# Shared Flashcard Set

## Details

Related Science
Formula`s
104
Science
Not Applicable
06/27/2011

Term
 Density =
Definition
 W/V   Where: W =  weight V = Volume
Term
 °C to °F =
Definition
 (ºC x 9/5) + 32
Term
 °F to °C =
Definition
 = (°F - 32) x 5/9
Term
 Rankine absolute =
Definition
 = °F + 460
Term
 Kelvin absolute =
Definition
 = °C + 273
Term
 1 Btu =
Definition
 the amount of heat required to raise 1 lb. of water 1 degree Farenheit
Term
 1 therm =
Definition
 = 100,000 Btu's
Term
 1 calorie =
Definition
 = the amount of heat required to raise the temperature of 1 gram of water 1 degree Celsius
Term
 Specific heat is the...
Definition
 amount of heat in btu's  required to change the temperature of 1 lb.of a substance 1°F
Term
 Specific heat of water =
Definition
 = 1
Term
 Specific heat of Air =
Definition
 = .24
Term
 Specific heat of Steam =
Definition
 = .48
Term
 Specific heat of ice =
Definition
 = .53
Term
 Combined gas law =
Definition
 V1P1/T1 = V2P2/T2 Where: P = Absolute pressure T = Absolute temperature V = Volume
Term
 Sensible heat =
Definition
 H = S X W X (T1 - T2)  Where : H = Btu's of sensible heat S = specific heat W = weight in lbs T = temperature change
Term
 Fusion is the ...
Definition
 process of changing from a solid to a liquid state
Term
 Law of heat exchange is ? = ?
Definition
 Heat loss = Heat gained
Term
 Btu's required to change ice to water at 32°F =
Definition
 144 Btu's / lb
Term
 Btu's required to change water to steam at 212°F
Definition
 970.4 Btu's /lb
Term
 Water boils at
Definition
 212°F
Term
 Ice melts at
Definition
 32°F
Term
 Charles law =
Definition
 P1/P2 = T1/T2 Where: T = Absolute temperature P = Absolute pressure
Term
 Lussac's Law =
Definition
 V1/V2 = T1/T2 Where: T = Absolute temperature V = Volume
Term
 Combined Gas Law =
Definition
 P1V1/T1 =P2V2/T2 Where: P = Absolute pressure; V = Volume; T = Absolute temperature
Term
 Solution is a ...
Definition
 homogeneous mixture (thoroughly mixed)  of two or more substances, the composition of which may vary  to a maximum limit, called the saturation point.
Term
 Specific gravity is the ...
Definition
 ratio of the density of a substance  to the density of a standard of reference.
Term
 Specific weight is the ...
Definition
 density of a substance divided by the density of water
Term
 Density of mercury =
Definition
 848.70 lbs/cu.ft.
Term
 Density of water =
Definition
 62.4 lbs/cu.ft.
Term
 Cohesion is ...
Definition
 is the property by which similar materials are attracted  to one another
Term
Definition
 the property that causes  dissimilar materials to be attracted to one another
Term
 Capillary action is ...
Definition
 the rising of a liquid in a small space or tube.
Term
 Pressure =
Definition
 P = H x D Where: P = pressure H = height D = density
Term
 Total Force =
Definition
 TF = A X H X D Where: TF = total force A = area H = height  D = density of liquid
Term
 Pascal's Law states ...
Definition
 Pressure applied anywhere to a body of confined or enclosed fluid is trasmitted with  undiminished force in every direction.  This pressure acts at right angles to every portion of the surface of the container, with equal force upon equal areas. Fluids comprise both liquids and gasses, hence Pascal's Law applies to both.
Term
 Area of a circle =
Definition
 d2 x .7854
Term
 Perimeter of a circle =
Definition
 pi x d
Term
 Density of air =
Definition
 .0807 lb/cu.ft  Where:   @ 14.7 psi @32 degrees Farenheit
Term
 Density of Mercury =
Definition
 848.70 lbs/cu.ft.
Term
 The density of mercury is about  _______ times the density  of water
Definition
 13.6
Term
 Absolute Pressure (psia) =
Definition
 Gauge pressure + Atmospheric Pressure or psia = psig + ( inches of HG x .491 lb/cu.in.
Term
 Boyle's law =
Definition
 V2/V1 =P1/P2   Where: P = Absolute Pressure V= Volume
Term
 Volume =
Definition
 Area x Height
Term
 Perfect vacuum is ...
Definition
 the absence of all matter  from a given space
Term
 Partial vacuum is ...
Definition
 any pressure less than atmospheric pressure.
Term
 The principle of Archimedes is ...
Definition
 a body immersed in a fluid loses as much weight  as the weight of the fluid it displaces.
Term
 Flow is measured in
Definition
 gal./min. gal./hr. cu.ft./min lbs/hr.
Term
 What is the definition of the velocity of flow?
Definition
 Velocity describes speed of motion or flow.  Velocity is defined as the rate of motion per unit of time
Term
 Liquids & Gases are    both considered to be ________
Definition
 Fluids
Term
 When discussing machines   the word ________ is used.
Definition
 work
Term
 Power is defined as the ...
Definition
 rate of doing work
Term
 Horsepower =
Definition
 total work (ft.-lb)   divided by 550 x time (sec)
Term
 Work =
Definition
 force x distance
Term
Definition
 M.A. = E.A./R.A.  Where: M.A. = Mechanical advantage E.A. = effort arm R.A. = resistance arm
Term
Definition
 327 °C
Term
 Melting point of Copper is
Definition
 1083 °C
Term
 Melting point of Iron is
Definition
 1530 ºC
Term
 The coefficient of expansion for Copper is
Definition
 9.2e-06
Term
 The coefficient of expansion for cast iron is
Definition
 5.9e-06
Term
 The coefficient of expansion for mild steel is
Definition
 6.3e-06
Term
 The coefficient of expansion for ABS pipe is
Definition
 5e-05
Term
 Expansion Length =
Definition
 EL = L X (T2-T1) X CE Where: EL = expansion length L = original length T = temperature CE = coefficient of expansion
Term
 Tensile strength is the ...
Definition
 force needed to break a rod or wire
Term
 Ductility is the ...
Definition
 ability of a metal to stretch & become deformed without breaking or cracking.
Term
 Malleability is the ...
Definition
 property of a metal that alows it to be hammered  or rolled into sheets, witout causing separation of the molecules
Term
 Definition of elasticity
Definition
 the ability of matter to regain its original form after it has been deformed by some force is called elasticity
Term
 Shear strength is the ...
Definition
 resistance of a metal to being cut (sheared off)
Term
 US gal./cu.ft. =
Definition
 7.48
Term
 Imp. gal./cu.ft. =
Definition
 6.24
Term
 Weight of 1 US gal. =
Definition
 8.33 lbs
Term
 Weight of 1 Imp.gal. =
Definition
 10 lbs
Term
 Travel on a 45° right angle triangle =
Definition
Term
 Total Fall =
Definition
 L x D Where: L = Length D = Distance
Term
 A metal that has been ______   has been softened
Definition
 annealed
Term
 The chemical structure of Methane (natural gas) is
Definition
 CH4
Term
 The chemical structure of Propane is
Definition
 C3H8
Term
 The chemical structure of Butane is
Definition
 C4H10
Term
 Specific gravity of Methane (Vapour)
Definition
 0.6
Term
 Specific gravity of Propane (Vapour)
Definition
 1.5 or 1.52
Term
 Specific gravity of  Butane (Vapour)
Definition
 1.95 or 2
Term
 Limits of flammability Natural Gas
Definition
 4-14%
Term
 Limits of flammability Propane
Definition
 2.4-9.5%
Term
 Limits of flammability Butane
Definition
 1.9-8.5%
Term
 Ignition temperature Natural Gas
Definition
 1,100-1,200°F
Term
 Ignition temperature Propane
Definition
 920-1,020°F
Term
 Ignition temperature Butane
Definition
 900-1,000°F
Term
 Maximum flame temp. Natural Gas
Definition
 3,400-3,550°F
Term
 Maximum flame temp. Propane
Definition
 3,600°F
Term
 Maximum flame temp. Butane
Definition
 3,625°F
Term
 Maximum flame speed Natural gas
Definition
 25"/sec.
Term
 Maximum flame speed Propane
Definition
 32"/sec.
Term
 Maximum flame speed Butane
Definition
 33"/sec
Term
 1ml =
Definition
 1 cm3
Term
 1 litre =
Definition
 1,000 cm3
Term
 1 m3 =
Definition
 1,000,000 cm3 = 1,000 litres
Term
 1 litre is equal to how many grams?
Definition
 1,000 grams
Term
 Water is most dense at what °F?
Definition
 39°F
Term
 Water expands at what aproximate rate for each °F temperature rise
Definition
 .00023%
Term
 1 Kcal =
Definition
 1,000 calories
Term
 What is the constant for converting Kcal to Btu's
Definition
 1 Kcal X 0.00397 = 3.97 Btu's
Term
 1 Btu equals how many kilowatts
Definition
 0.00293
Term
 What is the pH value for water,  that is considered to be neutral
Definition
 7
Term
 The theoretical distance a pump can lift water is
Definition
 34'
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