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