2 A3 Power Engineering Questions
with Correct Answers
1 boiler HP equals how many kilowatts? - CORRECT ANSWER✔️✔️-9.809 kW
Boiler Definition? - CORRECT ANSWER✔️✔️-The exact part of the unit where waters changes
from liquid to vapour state
Steam Generator Definition? - CORRECT ANSWER✔️✔️-Embraces the many combinations of
heating surfaces such as waterwalls, superheaters, reheaters, economizers and air heaters.
Steam Generating Unit definition? - CORRECT ANSWER✔️✔️-Consists of a steam generator
and all of its associated equipment including: fuel burning, ash removal and draft systems.
2 ways of attaching boiler tubes to drums/headers? - CORRECT ANSWER✔️✔️-- Welding into
place
- Expanding into place using an "expander" tool
What is Top Dryness? - CORRECT ANSWER✔️✔️-- Top dryness is the percentage of steam by
mass in the steam water mixture at the top of a riser tube where heating ceases
- Usually runs from about 5%-20%
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,- A film of steam is created at the top of riser tubes when top dryness becomes excessive. Adequate
cooling of tubes is not achieved
What is the Boiler Casing? - CORRECT ANSWER✔️✔️-- The airtight covering forming the outer
layer of the boiler constructed of steel plate
- Areas include: outer skin covering water walls, windbox and burner ducting, ducting enclosing the
economizer, and air heater
- Expansion joints must be joined between the boiler pressure parts and casing because of
temperature differential. (varying expansion rates)
The boiler casing is part of the boiler setting. True or False? - CORRECT ANSWER✔️✔️-True
List the sections (in order) of a Once through Boiler. - CORRECT ANSWER✔️✔️-Feed water
inlet, Economizer, Radiant Evaporator section, Final Evaporator Section, Convection Superheater
Section, Radiant Superheater Section, Steam outlet.
What controls the flow to the individual generating tubes in a controlled circulation boiler? -
CORRECT ANSWER✔️✔️-Orifices in an inlet header equally distribute feed water to
radiant/convection sections in a controlled circulation boiler.
Purpose of screen tubes? - CORRECT ANSWER✔️✔️-- Receive radiant heat from the furnace as
well as convective heat from flue gas passing through
- Act to protect the inlet tubes of the superheater from excessive radiant heat
- Also slightly reduce the temperature of the gases exiting the furnace
- Screen tubes are completely filled with water and can extend from the boiler generating bank
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
,Boiler Division Walls? - CORRECT ANSWER✔️✔️-- Usually made of airtight all-welded
membrane construction
- Separate zones of the boiler, for example the convection and radiant zones
What is Steam Flooding? - CORRECT ANSWER✔️✔️-- A technique used in the oil and gas
industry to recover high viscosity crude oils or bitumen
- At room temperature bitumen is like molasses
- Steam flooding allows the maximum amount of heat to enter the well with the minimum amount
of injected fluid
- Target temperature is 178 degrees celsius
Oil sands and SAGD's? - CORRECT ANSWER✔️✔️-- Oil Sands: Naturally occurring mixtures of
bitumen, water, sand and clay that are found in 3 areas of Alberta: Athabasca, Peace River and Cold
Lake
- Typical oil sand samples hold around 12% bitumen by weight
- 2 Horizontal wells must exist to employ SAGD means of recovery.
Steam Flood Boilers? - CORRECT ANSWER✔️✔️-- Forced circulation steam generators with a
single pass or once through coil
- Steam quality is usually 75%-80% Steam/Water quality
- This wet steam condition keeps all salts entrained in the feed water and deposits will not collect on
evaporative tube sections
- No steam drum
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
, - Outputs range from 5 million kj/hr to 125 million kj/hr.
Water Sterilization? - CORRECT ANSWER✔️✔️-- Complete removal of all life forms from the
water
Water Disinfection? - CORRECT ANSWER✔️✔️-- Most common method of water purification
for potable water use
- Removes all pathogenic (disease-causing) organisms in the water
Coliform Bacteria? - CORRECT ANSWER✔️✔️-- Some are harmless or beneficial but some are
very dangerous such as fecal coliform bacteria which cause intestinal illnesses in humans
Canadian Regulatory Standards for Coliform Bacteria? - CORRECT ANSWER✔️✔️-- No sample
can contain more than 10 coliform per 100 ml
- No consecutive sample from the same site can contain any coliform
- No more than 10% of samples in a minimum group of 10 samples should contain any coliform in
a calendar month
Any traces of E. coli coliform are unacceptable. True or False? - CORRECT ANSWER✔️✔️-True
Common free chlorine residual for potable water? - CORRECT ANSWER✔️✔️-0.3 mg/l residual
Chlorine Demand? - CORRECT ANSWER✔️✔️-- The point at which an reducing agents are
eliminated by a certain amount of chlorine addition
- The point where all chloro-organic compounds are eliminated
- The point where all chloramines are eliminated by oxidation
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 4
with Correct Answers
1 boiler HP equals how many kilowatts? - CORRECT ANSWER✔️✔️-9.809 kW
Boiler Definition? - CORRECT ANSWER✔️✔️-The exact part of the unit where waters changes
from liquid to vapour state
Steam Generator Definition? - CORRECT ANSWER✔️✔️-Embraces the many combinations of
heating surfaces such as waterwalls, superheaters, reheaters, economizers and air heaters.
Steam Generating Unit definition? - CORRECT ANSWER✔️✔️-Consists of a steam generator
and all of its associated equipment including: fuel burning, ash removal and draft systems.
2 ways of attaching boiler tubes to drums/headers? - CORRECT ANSWER✔️✔️-- Welding into
place
- Expanding into place using an "expander" tool
What is Top Dryness? - CORRECT ANSWER✔️✔️-- Top dryness is the percentage of steam by
mass in the steam water mixture at the top of a riser tube where heating ceases
- Usually runs from about 5%-20%
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,- A film of steam is created at the top of riser tubes when top dryness becomes excessive. Adequate
cooling of tubes is not achieved
What is the Boiler Casing? - CORRECT ANSWER✔️✔️-- The airtight covering forming the outer
layer of the boiler constructed of steel plate
- Areas include: outer skin covering water walls, windbox and burner ducting, ducting enclosing the
economizer, and air heater
- Expansion joints must be joined between the boiler pressure parts and casing because of
temperature differential. (varying expansion rates)
The boiler casing is part of the boiler setting. True or False? - CORRECT ANSWER✔️✔️-True
List the sections (in order) of a Once through Boiler. - CORRECT ANSWER✔️✔️-Feed water
inlet, Economizer, Radiant Evaporator section, Final Evaporator Section, Convection Superheater
Section, Radiant Superheater Section, Steam outlet.
What controls the flow to the individual generating tubes in a controlled circulation boiler? -
CORRECT ANSWER✔️✔️-Orifices in an inlet header equally distribute feed water to
radiant/convection sections in a controlled circulation boiler.
Purpose of screen tubes? - CORRECT ANSWER✔️✔️-- Receive radiant heat from the furnace as
well as convective heat from flue gas passing through
- Act to protect the inlet tubes of the superheater from excessive radiant heat
- Also slightly reduce the temperature of the gases exiting the furnace
- Screen tubes are completely filled with water and can extend from the boiler generating bank
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
,Boiler Division Walls? - CORRECT ANSWER✔️✔️-- Usually made of airtight all-welded
membrane construction
- Separate zones of the boiler, for example the convection and radiant zones
What is Steam Flooding? - CORRECT ANSWER✔️✔️-- A technique used in the oil and gas
industry to recover high viscosity crude oils or bitumen
- At room temperature bitumen is like molasses
- Steam flooding allows the maximum amount of heat to enter the well with the minimum amount
of injected fluid
- Target temperature is 178 degrees celsius
Oil sands and SAGD's? - CORRECT ANSWER✔️✔️-- Oil Sands: Naturally occurring mixtures of
bitumen, water, sand and clay that are found in 3 areas of Alberta: Athabasca, Peace River and Cold
Lake
- Typical oil sand samples hold around 12% bitumen by weight
- 2 Horizontal wells must exist to employ SAGD means of recovery.
Steam Flood Boilers? - CORRECT ANSWER✔️✔️-- Forced circulation steam generators with a
single pass or once through coil
- Steam quality is usually 75%-80% Steam/Water quality
- This wet steam condition keeps all salts entrained in the feed water and deposits will not collect on
evaporative tube sections
- No steam drum
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
, - Outputs range from 5 million kj/hr to 125 million kj/hr.
Water Sterilization? - CORRECT ANSWER✔️✔️-- Complete removal of all life forms from the
water
Water Disinfection? - CORRECT ANSWER✔️✔️-- Most common method of water purification
for potable water use
- Removes all pathogenic (disease-causing) organisms in the water
Coliform Bacteria? - CORRECT ANSWER✔️✔️-- Some are harmless or beneficial but some are
very dangerous such as fecal coliform bacteria which cause intestinal illnesses in humans
Canadian Regulatory Standards for Coliform Bacteria? - CORRECT ANSWER✔️✔️-- No sample
can contain more than 10 coliform per 100 ml
- No consecutive sample from the same site can contain any coliform
- No more than 10% of samples in a minimum group of 10 samples should contain any coliform in
a calendar month
Any traces of E. coli coliform are unacceptable. True or False? - CORRECT ANSWER✔️✔️-True
Common free chlorine residual for potable water? - CORRECT ANSWER✔️✔️-0.3 mg/l residual
Chlorine Demand? - CORRECT ANSWER✔️✔️-- The point at which an reducing agents are
eliminated by a certain amount of chlorine addition
- The point where all chloro-organic compounds are eliminated
- The point where all chloramines are eliminated by oxidation
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 4
