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

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

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

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

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

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

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

8. 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.

9. ____ 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.

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

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

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

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

14. ____ 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

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

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

17. 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.

18. 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.

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

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

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

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

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

24. 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.

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

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