Power Engineering 2A3
2026/2027 Exam Questions and
Answers | Already Graded A+
One boiler horsepower is equal to how many kW - ANSWER
✔✔9.809kW
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.
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.
,Steam generator - embraces the many combinations of heating
surfaces, such as water walls, superheaters, reheaters, economizers,
and air heaters.
Steam generating units - consists of a steam generator and its
associated equipment, including fuel burning, ash removal, and draft
systems.
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.
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.
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.
,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.
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.
What are the standard conditions for comparing boilers/equivalent
evaporation? - ANSWER ✔✔The amount of heat necessary to
convert 1 kg of water at 100 ℃ into 1 kg of 100% dry steam at 101.325
kPa and 100 ℃
What is the factor of evaporation? - ANSWER ✔✔The ratio between
the heat taken per kg of steam under actual conditions and the heat
taken in evaporating 1 kg of dry steam at 100 ℃
What are the 5 fundamental requirements, or objectives, for boiler
design? - ANSWER ✔✔- Efficiency
- Reliability
COPYRIGHT©PROFFKERRYMARTIN 2026/2027. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, - Cost
- Serviceability
- Safety
When looking at boiler design, which components will be influenced due
to the type of fuel being used? - ANSWER ✔✔- The furnace size or
heating surface
- The placement of the heating surface
- The equipment needed to prepare and burn the fuel
- The size and type of heat recovery equipment
- The fuel gas treatment devices
What is the most common type of solid fuel that is burned? -
ANSWER ✔✔Pulverized coal
For the same output, which furnace must be the largest for gas, oil or
coal? - ANSWER ✔✔The coal furnaces must be larger, but the
velocities of the combustion gases must be slower. The combustion
process is slower, because the solid coal releases volatile matter which
is then oxidized.
2026/2027 Exam Questions and
Answers | Already Graded A+
One boiler horsepower is equal to how many kW - ANSWER
✔✔9.809kW
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.
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.
,Steam generator - embraces the many combinations of heating
surfaces, such as water walls, superheaters, reheaters, economizers,
and air heaters.
Steam generating units - consists of a steam generator and its
associated equipment, including fuel burning, ash removal, and draft
systems.
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.
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.
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.
,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.
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.
What are the standard conditions for comparing boilers/equivalent
evaporation? - ANSWER ✔✔The amount of heat necessary to
convert 1 kg of water at 100 ℃ into 1 kg of 100% dry steam at 101.325
kPa and 100 ℃
What is the factor of evaporation? - ANSWER ✔✔The ratio between
the heat taken per kg of steam under actual conditions and the heat
taken in evaporating 1 kg of dry steam at 100 ℃
What are the 5 fundamental requirements, or objectives, for boiler
design? - ANSWER ✔✔- Efficiency
- Reliability
COPYRIGHT©PROFFKERRYMARTIN 2026/2027. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, - Cost
- Serviceability
- Safety
When looking at boiler design, which components will be influenced due
to the type of fuel being used? - ANSWER ✔✔- The furnace size or
heating surface
- The placement of the heating surface
- The equipment needed to prepare and burn the fuel
- The size and type of heat recovery equipment
- The fuel gas treatment devices
What is the most common type of solid fuel that is burned? -
ANSWER ✔✔Pulverized coal
For the same output, which furnace must be the largest for gas, oil or
coal? - ANSWER ✔✔The coal furnaces must be larger, but the
velocities of the combustion gases must be slower. The combustion
process is slower, because the solid coal releases volatile matter which
is then oxidized.
