DC Boiler Exam Prep 2015 Questions and
Answers
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
,DC Boiler Exam Prep 2015 Questions and
Answers
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
,DC Boiler Exam Prep 2015 Questions and
Answers
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
, DC Boiler Exam Prep 2015 Questions and
Answers
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
Lx#
C = Circumference of tubes
L = Length of tubes
Answers
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
,DC Boiler Exam Prep 2015 Questions and
Answers
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
,DC Boiler Exam Prep 2015 Questions and
Answers
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
, DC Boiler Exam Prep 2015 Questions and
Answers
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
Lx#
C = Circumference of tubes
L = Length of tubes
