BLACK SEAL UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPLETE STUDY GUIDE
●● What is the first thing an operator should do when entering a steam
boiler room?
Answer: Check the water level of the boiler(s)
●● Describe the design of a firetube boiler
Answer: Fire inside the tubes, surrounded by water
●● What is the primary purpose of Low Water Fuel Cut-Off (LWCO)?
Answer: Shut off the fuel supply to the boiler in the event of low water
●● How often should the low water cut-off be tested?
Answer: 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?
Answer: Using the Try Cocks
●● What is sensible heat?
,Answer: A change in temperature without a change in matter
●● What unit is used in our industry to measure heat?
Answer: BTU's
●● Describe thermal expansion
Answer: 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?
Answer: Maintain water level
●● What type of heat is a larger exchange of BTU's and results in a
change in matter without changing temperature?
Answer: Latent Heat
●● Which temperature scale is used by the majority of the world?
Answer: Celcius
●● How often, by law, must a boiler be inspected?
Answer: Annually
●● A change in temperature is an example of:
, Answer: Sensible heat
●● How many BTU's does it take to change one pound of water into one
pound of steam?
Answer: 970.3
●● What type of heat is a larger exchange of BTU's?
Answer: Latent Heat
●● What is the most common fuel oil used in boilers?
Answer: #2
●● What are the 4 fundamentals of combustion?
Answer: Mixture, Atomization, Time, Temperature
●● What PH level is ideal in boiler operation?
Answer: 10-11.5
●● Visible black smoke coming from the boiler stack would most likely
be an indication of:
Answer: A lack of air in the combustion process
QUESTIONS AND CORRECT ANSWERS
COMPLETE STUDY GUIDE
●● What is the first thing an operator should do when entering a steam
boiler room?
Answer: Check the water level of the boiler(s)
●● Describe the design of a firetube boiler
Answer: Fire inside the tubes, surrounded by water
●● What is the primary purpose of Low Water Fuel Cut-Off (LWCO)?
Answer: Shut off the fuel supply to the boiler in the event of low water
●● How often should the low water cut-off be tested?
Answer: 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?
Answer: Using the Try Cocks
●● What is sensible heat?
,Answer: A change in temperature without a change in matter
●● What unit is used in our industry to measure heat?
Answer: BTU's
●● Describe thermal expansion
Answer: 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?
Answer: Maintain water level
●● What type of heat is a larger exchange of BTU's and results in a
change in matter without changing temperature?
Answer: Latent Heat
●● Which temperature scale is used by the majority of the world?
Answer: Celcius
●● How often, by law, must a boiler be inspected?
Answer: Annually
●● A change in temperature is an example of:
, Answer: Sensible heat
●● How many BTU's does it take to change one pound of water into one
pound of steam?
Answer: 970.3
●● What type of heat is a larger exchange of BTU's?
Answer: Latent Heat
●● What is the most common fuel oil used in boilers?
Answer: #2
●● What are the 4 fundamentals of combustion?
Answer: Mixture, Atomization, Time, Temperature
●● What PH level is ideal in boiler operation?
Answer: 10-11.5
●● Visible black smoke coming from the boiler stack would most likely
be an indication of:
Answer: A lack of air in the combustion process
