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