What does PSIA stand for? - Answer Psig + atmospheric pressure
Carryover can lead to: - Answer Water Hammer
Water column & gauge glass should be blown down: - Answer Daily
If water leaves the boiler at 170•, what temperature does it return at? - Answer 150•
What is the m...
Black Seal Test Questions Fully
Answered.
What does PSIA stand for? - Answer Psig + atmospheric pressure
Carryover can lead to: - Answer Water Hammer
Water column & gauge glass should be blown down: - Answer Daily
If water leaves the boiler at 170•, what temperature does it return at? - Answer 150•
What is the most common cause of cast iron boiler failure? - Answer Cracking
The positioning control cannot function without: - Answer Air
What is the most common of problems in a hot water system? - Answer Air
What fire tube is most efficient? - Answer 4 Pass
Where are the combustion gases on a serpentine boiler? - Answer Below the tubes
What is the purpose of a check valve? - Answer To Prevent reverse flow & Allow flow in one direction
A solenoid valve: - Answer Is an automatic gas shutoff valve
The most common type of pressure control device used is the: - Answer Mercury Tube
A steam gauge is calibrated in: - Answer Lbs/Sq. Inch
,Heavy soot on the fireside of tubes: - Answer Should be removed for better heat transfer
What code is a heating boiler built to: - Answer ASME Section IV(4)
When connecting a Bourdon tube steam gauge to a boiler, a pigtail is used to: - Answer Protect
Bourdon tube from steam
External feed water treatment can be a _____ process. - Answer Cold lime soda, hot lime soda, or ion
exchange
Natural water may contain: - Answer Solids and other pollutions
What is the min. temp of a hot water boiler operation to prevent condensation? - Answer 170 F
What test is performed on re-tubed (repaired) boiler and what is the water temp.? - Answer
Hydrostatic test at 70F
T/F: The amount of draft is not affected by the height of the stack. - Answer False
Under what ASME section is the care and operation of heating boilers? - Answer Section VI (6)
A aquastat is sensitive to changes in: - Answer Water temperature
The expansion tank in a hot water system allows for the expansion of: - Answer Water
Who can adjust a safety valve? - Answer Manufacturer Representative
As the water in a hot water system expands: - Answer The pressure remains constant
, A modulating pressuretrol controls: - Answer The boiler's high and low fire
The pressuretrol: - Answer Turns the boiler on and off
A modulating pressure control is sensitive to: - Answer Pressure
A vaporstat is sensitive to: - Answer Gas Pressure
The low water fuel cut-off should be blown down: - Answer Daily
When the vaporstat starts operating, it activates the: - Answer Fuel line solenoid valve
A low water fuel cutoff: - Answer Shuts off the fuel supply
If a baffle breaks, what happens? - Answer Increase of furnace gases & stack temperature
Natural draft is produced by: - Answer Difference in temperature outside chimney from inside chimney
When would a high suction line be used in a fuel tank? - Answer When there is sludge or water in the
tank
If a draft fan is located between the boiler and chimney, what type of draft system is it? - Answer
Induced Draft
Smoke indicators are important because: - Answer Operator cannot view smoking conditions
The main purpose of testing a safety valve is to: - Answer Make sure valve operates freely
When is the most positive way of checking the water level in a boiler? - Answer Try cocks
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