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DC BOILER EXAM PREP 2025 UPDATED
ACTUAL EXAM WITH CORRECT
SOLUTIONS.
Area of a rectangle - correct answer- Length x Width
Area of a Circle - correct answer- .7854 x Diameter²
Volume of a Box - correct answer- Length x Width x Height
Volume of a Cylinder - correct answer- .7854 x Diameter² x
Length
Circumference of a Circle - correct answer- π x Diameter
Unit of Force - correct answer- Pound (lb)
Formula for Force - correct answer- Pressure ÷ Area
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Unit of Work - correct answer- in-lb or ft-lb
Formula for Work - correct answer- Force x Distance
Unit of Power - correct answer- ft-lb/min
Formula for Power - correct answer- = Work ÷ Time
or (Force x Distance) ÷ Time
Formula for Mechanical Horsepower - correct answer- = Power
÷ 33,000 ft-lb/min
Fahrenheit to Celsius - correct answer- °C = (°F - 32) ÷ 1.8
Celsius to Fahrenheit - correct answer- °F = (1.8 x °C) - 32
Fahrenheit to Rankine - correct answer- °R = °F + 460
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Celsius to Kelvin - correct answer- K = °C +273.15
Charles' First Law - correct answer- Volume1 / Pressure1 =
Volume2 / Pressure2
Charles' Second Law - correct answer- Pressure1 /
Temperature1 = Pressure2 / Temperature2
Boyle's Law - correct answer- Pressure1 x Volume1 =
Pressure2 x Volume2
General Gas Law - correct answer- (Pres1 x Vol1)/ Temp1 =
(Pres2 x Vol2)/Temp2
Formula for Levers - correct answer- Resistance x DistanceR =
Effort x DistanceE
Formula for Inclined Planes - correct answer- Force x Length =
Resistance x Height
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Formula for Wheel & Axel - correct answer- Force x DistanceF
= Resistance x DistanceR
Torque - correct answer- Force x Radius
Safe Working Pressure of a Riveted Boiler (SWP) - correct
answer- (Area of Staybolt x Stress Constant of Staybolt) ÷ Area
Covered by Staybolt or = (a x C) ÷ A
Area Covered by Staybolt - correct answer- = Pitch x Pitch
Longitudinal Stress - correct answer- (P x D x L) / 2t
P = Pressure
D = Diameter
L = Length
t = thickness of steel
Boiler Heating Surface (tubes) = - correct answer- = C x L x #
C = Circumference of tubes
DC BOILER EXAM PREP 2025 UPDATED
ACTUAL EXAM WITH CORRECT
SOLUTIONS.
Area of a rectangle - correct answer- Length x Width
Area of a Circle - correct answer- .7854 x Diameter²
Volume of a Box - correct answer- Length x Width x Height
Volume of a Cylinder - correct answer- .7854 x Diameter² x
Length
Circumference of a Circle - correct answer- π x Diameter
Unit of Force - correct answer- Pound (lb)
Formula for Force - correct answer- Pressure ÷ Area
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Unit of Work - correct answer- in-lb or ft-lb
Formula for Work - correct answer- Force x Distance
Unit of Power - correct answer- ft-lb/min
Formula for Power - correct answer- = Work ÷ Time
or (Force x Distance) ÷ Time
Formula for Mechanical Horsepower - correct answer- = Power
÷ 33,000 ft-lb/min
Fahrenheit to Celsius - correct answer- °C = (°F - 32) ÷ 1.8
Celsius to Fahrenheit - correct answer- °F = (1.8 x °C) - 32
Fahrenheit to Rankine - correct answer- °R = °F + 460
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Celsius to Kelvin - correct answer- K = °C +273.15
Charles' First Law - correct answer- Volume1 / Pressure1 =
Volume2 / Pressure2
Charles' Second Law - correct answer- Pressure1 /
Temperature1 = Pressure2 / Temperature2
Boyle's Law - correct answer- Pressure1 x Volume1 =
Pressure2 x Volume2
General Gas Law - correct answer- (Pres1 x Vol1)/ Temp1 =
(Pres2 x Vol2)/Temp2
Formula for Levers - correct answer- Resistance x DistanceR =
Effort x DistanceE
Formula for Inclined Planes - correct answer- Force x Length =
Resistance x Height
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Formula for Wheel & Axel - correct answer- Force x DistanceF
= Resistance x DistanceR
Torque - correct answer- Force x Radius
Safe Working Pressure of a Riveted Boiler (SWP) - correct
answer- (Area of Staybolt x Stress Constant of Staybolt) ÷ Area
Covered by Staybolt or = (a x C) ÷ A
Area Covered by Staybolt - correct answer- = Pitch x Pitch
Longitudinal Stress - correct answer- (P x D x L) / 2t
P = Pressure
D = Diameter
L = Length
t = thickness of steel
Boiler Heating Surface (tubes) = - correct answer- = C x L x #
C = Circumference of tubes
