Black seal high pressure Exam Questions and
Answers
What are the four main systems of a steam boiler? - -Fuel, Draft, Feedwater, and Steam
-What is the first thing an operator should do when entering a steam boiler room? - -Check
the water level of the boiler(s)
-Describe the design of a firetube boiler - -Fire inside the tubes, surrounded by water
-What is the primary purpose of Low Water Fuel Cut-Off (LWCO)? - -Shut off the fuel
supply to the boiler in the event of low water
-How often should the low water cut-off be tested? - -Once per day by law. Once per shift is
best practice.
-What is an alternative way to verify water level without using the gauge glass? - -Using
the Try Cocks
-What is sensible heat? - -A change in temperature without a change in matter
-What unit is used in our industry to measure heat? - -BTU's
-Describe thermal expansion - -The tendency of matter to change in volume in response to
a change in temperature
-What is the most important rule of safe boiler operation? - -Maintain water level
-What type of heat is a larger exchange of BTU's and results in a change in matter without
changing temperature? - -Latent Heat
-Which temperature scale is used by the majority of the world? - -Celcius
-How often, by law, must a boiler be inspected? - -Annually
-A change in temperature is an example of: - -Sensible heat
-How many BTU's does it take to change one pound of water into one pound of steam? - -
970.3
-What type of heat is a larger exchange of BTU's? - -Latent Heat
-What is the most common fuel oil used in boilers? - -#2
, -What are the 4 fundamentals of combustion? - -Mixture, Atomization, Time, Temperature
-What PH level is ideal in boiler operation? - -10-11.5
-Visible black smoke coming from the boiler stack would most likely be an indication of: - -
A lack of air in the combustion process
-Which type of valve allows the flow of feedwater in one direction only? - -Check Valve
-Which two minerals contribute to scale? - -Calcium and Magnesium
-What device is used to measure draft? - -Manometer
-What is the purpose of a safety valve? - -Prevent overpressure of the boiler
-What type of draft fan would be located in between the chimney and the boiler furnace? -
-Induced Draft Fan
-What valve is allowed between the safety valve and the boiler? - -No Valve Ever
-How is a boiler's steam capacity measured? - -lbs/hr
-Which type of valve would be used to modulate (or regulate) flow? - -Globe Valve
-What are the four elements of process control? - -Process; Evaluation; Measurement;
Control
-How much heat is required to change 2,500 lb of water to steam at 212 degrees? - -
2,425,750 Btu
-In a fire-tube boiler, how are the tubes usually attached to the tube sheet? - -by rolling the
tubes and beading the ends
-Air receivers must conform to what ASME Code - -Section VIII
-What is the term that defines the ratio of the total heat supplied by the fuel to the total
heat absorbed by the boiler water? - -thermal efficiency
-The maintenance of automatic direct fired boilers is covered under what document? - -
ASME CSD-1
-Where would you find downcomer tubes? - -in water-tube boilers
-The heat that is added to convert a liquid to a vapor at a constant temperature is called. - -
latent heat of evaporation
Answers
What are the four main systems of a steam boiler? - -Fuel, Draft, Feedwater, and Steam
-What is the first thing an operator should do when entering a steam boiler room? - -Check
the water level of the boiler(s)
-Describe the design of a firetube boiler - -Fire inside the tubes, surrounded by water
-What is the primary purpose of Low Water Fuel Cut-Off (LWCO)? - -Shut off the fuel
supply to the boiler in the event of low water
-How often should the low water cut-off be tested? - -Once per day by law. Once per shift is
best practice.
-What is an alternative way to verify water level without using the gauge glass? - -Using
the Try Cocks
-What is sensible heat? - -A change in temperature without a change in matter
-What unit is used in our industry to measure heat? - -BTU's
-Describe thermal expansion - -The tendency of matter to change in volume in response to
a change in temperature
-What is the most important rule of safe boiler operation? - -Maintain water level
-What type of heat is a larger exchange of BTU's and results in a change in matter without
changing temperature? - -Latent Heat
-Which temperature scale is used by the majority of the world? - -Celcius
-How often, by law, must a boiler be inspected? - -Annually
-A change in temperature is an example of: - -Sensible heat
-How many BTU's does it take to change one pound of water into one pound of steam? - -
970.3
-What type of heat is a larger exchange of BTU's? - -Latent Heat
-What is the most common fuel oil used in boilers? - -#2
, -What are the 4 fundamentals of combustion? - -Mixture, Atomization, Time, Temperature
-What PH level is ideal in boiler operation? - -10-11.5
-Visible black smoke coming from the boiler stack would most likely be an indication of: - -
A lack of air in the combustion process
-Which type of valve allows the flow of feedwater in one direction only? - -Check Valve
-Which two minerals contribute to scale? - -Calcium and Magnesium
-What device is used to measure draft? - -Manometer
-What is the purpose of a safety valve? - -Prevent overpressure of the boiler
-What type of draft fan would be located in between the chimney and the boiler furnace? -
-Induced Draft Fan
-What valve is allowed between the safety valve and the boiler? - -No Valve Ever
-How is a boiler's steam capacity measured? - -lbs/hr
-Which type of valve would be used to modulate (or regulate) flow? - -Globe Valve
-What are the four elements of process control? - -Process; Evaluation; Measurement;
Control
-How much heat is required to change 2,500 lb of water to steam at 212 degrees? - -
2,425,750 Btu
-In a fire-tube boiler, how are the tubes usually attached to the tube sheet? - -by rolling the
tubes and beading the ends
-Air receivers must conform to what ASME Code - -Section VIII
-What is the term that defines the ratio of the total heat supplied by the fuel to the total
heat absorbed by the boiler water? - -thermal efficiency
-The maintenance of automatic direct fired boilers is covered under what document? - -
ASME CSD-1
-Where would you find downcomer tubes? - -in water-tube boilers
-The heat that is added to convert a liquid to a vapor at a constant temperature is called. - -
latent heat of evaporation
