Test your basic knowledge |

Heating Ventilating And Air Conditioning

Subject : engineering
Instructions:
  • Answer 25 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In these units - ____ flows through nozzles and induces additional room air flow into the unit.






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






3. 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.






4. ____ 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.






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






6. 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.






7. 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.






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






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






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






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






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






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






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






15. 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.






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






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






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






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






20. ____ 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






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






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






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






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






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