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### 93 Cards in this Set

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 fresh water weighs _____ 8.33 lbs or 62.5 lb/ft3 specific heat measure of heat absorbing capacity of a substance latent heat of vaporization amount of heat absorbed by substance when it changes from liquid to vapor Each pound of water requires ___btu of additional heat to convert to steam 970 one gallon of water will absorb _____ of heat if all the water is converted to steam 9,346 btu at 212 degrees water expands approximately ____ times its original volume 1700 specific gravity the density of liquids in relation to water the weight of 1 cubic foot of water is ___ 62.5 lbs a 1 sq inch column of water one foot high exerts ____ at its base .434 psi Principles of pressure 1. fluid is ________to any surface on which it acts perpindicular Principles of pressure 2. fluid pressure at a point at rest is the _____ in all directions same Principles of pressure 3. pressure applied to a confined fluid from without is _________________________ transmitted equally in all directions Principles of pressure 4. the pressure of a liquid in an open container is ____________to its depth proportional Principles of pressure 5. the pressure of a liquid in an open vessel is ___________ to the density of the liquid. proportional Principles of pressure 6. the pressure of a liquid at the bottom of a vessel is _______ of the shape of the vessel independent atmospheric pressure 14.7 psi a pressure of 1 psi makes a column of mercury ____ high 2.04 inches psig reads _____ psi in addition to atmospheric pressure psia reads actual atmospheric pressure calculating head pressure height divided by 2.304 static pressure stored potential energy residual pressure part of the total available pressure not used to overcome friction loss. what is left The center line of a pump or the bottom of a static water supply source above or below groundd level elevation the position of an object above or below sea level altitude atmospheric pressure drops by ____ every thousand feet .5 psi 1st principal of friction loss if all conditions remain the same, FL varies directly with the length of hose 2nd principle of FL when hoses are the same size, friction loss varies approx with the square of the increase in the velocity of flow 3rd principle of FL for the same discharge, FL varies inversely as th fifth power of the diameter of the hose 4th principle of FL for a given flow velocity, FL is approx the same, regardless of the pressure on the water when the diameter of a hose ____ the area of the hose opening increases _______ doubles, four times recommended supply size for fire hydrant mains in residential areas 6" residential and business areas should have ___" cross connecting mains every ____' 8, 600 recommended size of hydrant supply main in business and industrial areas 8" ___" mains may be used on long mains not cross connected at frequent points 12" average amount of water used in a system over 1 year average daily consumption max total amount of water that was used during any 24 hour period over 3 years maximum daily consumption maximum amount of water used in any 1 hour interval over the course of a day peak hourly consumption solid stream mozzles length is ________times its diameter 1- 1.5 times solid stream handline ____psi 50 solid stream master stream ___psi 80 GPM formula 29.7x d2 x sq rt NP most constant flow nozzles should be operated at -___psi 100 minimum flow setting for interior structural firefighting is_____ 95-100 gpm high pressure fog nozzles operate at up to ____psi and flow ____gpm 800, 8-15gpm maximum amount of water you can safely flow through a handline ______ 350 gpm smooth bore master stream operated at ____ and fog master operated at ______ 80psi, 100psi master stream flows are usually _____ or grreater 350 gpm at a pressure of 100 psi a chimney nozzle usually produces ____ gpm 1.5-3 practical working limits of velocity of fire streams 60-120 feet per second solid stream nozzles operated at 50 psi with a tip up to 1.5" larger than that psi raised to 65 nozzle reaction formula for solid stream NR= 1.57xd2xNP nozzle reaction formula for fog NR=0.0505xQx sq rt NP friction loss equation FL=CQ2L Q divided by 100 L divided by 100 1 3/4 with 1 1/2 couplings coefficient 15.5 2 1/2 " coefficient 2 5" coefficient .08 4" coefficient 0.2 1" booster coefficient 150 appliance FL only counted with flow over _____ 350 gpm appliance FL when flowing over 350 gpm 10 psi FL in master stream appliance regardless of flow 25 psi elevation formula for height EP=0.5H (height) elevation formula for stories EP=5psi x (number of stories minus 1) FL in equal length hoselines whose diameters are the same ______ perform calc on only one line siamesed hose lines of equal length have FL of ____ that of a single hoseline at same pressure 25% three siamesed hoselines have FL ____ of that of s single line with same nozzle pressure 10% FL with multiple uneven lines is based on ______ the highest loss aerial devices have FL of _____ 25 psi pump discharge pressure formula PDP=NP+TPL net pump discharge pressure actual presure produced by pump discharge pressure minus intake pressure NFPA 1901 allows flowmeters to be used instead of pressure gauges on all disharges ___to___ 1.5-3" flowmeters should be accurate to a tolerance of _____ +or- 3% multi cylinder piston pumps can provide pressures up to ___ for high pressure fog 1000 psi amount of water a rotary gear pump can priduce depends on______ the size of pockets in the gears and speed of rotation one of the most common types of pumps used to prime centrifugal pumps is ____ rotary vane pump centrifugal pump impeller does what transmits energy in the form of velocity to the water centrifugal pump casing does what collects water and confines it in order to convert velocity into pressure doubling the speed of the impeller results in ___times as much pressure 4 single stage centrigugal pumps provide up to _____gpm 2000 pumping in parallel provides more ____ volume pumping in series provides more_____ pressure most pump manufacturers reccomen keeping pump in ____ position until you have to flow more than ____ rated capacity series (pressure), two thirds maximum discharge pressure that changeover valve should be operated at is______ 50 psi pumping capacity of auxilliary engine driven pumps is generally ____ 500 gpm with engine idling and pump engaged most speedometers will read _______ 10-15 mph the piping system and pump must be able to withstand a hydrostatic test of ___psi 500 pumpers with capacity of 500gpm or less should be capable of flowing _____ from their booster tank 250 gpm pumpers with capacity greater than 500 gpm should be able to flow at least _____ 500 gpm apparatus with pump capacity of 750 gpm or greater must have ____ _____ discharges at least two 2.5" apparatus with water tanks less than 1000 gallons must have a ___" tank fill line 2" pressure control devices must operate within ___to___ seconds after pressure rises and cannot exceed ____ above set level 3-10, 30psi master intake gauge is calibrated from ___to___ positive pressure and ___to___ vacuum 0-600 psi, 0-30 inches as vacuum reading approaches ___ pump is near its max capacity 20"