Exam (elaborations)

DC Boiler Exam Prep 2023 (Formulas and constants used for the DC 3rd class boiler exam) QUESTIONS WITH COMPLETE SOLUTIONS.

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Course
DC Boiler

Institution
Liberty University

DC Boiler Exam Prep 2023 (Formulas and constants used for the DC 3rd class boiler exam) QUESTIONS WITH COMPLETE SOLUTIONS. DC Boiler Exam Prep 2023 (Formulas and constants used for the DC 3rd class boiler exam) QUESTIONS WITH COMPLETE SOLUTIONS. DC Boiler Exam Prep 2023 (Formulas and constants us...

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Uploaded on November 5, 2024
Number of pages 44
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

dc boiler exam prep 2023 formulas and constants

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DC Boiler Exam Prep 2023 (Formulas and constants used

for the DC 3rd class boiler exam) QUESTIONS WITH

COMPLETE SOLUTIONS (2024/

2025)

1.Area of a rectangle: Length x Width

2.Area of a Circle: .7854 x Diameter²

3.Volume of a Box: Length x Width x Height

4.Volume of a Cylinder: .7854 x Diameter² x Length

5.Circumference of a Circle: Àx Diameter

6.Unit of Force: Pound (lb)

7.Formula for Force: Pressure ÷ Area

8.Unit of Work: in-lb or ft-lb

,9.Formula for Work: Force x Distance

10.Unit of Power: ft-lb/min

11.Formula for Power: = Work

÷ Time or (Force x Distance) ÷

Time

12.Formula for Mechanical Horsepower: = Power ÷ 33,000 ft-lb/min

13.Fahrenheit to Celsius: °C = (°F - 32) ÷ 1.8

14.Celsius to Fahrenheit: °F = (1.8 x °C) - 32

15.Fahrenheit to Rankine: °R = °F + 460

16.Celsius to Kelvin: K = °C +273.15

17.Charles' First Law: Volume1 / Pressure1 = Volume2 / Pressure2

18.Charles' Second Law: Pressure1 / Temperature1 = Pressure2 /

Temperature2

,19.Boyle's Law: Pressure1 x Volume1 = Pressure2 x Volume2

20.General Gas Law: (Pres1 x Vol1)/ Temp1 = (Pres2 x Vol2)/Temp2

21.Formula for Levers: Resistance x DistanceR = Effort x DistanceE

22.Formula for Inclined Planes: Force x Length = Resistance x Heigh

23.Formula for Wheel & Axel: Force x DistanceF = Resistance x

DistanceR

24.Torque: Force x Radius

25.Safe Working Pressure of a Riveted Boiler (SWP): (Area of

Staybolt x Stress Constant of Staybolt) ÷ Area Covered by Staybolt or =

(a x C) ÷ A

26.Area Covered by Staybolt: = Pitch x Pitch

27.Longitudinal Stress: (P x D x

L) / 2t P = Pressure

, D=

Diameter L

= Length

t = thickness of steel

28.Boiler Heating Surface (tubes) =: =

C x L x # C = Circumference of tubes

L = Length of

tubes # =

Number of tubes

HS = Àx Diameter x Length x Number of Tubes

29.Watts per Boiler Horsepower: 746 Watts

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Exam (elaborations) ·

Exam (elaborations)

DC Boiler Exam Prep 2023 (Formulas and constants used for the DC 3rd class boiler exam) QUESTIONS WITH COMPLETE SOLUTIONS.

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