DC Boiler Exam Prep (Formulas and constants used for the DC 3rd class boiler exam) with Complete Solutions
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Module
DC Boiler
Institution
DC Boiler
DC Boiler Exam Prep (Formulas and constants used for the DC 3rd class boiler exam) with Complete SolutionsDC Boiler Exam Prep (Formulas and constants used for the DC 3rd class boiler exam) with Complete SolutionsDC Boiler Exam Prep (Formulas and constants used for the DC 3rd class boiler exam) with...
Celsius to Fahrenheit - ANSWER-°F = (1.8 x °C) - 32
Fahrenheit to Rankine - ANSWER-°R = °F + 460
Celsius to Kelvin - ANSWER-K = °C +273.15
Charles' First Law - ANSWER-Volume1 / Pressure1 = Volume2 / Pressure2
Charles' Second Law - ANSWER-Pressure1 / Temperature1 = Pressure2 /
Temperature2
Boyle's Law - ANSWER-Pressure1 x Volume1 = Pressure2 x Volume2
General Gas Law - ANSWER-(Pres1 x Vol1)/ Temp1 = (Pres2 x Vol2)/Temp2
Formula for Levers - ANSWER-Resistance x DistanceR = Effort x DistanceE
Formula for Inclined Planes - ANSWER-Force x Length = Resistance x Height
Formula for Wheel & Axel - ANSWER-Force x DistanceF = Resistance x DistanceR
Torque - ANSWER-Force x Radius
Safe Working Pressure of a Riveted Boiler (SWP) - ANSWER-(Area of Staybolt x Stress
Constant of Staybolt) ÷ Area Covered by Staybolt or = (a x C) ÷ A
, Area Covered by Staybolt - ANSWER-= Pitch x Pitch
Specific Gravity of Mercury (Hg) - ANSWER-13.57
equivalent psi of water of 1" of Mercury - ANSWER-.491 psi
Atmospheric pressure in psi - ANSWER-14.7 psi
Atmospheric pressure in in.Hg. - ANSWER-29.29 in.HG
Lbs of air required to burn 1 lb of fuel - ANSWER-15 lbs
% of oxygen in air - ANSWER-21%
Lbs of air required to burn 1 lb of carbon - ANSWER-11.53 lbs
Percentage of condensate return (Rc) - ANSWER-= [Mc-Fc)/(Mc - CC)] x 100
Mc = Make-up conductivity
Fc = Feedwater conductivity
Cc = Condensate conductivity
Conversion factor for grains per gallon to parts per million - ANSWER-17.1
Weight of column of mercury in psi = - ANSWER-= 13.57 x .433 x Height
Formula for the horsepower requirement for a pump = - ANSWER-(Q x 8.33 x H x
sp.gr. ) / 33,000 x n
Q = flow rate in gpm
H = total head
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