DC Boiler Exam Prep verified questions with correct
solutions A+ Grade
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
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
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
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
solutions A+ Grade
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
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
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
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
