Black Seal Test |232 Questions and 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: - -Water temperature
-The expansion tank in a hot water system allows for the expansion of: - -Water
-Who can adjust a safety valve? - -Manufacturer Representative
-As the water in a hot water system expands: - -The pressure remains constant
-A modulating pressuretrol controls: - -The boiler's high and low fire
-The pressuretrol: - -Turns the boiler on and off
-A modulating pressure control is sensitive to: - -Pressure
-A vaporstat is sensitive to: - -Gas Pressure
-The low water fuel cut-off should be blown down: - -Daily
-When the vaporstat starts operating, it activates the: - -Fuel line solenoid valve
-A low water fuel cutoff: - -Shuts off the fuel supply
-If a baffle breaks, what happens? - -Increase of furnace gases & stack temperature
-Natural draft is produced by: - -Difference in temperature outside chimney from inside
chimney
-When would a high suction line be used in a fuel tank? - -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? - -
Induced Draft
-Smoke indicators are important because: - -Operator cannot view smoking conditions
-The main purpose of testing a safety valve is to: - -Make sure valve operates freely
-When is the most positive way of checking the water level in a boiler? - -Try cocks
-When testing a safety valve by hand, you must: - -Have at least 75% of popping pressure
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: - -Water temperature
-The expansion tank in a hot water system allows for the expansion of: - -Water
-Who can adjust a safety valve? - -Manufacturer Representative
-As the water in a hot water system expands: - -The pressure remains constant
-A modulating pressuretrol controls: - -The boiler's high and low fire
-The pressuretrol: - -Turns the boiler on and off
-A modulating pressure control is sensitive to: - -Pressure
-A vaporstat is sensitive to: - -Gas Pressure
-The low water fuel cut-off should be blown down: - -Daily
-When the vaporstat starts operating, it activates the: - -Fuel line solenoid valve
-A low water fuel cutoff: - -Shuts off the fuel supply
-If a baffle breaks, what happens? - -Increase of furnace gases & stack temperature
-Natural draft is produced by: - -Difference in temperature outside chimney from inside
chimney
-When would a high suction line be used in a fuel tank? - -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? - -
Induced Draft
-Smoke indicators are important because: - -Operator cannot view smoking conditions
-The main purpose of testing a safety valve is to: - -Make sure valve operates freely
-When is the most positive way of checking the water level in a boiler? - -Try cocks
-When testing a safety valve by hand, you must: - -Have at least 75% of popping pressure
