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1. The temperature of the inner cone being considered the hottest spot in flame for oxy-acytelene is about __________.


2. If the alloys are mostly thick floating in consistency and the joint preparation is like in welding, this methods is termed __________.


3. If the alloys are thin flowing in consistency and they are ideal for use in capillary joints, this methods is termed as __________.


4. Manual Metal Arc Welding (MMAW) is commonly called __________.


5. To melt the edges of the joint forming a melt pool on the work piece, and to melt the tip of the coated electrode and the electrode is consumed and acts as a filler material mixing with the melted base material to fill up the joint, is the principle of __________.


6. When the stream of negatively charged electrons is flowing through the cable of welding machine and moving from the negative pole to the positive pole, basically this type of current used is __________.


7. When the power supply of a welding machine switches positive and negative polarity at a frequency which normally 50 or 60 times per seconds and the electrons will then no longer flow in a steady but flow back and forth in the cable, and 100 or 120 times a second the current will actually be zero, basically this type of current used is __________.


8. Tungsten Inert Gas (TIG) welding is a process that is primarily used for high quality metals such as stainless steel, Cunifer and Yor Albro, TIG welding is also called __________.


9. An inert gas used as shielding gas for TIG welding primarily to protect the molten pool against contaminants in the atmosphere is called __________.


10. A colorless and odorless gas, slightly heavier than air, non-toxic and non-combustible, proven to be the most suitable gas for TIG and MIG welding is known as a/an __________.


11. The method used for wire welding that uses a solid wire, depending on shielding gas, its process is divided into two, (MIG) metal inert gas and (MAG) metal active gas welding, this wire welding method is known as __________.


12. It uses a reactive gas like carbon dioxide to shield the pool as carbon dioxide is suitable for arc shielding when welding low carbon and low alloy steel, this process of wire welding is known as __________.


13. It uses inert gases like argon, pure inert gas shielding is essential for welding alloys of aluminium, magnesium, copper, titanium, stainless steel, nickel alloys and highly alloyed steel, this process of wire welding is known as __________.


14. In wire welding process, gas mixtures of inert gas and reactive gases (Argon + CO2) are regarded as __________.


15. Spray arc or short circuit arc is the methods and process of metal transfer with the __________.


16. The method used for wire welding where heat is obtained from an arc between a continuous flux cored wire and the work and the flux provides gas shielding for the arc and a slag covering of the weld deposit, this self-shielded flux cored arc welding process is known as __________.


17. The method used on wire welding where metal transfer is in the form of a continuous spray of molten metal droplets from the wire tip through the arc to the surface of the melted pool, this wire welding process is known as __________.


18. The method used on wire welding where no metal is transferred through the arc with this technique but is instead transferred through rapid short circuits between wire and work piece, as the wire touches the work piece and the welding current increases immediately, filler material melt and drop, this wire welding process is known as __________.


19. Gases used as shielding gas in MIG/MAG welding process is known as __________.


20. The removal of internal stresses in metal by heating and slow cooling is called __________.


21. A quickly detachable connectors for repeating cable connections is called __________.


22. The size of copper tubing is measured by its ___________.


23. The purpose of a doubler plate or striker is to __________.


24. The acetylene pressure regulator should never be adjusted to maintain a pressure more than 15 psig (103.4 kPa) for one reason that __________.


25. The purpose and objective of annealing any metal is to make the metal __________.


26. The threads of a pipe were cut with a taper to __________.


27. If the ballast tank manhole cover gasket and studs broke and were replaced, which of the following methods is satisfactory for testing after repair was made?


28. The tools which are best suited to cut pipeline flange gaskets to a correct size is __________.


29. The proper tools used for cutting external pipe thread is known as/a __________.


30. A hand tools known as taps and dies used for threading pipes is/are __________.


31. Copper metal used as a gasket is usually annealed by heating it to a cherry red color and __________.


32. The file that produces the finest surface on a work piece being finished filed in a lathe is called a/an __________.


33. A proper file used for a finishing cut on a soft metal like brass is called __________.


34. If a metal file has become clogged with filings, they should be cleaned with a __________.


35. The distance between corresponding points on adjacent threads is known as __________.


36. When cutting with hacksaw blade, the proper hacksaw cutting is accomplished when a pressure is applied only on the __________.


37. Before making a bore on a blind tapered hole, you should __________.


38. Cutting an angle iron and heavy pipe with a hand hacksaw, the appropriate number of teeth per inch of the hacksaw blade to be used is __________.


39. The best hand tool to cut copper coil tubing is __________.


40. When replacing a blade on a hand hacksaw frame, the proper way to install the blade is __________.


41. The diamond point chisels are effective for cutting __________.


42. Which of the following determine the nominal size of a pipe?


43. A materials which retain a large part of magnetization after the magnetizing force is removed, are said to have __________.


44. Which statement is correct concerning copper wire sized by AWG number?


45. The material used in the commutators of DC machinery which is harder than copper is __________.


46. Orderliness and cleanliness is a precautionary to safety, order may be maintained by _____________________.


47. When working on deck it is a good safety practice to avoid standing in a “bight” of a rope because __________.


48. Welding electrodes are divided into smoke classes which indicate the degree of smoke pollution and they are __________.


49. Cadmium plating is sometimes used instead of zinc plating. In welding or cutting cadmium plated material it can produce fumes which contain/s ________________.


50. Welding stainless or acid resistant steel produces smoke containing __________.


51. When combustion of the gasses is incomplete or if the material being welded or cut is plastic surface, varnished, painted or oily, it may give off __________.


52. Which of the following metals is not considered as an alloying element?


53. The following metals are considered alloy elements, except ___________.


54. The simplest methods of distinguishing cast iron from cast steel is to use hammer and chisel on a place of the casting where a little chiseling will do no harm, Cast steel when chiseled will __________.


55. The simplest methods of distinguishing cast iron from cast steel is to use hammer and chisel on a place of the casting where a little chiseling will do no harm. Cast iron when chiseled will __________.


56. The best methods of joining copper piping is _________________.


57. Copper sea water piping onboard ship has increasingly been replaced by Yorcalbro and Yorcalbro is __________.


58. Cunifer 10 and Cunifer 30 are supplementary alloys to Yorcalbro, “Cunifer” is __________.


59. Alloy of copper and nickel with resistant to sea water is ________________.


60. Steel is classified in _______________________.


61. Low alloy steel containing 1-5 percent alloy elements is classified in three grades as __________.


62. High alloy steel containing more than 5 percent alloy element is classified in three grades as __________.


63. Unalloyed steel containing up to 1 percent alloy elements and is also termed mild steel, carbon steel and carbon manganese steel is classified in three grades as __________.


64. Iron is the main component in most type of __________.


65. Generally classified as an alloy of Ferrum (Fe), better known as iron and carbon is known as __________.


66. Often referred to as carbon steel, mild steel or black steel is known as __________.


67. What type of steel usually found in the superstructure of a ship?


68. Angle iron, flat iron and rod iron are usually ________________.


69. Construction steel, ship quality steel or high tensile steel, heat resistant steel, low temperature steel, weather steel and tool steel are considered __________.


70. A steel used in hull plates, frames, deck plates, deck beams and bulkhead is known as __________.


71. A steel that can be exposed to the weather without being painted is known as __________.


72. A steel containing nickel is today used more and more in processing equipment on-board ships carrying low temperature cargo is known as __________.


73. A low alloy steel, alloyed with a certain percentage of molybdenum and sometimes also chromium found in boiler tubes, boiler plates and high pressure pipes is known as __________.


74. A steel belongs to the high alloy steel group is known as __________.


75. The element that makes stainless steel or corrosion resistant is called __________.


76. Stainless steel alloy with molybdenum is referred to as __________.


77. Which of the following has the highest corrosion resistance of all the stainless steel?


78. The maximum temperature at which a specimen in a special test solution shows no signs of pitting corrosion is called :


79. A kind of corrosion which occurs in narrow crevices filled with a liquid and where the oxygen level is very low e.g. on gasket surfaces, lap joint and under bolt and rivet heads is called __________.


80. Corrosion attack on a metal subjected to a tensile stress and exposed to a corrosive environment are called __________.


81. An iron that is essentially an alloy of ferrum (iron), carbon and silicon is known as __________.


82. Which of the following does not belong to the common type of cast iron?


83. The least expensive and most commonly used of all cast metals is called __________.


84. A type of cast iron which are useful for wear resistant service but due to their crack sensitivity they are very difficult to weld and may be considered unweldable is __________.


85. A type of cast iron that starts its life as an ordinary white cast iron, very hard and brittle and when annealed at temperature above 870 ºC at which point the silicon can break down the iron carbides into iron and carbon and in 1 to 6 days its properties are opposite to those of white iron is called __________.


86. An iron also know as nodular graphite, spheroidal graphite, and SG is a __________.


87. A general classification that applies to gray iron, white iron, and ductile iron is called __________.


88. In order to identify cast steel from cast iron, cast steel when chiseled will form a __________.


89. In order to identify cast iron from cast steel, cast iron when chiseled will forms __________.


90. A cracks that appear during or just after the cooling off period cause by impurities in the base material which have a tendency to segregate and may form a layer in the middle of the weld is called __________.


91. A cracks usually appears across the weld direction and be caused by considerable lengthwise shrinkage is called __________.


92. If the water in the coating will change into hydrogen in the arc and end up as hydrogen porosity dissolved in the weld metal and the heat affected zone (HAZ) immediately adjacent to the molten zone, this cracks is known as __________.


93. Which of the following does not belong to inspector’s tools for the evaluation of welds?


94. The maximum exposure time for electrodes in an open that needs re-drying before being returned to the heating cabinet preferably in a dehumidified area or with heating temperature of 80 ºC is __________.


95. TIG welding is an abbreviation of __________.


96. In order to identify aluminium from magnesium prior to welding, file a few shaving in a small piece of paper and hold the paper over a flame, if the filling spark or seem to explode in the flame, the material is __________.


97. In order to determine aluminium from magnesium prior to welding, file a few shaving in a small piece of paper and hold the paper over a flame, if there are only a few sparks here and there, and most of the filling just glow, the material is __________.


98. When the inner cone of the flame has a bright blue light and extended only a short distance from the tip and around the inner cone is the flame envelope which is darker and less intensely blue, this flame is called __________.


99. An excess of acetylene and is recognized by a secondary flame zone between the inner cone and the flame envelope, this flame is called __________.


100. The flame is shorter and sharper than the neutral flame , with a shorter, more pointed inner cone and is slightly hotter than the neutral flame, used for welding cast iron, brass, bronze and zinc alloys and for brazing is called __________.


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