Ac332 Gas Heat

47 Questions | Total Attempts: 357

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Air Force Quizzes & Trivia

There are different ways to produce heat and gas is one of the most common ways and this heat can be used to power up machines and cook. Are you in the air force and have some knowledge on gas heat? Take up the quiz below and see how much you know so far.


Questions and Answers
  • 1. 
    • A. 

      Get blown out

    • B. 

      "lift" off the burner rack

    • C. 

      Make noise

    • D. 

      Both b and c

  • 2. 
    A furnace with a vertical air flow through the heat exchanger and the blower compartment beneath the heat exchanger is called a(n) ______.
    • A. 

      Upflow

    • B. 

      Downflow

    • C. 

      Low boy

    • D. 

      Horizontal

  • 3. 
    The proper color of a gas flame is ______.
    • A. 

      Sharp all blue

    • B. 

      Lazy all blue

    • C. 

      Blue with slight orange tips

    • D. 

      Lazy with yellow tips

  • 4. 
    Primary air adjusters on atmospheric type gas burners are usually ______.
    • A. 

      Butterfly shutters

    • B. 

      Sliding sleeves

    • C. 

      Spoilers screws

    • D. 

      All of the above

  • 5. 
    The orifice is a precisely sized hole in the ______.
    • A. 

      Manifold

    • B. 

      Spud

    • C. 

      Burner tube

    • D. 

      Combustion chamber

  • 6. 
    In a conventional gas furnace, the hot flue gases are ______.
    • A. 

      Forced out a PVC vent with a blower

    • B. 

      Recycled through a secondary heat exchanger and then vented through a draft diverter

    • C. 

      Forced through a type B vent by a blower

    • D. 

      Vented by natural convection

  • 7. 
    A condensing gas furnace uses ______ from a condensing type heat exchanger to increase the furnace efficiency.
    • A. 

      Sensible heat

    • B. 

      Latent heat

    • C. 

      Superheat

    • D. 

      Subcooling

  • 8. 
    The reason for using zones valves on a hydronic heating system is to ______.
    • A. 

      Allow different areas of the structure to maintain different temperatures

    • B. 

      Reduce the chance of a water leak

    • C. 

      Prevent unused parts of the house from getting warm, and wasting energy

    • D. 

      Both a and c

  • 9. 
    Air in a hydronic system can cause ______.
    • A. 

      Reduced water circulation

    • B. 

      Increased efficiency

    • C. 

      Corrosion

    • D. 

      Both a and c

  • 10. 
    A pressure relief valve is set at 30 psig.  The valve is constantly opening and flooding the floor.  What should the technician do?
    • A. 

      Increase the set point of the relief valve to 40 psig.

    • B. 

      Find the cause of overfiring.

    • C. 

      Put a bucket under the valve.

    • D. 

      Both a and c are correct.

  • 11. 
    A series loop hydronic system is not desirable for use in a large residence because ______.
    • A. 

      All of the heated water will flow to all the rooms

    • B. 

      Some rooms will overheat before other rooms are warm

    • C. 

      They are extremely noisy

    • D. 

      Both a and b

  • 12. 
    A limit control on a hot water boiler is need to ______.
    • A. 

      Regulate the amount of water to each section of baseboard

    • B. 

      Regulate the water in the supply line to the boiler

    • C. 

      Balance the water flow rate in the piping system

    • D. 

      Protect the boiler against excessive water temperatures

  • 13. 
    The pressure relief valve ______.
    • A. 

      Regulates the pressure of the water in the supply line

    • B. 

      Is set to relieve the pressure in the boiler below the maximum design pressure of the boiler

    • C. 

      Shuts the boiler off if the water temperature gets too high

    • D. 

      Relieve the pressure in the expansion tank

  • 14. 
    The expansion tank provides a means of removing the air from the system as well as ______.
    • A. 

      Provides a space for excess water from the supply source

    • B. 

      Provides water for the domestic hot water coil

    • C. 

      Provides a space for the water expansion and contraction with water temperature changes

    • D. 

      All of the above

  • 15. 
    An expansion joint is a device used to ______.
    • A. 

      Prevent damage between boiler sections

    • B. 

      Connect the expansion tank into the system

    • C. 

      Allow for expansion and contraction of the loop piping with water temperature changes

    • D. 

      Connect the manual vent into the system

  • 16. 
    In a series loop hydronic heating piping systems, ______.
    • A. 

      The heated water flows in the same direction in parallel pipes

    • B. 

      The heated water flows in the opposite direction in parallel pipes

    • C. 

      Part of the heated water is directed to each terminal unit

    • D. 

      All the heated water flows through all the terminal units

  • 17. 
    A column of water on foot high exerts a pressure of ______.
    • A. 

      0.396 psig

    • B. 

      0.407 psig

    • C. 

      0.433 psig

    • D. 

      0.496 psig

  • 18. 
    Air in the hot water circulating system will cause ______.
    • A. 

      Corrosion

    • B. 

      Noise

    • C. 

      Flow blockage

    • D. 

      All of the above

  • 19. 
    If flue gases are not vented properly, carbon monoxide poisoning could result.
    • A. 

      True

    • B. 

      False

  • 20. 
    Liquified petroleum (LP) is heavier than air and can cause suffocation if not handled properly.
    • A. 

      True

    • B. 

      False

  • 21. 
    A gas furnace designed for use with natural gas can be used with liquified petroleum (LP) with no system modifications.
    • A. 

      True

    • B. 

      False

  • 22. 
    A gas flame will carry electrical energy.
    • A. 

      True

    • B. 

      False

  • 23. 
    In the USA, natural gas suppliers supply gas with a heat content of about 1,050 Btu/cu. ft.
    • A. 

      True

    • B. 

      False

  • 24. 
    The gas flame will lift off the burner and be noisy if it receives too much primary air.
    • A. 

      True

    • B. 

      False

  • 25. 
    When an oil or gas boiler is used, the water chamber is divided into smaller compartments to increase the surface area on which the heat can act.
    • A. 

      True

    • B. 

      False

  • 26. 
    If a parallel hydronic system is installed, it may be necessary to bleed air from each of the parallel circuits.
    • A. 

      True

    • B. 

      False

  • 27. 
    Expansion tanks must always be bled from the top until all of the air is removed from it.
    • A. 

      True

    • B. 

      False

  • 28. 
    It is possible for a hydronic system with many zones to operate with one circulation pump.
    • A. 

      True

    • B. 

      False

  • 29. 
    Hydronic heat circulators are centrifugal pumps.
    • A. 

      True

    • B. 

      False

  • 30. 
    In a series loop, the water going through the last terminal unit will be the same temperature as the water through the first terminal unit.
    • A. 

      True

    • B. 

      False

  • 31. 
    The only place a bleed valve is needed is on the top of the boiler.
    • A. 

      True

    • B. 

      False

  • 32. 
    A tankless domestic water system provides hot water from a coil in the boiler.
    • A. 

      True

    • B. 

      False

  • 33. 
    Butterfly shutters and sliding sleeves are examples of ______ and are used on atmospheric type gas burners.
  • 34. 
    Three products of complete combustion of natural and LP gas are ______, ______, and ______.
  • 35. 
    Another name for a downflow heating unit is ______.
  • 36. 
    A furnace with a horizontal heat exchanger and a propeller fan for moving air through the heat exhanger is called a ______.
  • 37. 
    The dangerous by-product of poor combustion of a gas is ______.
  • 38. 
    Spark ignition is important for roof top or package units located outdoors because of ______ problems.
  • 39. 
    Hydronic heating can refer to both ______ and ______.
  • 40. 
    The device that will shut down a boiler if the water temperature gets too high is called a ______.
  • 41. 
    The most popular way of heating using a hot water system is by the use of ______ on the other outer walls of the area.
  • 42. 
    The zone control valves are controlled by ______.
  • 43. 
    The main source of air into a hydronic system is the ______.
  • 44. 
    Hot water boiler limit controls are usually set at ______ °F.
  • 45. 
    Circulators in hydronic systems use impellers with vanes between side panels.  These are called ______ impellers.
  • 46. 
    The material used to make circular impellers is ______.
  • 47. 
    An automatic air bleed valve controls the airflows out of the system by means of a ______.