3A2 ABSA EXAM QUESTIONS AND
ANSWERS (VERIFIED AND UPDATED)
Operating pressure - ANS Pressure at which a system operates, measured in kPa.
B-51 code - ANS Regulates safety standards for boilers and components.
B31.3 - ANS Code for Chemical Plant and Petroleum Refinery Piping.
NBBI - ANS Establishes qualifications for boiler inspectors.
Certificate of competency - ANS Qualification required for chief power engineer.
Boiler heating surface - ANS Area in contact with water for heat transfer.
Kilowatt rating - ANS Power output measurement of a power plant.
B-51 code - ANS Regulates pressure vessel design and installation.
Pressure vessel inspection - ANS Required by law during fabrication in Canada and USA.
@2026/2027 ALLRIGHTS RESERVED.
,Dished seamless head - ANS Curved head design for pressure vessels.
Flanged-in manhole - ANS Access opening in pressure vessel heads.
SA-285 Grade C - ANS Material specification for pressure vessel construction.
Watertube boiler tube - ANS Tube type used in watertube boilers.
SA-192 - ANS Material specification for carbon steel tubes.
Safety valve discharge - ANS Steam volume safety valve must release per hour.
Superheater tube - ANS Tube used to heat steam beyond saturation.
SA-210 A-1 - ANS Material specification for seamless pipe.
Seamless material - ANS Material without welds, enhancing strength.
Full-hemispherical head - ANS Completely rounded head design for pressure vessels.
Orifice viscosity measurement - ANS Time for fluid to pass through an orifice.
Biomass fuels - ANS Fuels derived from living or recently living organisms.
@2026/2027 ALLRIGHTS RESERVED.
,Calorific value formula - ANS Calculates energy content of fuels.
Heating value of dry wood bark - ANS Energy content is approximately 20,000 kJ/kg.
Viscosity of fuel oil - ANS Decreases with temperature, stabilizes above 120°C.
Thickness calculation - ANS Determining material thickness for pressure vessel safety.
Steam temperature limit - ANS Maximum steam temperature for safe operation.
Weld reinforcement - ANS Extra material added to strengthen weld joints.
Manufacturer's tolerance - ANS Allowed variation in dimensions during fabrication.
Viscosity - ANS Decreases as temperature increases, constant above 120°C.
NOx Removal - ANS Non-catalytic process using ammonia in flue gas.
Heating Value - ANS Varies according to natural gas constituents.
Natural Gas Advantage - ANS Clean burning, produces no ash deposits.
Calorific Value Formula - ANS Calorific value = 33.7C + 144(H - O2/8) + 9.3S.
Calorific Value Result - ANS Calculated value is 28.05 MJ/kg.
@2026/2027 ALLRIGHTS RESERVED.
, Maximum Allowable Pressure - ANS 5.225 MPa for 25 mm thick SA-299 drum.
Drum Specifications - ANS Inside diameter 988 mm, joint efficiency 100%.
Dished Seamless Head Thickness - ANS Calculated for 1200 mm diameter boiler shell.
Head Material - ANS SA-285 Grade C used for dished head.
Maximum Pressure for Head - ANS 1930 kPa with steam temperature up to 260°C.
Boiler registration - ANS Design must be registered in jurisdiction.
Power piping materials - ANS Commonly includes materials 2, 3, 5.
R stamp - ANS National board stamp for repairs and alterations.
Nameplate - ANS Metal plate with stamped data information.
Change in pipe length factors - ANS Consider factors 1, 2, 3, 4.
Carbon steel temperature limit - ANS Suitable for temperatures up to 427°C.
Mechanical refrigeration standard - ANS Regulated by CSA-B52 standard.
@2026/2027 ALLRIGHTS RESERVED.
ANSWERS (VERIFIED AND UPDATED)
Operating pressure - ANS Pressure at which a system operates, measured in kPa.
B-51 code - ANS Regulates safety standards for boilers and components.
B31.3 - ANS Code for Chemical Plant and Petroleum Refinery Piping.
NBBI - ANS Establishes qualifications for boiler inspectors.
Certificate of competency - ANS Qualification required for chief power engineer.
Boiler heating surface - ANS Area in contact with water for heat transfer.
Kilowatt rating - ANS Power output measurement of a power plant.
B-51 code - ANS Regulates pressure vessel design and installation.
Pressure vessel inspection - ANS Required by law during fabrication in Canada and USA.
@2026/2027 ALLRIGHTS RESERVED.
,Dished seamless head - ANS Curved head design for pressure vessels.
Flanged-in manhole - ANS Access opening in pressure vessel heads.
SA-285 Grade C - ANS Material specification for pressure vessel construction.
Watertube boiler tube - ANS Tube type used in watertube boilers.
SA-192 - ANS Material specification for carbon steel tubes.
Safety valve discharge - ANS Steam volume safety valve must release per hour.
Superheater tube - ANS Tube used to heat steam beyond saturation.
SA-210 A-1 - ANS Material specification for seamless pipe.
Seamless material - ANS Material without welds, enhancing strength.
Full-hemispherical head - ANS Completely rounded head design for pressure vessels.
Orifice viscosity measurement - ANS Time for fluid to pass through an orifice.
Biomass fuels - ANS Fuels derived from living or recently living organisms.
@2026/2027 ALLRIGHTS RESERVED.
,Calorific value formula - ANS Calculates energy content of fuels.
Heating value of dry wood bark - ANS Energy content is approximately 20,000 kJ/kg.
Viscosity of fuel oil - ANS Decreases with temperature, stabilizes above 120°C.
Thickness calculation - ANS Determining material thickness for pressure vessel safety.
Steam temperature limit - ANS Maximum steam temperature for safe operation.
Weld reinforcement - ANS Extra material added to strengthen weld joints.
Manufacturer's tolerance - ANS Allowed variation in dimensions during fabrication.
Viscosity - ANS Decreases as temperature increases, constant above 120°C.
NOx Removal - ANS Non-catalytic process using ammonia in flue gas.
Heating Value - ANS Varies according to natural gas constituents.
Natural Gas Advantage - ANS Clean burning, produces no ash deposits.
Calorific Value Formula - ANS Calorific value = 33.7C + 144(H - O2/8) + 9.3S.
Calorific Value Result - ANS Calculated value is 28.05 MJ/kg.
@2026/2027 ALLRIGHTS RESERVED.
, Maximum Allowable Pressure - ANS 5.225 MPa for 25 mm thick SA-299 drum.
Drum Specifications - ANS Inside diameter 988 mm, joint efficiency 100%.
Dished Seamless Head Thickness - ANS Calculated for 1200 mm diameter boiler shell.
Head Material - ANS SA-285 Grade C used for dished head.
Maximum Pressure for Head - ANS 1930 kPa with steam temperature up to 260°C.
Boiler registration - ANS Design must be registered in jurisdiction.
Power piping materials - ANS Commonly includes materials 2, 3, 5.
R stamp - ANS National board stamp for repairs and alterations.
Nameplate - ANS Metal plate with stamped data information.
Change in pipe length factors - ANS Consider factors 1, 2, 3, 4.
Carbon steel temperature limit - ANS Suitable for temperatures up to 427°C.
Mechanical refrigeration standard - ANS Regulated by CSA-B52 standard.
@2026/2027 ALLRIGHTS RESERVED.
