Oxy fuel_cutting_and_welding_and_shielded_metal_arc_welding[1]_(1)[1].txt

Card Set Information

Oxy fuel_cutting_and_welding_and_shielded_metal_arc_welding[1]_(1)[1].txt
2014-06-08 01:27:41

Show Answers:

    • author ""
    • tags ""
    • folders ""
    • description ""
    • fileName "Oxy_fuel_cutting_and_welding_and_shielded_metal_arc_welding[1] (1).txt"
    • cylinders shall be moved by tilting and rolling them on there ------- edges
    • Bottom
  1. Fuel gas cylinders shall be placed with valve ------ whenever in use
    end up
  2. Fuel gas hose and oxygen hose shall be easily __________ from each other
  3. Hose couplings shall be of the type that cannot be unlocked or disconnected by means of a ______ without rotary motion
    Straight pull
  4. Oxygen cylinders and ______ shall be kept away from oil or Greece
  5. All arc welding and cutting cables shall be of the completely _______ flexible type
  6. cables in need of repair ______ be used
    Shall not
  7. All ground _______ shall be inspected to ensure that they are mechanically strong and electrically adequate for the required current
  8. The term _______ means the equipment or material included in a list published buy a nationally recognized testing laboratory
  9. Shall is used to indicate ______ which are mandatory
  10. Supervisors shall be responsible for the safe ________ of the welding equipment and for the safe ______ of the welding process
    Handling, use
  11. Welders shall cut or weld only where all _______ have been met
    Safety precautions
  12. Goggles shall be vented to deter _______ of the lenses
  13. Helmets hand- shield and goggles shall be well _______ and should not be transferred from one employee to another without being cleaned
  14. Cape sleaves or shoulder covers with bibs made of ________ or other_______ material shall be worn during overhead welding cutting or other operations when necessary
    Leather, flame resistant
  15. Caps made from_________ materials shall be worn under helmets when necessary to prevent head burns
    Flame resistant
  16. Only ________ respiratory protective equipment shall be used
  17. Adequate _______ shall be provided for all welding cutting brazing and related operations
  18. Before______ or_______ is begun in a location not designed for such purposes inspection and authorization by a designated management representative shall be required
    Welding, cutting
  19. Confined spaces shall be tested for toxic or flammable gases, dusts and vapors, and for________or_______oxygen before entering and during occupancy
    Adequate, excess
  20. When welding or cutting in confined spaces, gas cylinders in welding power sources shall be located ________the confined space
  21. When a person enters confined space through a manhole or other small opening, means shall be provided for __________ outside personnel for help
  22. Installation and operation of welding, cutting, and related equipment shall be done by, or under the supervision of a ________operator
  23. Cylinder valves shall be _______when equipment is unattended
  24. Hoses cables and conduit shall be ______ and ________ so that they will not be physically damaged
    Located, protected
  25. Oxy- fuel cutting is the process of _______ iron or steel into distinct pieces by using an oxy-fuel flame in combination with a jet of pure oxygen
  26. oxy-fuel gas cutting of ferrous metals is a process of _______ the material to be cut to its kindling or ignition temperature
  27. An oxyacetalene flame has a peak temperature of approximatly
    C. 6300 f
  28. List three types of oxyacetalene flames
    carburizing, neutral, oxidizing
  29. A _______ flame wich consumes approximatley half oxygen from cylender and half acetelene, is used mostly for welding steel.
  30. When more oxygen is supplied to the _____ flame, the inner cone becomes darker and shorter and the whole flame is smaller and hotter
  31. In most cases, cuts are started at the _____ of the piece.
  32. Never adjust an oxyacetelene flame by ______ the amount of acetelene
  33. Oxyacetelene welding is a ___________ process where coalesence is produced by heating with a gas flame.
  34. What are two types of work stations
    A. Portable type, B. Stationary type
  35. Oygen cylinders are supplied with speacially designed bronze valves which are always _____ open when the oxygen is being used
  36. a small drop of oil or greese inside an oxygen ____ or _____ can cause a explosion
    valve, regulator
  37. when Acetylene is continuosly withdrawn at a rate which exceeds 1/7th of the cylinders ____ volume (not its capacity), acetone comes out
  38. Acetylene is generated as the result of the chemical reaction of _______ and water
    Calcium carbide
  39. Recompressing high pressure oxygen in a ____ pressure cavity may create ____ resulting in combustion
    low, heat
  40. List the names of three sides of the fire triangle
    • A. Fuel
    • B.Oxygen
    • C.kindling Point
  41. all gas-air or gas oxygen _____ should be regarded as potentialy dangerous
  42. the odor of commercial ____ is very noticable and charistic, even in small percentages
  43. Propane is a _____ petroleum fuel, which comes from oil refineries or as gas off the top of oil wells.
  44. the oxyacetylene system is commonly used for ___ and ____ operations in piping installations
    cutting, welding
  45. goggles with _____ lenses should be individually fitted to secure best efficiancy and personal comfort
  46. what are two types of oxyacetelyne torches
    • a. The venturi proportioning or injector type
    • b. The pressure-porportioning type
  47. an injector type torch must be used with ____ fuel
  48. a _____ flame is produced by mixing a ratio of aprox. 1 volume of oxygen to 1 volume of acetylene
  49. a torch is essentialy a set of gas tubes with ______ valves
  50. What are the basic components of a torch?
    • a. control vlaves
    • b. the barrel and tubes
    • c. the torch head
  51. a welding tip or nozzle is normally an assembly consisting of a
    • A welding tip
    • B Cone and reducer
    • C coupling nut
  52. a cutting tip with six ______ orifcies will cut more readily in any direction
  53. a single state regulator functions by balancing the force of the _______ spring against the outlet pressure
  54. the adjusting screw of a regulator controls the ____ of the gas and _____ pressure to the hose and torch
    flow, delivery
  55. fuel gas regulators have ______ threaded outlet connections
  56. the pressure on a low-pressuer gage may require some means of ______ for fluctuation in pressure whe it is used with a long hose or a high rate of flow
  57. a premium quality welding hose, ______ is recomended for applications with all fuel gases including acetylene
    Grade T
  58. a ______ is the momentary recession of the flame into the torch tip followed by immediate reapperance of complete extiguishment of the flame
  59. a _____ is the recession of the flame into or back of the mixing chamber of the torch
  60. The reverse flow check valce principle employs a tiny spring mechanism which _____ a small ball or seat to provide a tight seal
  61. Reverse folow check valves and internal check valves are _____ devices that can leak when dirty or damaged
  62. diameter and length of flashback arrestors are _____ to the volume of gas passing through them
  63. Flashback arrestors eliminate the risk of an explosion in the ____ and cylenders
  64. a _____ journeyworker is one who knows not only the technical aspects of the piping trades but also the saftey precautions
  65. an approved filter lens, at least number ____ shade or darker, is required for eye protection when operating oxy-fuel equipment
  66. all welding and cutting equipment must be kept clean and absolutly free of greese, oil and other _____ based substances
  67. Reverse flow check valves should be tested every ___ months at a minumum
  68. regulators must be used only with the ____ and ____ for which the are designed
    gasses, pressure
  69. the oxygen torch connection is usually identified by a _____ in the torch body or in the torch handle, oppisite the oxygen valve
  70. reverse flow caused by ______ pressures results in mixed gases in hoses or regulators
    un equal
  71. do not activate an oxyacetelene system with the regulators pressure _____ screw turned in
  72. Before lighting the torch, ____ of the system is necessart to reduce the possibility of a mixed gas condition in the system
  73. check oxyacetylene equipment for leaks using an _____ oil free leak detection fluid
  74. Using less than required volume of acetylene gas for welding my result in _____ of tip or equipment and can lead to an internal fire or flashback
  75. always match the ____ size to the metal to be cut or welded
  76. If the flame goes out and burns back within a torch, which usually produces a pronounced hissing or squealing noise, immediatly ____ the torch
    shut off
  77. How many adjustments are on a combination oxyacetylene cutting or welding torch
    there are 4 adjustments- 2 located on the torch body and 2 located on the cutting assembly
  78. List the proper order of the 2 steps for exstinguishing the torch flame after cutting or welding
    A Turn the oxygen preheat valve to the closed position

    B turn the gas torch clave to the closed position
  79. Protective clothing must allow _______ while providing adequate coverage against burns from sparks, weld splatter and arc radiation.
    Freedom of movement
  80. Heavy _______ gloves should always be worn to protect your hands for burns cuts and scratches
    Flame resistant
  81. It is essential that your eyes are protected from ________ exposure
  82. You should choose a shaded _______ to dark to see the weld, then move to lighter shades without dropping below the minimum rating
    Filter lens
  83. What are two good reasons to wear ear muffs or plugs
    To keep flying sparks or metal out of your ears

    To prevent hearing loss as a result of working next to heavy equipment
  84. Before starting any arc welding operation, you should make a
    Complete inspection of the equipment
  85. Cylinders must be secured in an _______ position
  86. Open the cylinder valve only when standing to one side of the_______, away from welding or other sources of ignition
  87. The ______ of electric shock is one of the most serious and immediate risk facing you as a welding operator
  88. The _______ v shock is very hazardous because it is much greater than the welder secondary v
  89. A ________ V shock occurs when you touch a part of the electrode circuit
  90. A stick electrode is always ______ when the welder is on
    Electrically hot
  91. The fume _______ contains solid particles from the consumables, base metal and base metal coating
  92. Cadmium fume can be _____ even under brief exposure
  93. The _______ that result from an arc welding process also present potential hazards
  94. there's one easy way to reduce the risk of hazardous fumes and gases, keep your head out of the ________
    Fume plume
  95. When arc welding in a confined area there is danger is that enough _______ may be present in the confined space to cause an explosion
    flammable gases
  96. Always be sure the _______ cable makes a good electrical connection with the metal being welded
  97. When working above floor level use a______ to protect yourself from a fall should you get a shock
    Safety belt
  98. Arc welding is a method of ________two pieces of metal into one solid piece
  99. The electric arc is made between the _______ and the tip end of a small metal wire, the electrode
  100. A gap is made in the welding _______by holding the tip of the electrode a distance of 1/16 to 1/8 away from the work
  101. an electric arc is very ______ as well as ______ and cannot be looked at with the naked eye

  102. A slap forms on _______ of a weld to protect it during cooling
  103. An electrode is composed of a core of _______ metal wire around which has a baked on chemical
  104. List five types of welding
    • A motor generators
    • B engine driven generators
    • C transformers
    • D rectifiers
    • E combination transformer and rectifier
  105. Welding machines are rated according to their ___________, V, and duty cycle and are available in a wide range of sizes
    Current output
  106. Transformer welders are available for operation on __________ Power lines
  107. Rectifier set are basically _______ or ________ transformers to which have been added silicon or other rectifiers to change the output current from alternating to direct current
    Three phase, single phase
  108. Direct current generators use an ______ rotating in a electrical field
  109. Inverter power welding sources provide high electrical _______ and a fast response time
  110. Engine driven welding machines provide _______electrical current
  111. Welding current is conducted from the source of power to the electrode holder by an insulated _________ cable
  112. The size of cables used in welding varies, depending upon the_______of the machine and the ________ of cable required
    Capacity, length
  113. A work clamp fastened to the work ________ the welding circu8
  114. The electrode universally used for manual arc welding has a core of wire or rod covered with a baked ________ covering
  115. When selecting an electrode, it is necessary to use one
    • A that is made for welding with the type of current (ac or dc) being used
    • B for the particular base metal being welded
    • C for the purpose to which the finished job is intended
  116. The chemical covering on the outside of an electrode is called a _______, because it had a mixing and cleansing effect on the weld
  117. Classifications of ____ and ______ electrodes are based on a E prefix and a four or five digit nu5
    Mild, low alloy steel
  118. The first two digits of four digit number and the first three digits of five digit numbers indicate ________ tensile strength
  119. The next to last digit indicates the _______ of the weld
  120. All low hydrogen and stainless electrode must be _______ to perform properly
  121. A relatively ________ amount of moisture in low hydrogen and stainless electrodes cause visible external porosity in addition to internal porosity
  122. Electrodes to be re dried should be removed from the can and spread out in the furnace because
    • A each electrode must reach the drying temperature
    • B the cardboard can liners char at about 350 degrees damaging adjacent electrodes
  123. What are 2 types of pipe alignment clamps
    • A adjustable chain type
    • B all position hydraulic type
  124. A method of holding a pipe ______ while preparing for a fit up can be accomplished by using a hold down clamp
  125. List four components parts of a hold down
    Chain, bracket, hook, fine adjustment mechanism
  126. When it is impossible to make a visual check on a fit up a _______ gage is used
  127. Jack bars are located on the hold down clamp chain
  128. The method of checking Hi-lo on a small fitting is done with a measuring device
  129. Jackscrews are located on jackbars
  130. A spacing tool is used to obtain proper spacing on each joint for welding bracket with pointed screwst
  131. A retainer pin is located on the main block and is used to stop the chain clamp from kicking up
  132. A hold Down clamp is used to draw the slack out of the chain while on pipe for final tightness