Hydraulics

Question 1

What is the NP (nozzle pressure) for:

Task force tip (tft) automatic
Elkhart (yellow tip)
All other nozzles

Smooth bore
Smooth bore master stream

Answer 1

Tft 1 1/2”, 1 3/4”, 2”- 75psi
Elkhart- 100 psi
All others- 100psi

Smooth bore-50psi
Smooth bore master stream 80 psi

Question 2

3 types of fog nozzles

Answer 2

Fixed gallonage
Adjustable gallonage
Automatics

Question 3

Tip volume for solid stream nozzle
1 inch:
1 inch and 1/8:
1 in 1/4 inch:

Answer 3

1 inch: 200gpm
1 inch and 1/8: 250gpm
1 in 1/4 inch:300gpm

Question 4

Friction loss formula value for HS:

1"
1.5"
1.75"
2"
2.5"

Answer 4

1"-8
1.5"-4
1.75"-3
2"-2
2.5"-1

Question 5

Friction loss formula value for L:

Answer 5

Hose length in feet divided by 100

Question 6

What is head pressure?

Answer 6

Pressure produced as water moves downhill

Question 7

What is back pressure?

Answer 7

Pressure pushing back against the pump while trying to move water uphill

Question 8

Elevation

Answer 8

Adding .5 PSI per foot to engine pressure for uphill

Subtracting .5 PSI per foot for downhill

Question 9

Handline appliances added to EP formula if the

Flows are 350 GPM or greater

Answer 9

Gated wye =10 psi

Standpipes=20psi

Question 10

Elevation structures

Answer 10

And 5 PSI per floor in multi-story structures do not count the first floor.

Question 11

When is there need for a second line?

Answer 11

If you are exceeding 150 psi then you are losing volume. This is your signal that there is a need for a second line

Question 12

Citizen complaints

What are the four findings?

Answer 12

Unfounded
Exonerated
Not sustained
Sustained

Question 13

Unfounded

Answer 13

The alleged act did not occur

Question 14

Exonerated

Answer 14

The ACT occurred but was justified, lawful proper

Question 15

Not sustained

Answer 15

The investigation produced information insufficient to prove or disapprove the allegation.

Question 16

What time must you call in sick before?

Answer 16

0600hrs

Question 17

Master stream appliance values

Answer 17

Deck gun 15 psi
Portable monitor 15 psi
Ladder pipe 50 psi
Forward pump- the forward pumps engine pressure -150 or 20 psi whichever is greater

Question 18

Which of the following statements best describes the third principle of pressure?

Answer 18

Pressure applied to a confined fluid is transmitted equally in all directions.

Question 19

Which of the following best describes the fifth principle of pressure?

Answer 19

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

Question 20

Which of the following statements best describes the first principle pressure?

Answer 20

Fluid pressure is perpendicular to any surface on which acts

Question 21

Which of the following statements best describes a fourth principle of pressure?

Answer 21

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

Question 22

Which of the following statements best describes the six principal pressure?

Answer 22

The pressure of a liquid at the bottom of a vessel is independent of the shape of the vessel

Question 23

Which of the following best describes a second principal pressure?

Answer 23

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