = 6 times D squared times H

17

Weight of cylinder

W = 6 times D squared times H times 8.33

18

Weight of rectangle

W = LWH times 62.5

19

Calculate GPM

29.71 times d squared times the square root of p = GPM

20

Calculate friction loss

2 times Q squared plus Q

21

Relay Pumping

EP = FL + 20 not to exceed 200 psi

22

Initial Operating Pressure

130 psi

23

Sprinkler System/FDC Operating Pressure

150 psi

24

Calculate Friction Loss Below 100 gpm flowing

2Q squared + 1/2Q

25

Handheld Fog nozzle pressure

100 psi

26

Handheld smooth bore nozzle pressure

50 psi

27

Master stream fog nozzle pressure

100 psi

28

Master stream smooth bore nozzle pressure

80 psi

29

FL factor for 4 inch hose

.25

30

FL factor for 1 3/4 inch hose

2

31

FL factor for 1 1/2 inch hose

4

32

FL factor for 1 inch hose

11

33

FL factor for 3/4 inch hose

24

34

Available hydrant flow with less than 10% drop on compound gauge

3 like gpm lines

35

Available hydrant flow with between 11 and 15% drop on compound gauge

2 like gpm lines

36

Available hydrant flow with between 16 to 25% drop on compound gauge

1 like gpm line

37

GPM for handheld smooth bore nozzles

1 inch = 200 gpm
1 1/8 inch = 250 gpm
1 1/4 inch = 325 gpm

38

What is max theoretical lift in regards to drafting

The distance 1 psi will raise 1 pound of water at any given elevation. 2.304 feet times atmospheric pressure (at sea level max lift is 33.86)

39

What is practical lift in regards to drafting

2/3 the height of max theoretical lift, which turns out to be roughly 22'

40

What is the nozzle pressure of the TFT Automatic nozzle on truck 11?

80 psi

41

What is the formula for smooth bore nozzle reaction?

NR = 1.57 times diameter squared times NP

42

What is the formula for automatic nozzle reaction?

NR = .0505 times diameter squared times the square root of NP

43

What is the definition of elevation?

The height of discharge relative to the eye of the pump

44

What is a BTU

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

45

What are the 5 characteristic of water?

Absorbs heat, no tensile strength, incompressible, readily available, non toxic

46

When pumping the truck, how many supply lines are used?

3, 2 1/2 lines

47

How many GPM's is the trucks master stream

1000-1250 gpm

48

What is the maximum distance one type 1 engine can supply three lines to the truck?

500 feet

49

What is the FL on the Ladder Trucks Trimese?

25 psi

50

How is friction loss calculated in the ladder pipe on truck 11

.5 psi per foot of elevation above the turntable. Max FL fully extended would be 50 psi

51

What are the 2 different options for pumping the truck

Option 1 - engine lays lines to and from the truck, sits at the hydrant and makes all calculations from the engine to the tip of the ladder pipe to achieve the desired gpm.
Option 2 - engine lays lines to and from the truck, sits at the hydrant and relay pumps to the truck (FL + 20 psi) and the truck engineer pumps from the truck panel to the tip.

52

What is latent heat of vaporization

The amount of additional heat energy required to convert one pound of water, at its boiling point, to vapor. For water it's 970 btu's

53

When pumping from the tank and charging the line, what should the ff be told

He is on tank water only

54

What is dependable lift in regards to drafting

The height at which water can be lifted to provide enough gpm for a reliable fire flow

55

How much does pump capacity decrease with 15' and 20' suction hoses when drafting

70% capacity at 15'
60% capacity at 20'

56

During constant pressure relay pumping, how much hose does each engine lay

750 feet, unless the supply engine is within 100 feet of the source, then 850 feet can be laid

57

What pressure gets pumped during constant pressure relay pumping

130 psi

58

When constant pressure relay pumping, how much should be left on the intake gauge

20 psi for safety, and to ensure the pump does not cavitat

59

During constant pressure relay pumping, when only pumping one line, how many feet can each engine lay

1,000-1,500 feet