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DC Boiler Exam Prep 2015 CORRECT QUESTIONS & ANSWERS(RATED A) $13.99   Add to cart

Exam (elaborations)

DC Boiler Exam Prep 2015 CORRECT QUESTIONS & ANSWERS(RATED A)

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  • Course
  • DC Boiler
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  • DC Boiler

Area of a rectangle - ANSWER Length x Width Area of a Circle - ANSWER .7854 x Diameter² Volume of a Box - ANSWER Length x Width x Height Volume of a Cylinder - ANSWER .7854 x Diameter² x Length

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  • November 8, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • dc boiler exam
  • dc boiler
  • DC Boiler
  • DC Boiler
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shantelleG
DC Boiler Exam Prep 2015 CORRECT
QUESTIONS & ANSWERS(RATED A)

Area of a rectangle - ANSWER Length x Width



Area of a Circle - ANSWER .7854 x Diameter²



Volume of a Box - ANSWER Length x Width x Height



Volume of a Cylinder - ANSWER .7854 x Diameter² x Length



Circumference of a Circle - ANSWER π x Diameter



Unit of Force - ANSWER Pound (lb)



Formula for Force - ANSWER Pressure ÷ Area



Unit of Work - ANSWER in-lb or ft-lb



Formula for Work - ANSWER Force x Distance



Unit of Power - ANSWER ft-lb/min



Formula for Power - ANSWER = Work ÷ Time

or (Force x Distance) ÷ Time



Formula for Mechanical Horsepower - ANSWER = Power ÷ 33,000 ft-lb/min

, Fahrenheit to Celsius - ANSWER °C = (°F - 32) ÷ 1.8



Celsius to Fahrenheit - ANSWER °F = (1.8 x °C) - 32



Fahrenheit to Rankine - ANSWER °R = °F + 460



Celsius to Kelvin - ANSWER K = °C +273.15



Charles' First Law - ANSWER Volume1 / Pressure1 = Volume2 / Pressure2



Charles' Second Law - ANSWER Pressure1 / Temperature1 = Pressure2 / Temperature2



Boyle's Law - ANSWER Pressure1 x Volume1 = Pressure2 x Volume2



General Gas Law - ANSWER (Pres1 x Vol1)/ Temp1 = (Pres2 x Vol2)/Temp2



Formula for Levers - ANSWER Resistance x DistanceR = Effort x DistanceE



Formula for Inclined Planes - ANSWER Force x Length = Resistance x Height



Formula for Wheel & Axel - ANSWER Force x DistanceF = Resistance x DistanceR



Torque - ANSWER Force x Radius



Safe Working Pressure of a Riveted Boiler (SWP) - ANSWER (Area of Staybolt x Stress Constant of
Staybolt) ÷ Area Covered by Staybolt or = (a x C) ÷ A



Area Covered by Staybolt - ANSWER = Pitch x Pitch

, Longitudinal Stress - ANSWER (P x D x L) / 2t

P = Pressure

D = Diameter

L = Length

t = thickness of steel



Boiler Heating Surface (tubes) = - ANSWER = C x L x #

C = Circumference of tubes

L = Length of tubes

# = Number of tubes

HS = π x Diameter x Length x Number of Tubes



Watts per Boiler Horsepower - ANSWER 746 Watts



Horsepower formula - ANSWER = ft-lb/min ÷ 33000 ft-lb/min



ft-lb formula for a pump - ANSWER = gpm x 8.33 x head (ft)



Factor of Evaporation (FE) = - ANSWER = [Hs - (tfw-32)] ÷ 970.3

Hs = Enthalpy of steam

tfw = temperature of feed water



Latent Heat of Vaporization for Water - ANSWER 970.3 Btu/lb



Latent Heat of Fusion for Water - ANSWER 144 Btu/lb



1 Boiler Horsepower = x lbs of steam generator per hour - ANSWER 34.5 lbs/hr



1 Boiler Horsepower = x Btu/hr - ANSWER 33,475 Btu/hr

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