BLACK SEAL TEST STUDY GUIDE 230
QUESTIONS EXAMINATION TEST 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Carryover can lead to: Answer: Water Hammer
⩥ Water column & gauge glass should be blown down: Answer: Daily
⩥ If water leaves the boiler at 170•, what temperature does it return at?
Answer: 150•
⩥ What is the most common cause of cast iron boiler failure? Answer:
Cracking
⩥ The positioning control cannot function without: Answer: Air
⩥ What is the most common of problems in a hot water system?
Answer: Air
⩥ What fire tube is most efficient? Answer: 4 Pass
,⩥ Where are the combustion gases on a serpentine boiler? Answer:
Below the tubes
⩥ What is the purpose of a check valve? Answer: To Prevent reverse
flow & Allow flow in one direction
⩥ A solenoid valve: Answer: Is an automatic gas shutoff valve
⩥ The most common type of pressure control device used is the:
Answer: Mercury Tube
⩥ A steam gauge is calibrated in: Answer: Lbs/Sq. Inch
⩥ Heavy soot on the fireside of tubes: Answer: Should be removed for
better heat transfer
⩥ What code is a heating boiler built to: Answer: ASME Section IV(4)
⩥ When connecting a Bourdon tube steam gauge to a boiler, a pigtail is
used to: Answer: Protect Bourdon tube from steam
⩥ External feed water treatment can be a _____ process. Answer: Cold
lime soda, hot lime soda, or ion exchange
, ⩥ Natural water may contain: Answer: Solids and other pollutions
⩥ What is the min. temp of a hot water boiler operation to prevent
condensation? Answer: 170 F
⩥ What test is performed on re-tubed (repaired) boiler and what is the
water temp.? Answer: Hydrostatic test at 70F
⩥ T/F: The amount of draft is not affected by the height of the stack.
Answer: False
⩥ Under what ASME section is the care and operation of heating
boilers? Answer: Section VI (6)
⩥ A aquastat is sensitive to changes in: Answer: Water temperature
⩥ The expansion tank in a hot water system allows for the expansion of:
Answer: Water
⩥ Who can adjust a safety valve? Answer: Manufacturer Representative
QUESTIONS EXAMINATION TEST 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Carryover can lead to: Answer: Water Hammer
⩥ Water column & gauge glass should be blown down: Answer: Daily
⩥ If water leaves the boiler at 170•, what temperature does it return at?
Answer: 150•
⩥ What is the most common cause of cast iron boiler failure? Answer:
Cracking
⩥ The positioning control cannot function without: Answer: Air
⩥ What is the most common of problems in a hot water system?
Answer: Air
⩥ What fire tube is most efficient? Answer: 4 Pass
,⩥ Where are the combustion gases on a serpentine boiler? Answer:
Below the tubes
⩥ What is the purpose of a check valve? Answer: To Prevent reverse
flow & Allow flow in one direction
⩥ A solenoid valve: Answer: Is an automatic gas shutoff valve
⩥ The most common type of pressure control device used is the:
Answer: Mercury Tube
⩥ A steam gauge is calibrated in: Answer: Lbs/Sq. Inch
⩥ Heavy soot on the fireside of tubes: Answer: Should be removed for
better heat transfer
⩥ What code is a heating boiler built to: Answer: ASME Section IV(4)
⩥ When connecting a Bourdon tube steam gauge to a boiler, a pigtail is
used to: Answer: Protect Bourdon tube from steam
⩥ External feed water treatment can be a _____ process. Answer: Cold
lime soda, hot lime soda, or ion exchange
, ⩥ Natural water may contain: Answer: Solids and other pollutions
⩥ What is the min. temp of a hot water boiler operation to prevent
condensation? Answer: 170 F
⩥ What test is performed on re-tubed (repaired) boiler and what is the
water temp.? Answer: Hydrostatic test at 70F
⩥ T/F: The amount of draft is not affected by the height of the stack.
Answer: False
⩥ Under what ASME section is the care and operation of heating
boilers? Answer: Section VI (6)
⩥ A aquastat is sensitive to changes in: Answer: Water temperature
⩥ The expansion tank in a hot water system allows for the expansion of:
Answer: Water
⩥ Who can adjust a safety valve? Answer: Manufacturer Representative
