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Test your basic knowledge |
Heating Ventilating And Air Conditioning
Start Test
Study First
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 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.
Save energy and reduce costs.
HVAC control system
Dual- duct system
Typical water system
2. The HVAC system is responsible for a significant portion of the energy use and energy cost in most ____ and ____ buildings
Residential commercial
Reheat system
HVAC systems
Dampers
3. Hot air - hot water - and steam are produced using furnaces or boilers which are called ____.
Infiltration exfiltration
Small compressors Rotary screw compressors Centrifugal compressors
Evaporating 1 pound of water uses about 1040 Btu.
Primary conversion units
4. Some of the disadvantages of this system include the complexity and difficulty of maintaining the controls - and _____.
Lighting
The amount of excess ventilation air
The need to use and control high- velocity airstreams.
Sensors - actuators - communication links.
5. The efficiencies of air conditioners are usually measured in terms of their ____.
Energy Efficiency Ratios or EERs - or their Seasonal Energy Efficiency Ratios or SEERs.
Sensors - actuators - communication links.
Fan coil system
Dual- duct system
6. The source of heat is usually a _____ - a ____ - or the ____.
Reheat system
A motor belts or a chain to transmit power from the motor to the fan blades (many small fans are direct drive) - blades with their housing.
Heat pump system is an HVAC system
Boiler furnace sun
7. 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.
Dual- duct system
Primary conversion units
The amount of excess ventilation air
Lighting
8. The exact amount depends on the HVAC system - but note that ____.
Boiler furnace sun
Reheat system
Evaporating 1 pound of water uses about 1040 Btu.
The amount of excess ventilation air
9. 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.
HVAC systems
Typical water system
HVAC system
HVAC control system
10. There are four main components in refrigeration unit using the vapor- compression cycle: the ____ - the ____ - the ____ and the ____.
Compressor condenser the expansion valve evaporator.
A motor belts or a chain to transmit power from the motor to the fan blades (many small fans are direct drive) - blades with their housing.
The amount of excess ventilation air
Primary conversion units
11. A typical fan has three main parts: a ____ - ____ - and the ____.
HVAC control system
HVAC systems
A motor belts or a chain to transmit power from the motor to the fan blades (many small fans are direct drive) - blades with their housing.
Dampers - grilles - filters - coils - fans - ductwork - control system.
12. There are three types of mechanical compressors used in chillers.
Small compressors Rotary screw compressors Centrifugal compressors
Fan coil system
Boiler furnace sun
Dual- duct system
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.
Dampers - grilles - filters - coils - fans - ductwork - control system.
Dual- duct system
A motor belts or a chain to transmit power from the motor to the fan blades (many small fans are direct drive) - blades with their housing.
The amount of excess ventilation air
14. ____ 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.
High- pressure supply air
Save energy and reduce costs.
HVAC systems
A motor belts or a chain to transmit power from the motor to the fan blades (many small fans are direct drive) - blades with their housing.
15. In these units - ____ flows through nozzles and induces additional room air flow into the unit.
Dual- duct system
High- pressure supply air
Residential commercial
Evaporating 1 pound of water uses about 1040 Btu.
16. The typical components found in HVAC systems include ____ - ____ - ____ - ____ - ____ - ____ and a ____.
Dampers
Lighting
HVAC systems
Dampers - grilles - filters - coils - fans - ductwork - control system.
17. The control system accomplishes its function through a system of ____ - ____ and ____.
Fan coil system
The amount of excess ventilation air
Sensors - actuators - communication links.
HVAC control system
18. The ____ provides heat or cooling by using a fan to move room air across heating or cooling coils and back into the room.
Fan coil system
Residential commercial
Energy Efficiency Ratios or EERs - or their Seasonal Energy Efficiency Ratios or SEERs.
Dampers
19. An ____ transforms the operating instructions for the desired environmental conditions into the air temperatures and ventilation volumes desired in the working environment.
Residential commercial
Sensors - actuators - communication links.
HVAC control system
Save energy and reduce costs.
20. Heat generated from _____ is another example in which all of the energy used is generally converted to heat in the immediate space.
Lighting
Infiltration exfiltration
Dampers
Evaporating 1 pound of water uses about 1040 Btu.
21. ____ are being used more now since ventilation standards have changed - and more outside air must now be brought into the facility.
HVAC systems
Reheat system
Lighting
Compressor condenser the expansion valve evaporator.
22. A ____ which uses the vapor- compression refrigeration cycle in reverse mode.
Dual- duct system
Heat pump system is an HVAC system
Residential commercial
Lighting
23. ____ 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
The amount of excess ventilation air
HVAC systems
Dampers
Primary conversion units
24. Thus - improving the operation of the HVAC system provides many opportunities to _____.
HVAC systems
Evaporating 1 pound of water uses about 1040 Btu.
Save energy and reduce costs.
HVAC control system
25. _____ or ____ generally involves air moving through openings.
Infiltration exfiltration
HVAC control system
Reheat system
Save energy and reduce costs.