DC Boiler Exam ACTUAL EXAM COMPLETE 240
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||ALREADY GRADED A+
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Terms in this set (216)
Area of a rectangle Length x Width
Area of a Circle .7854 x Diameter²
Volume of a Box Length x Width x Height
Volume of a Cylinder .7854 x Diameter² x Length
Circumference of a Circle π x Diameter
Unit of Force Pound (lb)
Formula for Force Pressure ÷ Area
Unit of Work in-lb or ft-lb
Formula for Work Force x Distance
Unit of Power ft-lb/min
= Work ÷ Time
Formula for Power
or (Force x Distance) ÷ Time
Formula for Mechanical = Power ÷ 33,000 ft-lb/min
Horsepower
Fahrenheit to Celsius °C = (°F - 32) ÷ 1.8
Celsius to Fahrenheit °F = (1.8 x °C) - 32
Fahrenheit to Rankine °R = °F + 460
, Celsius to Kelvin K = °C +273.15
Charles' First Law Volume1 / Pressure1 = Volume2 / Pressure2
Charles' Second Law Pressure1 / Temperature1 = Pressure2 / Temperature2
Boyle's Law Pressure1 x Volume1 = Pressure2 x Volume2
General Gas Law (Pres1 x Vol1)/ Temp1 = (Pres2 x Vol2)/Temp2
Formula for Levers Resistance x DistanceR = Effort x DistanceE
Formula for Inclined Force x Length = Resistance x Height
Planes
Formula for Wheel & Axel Force x DistanceF = Resistance x DistanceR
Torque Force x Radius
Safe Working Pressure of (Area of Staybolt x Stress Constant of Staybolt) ÷
a Riveted Boiler (SWP) Area Covered by Staybolt or = (a x C) ÷ A
Area Covered by = Pitch x Pitch
Staybolt
(P x D x L) / 2t
P = Pressure
Longitudinal Stress D = Diameter
L = Length
t = thickness of steel
=CxLx#
C = Circumference of tubes
Boiler Heating Surface
L = Length of tubes
(tubes) =
# = Number of tubes
HS = π x Diameter x Length x Number of Tubes
Watts per Boiler 746 Watts
Horsepower
Horsepower formula = ft-lb/min ÷ 33000 ft-lb/min
ft-lb formula for a pump = gpm x 8.33 x head (ft)
= [Hs - (tfw-32)] ÷ 970.3
Factor of Evaporation
Hs = Enthalpy of steam
(FE) =
tfw = temperature of feed water
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||ALREADY GRADED A+
Save
Terms in this set (216)
Area of a rectangle Length x Width
Area of a Circle .7854 x Diameter²
Volume of a Box Length x Width x Height
Volume of a Cylinder .7854 x Diameter² x Length
Circumference of a Circle π x Diameter
Unit of Force Pound (lb)
Formula for Force Pressure ÷ Area
Unit of Work in-lb or ft-lb
Formula for Work Force x Distance
Unit of Power ft-lb/min
= Work ÷ Time
Formula for Power
or (Force x Distance) ÷ Time
Formula for Mechanical = Power ÷ 33,000 ft-lb/min
Horsepower
Fahrenheit to Celsius °C = (°F - 32) ÷ 1.8
Celsius to Fahrenheit °F = (1.8 x °C) - 32
Fahrenheit to Rankine °R = °F + 460
, Celsius to Kelvin K = °C +273.15
Charles' First Law Volume1 / Pressure1 = Volume2 / Pressure2
Charles' Second Law Pressure1 / Temperature1 = Pressure2 / Temperature2
Boyle's Law Pressure1 x Volume1 = Pressure2 x Volume2
General Gas Law (Pres1 x Vol1)/ Temp1 = (Pres2 x Vol2)/Temp2
Formula for Levers Resistance x DistanceR = Effort x DistanceE
Formula for Inclined Force x Length = Resistance x Height
Planes
Formula for Wheel & Axel Force x DistanceF = Resistance x DistanceR
Torque Force x Radius
Safe Working Pressure of (Area of Staybolt x Stress Constant of Staybolt) ÷
a Riveted Boiler (SWP) Area Covered by Staybolt or = (a x C) ÷ A
Area Covered by = Pitch x Pitch
Staybolt
(P x D x L) / 2t
P = Pressure
Longitudinal Stress D = Diameter
L = Length
t = thickness of steel
=CxLx#
C = Circumference of tubes
Boiler Heating Surface
L = Length of tubes
(tubes) =
# = Number of tubes
HS = π x Diameter x Length x Number of Tubes
Watts per Boiler 746 Watts
Horsepower
Horsepower formula = ft-lb/min ÷ 33000 ft-lb/min
ft-lb formula for a pump = gpm x 8.33 x head (ft)
= [Hs - (tfw-32)] ÷ 970.3
Factor of Evaporation
Hs = Enthalpy of steam
(FE) =
tfw = temperature of feed water
