Steam

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Author:
TWilson88
ID:
276286
Filename:
Steam
Updated:
2014-06-10 23:19:52
Tags:
Steam
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Questions that are on the test
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  1. An increase in pressure will cause the boiling temperature of a liquid to decrease.

    True or False
    False
  2. It is possible to boil water at 78 degrees F.

    True or False
    True
  3. When steam is superheating, its pressure and temperature are increased.

    True or False
    False
  4. A low-pressure steam boiler is designed to operate at pressures up to 30 psig.

    True or False
    False
  5. The line that supplies steam directly to the heating units is called a dry supply.

    True or False
    False
  6. A compound gage should never be installed on a low-pressure steam boiler.

    True or False
    False
  7. Thermodynamic steam traps operate due to the difference in the thermal energy or heat content between the steam and the condensate.

    True or False
    True
  8. The discharge of condensate from an inverted bucket steam trap is continuous.

    True or False
    False
  9. An inverted bucket steam trap should be installed if a large amount of air must be quickly removed from a steam system.

    True or False
    False
  10. The water level in a boiler feed pump receiver is mechanically maintained.

    True or False
    True
  11. Steam mains should be pitched in the direction of flow.

    True or False
    True
  12. Reducing the pipe size in a horizontal steam main requires the use of a concentric reducer.

    True or False
    False
  13. Unreamed system piping may cause water hammer.

    True or False
    True
  14. When pipe is heated, its length and width are increased.

    True or False
    True
  15. Steam mains, piping, etc. that are tied into a dry return must utilize a steam trap.

    True or False
    True
  16. Cast-iron boilers are only manufactured in small sizes for residential use.

    True or False
    False
  17. A mechanical water feeder must be installed on a boiler that is supplied by a boiler feed pump.

    True or False
    True
  18. A dry pipe must be used in the design of a boiler to insure the delivery of dry steam.

    True or False
    False
  19. Boiler blow down can be either surface or bottom blow down.

    True or False
    True
  20. A swing check valve cannot be used as a vacuum breaker.

    True or False
    False
  21. Heat that can be indicated with a thermometer is called ____
    Sensible Heat
  22. The type of heat that is absorbed or liberated when a substance undergoes a change of state is ___
    Latent Heat
  23. The instantaneous change of state from a liquid to a vapor which takes place when a liquid flows from a high to a low pressure area, without a corresponding drop in temperature, is called ___
    Flashing
  24. The device that controls the pressure in a low-pressure steam boiler is called a ___
    Pressuretrol
  25. The safety relief valve that is installed on a low-pressure steam boiler opens when the boiler pressure reaches ___
    15 psig and reseats at 12 psig
  26. A pipe siphon (pigtail) forms a water seal that prevents raw steam from entering and damaging the ___
    Pressure gage
  27. The two basic types of low-water cutoffs are ___
    Float type and electric probe type
  28. The line that connects the steam header to a boiler return line is the ___
    Equalizing line
  29. The arrangement of the return piping on a steam boiler that would reduce the likelihood of a low water condition in the boiler is called a/an ___
    Hartford loop
  30. The return that cannot contain air or steam is called a ___
    Wet return
  31. The return line that could contain air, steam or water is called a ___
    Dry return
  32. That "A" dimension, the length of pipe used to overcome the pressure drop in a one-pipe gravity steam heating system, should be ___
    28" long
  33. Pockets of condensate in steam lines could result in ___
    Water hammer
  34. The device that prevents a vacuum from forming inside a one-pipe gravity return steam heating system is a/an ___
    Air vent
  35. The carryover of small particles of water into steam piping is known as ___
    Priming
  36. The rapid fluctuation of the water level in a boiler which is created by impurities on the surface of the water is called ___
    Foaming
  37. Steam flow into the radiators in a one-pipe gravity return steam heating system can be controlled by ___
    Installing an air vent with a different air venting capacity
  38. A thermostatic trap that failed in the closed position would cause a heating unit to become ___
    Waterlogged
  39. Condensate in steam lines could result in ___
    Water hammer
  40. In a two-pipe gravity return system, the device that prevents raw steam from entering the condensate return piping is a ___
    Steam trap
  41. The pump motor on a condensate receiver is usually started by ___
    A high water level in the reciever
  42. The pump motor on a boiler feed pump is started when there is ___
    A low water condition in the boiler
  43. The device that is used to regulate the discharge pressure of condensate pump is a ___
    Plug cock
  44. High-pressure boilers are usually rated in boiler horsepower and operate at pressures above ___
    15 psig
  45. The fireside surfaces in a water-tube boiler are cleaned using a ___
    Soot blower
  46. Certain fittings and accessories are required by codes for a boiler to operate safely and efficiently. What organization is primarily responsible for development of these codes?
    ASME
  47. The main vent in a one-pipe gravity return steam heating system should be located ___ to ___ inches from the end of the last steam carrying main.
    15, 18
  48. Steam traps remove ___ and  ___ from steam lines.
    Water, air
  49. A ___ is used to protect condensate pumps from dirt, slag, etc.
    Strainer
  50. Steam boilers that are operated up to ___ are called low-pressure boilers.
    15 psig
  51. A dry return line can contain air, steam or water.

    True or False
    True
  52. Steam flow into radiators in a two-pipe gravity return steam heating system cannot be regulated.  

    True or False
    False
  53. Pockets of condensate in steam lines could result in priming.

    True or False
    False
  54. The safety relief valve on a low-pressure steam boiler will open at 30 psig and close at 27 psig.  

    True or False
    False
  55. Flashing is the instantaneous change of state from a liquid to a vapor that takes place when a liquid flows from a high to a low pressure area without a corresponding drop in temperature.  

    True or False
    True
  56. An increase in pressure will cause the boiling temperature of a liquid to increase.

    True or False
    True
  57. The supply and return piping in a vacuum steam heating system is one size smaller than it is in a mechanical condensate return system.

    True or False
    True
  58. In a vapor steam heating system, circulation is created by a vacuum pump.

    True or False
    False
  59. Under no conditions can condensate from a low pressure steam trap be elevated into a low-pressure condensate return main.

    True or False
    False
  60. In a closed feedwater heater, water and steam do not come into direct contact with each other.

    True or False
    True
  61. Pockets of condensate in steam lines could result in priming.

    True or False
    False
  62. The safety relief valve on a low-pressure steam boiler will open at 30 psig and close at 27 psig.

    True or False
    False
  63. Priming is caused by the carryover of small particles of water droplets into the steam piping.

    True or False
    True
  64. Latent heat can be indicated with a thermometer.

    True or False
    False
  65. The type of heat that is absorbed or liberated when a substance undergoes a change of state is specific heat. 

    True or False
    False
  66. Flashing is the instantaneous change of state from a liquid to a vapor that takes place when a liquid flows from a high to a low pressure area without a corresponding drop in temperature.

    True or False
    True
  67. An increase in pressure will cause the boiling temperature of a liquid to increase.

    True or False
    True
  68. It is possible to boil water at 50 degrees F.

    True or False
    True
  69. An inverted bucket steam trap should not be installed in a steam heating system if large amounts of air are present in the system and they must be quickly vented.  

    True or False
    False
  70. Reducing the pipe size in a horizontal steam main requires the use of a concentric reducer.

    True or False
    False
  71. The water level in the condensate receiver serving a boiler feed pump is mechanically maintained.

    True or False
    True
  72. The device which forms a water seal that prevents raw steam from entering and damaging pressure gages, vaporstats, pressuretrols, etc. is a/an:
    Pigtail
  73. In a one-pipe gravity return steam heating system, the main vent should be installed:
    15 to 18 inches back from the end of the last steam carrying main
  74. A thermostatic steam trap that fails in the closed position would cause a heating unit to become:
    Waterlogged
  75. If the float in a F&T trap failed and filled with water, the trap would:
    No condensate would be discharged
  76. In order to return condensate to a boiler, the height of the water column needed to overcome is:
    28 inches for each pound of pressure the boiler is producing
  77. Superheater tubes are protected from waring or burning out by:
    circulating steam through them
  78. To increase the life of furnace refractory, water-tube boilers are equipped with:
    Water walls
  79. The bottom of a steam main must be at least 15 to ___ inches above the boiler water line.
    18
  80. The Hartford loop should be tied into the equalizing line 2 to ___ inches below the water line in a steam boiler.
    4
  81. With a constant flow of steam passing through a steam main, a decrease in pipe size would cause a/an ___ in velocity.
    Increase
  82. A draft fan located between a boiler and the chimney is used in an ___ draft system.
    Induced

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