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