Month 12; Hydraulics Review

Question 0

What do we pump a preconnect at?

Answer 0

120

Question 1

What do we pump a Hotel Pack at?

Answer 1

110

Question 2

What do we pump our blitz line at?

Answer 2

110

Question 3

What do we pump our 200 footer at?

Answer 3

130

Question 4

What is the GPM and EP for Elkhart Select O Matic Master Stream?

Answer 4

350-1000 GPM @100 PSI

500-1000 GPM @100 PSI

Question 5

What is the nozzle pressure for a smooth bore nozzle handline?

Answer 5

50 PSI

Question 6

What is the GPM and PSI for 1/2 Smooth Bore Nozzle?

Answer 6

50 GPM

55 PSI

Question 7

What is the GPM and PSI for 7/8 Smooth Bore Nozzle?

Answer 7

160 GPM

110 PSI

Question 8

What is the GPM and PSI for 15/16 Smooth Bore Nozzle?

Answer 8

190 GPM

135 PSI

Question 9

What is the GPM and PSI for 1 Smooth Bore Nozzle?

Answer 9

200 GPM

65 PSI

Question 10

What is the GPM and PSI for 1 1/8 Smooth Bore Nozzle?

Answer 10

• 250 GPM

- 70 PSI

Question 11

What is the GPM and PSI for 1 1/4 Smooth Bore Nozzle?

Answer 11

GPM 300

EP 75

Question 12

What is the tip pressure for a smooth bore master stream nozzle?

Answer 12

80 PSI

Question 13

What is the GPM for a 1 3/8 Master Stream?

Answer 13

500 GPM

Question 14

What is the GPM for a 1 1/2 Smooth Bore Master Stream?

Answer 14

600 GPM

Question 15

What is the GPM 1 3/4 Smooth Bore Master Stream?

Answer 15

800 GPM

Question 16

What is the GPM for a 2 Smooth Bore Master Stream?

Answer 16

1000 GPM

Question 17

What is your starting point for pressure with TK 91 with a Combination Nozzle?

Answer 17

135 EP

• 100 Nozzle Pressure
• 25 For Monitor
• 10 For the Pipe

Question 18

How does the 2 1/2” Drop Zero Method Work?

Answer 18

1. Find GPM through the hose
2. Subtract Zero from that number
3. If flow is less than 450 GPM, subtract 10
4. Resulting number is FL per 100’ of hose.
   This formula can be used for dual 2 1/2” lines by first dividing flow by 2

Question 19

What is the elevation loss per floor?

Answer 19

5 PSI

Question 20

What is the pressure when relay pumping?

Answer 20

Between 20-90 PSI

-Shoot for the middle 50 PSI

Question 21

What is your starting point with TK 91 with a Smooth Bore Nozzle?

Answer 21

• 115 PSI

- 80 for Nozzle, 25 for monitor, 10 for stick

Question 22

What does a FDC sprinkler system require?

Answer 22

150 PSI

Question 23

What is the intake relief valve set at?

Answer 23

120-150 PSI by the mechanic

Question 24

What is the discharge relief valve set at?

Answer 24

10-20 psi above EP

Question 25

What does 1 Gallon of water weigh?

Answer 25

8.33 lbs

Question 26

How many cubic inches in one gallon of water?

Answer 26

231 cubic inches

Question 27

How many cubic ft in 1 gallon of water?

Answer 27

.1337 cubic ft

Question 28

How many cubic inches are in one cubic ft?

Answer 28

1728 cubic inches

Question 29

How many gallons in 1 cubic ft of water?

Answer 29

7.481 Gallons

Question 30

How much does 1 cubic ft of water weigh?

Answer 30

62.5 lbs

Question 31

A 1 ft column of water requires what psi?

Answer 31

.434

Question 32

1 psi will lift water how far?

Answer 32

2.304 ft.

Question 33

1 cubic ft of water a second equals how many gpm?

Answer 33

449 gpm

Question 34

When extending a preconnect add what psi for a 1 3/4" hose?

Answer 34

10 PSI

Question 35

When extending a preconnect add what psi for a 2 1/2" hose?

Answer 35

5 PSI

Question 36

What is the friction Loss Formula

Answer 36

FL = C x Q^2 X L

Question 37

What is the friction loss coefficient for 1 3/4" hose?

Answer 37

15.5

Question 38

What is the friction loss coefficient for 2 1/2" hose?

Answer 38

2

Question 39

What is the friction loss coefficient for dual 2 1/2"?

Answer 39

.5

Question 40

What is the friction loss coefficient for 5"?

Answer 40

.08

Question 41

What is the formula for Smooth Bore GPM?

Answer 41

GPM = 29.7 x D^2 X Square Root of NP

Question 42

#1 Friction Loss Principle

Answer 42

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

Question 43

2nd Principle of Friction Loss

Answer 43

When hoses are the same size, friction loss varies approximately with the square of the increase in the velocity of the flow. ***As GPM Increases then Friction Loss Increases***

Question 44

Third Principle of Friction Loss

Answer 44

For the same discharge, friction loss varies inversely as the fifth power of the diameter of the hose. ***Larger the hose then less friction loss***

Question 45

4th Principle Friction Loss

Answer 45

For a given flow velocity, friction loss is approximately the same, regardless of the pressure on the water.

Question 46

First Principle of Pressure

Answer 46

Fluid Pressure is perpendicular to any surface on which it acts..

Question 47

Second Principle of Pressure

Answer 47

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

Question 48

Third Principle of Pressure

Answer 48

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

Question 49

Fourth Principle of Pressure

Answer 49

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

Question 50

Fifth Principle of Pressure

Answer 50

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

Question 51

Sixth Principle of Pressure

Answer 51

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