G2 HYDRONICS EXAM 110 QUESTIONS & CORRECT
ANSWERS LATEST 2025
The four subsystems that make up a hydronics space heating system are -
ANSWER-Heat source, distribution system, emitters, control systems
The advantages of a hydronic heating system include - ANSWER-Energy efficiency,
quiet operation, increased comfort levels, space-savings installation
The following appliances require a low-water cut-off device - ANSWER-An
automatically fired hot-water heating boiler when and portion of the circulating
system is located below the boiler's lowest safe water level
Which device protects potable water from non-potable water - ANSWER-Backflow
preventer valve
A boiler where the combustion chamber is surrounded by the water jacket is
known as a - ANSWER-Wet-base boiler
What is the purpose of the water reducing valve - ANSWER-To reduce the
incoming make up water to the boiler to 12 PSI from city water pressure
When is a low water cut off required on a hot water boiler - ANSWER-When
above 400,000 Btu/her rate, or when any part of the boiler system is below the
level of the boiler
, On a steam boiler, if the condensate line fails to return water to the boiler what
controls will turn off the gas flow - ANSWER-Low water cut off
A dry-base boiler is identified as one in which - ANSWER-the fire is only under the
water jacket
Four common boiler types are - ANSWER-cast-iron sectional, copper fin-tube,
steel fire-tube, steel water-tube
Annual maintenance is critical on a copper fin-tube boiler because of - ANSWER-
tight construction and narrows flue passes in the heat exchange
Low pressure boilers have operation ranges of - ANSWER-30-240 psig, 100-140*F
The major mechanical components of a typical boiler include - ANSWER-Burner
assembly, combustion chamber, flue gas passages, tubes, turbulators, draft
control device
Where must an air vent be installed - ANSWER-At every high point in the system
The device which compensates for the pressure changes due to heating the
hydronics fluid is - ANSWER-Expansion tank
ASME relief valves will activate at - ANSWER-30 psig
ANSWERS LATEST 2025
The four subsystems that make up a hydronics space heating system are -
ANSWER-Heat source, distribution system, emitters, control systems
The advantages of a hydronic heating system include - ANSWER-Energy efficiency,
quiet operation, increased comfort levels, space-savings installation
The following appliances require a low-water cut-off device - ANSWER-An
automatically fired hot-water heating boiler when and portion of the circulating
system is located below the boiler's lowest safe water level
Which device protects potable water from non-potable water - ANSWER-Backflow
preventer valve
A boiler where the combustion chamber is surrounded by the water jacket is
known as a - ANSWER-Wet-base boiler
What is the purpose of the water reducing valve - ANSWER-To reduce the
incoming make up water to the boiler to 12 PSI from city water pressure
When is a low water cut off required on a hot water boiler - ANSWER-When
above 400,000 Btu/her rate, or when any part of the boiler system is below the
level of the boiler
, On a steam boiler, if the condensate line fails to return water to the boiler what
controls will turn off the gas flow - ANSWER-Low water cut off
A dry-base boiler is identified as one in which - ANSWER-the fire is only under the
water jacket
Four common boiler types are - ANSWER-cast-iron sectional, copper fin-tube,
steel fire-tube, steel water-tube
Annual maintenance is critical on a copper fin-tube boiler because of - ANSWER-
tight construction and narrows flue passes in the heat exchange
Low pressure boilers have operation ranges of - ANSWER-30-240 psig, 100-140*F
The major mechanical components of a typical boiler include - ANSWER-Burner
assembly, combustion chamber, flue gas passages, tubes, turbulators, draft
control device
Where must an air vent be installed - ANSWER-At every high point in the system
The device which compensates for the pressure changes due to heating the
hydronics fluid is - ANSWER-Expansion tank
ASME relief valves will activate at - ANSWER-30 psig
