A piping system that has the main supply pipe from the boiler enter the first baseboard unit, all baseboard sections connected in series, and the outlet from the last baseboard section connected to the circulator pump, which connects to the boiler, is called a:
A) Series loop, single circuit hot water piping system.
B) Two-pipe, reverse return hot water piping system.
C) Series loop, double circuit.
D) One-pipe, venturi piping system.
[Ques. 2] A closed-loop system is practical only when:
A) There is an adequate supply of water, it is of good quality, and local codes and regulations permit groundwater disposal.
B) The geology, hydrology, and land availability meet the requirements for system installation.
C) Loops are closed vertically, because they take up significantly less space.
D) Loops are closed horizontally, because they are the most economical.
[Ques. 3] A water-source system that gets its water from a well and does not reuse the water is:
A) A closed-loop system.
B) An open-loop system.
C) Considered a hybrid between an open- and a closed-loop system.
D) Called a quasi-closed loop because it still uses a circulating pump.
[Ques. 4] What does the equivalent length of a duct fitting mean?
A) It is a factor that allows comparison of two different-diameter ducts.
B) It is the maximum length that any duct run may be.
C) It is the length of straight duct that would have a pressure drop equal to the pressure drop through the fitting.
D) It is the length that air will travel after it leaves a supply register.
[Ques. 5] Which type of duct should NOT be allowed to pass through fire-rated walls?
A) Galvanized sheet metal duct B) Flexible duct connector
C) Ductboard D) Flexible duct
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