How many square inches in a square foot

144 sq inches

How many cubic inches in a cubic foot

1728 cu inches

How many cubic inches in a gallon

231 cu inches

12 cubic inches of fresh water weigh

.434 pounds

27.7 cubic inches of fresh water will weigh

1 pound

One gallon of fresh water weighs___ pounds

8.35

One cubic foot of fresh water weighs __ pounds

62.5

How many gallons in one cubic foot

7.481

How many gallons of fresh water in one ton

239.5 (240)

Barometric pressure at sea level is ___ inches

29.92

Atmospheric pressure at sea level is

14.7 psi

Theoretical maximum height of draft is

33.9 feet

volume of a circular tank

v=.7854 x D2x H or 3.14 x r² x D x 7.5 D= avg. dept in feet, 7.5=# of gallons per cubic foot

volume of square/rectangular pools

v= L x W x D x 7.5

Discharge from a nozzle

dis= 30 xD² x square root of the pressure (field) dis= 29.7 x D² x square root of the pressure

Nozzle reaction

Tip 1.5 x D² x NP Fog .0505 x Q x square root of pressure

Discharge from an open butt

29.7 x D² x square root of pressure

to determine pressure when head is known

multiply the head by .434 psi

to determine head when pressure is known

multiply the pressure in psi by 2.304 feet

a column of water 2.304 feet high and 1" square will exert a pressure of

1 pound at the base (1 / .434)

a depth of one foot of water will create a pressure of

.434 psi at the base

FL principle - diameter

FL varies inversely to the 5th power of diameter of hose

FL principle- Length

FL varies directly with the length of lay

FL principle - GPM flow

FL varies appromately with square of increase in gpm (velocity flow)

FL principle - pressure

FL does not vary with pressure

1 cubic inch of mercury (Hg)

.49 psi

Pressure change due to elevation

minus .5 psi per 1000 feet of rise

1 inch of mercury (Hg) creates

1.13 feet of lift

Max. theoretical lift

33.9 ft (14.7x 2.304)(29.9x 1.13)

Max. practical lift

22.6 ft at sea level

2.304 of water column creates

1 psi

1 foot column of water creates

.434 psi at the base

1500 pumper capacity at 150 psi

100% 1500 gpm

1500 pumper capacity at 200 psi

70% 1050 gpm

1500 pumper capacity at 250 psi

50% 750 gpm

Drafting pressure correction

feet of lift + hose FL / divided by 2.304

E5 unit#

6236

E5 make

KME

E5 year

1999

E5 engine type

Catapillar 3406 E

E5 engine horsepower

435 horsepower at 2,100 RPM

E5 fuel tank size

65 gallons

E5 Transmission

Allison HD 4060 PR

E5 2nd brake

Trans Retarder

E5 pump type

Hale Qmax 1500

E5 water tank size

500 gallons

E5 foam tank size

both A Foam at 25 gallons each

E5 foam system

Hale Foam Pro

E5 pressure control device

Hale Relief valve

What is a Relief Valve?

Automatic pressure control device that protects firefighters and equipment by relieveing excess pressure to the intake side of the pump

How does a relief valve operate?

Water pressure vs. spring tension. Spring tension created in the pilot valve holds a needle valve shut. When water pressure over comes spring tension, water is allowed to flow through the needle valve and to the relief piston. The water pressure forces the relief piston down and allows water to flow from the discharge side of the pump to the intake side.

What is the operating range of the relief valve?

75-300 psi

What in (NPP) Net Pump Pressure

When taking water from a hydrant, it is the difference between the intake pressure and the discharge pressure. When drafting, it is the sum of the intake pressure and the discharge pressure. Intake pressures accounts for Lift and Intake hose FL.

Determine flow from smooth bore tips

GPM = 29.7 x d² x √NP

Definition of a Compound Gauge

The intake pressure on a fire pump. Capable of measuring positive or negative pressures.

figure out head pressure (exact)

feet above/below x .434 or for every 1 foot .434 psi is gain or loss.

What is the Indirect Cooler used for?

to control the temperature of the coolant in the apparatus engine during pumping operations

How does the Indirect Cooler work?

water being supplied fire pump passes through a coil mounted inside the cooler/heat exchanger so that it's immersed in the coolant. As cooler water passes through coil, some of the heat is absorbed and dissipated in the pump water and back to tank.

What is a definition of a Centrifugal Pump

Pump with impellar that utilizes centrifugal force to move water

How does the Centrifugal Pump work

imparts velocity to the water and converts it to pressure withing pump itself.

Explain how Theoretical Lift is determined

Although not possible, with a total vacuum at sea level a pump could theorectically lift water 33.9 feet.

Explain Practical Lift

maximum height to which any amount of water may be raised through a hard intake hose to the pump. It varies depending on the atmospheric pressure and the condition of the fire pump and primer.

What is the definition of Nozzle Reaction

it's the counterforce directed against the firefighter on the nozzle by the velocity of water being discharged

How to calculate Nozzle Reaction for a Fog nozzle

.0505 x Q x √NP Q= GPM Flow or 1/2 GPM @100psi

How to calculate Nozzle Reaction for a Smooth Bore nozzle

1.57 x d² x NP

What is the definition of Residual Pressure

means a remainder or what is left. It is a part of the total available pressure not used to flow lines and associated FL

What is the definition of Static Pressure

means at rest or without motion. The pressure in a water system before water flows from a hydrant.

definition of a Triple Combination Pumper

a pumper that carries a fire pump, hose, and water tank

What is a Positive Displacement Pump used for on our engines

it is used as a priming pump to get the water into the centrifugal pump during drafting operations

How many feet does 1 psi raise water in 1"x1' column of water

2.304 ft (2 ft field)

Name 5 things that effect drafting operations

1. Elevation 2. Temperature of water 3. Excessive Feet of lift 4. suction hose too small 5. clogged strainer 6. condition of the pump 7. ground instability

How do you keep hard suction hose from resting on bottom of drafting location

fasten a rope to strainer and tie it off keeping 2 ft off bottom

What is a Tachometer?

dashboard and pump panel guage that measures the engine speed in revolutions per minute (rpm)

What is the Angle of Departure?

angle formed by level ground and a line from the point where the rear tires of vehicle touch the ground to the lowest projection at the rear of the apparatus

At what speed will an emergency vehicle outrun the effective range of it's siren

speeds above 50mph

Traveling distance behind emergency vehicle Code 3

more than one emergency vehicle 300-500 ft.

Name 5 factors that determine placement of Attack Pumper

1. Method of attack 2. Rescue situations 3. Water Supply 4. Exposures 5. Terrain 6. Wind

What is Water Hammer?

Force created by the rapid deceleration of water

What type of Positive Displacement pump does CFD have on their Engines?

Rotary Vane, oil-less except for Br3 has oil

What are the 3 Tips we flow at 50psi (handlines)

1", 1 1/8", and 1 1/4"

What are the GPM's of the 3 handline tips

200, 250, 325

What are te 4 Tips we flow on our Master Stream (Deck Gun)?

1 3/8", 1 1/2", 1 3/4", 2"

What are the GPM's of the master stream tips

500, 600, 800, 1000

Fill in Blank... For every action there is_____

an equal and opposite reaction