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