POWER ENGINEERING 2A3 TEST STUDY GUIDE
2026 COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED PASS
<LATEST VERSION>
1. One boiler horsepower is equal to how many kW - ANSWER ✔ 9.809kW
2. This is still the common measure of capacity for small boilers, where large
boiler capacity is given in the number of kg of steam per hour.
3. What are the definitions of boiler, steam generator and steam generating
unit? - ANSWER ✔ Boiler - strictly speaking are the elements in which the
change of state from water to steam takes place.
4. Steam generator - embraces the many combinations of heating surfaces, such
as water walls, superheaters, reheaters, economizers, and air heaters.
5. Steam generating units - consists of a steam generator and its associated
equipment, including fuel burning, ash removal, and draft systems.
6. What are the three general methods of calculating the output rating of a
boiler? - ANSWER ✔ 1) One square meter of heating surface equals 10 kW.
Where a computation is to be made of a curved surface, the surface having
the greater radius shall be taken.
,7. 2)Where electric power is used as the heat source, the boiler rating shall be
the maximum kilowatt rating of the heating element. The actual output will
be somewhat less.
8. 3) Where neither of the above determinations are applicable, an hourly
output of 36 MJ is equivalent to 10 kW. This is the calculation employed in
determining the heat balance of a steam plant.
9. Steam generators are often rated in terms of - ANSWER ✔ maximum
continuous steam output in kg/hr at design temperature and pressure. The
kg/hr rating at the stop valves must include reheater sections of steam
generating units.
10.Steam generators supplying steam to turbo-alternators are often rated in -
ANSWER ✔ megawatts, because the energy supplied to the turbines is
converted to electrical power. This is not an accurate measure of the energy
output because the turbine and generator efficiencies are not considered.
11.What are the distinct steps that clarification equipment have to
accommodate? - ANSWER ✔ - Rapid mix for coagulation
- Moderate mix for flocculation
- Floc and water separation
- Collection and disposal of sludge
12.What are the three most common types of filters? - ANSWER ✔ Gravity
filters, pressure filters and cartridge filters
13.What are four different types of filtration? - ANSWER ✔ - Occlusion
(Surface filtration)- removal due to an impurity's particle size. Particles are
occluded, or held back, due to their inability to pass through the pores of a
barrier.
, - Adsorption - removal due to the impurity's adherence to the media
- Reduction - removal of free residual chlorine through conversion to
chloride ions in the presence of activated carbon media
- Oxidation - removal of iron and magnesium using oxidation,
precipitation, and filtration in the presence of greensand (zeolite)
media
14.Potable water treatment - ANSWER ✔ Preparation of water to drinking
water standards for human consumption
15.Impurities - ANSWER ✔ Substances present in groundwater and surface
water sources that determine the type of treatment needed
16.Softening - ANSWER ✔ Process to reduce dissolved minerals such as iron,
calcium, and magnesium in well waters
17.Chlorination - ANSWER ✔ Disinfection process using chlorine, common
for both well and surface waters
18.Filtration - ANSWER ✔ Process to remove suspended solids from waters of
lakes and rivers
19.Aeration - ANSWER ✔ Process used when source water is high in dissolved
gases causing unwanted tastes and odors
, 20.Coagulation chemicals - ANSWER ✔ Chemicals used in a fast mixing
section to aid in the removal of solids upstream of filters
21.Sedimentation - ANSWER ✔ Process adding steps for slow mixing to aid in
the removal of solids upstream of filters
22.Zeolite softener - ANSWER ✔ Used to reduce hardness before chlorination,
allowing a portion of water to bypass for clarity
23.Total coliform bacteria - ANSWER ✔ Group commonly found in raw water
supplies, with Canadian regulatory standards for their presence
24.E-coli - ANSWER ✔ A form of fecal coliform, direct testing required if
coliform bacteria are found
25.Sterilization - ANSWER ✔ Complete removal or destruction of all life
forms from water, with potential side effects
26.Disinfection - ANSWER ✔ Removal or destruction of all pathogenic
organisms in water, with a focus on fecal coliform bacteria
27.Chlorine gas - ANSWER ✔ Used for chlorination, but is a respiratory
irritant and toxic
28.Sodium hypochlorite - ANSWER ✔ Aqueous or liquid form of chlorination,
more stable and less hazardous than chlorine gas
2026 COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED PASS
<LATEST VERSION>
1. One boiler horsepower is equal to how many kW - ANSWER ✔ 9.809kW
2. This is still the common measure of capacity for small boilers, where large
boiler capacity is given in the number of kg of steam per hour.
3. What are the definitions of boiler, steam generator and steam generating
unit? - ANSWER ✔ Boiler - strictly speaking are the elements in which the
change of state from water to steam takes place.
4. Steam generator - embraces the many combinations of heating surfaces, such
as water walls, superheaters, reheaters, economizers, and air heaters.
5. Steam generating units - consists of a steam generator and its associated
equipment, including fuel burning, ash removal, and draft systems.
6. What are the three general methods of calculating the output rating of a
boiler? - ANSWER ✔ 1) One square meter of heating surface equals 10 kW.
Where a computation is to be made of a curved surface, the surface having
the greater radius shall be taken.
,7. 2)Where electric power is used as the heat source, the boiler rating shall be
the maximum kilowatt rating of the heating element. The actual output will
be somewhat less.
8. 3) Where neither of the above determinations are applicable, an hourly
output of 36 MJ is equivalent to 10 kW. This is the calculation employed in
determining the heat balance of a steam plant.
9. Steam generators are often rated in terms of - ANSWER ✔ maximum
continuous steam output in kg/hr at design temperature and pressure. The
kg/hr rating at the stop valves must include reheater sections of steam
generating units.
10.Steam generators supplying steam to turbo-alternators are often rated in -
ANSWER ✔ megawatts, because the energy supplied to the turbines is
converted to electrical power. This is not an accurate measure of the energy
output because the turbine and generator efficiencies are not considered.
11.What are the distinct steps that clarification equipment have to
accommodate? - ANSWER ✔ - Rapid mix for coagulation
- Moderate mix for flocculation
- Floc and water separation
- Collection and disposal of sludge
12.What are the three most common types of filters? - ANSWER ✔ Gravity
filters, pressure filters and cartridge filters
13.What are four different types of filtration? - ANSWER ✔ - Occlusion
(Surface filtration)- removal due to an impurity's particle size. Particles are
occluded, or held back, due to their inability to pass through the pores of a
barrier.
, - Adsorption - removal due to the impurity's adherence to the media
- Reduction - removal of free residual chlorine through conversion to
chloride ions in the presence of activated carbon media
- Oxidation - removal of iron and magnesium using oxidation,
precipitation, and filtration in the presence of greensand (zeolite)
media
14.Potable water treatment - ANSWER ✔ Preparation of water to drinking
water standards for human consumption
15.Impurities - ANSWER ✔ Substances present in groundwater and surface
water sources that determine the type of treatment needed
16.Softening - ANSWER ✔ Process to reduce dissolved minerals such as iron,
calcium, and magnesium in well waters
17.Chlorination - ANSWER ✔ Disinfection process using chlorine, common
for both well and surface waters
18.Filtration - ANSWER ✔ Process to remove suspended solids from waters of
lakes and rivers
19.Aeration - ANSWER ✔ Process used when source water is high in dissolved
gases causing unwanted tastes and odors
, 20.Coagulation chemicals - ANSWER ✔ Chemicals used in a fast mixing
section to aid in the removal of solids upstream of filters
21.Sedimentation - ANSWER ✔ Process adding steps for slow mixing to aid in
the removal of solids upstream of filters
22.Zeolite softener - ANSWER ✔ Used to reduce hardness before chlorination,
allowing a portion of water to bypass for clarity
23.Total coliform bacteria - ANSWER ✔ Group commonly found in raw water
supplies, with Canadian regulatory standards for their presence
24.E-coli - ANSWER ✔ A form of fecal coliform, direct testing required if
coliform bacteria are found
25.Sterilization - ANSWER ✔ Complete removal or destruction of all life
forms from water, with potential side effects
26.Disinfection - ANSWER ✔ Removal or destruction of all pathogenic
organisms in water, with a focus on fecal coliform bacteria
27.Chlorine gas - ANSWER ✔ Used for chlorination, but is a respiratory
irritant and toxic
28.Sodium hypochlorite - ANSWER ✔ Aqueous or liquid form of chlorination,
more stable and less hazardous than chlorine gas
