DC Boiler Exam Prep Exam Study Guide.
Area of a rectangle - answerLength x Width
Area of a Circle - answer.7854 x Diameter²
Volume of a Box - answerLength x Width x Height
Volume of a Cylinder - answer.7854 x Diameter² x Length
Circumference of a Circle - answerπ x Diameter
Unit of Force -...
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
Longitudinal Stress - answer✔(P x D x L) / 2t
P = Pressure
D = Diameter
L = Length
t = thickness of steel
Boiler Heating Surface (tubes) = - answer✔= C x L x #
C = Circumference of tubes
L = Length of tubes
# = Number of tubes
HS = π x Diameter x Length x Number of Tubes
Watts per Boiler Horsepower - answer✔746 Watts
Horsepower formula - answer✔= ft-lb/min ÷ 33000 ft-lb/min
ft-lb formula for a pump - answer✔= gpm x 8.33 x head (ft)
Factor of Evaporation (FE) = - answer✔= [Hs - (tfw-32)] ÷ 970.3
Hs = Enthalpy of steam
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