Unit 20 Hydronic Heating Systems
with correct answers 2026
Chapter-1---Boilers---correct-answer-
What-prevents-the-water-in-a-hydronic-heating-system-from-boiling-into-steam-when-the-
system-is-operating-above-the-atmospheric-boiling-temprature?---correct-answer-
Pressurization-of-the-system
Which-of-the-following-would-be-considered-a-part-of-a-hydronic-control-system---correct-
answer-Aquastat
What-is-installed-to-protect-potable-water-connections-to-a-boiler-(make-up-water-
connections-from-cross-contamination-with-non-potable-boiler-water-or-toxic-substances?---
correct-answer-Back-flow-preventer
What-is-not-an-advantage-of-a-hydronic-heating-system---correct-answer-Fast-reaction-time
What-input-would-require-a-low-water-cut-off-for-a-hot-water-boiler?---correct-answer-500-
MBtu/h
, what-is-used-to-connect-multiple-cast-iron-boiler-sections-together-into-a-boiler-block-
assembly?---correct-answer-Tapered-push-nipples
Which-type-of-boiler-could-be-used-to-directly-heat-domestic-water---correct-answer-Copper-
fin-tube
What-is-the-result-if-flue-gas-combustion-products-are-cooled-below-their-dew-point?---
correct-answer-Condensation
Steel-water-tube-boilers-are-commonly-used-for-the-production-of-water-or-steam---correct-
answer-True
To-present-thermal-stress-damage,-this-type-of-boiler-requires-constant-water-circulation-
during-firing---correct-answer-Copper-fin-tube
Condensing-boilers-are-typically-made-from-what-material?---correct-answer-Stainless-steel
For-atmospheric-boilers,-what-is-the-term-used-to-explain-the-result-if-there-is-no-draft,-a-
backdraft,-or-a-blockage-in-the-venting-system-beyond-the-draft-hood?---correct-answer-
Spillage
What-does-an-automatic-vent-damper-actuator-have-to-control-the-boiler's-burner---correct-
answer-Proving-switch
Chapter-2---Distrbution-and-Control-Systems---correct-answer-
What-is-the-simplest-type-of-hydronic-distribution-system?---correct-answer-Series-loop
with correct answers 2026
Chapter-1---Boilers---correct-answer-
What-prevents-the-water-in-a-hydronic-heating-system-from-boiling-into-steam-when-the-
system-is-operating-above-the-atmospheric-boiling-temprature?---correct-answer-
Pressurization-of-the-system
Which-of-the-following-would-be-considered-a-part-of-a-hydronic-control-system---correct-
answer-Aquastat
What-is-installed-to-protect-potable-water-connections-to-a-boiler-(make-up-water-
connections-from-cross-contamination-with-non-potable-boiler-water-or-toxic-substances?---
correct-answer-Back-flow-preventer
What-is-not-an-advantage-of-a-hydronic-heating-system---correct-answer-Fast-reaction-time
What-input-would-require-a-low-water-cut-off-for-a-hot-water-boiler?---correct-answer-500-
MBtu/h
, what-is-used-to-connect-multiple-cast-iron-boiler-sections-together-into-a-boiler-block-
assembly?---correct-answer-Tapered-push-nipples
Which-type-of-boiler-could-be-used-to-directly-heat-domestic-water---correct-answer-Copper-
fin-tube
What-is-the-result-if-flue-gas-combustion-products-are-cooled-below-their-dew-point?---
correct-answer-Condensation
Steel-water-tube-boilers-are-commonly-used-for-the-production-of-water-or-steam---correct-
answer-True
To-present-thermal-stress-damage,-this-type-of-boiler-requires-constant-water-circulation-
during-firing---correct-answer-Copper-fin-tube
Condensing-boilers-are-typically-made-from-what-material?---correct-answer-Stainless-steel
For-atmospheric-boilers,-what-is-the-term-used-to-explain-the-result-if-there-is-no-draft,-a-
backdraft,-or-a-blockage-in-the-venting-system-beyond-the-draft-hood?---correct-answer-
Spillage
What-does-an-automatic-vent-damper-actuator-have-to-control-the-boiler's-burner---correct-
answer-Proving-switch
Chapter-2---Distrbution-and-Control-Systems---correct-answer-
What-is-the-simplest-type-of-hydronic-distribution-system?---correct-answer-Series-loop
