UNIT 74 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
74-1) Why are zone control systems used?
74-2) List the components found in a basic zone control system.
Zone control panel
74-3) What three general criteria are used to select zones for a building?
74-4) Explain the reason zone control systems need a method for handling excess air.
74-5) List the methods of handling the excess air in a zone system.
Bypasing supply air to the return.
74-6) Discuss the disadvantages of air bypass.
74-7) Explain the concept of variable air volume in zoning system.
74-8) Explain the difference between two position and modulating damper control.
74-9) Explain how a barometric damper operates.
74-10) List several types of zone dampers.
xOpposed blade damper for rectangular ducts.
74-11) Explain the difference between a basic zone control system and an advanced
zone control system.
74-12) Explain the purpose of using a dump zone in a zone control system and give
an example.
74-13) What is the difference between a communicating zone control system and
a basic zone control system?
74-14) What is the purpose of the master thermostat in the basic zone control
system? The master thermostat determines the operational mode of the
74-15) What is the purpose of discharge air sensors?
74-16) What is the purpose of the outdoor air sensor on a zone control system?
74-17) How are motorized dampers controlled when they are used as bypass dampers
to relieve pressure differential across the blower?
74-18) Describe the added features available on some basic zone control systems?
74-19) How is an Infinity zone control system configured?