Black Seal Test Questions and Answers.

Black Seal Test Questions and Answers




Black Seal Test Questions and Answers
Question 1
What does PSIA stand for?

Correct Answer
Psig + atmospheric pressure



Question 2
Carryover can lead to:
Correct Answer
Water Hammer



Question 3
Water column & gauge glass should be blown down:
Correct Answer
Daily



Question 4
If water leaves the boiler at 170•, what temperature does it return at?
Correct Answer
150•



Question 5
What is the most common cause of cast iron boiler failure?

Correct Answer
Cracking




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, Black Seal Test Questions and Answers




Question 6
The positioning control cannot function without:
Correct Answer
Air



Question 7
What is the most common of problems in a hot water system?
Correct Answer
Air



Question 8
What fire tube is most efficient?
Correct Answer
4 Pass



Question 9
Where are the combustion gases on a serpentine boiler?
Correct Answer
Below the tubes



Question 10
What is the purpose of a check valve?
Correct Answer
To Prevent reverse flow & Allow flow in one direction



Question 11
A solenoid valve:
Correct Answer
Is an automatic gas shutoff valve




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, Black Seal Test Questions and Answers




Question 12
The most common type of pressure control device used is the:
Correct Answer
Mercury Tube



Question 13
A steam gauge is calibrated in:
Correct Answer
Lbs/Sq. Inch



Question 14
Heavy soot on the fireside of tubes:
Correct Answer
Should be removed for better heat transfer



Question 15
What code is a heating boiler built to:
Correct Answer
ASME Section IV(4)



Question 16
When connecting a Bourdon tube steam gauge to a boiler, a pigtail is used to:
Correct Answer
Protect Bourdon tube from steam



Question 17
External feed water treatment can be a _____ process.
Correct Answer
Cold lime soda, hot lime soda, or ion exchange




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, Black Seal Test Questions and Answers




Question 18
Natural water may contain:
Correct Answer
Solids and other pollutions



Question 19
What is the min. temp of a hot water boiler operation to prevent condensation?
Correct Answer
170 F



Question 20
What test is performed on re-tubed (repaired) boiler and what is the water temp.?
Correct Answer
Hydrostatic test at 70F



Question 21
T/F: The amount of draft is not affected by the height of the stack.
Correct Answer
False



Question 22
Under what ASME section is the care and operation of heating boilers?
Correct Answer
Section VI (6)



Question 23
A aquastat is sensitive to changes in:
Correct Answer
Water temperature




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