Advanced Operations 2A3
What agency regulates boiler ratings in Alberta?
a. Alberta Energy Regulator
b. Alberta Boiler Safety Association (ABSA)
c. Energy Resources Conservation Board
d. Canadian Standards Association - answer b
The term boiler refers to
a. all areas, ducting, fans, fuel delivery system, and stack.
b. the area where change of state from water to steam occurs - answer b
What would be the surface area of a boiler generating 460 MW?
a. 460 000 square meters
b. 4600 square meters
c. 46 000 square meters
d. none of the above - answer c
One square meter of surface area equals ____ kW?
a. 10 kW
b. 1.0 kW
c. 100 W
d. none of the above - answer a
The rating of an electric boiler is equal to:
a. steam output in kg/hour
b. surface area
c. maximum kW rating of heating element
d. steam outlet pipe area times pressure - answer c
Alternatively, boiler output may be calculated as:
a. 36 kJ/hr = 10 kW
b. 360 kJ/hr = 10 kW
c. 3.6 MJ/hr = 10 kW
d. 36 MJ/hr = 10 kW - answer d
Manufacturers generally rate boiler output in two ways. They are:
a. heating surface area and/or fuel input
b. heating surface area and/or steam output kg/hr
c. steam output kg/hr and/or fuel input
, d. fuel input and/or steam output kg/hr - answer b
Boilers rated in kg/hr may not account for:
a. feedwater temperature
b. superheater outlet temperature and pressure
c. reheater mass flow temperature and pressure
d. all of the above - answer d
With same output, oil or gas fired furnaces are smaller than any solid fuel furnace.
Why?
a. rapid burnout of fuel means no tall furnace
b. no ash to speak of requiring extra furnace volume
c. both a and b
d. none of the above - answer c
Furnace water walls surround the furnace to capture radiant heat. They must be:
a. able to expand freely while remaining gas tight
b. able to fail structurally in the event of an explosion
c. free standing without support
d. none of the above - answer a
What are the types of water wall?
a. membrane wall/tangent tube wall
b. pin stud tube wall
c. flat stud tube wall
d. all of the above - answer d
A membrane tube wall is:
a. used for radiant furnace enclosure
b. water cooled and gas tight
c. inherently high strength due to method of construction
d. all of the above - answer d
Implosions may be caused by:
a. improper operation of dampers on units with induced draft
b. rapid furnace pressure drop due to loss of fuel supply
c. both a and b
d. none of the above - answer c
Pin stud tube walls:
a. are never used in modern boilers
b. protect furnace tubes from corrosion and erosion
c. increase rate of heat transfer
d. lower combustion temperature in furnace - answer b
Steam superheater design considerations include:
What agency regulates boiler ratings in Alberta?
a. Alberta Energy Regulator
b. Alberta Boiler Safety Association (ABSA)
c. Energy Resources Conservation Board
d. Canadian Standards Association - answer b
The term boiler refers to
a. all areas, ducting, fans, fuel delivery system, and stack.
b. the area where change of state from water to steam occurs - answer b
What would be the surface area of a boiler generating 460 MW?
a. 460 000 square meters
b. 4600 square meters
c. 46 000 square meters
d. none of the above - answer c
One square meter of surface area equals ____ kW?
a. 10 kW
b. 1.0 kW
c. 100 W
d. none of the above - answer a
The rating of an electric boiler is equal to:
a. steam output in kg/hour
b. surface area
c. maximum kW rating of heating element
d. steam outlet pipe area times pressure - answer c
Alternatively, boiler output may be calculated as:
a. 36 kJ/hr = 10 kW
b. 360 kJ/hr = 10 kW
c. 3.6 MJ/hr = 10 kW
d. 36 MJ/hr = 10 kW - answer d
Manufacturers generally rate boiler output in two ways. They are:
a. heating surface area and/or fuel input
b. heating surface area and/or steam output kg/hr
c. steam output kg/hr and/or fuel input
, d. fuel input and/or steam output kg/hr - answer b
Boilers rated in kg/hr may not account for:
a. feedwater temperature
b. superheater outlet temperature and pressure
c. reheater mass flow temperature and pressure
d. all of the above - answer d
With same output, oil or gas fired furnaces are smaller than any solid fuel furnace.
Why?
a. rapid burnout of fuel means no tall furnace
b. no ash to speak of requiring extra furnace volume
c. both a and b
d. none of the above - answer c
Furnace water walls surround the furnace to capture radiant heat. They must be:
a. able to expand freely while remaining gas tight
b. able to fail structurally in the event of an explosion
c. free standing without support
d. none of the above - answer a
What are the types of water wall?
a. membrane wall/tangent tube wall
b. pin stud tube wall
c. flat stud tube wall
d. all of the above - answer d
A membrane tube wall is:
a. used for radiant furnace enclosure
b. water cooled and gas tight
c. inherently high strength due to method of construction
d. all of the above - answer d
Implosions may be caused by:
a. improper operation of dampers on units with induced draft
b. rapid furnace pressure drop due to loss of fuel supply
c. both a and b
d. none of the above - answer c
Pin stud tube walls:
a. are never used in modern boilers
b. protect furnace tubes from corrosion and erosion
c. increase rate of heat transfer
d. lower combustion temperature in furnace - answer b
Steam superheater design considerations include:
