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Heating Ventilating And Air Conditioning
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Avg score: 70% • Most missed: “The purpose of the ____ is to add or remove heat and moisture and remove undesir…”
Heating Ventilating And Air Conditioning
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25 Questions

1. ____ vary depending on the fluid that is used as a heat exchange medium (usually water or air) - on the particular requirements for the system - and on the type of system that was in style when the building was originally built.

2. The exact amount depends on the HVAC system - but note that ____.

3. A typical fan has three main parts: a ____ - ____ - and the ____.

4. _____ or ____ generally involves air moving through openings.

5. A ____ which uses the vapor- compression refrigeration cycle in reverse mode.

6. Heat generated from _____ is another example in which all of the energy used is generally converted to heat in the immediate space.

7. There are three types of mechanical compressors used in chillers.

8. In a ____ - hot or cold water is pumped through coils and heats or cools air that is drawn around the coil by natural convection or by fans.

9. The HVAC system is responsible for a significant portion of the energy use and energy cost in most ____ and ____ buildings

10. Another method for saving energy is to reduce ____ to that required by the given environment; the cube law for fan horsepower can be used to estimate possible savings.

11. The control system accomplishes its function through a system of ____ - ____ and ____.

12. Thus - improving the operation of the HVAC system provides many opportunities to _____.

13. The ____ has the advantage that is can accommodate widely differing demands for heating and cooling in different zones of a building by changing the ratio of hot to cold air in each zone.

14. There are four main components in refrigeration unit using the vapor- compression cycle: the ____ - the ____ - the ____ and the ____.

15. An ____ transforms the operating instructions for the desired environmental conditions into the air temperatures and ventilation volumes desired in the working environment.

16. The ____ provides heat or cooling by using a fan to move room air across heating or cooling coils and back into the room.

17. The typical components found in HVAC systems include ____ - ____ - ____ - ____ - ____ - ____ and a ____.

18. Hot air - hot water - and steam are produced using furnaces or boilers which are called ____.

19. ____ are usually used to regulate the flow of outside air into a system or to control the flow from one part of the system to another part - as in the case of a return air damper

20. The efficiencies of air conditioners are usually measured in terms of their ____.

21. Some of the disadvantages of this system include the complexity and difficulty of maintaining the controls - and _____.

22. The source of heat is usually a _____ - a ____ - or the ____.

23. The purpose of the ____ is to add or remove heat and moisture and remove undesirable air components from the facility in order to maintain the desired environmental conditions for people - products or equipment.

24. ____ are being used more now since ventilation standards have changed - and more outside air must now be brought into the facility.

25. In these units - ____ flows through nozzles and induces additional room air flow into the unit.

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