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