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






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






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






4. 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.






5. 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.






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






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






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






9. ____ 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






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






11. ____ 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.






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






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






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






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






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






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






18. 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.






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






20. 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.






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






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






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






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






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