Air Conditioning Systems Overview
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Questions and Answers

Which joint type uses a flaring tool during the connection process?

  • Rubber Ring Joint
  • Solder Fusion
  • Hubless Joint Coupling
  • Flared Joint (correct)

    • What is a characteristic of a flange union?

  • Alternative to welded and screwed systems (correct)
  • Uses a single pipe end piece
  • Requires soldering for installation
  • Uses rubber rings for sealing

    • Which valve type is typically used to prevent backflow in plumbing systems?

  • Compression Valve
  • Butterfly Valve
  • Check Valve (correct)
  • Angle Valve

    • What does a metered valve usually control?

    <p>Flow Rate Measurement</p> Signup and view all the answers

    Which type of cock operates with a rising stem design?

    <p>Corporation Cock</p> Signup and view all the answers

    What differentiates a double nipple from a single nipple in plumbing fittings?

    <p>Number of connection ends</p> Signup and view all the answers

    Which fitting type allows for angular adjustments in piping layouts?

    <p>Offset Bend</p> Signup and view all the answers

    What is the common feature of a globe valve?

    <p>Regulates flow with a spherical body</p> Signup and view all the answers

    What is the primary purpose of chlorination in water purification?

    <p>To kill bacteria</p> Signup and view all the answers

    Which water purification method involves the use of coagulants?

    <p>Coagulation &amp; Precipitation</p> Signup and view all the answers

    What is the purpose of filtration in water purification?

    <p>To remove finer suspended particles</p> Signup and view all the answers

    In which type of pump is water drawn in only with one motion?

    <p>Single Action Piston Pump</p> Signup and view all the answers

    What does sedimentation primarily involve in the context of water purification?

    <p>A settling process for suspended particles</p> Signup and view all the answers

    Which method of water purification uses a special filter membrane?

    <p>Reverse Osmosis</p> Signup and view all the answers

    What is the recommended distance a well should be from pollution sources?

    <p>At least 50 ft or 15 m</p> Signup and view all the answers

    Which of the following describes the process of flocculation?

    <p>Combining small particles into larger aggregates</p> Signup and view all the answers

    What is the primary function of UV radiation in water treatment?

    <p>To kill organisms through exposure</p> Signup and view all the answers

    What distinguishes a Two Stage Pump from a Single Stage Pump?

    <p>It contains multiple impellers for medium head service</p> Signup and view all the answers

    What type of well construction method is most vulnerable to surface pollution?

    <p>Dug Well</p> Signup and view all the answers

    Which pump type is best suited for handling viscous fluids?

    <p>Rotary Pump</p> Signup and view all the answers

    What is a characteristic of a Submersible Pump?

    <p>Is fully immersible in water</p> Signup and view all the answers

    Which well construction method uses a well auger and casing?

    <p>Bored Well</p> Signup and view all the answers

    Which type of pump is specifically designed to discharge water from a well?

    <p>Jet Pump</p> Signup and view all the answers

    What is the primary advantage of a Multi Stage Pump?

    <p>It is designed for high head service</p> Signup and view all the answers

    Which statement best describes a Driven Well?

    <p>It is constructed using well points and pile drivers</p> Signup and view all the answers

    What role does the Neutralizing Tank play in water treatment?

    <p>It filters water using marble or limestone</p> Signup and view all the answers

    What is the primary purpose of a central chilled water system?

    <p>Generates chilled water for cooling air</p> Signup and view all the answers

    Which of the following best describes the function of an air handling unit (AHU)?

    <p>Conditions and circulates air</p> Signup and view all the answers

    In a split air conditioning system, what do the small diameter and large diameter pipes represent?

    <p>Liquid line and gas line</p> Signup and view all the answers

    Which component is responsible for producing chilled water in a central chilled water system?

    <p>Chiller</p> Signup and view all the answers

    What type of damper is typically set during the initial startup of an air distribution system?

    <p>Manual Damper</p> Signup and view all the answers

    Which type of air distribution system maintains a constant airflow while varying the temperature?

    <p>Constant Air Volume (CAV)</p> Signup and view all the answers

    What is the primary function of cooling towers in a central chilled water system?

    <p>Removes heat from the chilled water system</p> Signup and view all the answers

    What type of filter is designed to remove high-efficiency particulate matter from the air?

    <p>High-efficiency Particulate Arresting Filter (HEPA)</p> Signup and view all the answers

    What component in the air distribution system allows for the control of airflow volume?

    <p>Control Damper</p> Signup and view all the answers

    Which type of duct is suitable for conveying air in a cooling or heating application?

    <p>Flexible Duct</p> Signup and view all the answers

    What is the role of a variable frequency drive in HVAC systems?

    <p>Adjusts motor speed for energy efficiency</p> Signup and view all the answers

    Which of the following components is NOT typically part of a split air conditioning system?

    <p>Chiller</p> Signup and view all the answers

    What type of air outlet is commonly used to distribute conditioned air into a room?

    <p>Diffuser</p> Signup and view all the answers

    What is the primary purpose of a regulator in a gas system?

    <p>To reduce pressure of gas to the proper operating pressure</p> Signup and view all the answers

    Which precaution is necessary when installing a gas cylinder?

    <p>Install it in an area with sufficient ventilation</p> Signup and view all the answers

    What should not be used to check for gas leakage?

    <p>Sources of ignition</p> Signup and view all the answers

    What type of test is performed to check for leaks in a water system?

    <p>Hydrostatic Water Test</p> Signup and view all the answers

    Why should piping not be run in areas like elevator shafts or chimneys?

    <p>To avoid potential gas leaks and maintain safety</p> Signup and view all the answers

    What is a critical requirement for gas piping installations?

    <p>No joints should exist at points where the pipe passes through walls</p> Signup and view all the answers

    How should a pigtail be oriented during installation?

    <p>Downward to prevent rainwater entry</p> Signup and view all the answers

    What should be done with defective pipes and fittings in a gas system?

    <p>They should be replaced immediately</p> Signup and view all the answers

    What is an essential feature for appliances connected to gas lines?

    <p>They must have a suitable gas line shut-off valve</p> Signup and view all the answers

    What is a safe method to ensure a gas system is gas tight?

    <p>Employing a soap solution test</p> Signup and view all the answers

    Study Notes

    Air Conditioning Systems

    • Packaged Terminal - Self-contained units with internal compressor, condenser, and evaporator
    • Split System - Separated into a condenser unit and a fan coil unit connected by two copper pipes: Liquid Line (small diameter) and Gas Line (large diameter)
      • Condenser unit (Outdoor) - Compressor, Condensing Coil, Expansion Valve
      • Fan Coil unit (Indoor) - Evaporator
    • Multi-Split - Central condenser unit connected to multiple fan coil units

    Central Chilled Water Systems

    • Cool water is produced centrally and used by air handling units (AHUs) and fan coil units (FCUs) to cool air
    • Air handling unit (AHU) - Conditions and circulates air
    • Cooling tower - Removes heat from chilled water
    • Common Components:
      • Chiller - Produces chilled water for removing heat from the building
        • Located indoors if a cooling tower is part of the system, outdoors if not
      • Ducting
    • Other Components
      • Pre-cooled AHU
      • Fresh Air Handling Unit
      • Energy Recovery Ventilation
      • Pumps and Controls

    Cool Thermal Storage

    • Chilled water is produced and stored or a phase change in water is generated to store ice during low cooling demand periods.
    • The stored energy is used during peak periods.

    Air Distribution Systems

    • Constant Air Volume (CAV) - Steady airflow and varying temperature
    • Variable Air Volume (VAV) - Varying airflow and constant temperature

    Distribution Components

    • Duct
      • Section - Round, Oval, Rectangular
      • Materials:
        • Rigid Aluminum (gauge 23-26)
        • Rigid Steel (gauge 26-30)
        • Rigid uPVC, PP, or ABS
        • Fiberglass Composite
        • Fabric duct (polyester)
        • Flexible Duct
      • Designation - Supply, Return, Exhaust, Fresh, Pressurized, Mixed
      • Installation - Fiberglass, Polystyrene, Polyethelene
    • Dampers:
      • Type:
        • Manual Damper - Set during initial startup of the system
        • Automatic Damper - Responds to temperature or pressure changes, or can be remotely controlled
        • Backdraft Dampers
        • Smoke Dampers
        • Fire Dampers
        • Combination Smoke and Fire Dampers
    • Fans:
      • Types
        • Axial - Discharges air in the same direction
          • Propeller - Moves large volume of air against low static pressure
          • Vaned axial - Most common due to minimal change in airflow
          • Tube axial - Propelled encased in a duct
        • Centrifugal - Air makes a 90° turn from inlet to outlet
    • Motors:
      • Electric motors known as drives
      • Common names:
        • Variable Frequency Drive
        • Variable Frequency Inverter
        • Variable State Drive

    Control Components

    • Volume Control:
      • *Type:
        • Single Blade
        • Multi-Blade - Can be opposed or parallel
    • Damper
    • Sensing Equipment:
      • Humidistat
      • Thermostat
      • Pressure Regulator
    • Actuating Equipment:
      • Damper
      • Control Valves
      • Relays

    Air Cleaning Components

    • Dry Filter
    • Viscous Filter
    • Water Spray
    • Eliminator Plates
    • Mechanical Filter
    • Panel (Flat) Filter
    • High-efficiency Particulate Arresting Filter
    • Sound-attenuating Filter

    Cooling and Heating Components

    • Cooling:
      • Water Sprays
      • Cooling Coils
    • Heating:
      • Tempering Coils - Contain steam for heating air
      • Water Heaters - Heated water is used in a spray chamber to add heat and humidity to the air
    • Media:
      • Gasoline
      • Grease
      • Tar
      • Oil and Water (for hydraulic systems)
      • Acid
      • Ammonia
      • High Pressure Air
      • High Pressure Steam
      • Low Pressure Steam
      • Boiler Feed Water
      • Hot Water
      • High Pressure Water (excluding boiler feed)

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    Related Documents

    Structural Conceptualization PDF

    Description

    This quiz covers the different types of air conditioning systems, including Packaged Terminal, Split, and Multi-Split systems, as well as Central Chilled Water Systems. You will learn about their components, such as condensers, evaporators, and air handling units. Test your knowledge on the functionalities and setups of these essential climate control technologies.

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