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BLACK SEAL TEST STUD Y GUIDE | 230
QUESTIONS WITH 100% CORRECT
ANSWERS | VERIFIED | LATEST
UPDATE | 25 PAGES
Question : What does PSIA stand for?
Correct answer: Psig + atmospheric pressure
Question : Carryover can lead to:
Correct answer: Water Hammer
Question : Water column & gauge glass should be blown
down:
Correct answer: Daily
Question : If water leaves the boiler at 170•, what temperature
does it return at?
Correct answer: 150•
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Question : What is the most common cause of cast iron boiler
failure?
Correct answer: Cracking
Question : The positioning control cannot function without:
Correct answer: Air
Question : What is the most common of problems in a hot
water system?
Correct answer: Air
Question : What fire tube is most efficient?
Correct answer: 4 Pass
Question : Where are the combustion gases on a serpentine
boiler?
Correct answer: Below the tubes
Question : What is the purpose of a check valve?
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Correct answer: To Prevent reverse flow & Allow flow in one
direction
Question : A solenoid valve:
Correct answer: Is an automatic gas shutoff valve
Question : The most common type of pressure control device
used is the:
Correct answer: Mercury Tube
Question : A steam gauge is calibrated in:
Correct answer: Lbs/Sq. Inch
Question : Heavy soot on the fireside of tubes:
Correct answer: Should be removed for better heat transfer
Question : What code is a heating boiler built to:
Correct answer: ASME Section IV(4)
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Question : When connecting a Bourdon tube steam gauge to a
boiler, a pigtail is used to:
Correct answer: Protect Bourdon tube from steam
Question : External feed water treatment can be a _____
process.
Correct answer: Cold lime soda, hot lime soda, or ion
exchange
Question : Natural water may contain:
Correct answer: Solids and other pollutions
Question : What is the min. temp of a hot water boiler
operation to prevent condensation?
Correct answer: 170 F
Question : What test is performed on re-tubed (repaired)
boiler and what is the water temp.?