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UNIT 82 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
82-1) Define hydronics.
82-2) What was the common choice for hydronic piping in the past and how is that
changing?
82-3) What are the advantages of hot water heating systems based on overall
comfort?
82-4) What are the disadvantages of hot water heating systems?
82-5) What safety measures are used to allow for expansion in a hot water heating
system?
82-6) What provisions should be made to prevent water from freezing during low
temperature periods of operation for a hydronic heating system??
82-7) Why is it important when working on electrical components such as pump
motors to make sure that all of the water in the system has been removed??
82-8) List the different types of terminal units used for hot water heating systems.
82-9) How does a can coil unit differ from a convector?
82-10) What are the advantages of radiant floor heating?
82-11) Describe a series loop, single circuit hot water piping system.
In this piping system the main supply pipe from the boiler enters the first
82-12) What is the purpose of the venturi on a one pipe venturi system, single
circuit?
82-13) What is the advantage to a two-pipe system, direct return?
82-14) How does a two pipe system, reverse return differ from a two pipe system,
direct return?
82-15) How is hot water controlled to a zone?
82-16) How is the water returned from a zone to the boiler?
82-17) How does a motorized zone control valve work?
82-18) What are mixing valves used for?
82-19) Why might mixing valves be used for radiant floor heating?
82-20) How does a radiant floor heating system transfer heat?
82-21) How does an open piping system differ from a closed type piping system?
