DC BOILER ACTUAL EXAM SCRIPT 2026 QUESTIONS WITH SOLUTIONS GRADED A+

DC BOILER ACTUAL EXAM SCRIPT 2026
QUESTIONS WITH SOLUTIONS GRADED A+

◉ 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