BLACK SEAL TEST STUDY GUIDE 230
QUESTIONS ACTUAL PAPER 2026
COMPLETE QUESTIONS AND ANSWERS
GRADED A+
⩥ How many pounds of steam per hour in one boiler horsepower?
Answer: 34.5 lbs./hr
⩥ T/F: A welded repair is allowed on the pressure retaining area of a
boiler on pressure vessel. Answer: True
⩥ What letter stamp represents on a low-pressure boiler? Answer: H
⩥ The on-off controls of a steam boiler are installed Answer: In a
vertical position
⩥ What is the minimum fine for not properly posting a license? Answer:
$500
⩥ What is the first thing you check when entering a boiler room?
Answer: The water level
,⩥ What is the maximum horsepower a low pressure licensed operator
can operate to? Answer: No limit
⩥ How often do you check the low water cut-off? Answer: Daily
⩥ Where is the make-up water in a hot water boiler? Answer: In the
return line
⩥ What is the maximum size blowdown line? Answer: 2 1/2 inches
⩥ T/F: A Chief Engineer is not needed in a low pressure plant. Answer:
True
⩥ When do you close a boiler vent? Answer: When the steam comes out
⩥ What protects sewer lines from high temperatures and pressures from
blowdowns? Answer: Blowdown tank
⩥ How much horsepower do you need to obtain a black seal (low or
high pressure) license? Answer: Over 100 horsepower
⩥ What happens when you have a closed oil vent? Answer: Oil Spill
, ⩥ Safety valves should be tested: Answer: Once a month
⩥ What is the most important fitting on a boiler? Answer: Safety Valve
⩥ Boiler water should have a pH of: Answer: 11
⩥ What happens if a steam trap continuously blows through? Answer:
Steam vents from the condensate tank
⩥ A rotary cup burner atomizes fuel: Answer: By means of a spinning
cup/high velocity air
⩥ Where does the fuel atomize? Answer: At the burner tip
⩥ Retubed or new boilers are cleaned with: Answer: Alkaline detergent
⩥ Vacuum gauges are calibrated in inches of: Answer: Mercurey below
⩥ What does oxygen cause? Answer: Pitting of boiler metal
⩥ Where is the jurisdiction (registration) # on a boiler? Answer: On the
front of the boiler.
QUESTIONS ACTUAL PAPER 2026
COMPLETE QUESTIONS AND ANSWERS
GRADED A+
⩥ How many pounds of steam per hour in one boiler horsepower?
Answer: 34.5 lbs./hr
⩥ T/F: A welded repair is allowed on the pressure retaining area of a
boiler on pressure vessel. Answer: True
⩥ What letter stamp represents on a low-pressure boiler? Answer: H
⩥ The on-off controls of a steam boiler are installed Answer: In a
vertical position
⩥ What is the minimum fine for not properly posting a license? Answer:
$500
⩥ What is the first thing you check when entering a boiler room?
Answer: The water level
,⩥ What is the maximum horsepower a low pressure licensed operator
can operate to? Answer: No limit
⩥ How often do you check the low water cut-off? Answer: Daily
⩥ Where is the make-up water in a hot water boiler? Answer: In the
return line
⩥ What is the maximum size blowdown line? Answer: 2 1/2 inches
⩥ T/F: A Chief Engineer is not needed in a low pressure plant. Answer:
True
⩥ When do you close a boiler vent? Answer: When the steam comes out
⩥ What protects sewer lines from high temperatures and pressures from
blowdowns? Answer: Blowdown tank
⩥ How much horsepower do you need to obtain a black seal (low or
high pressure) license? Answer: Over 100 horsepower
⩥ What happens when you have a closed oil vent? Answer: Oil Spill
, ⩥ Safety valves should be tested: Answer: Once a month
⩥ What is the most important fitting on a boiler? Answer: Safety Valve
⩥ Boiler water should have a pH of: Answer: 11
⩥ What happens if a steam trap continuously blows through? Answer:
Steam vents from the condensate tank
⩥ A rotary cup burner atomizes fuel: Answer: By means of a spinning
cup/high velocity air
⩥ Where does the fuel atomize? Answer: At the burner tip
⩥ Retubed or new boilers are cleaned with: Answer: Alkaline detergent
⩥ Vacuum gauges are calibrated in inches of: Answer: Mercurey below
⩥ What does oxygen cause? Answer: Pitting of boiler metal
⩥ Where is the jurisdiction (registration) # on a boiler? Answer: On the
front of the boiler.
