Engineering, Materials And Components Quiz

229 Questions

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Engineering Quizzes & Trivia

Test questions for Materials and Processes exams. Very helpful for studying for CGSB exams.


Questions and Answers
  • 1. 
    As hot working progresses, the energy required for further processing (assuming the temperature of the part is held constant):
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Remains constant

    • D. 

      Any one of the above may be true, depending on material.

  • 2. 
    A fatigue crack is a service defect that is caused by a:
    • A. 

      Cyclic loading of the part above the yield strength of the material.

    • B. 

      Cyclic loading of the part below the yield strength of the material.

    • C. 

      Local overheating of the part.

    • D. 

      Corrosive atmosphere

  • 3. 
    The middle portion of a molding flask is called a:
    • A. 

      Cope

    • B. 

      Drag

    • C. 

      Cheek

    • D. 

      Separator

  • 4. 
    A cause of gas porosity in welds is:
    • A. 

      Welding at too low of a temperature

    • B. 

      Improper cleaning or preheating

    • C. 

      The use of insufficient filler material

    • D. 

      Restriction of movement of the material

  • 5. 
    In the resistance welding process:
    • A. 

      Two parts to be joined are heated then pressure is applied.

    • B. 

      The pieces to be joined are held firmly together under pressure, followed by the generation of heat at the interface.

    • C. 

      No heat is applied and the parts are welded by applying pressure only.

    • D. 

      The parts are heated but not melted and a filler metal is added.

  • 6. 
    In a mold, the runner connects:
    • A. 

      The pouring basin to the sprue

    • B. 

      The downgate to the riser

    • C. 

      The sprue to the ingate

    • D. 

      The pouring basin to the mold cavity

  • 7. 
    Metal forming such as rolling, results in:
    • A. 

      Plastic flow of the metal

    • B. 

      Elongation of existing defects perpendicular to the rolling direction

    • C. 

      Directional properties which is always beneficial for secondary forming operations.

    • D. 

      The flattening out of defects which makes them more easily detectable by most NDT methods

  • 8. 
    A welding defect that occurs at the root and runs parallel with the weld is:
    • A. 

      Lack of fusion between beads

    • B. 

      Icicle

    • C. 

      A crater crack

    • D. 

      Lack of penetration

  • 9. 
    Hot working an ingot may produce a product which has:
    • A. 

      Fewer defects than in the original ingot

    • B. 

      More defects than the original ingot

    • C. 

      The same number of defects as in the original ingot

    • D. 

      Any of the above may be correct depending on the circumstances.

  • 10. 
    A disadvantage of dry sand molds when compared to green sand molds is:
    • A. 

      Erosion of the mold is more common

    • B. 

      Castings are more susceptible to hot tears

    • C. 

      A surface finish is generally worse.

    • D. 

      Overall dimensional accuracy is worse

  • 11. 
    A long defect, parallel to the longitudinal axis of a bar and caused by blowholes, cracks or tears introduced in earlier processing and elongated in the direction of rolling or forging is called:
    • A. 

      A seam

    • B. 

      A forging lap

    • C. 

      A lamination

    • D. 

      A cold shut

  • 12. 
    Rapid oxidation of metal surfaces during hot working of a mild steel may;
    • A. 

      Produce a carburized surface layer

    • B. 

      Produce a product which is thicker then originally intended

    • C. 

      Adversely affect the cooling rate of the newly formed material

    • D. 

      Adversely affect the application of some non-destructive test

  • 13. 
    An advantage of shell molding over green sand molding is:
    • A. 

      Larger castings can be produced using shell molds

    • B. 

      Lower cost of production of shell molding

    • C. 

      Better surface finish is obtainable

    • D. 

      All of the above

  • 14. 
    A burst is _____________ discontinuity.
    • A. 

      An inherent

    • B. 

      A processing

    • C. 

      A service

    • D. 

      All of the above

  • 15. 
    Bursts usually have the following characteristics:
    • A. 

      Appear as smooth indentations on metal surfaces

    • B. 

      Are cavities varying in size from wide open to very tight, usually parallel with the grain

    • C. 

      Are extremely thin and flat, generally aligned parallel to the work surface of the material

    • D. 

      Are three dimensional discontinuities having smooth internal surfaces and generally located close to the surface of the wrought material

  • 16. 
    In a rolling mill, flattening and elongation of metal is accomplished by:
    • A. 

      Tensile stresses

    • B. 

      Bending stresses

    • C. 

      Primarily compressive stresses

    • D. 

      High frequency cyclical loads

  • 17. 
    The fuel gas most commonly used in gas welding is:
    • A. 

      Butane

    • B. 

      Propane

    • C. 

      Acetylene

    • D. 

      All of the above

  • 18. 
    Cold shuts are most likely to be found in:
    • A. 

      Extrusions

    • B. 

      Forgings

    • C. 

      Castings

    • D. 

      Sintered parts

  • 19. 
    Aircraft turbine blades are usually processed by:
    • A. 

      Investment casting

    • B. 

      Shell mold casting

    • C. 

      Green sand casting

    • D. 

      Dry sand casting

  • 20. 
    The electrodes used for spot welding are usually made of:
    • A. 

      Carbon

    • B. 

      Mild Steel

    • C. 

      Tungsten

    • D. 

      Copper

  • 21. 
    A metal forming operation which allows three dimensional control over the shape of the product is:
    • A. 

      Rolling

    • B. 

      Extruding

    • C. 

      Forging

    • D. 

      All of the above

  • 22. 
    A forming operation which results in the greatest dimensional accuracy is:
    • A. 

      Cold rolling of sheet

    • B. 

      Hot rolling of sheet

    • C. 

      Cold rolling of bars

    • D. 

      Forging

  • 23. 
    In which of the following joining methods will flaws, when they do occur, be essentially two dimensional?
    • A. 

      Gas tungsten arc welding

    • B. 

      Gas metal arc welding

    • C. 

      Submerged arc welding

    • D. 

      Brazing

  • 24. 
    A flaw which can resemble a cold shut is:
    • A. 

      An undercut in the weld

    • B. 

      A hot tear in a casting

    • C. 

      A blowhole in a casting

    • D. 

      A forging lap

  • 25. 
    Elements may be added to the filler metal to:
    • A. 

      Control gain growth

    • B. 

      Increase ductility

    • C. 

      Assure adequate corrosion resistance

    • D. 

      Any of the above

  • 26. 
    One of the main causes of cold shuts is:
    • A. 

      Improper preheating of molds

    • B. 

      The presence of several sprues or gates in the mold

    • C. 

      Pouring without a filter

    • D. 

      The alloy selection

  • 27. 
    An EDM notch formed in 304 stainless steel may cause:
    • A. 

      A local increase in permeability

    • B. 

      The formation of austenite around the notch

    • C. 

      An increase in conductivity

    • D. 

      All of the above

  • 28. 
    Which discontinuity is not normally found in a casting?
    • A. 

      Misrun

    • B. 

      Porosity

    • C. 

      Shrinkage

    • D. 

      Slugging

  • 29. 
    Non-metallic impurities trapped within the molten metal of a casting are generally called:
    • A. 

      Blowholes

    • B. 

      Inclusions

    • C. 

      Cracks

    • D. 

      Shrink cavities

  • 30. 
    Most manufacturing defects in a tube are:
    • A. 

      Axial in direction

    • B. 

      Circumferential in direction

    • C. 

      On the outside of the tube

    • D. 

      Subsurface

  • 31. 
    Increasing test sample temperature normally:
    • A. 

      Increases electrical resistivity

    • B. 

      Decreases electrical resistivity

    • C. 

      Does not change electrical resistivity

    • D. 

      Increases magnetic permeability

  • 32. 
    • A. 

      Porosity

    • B. 

      Inclusions

    • C. 

      Shrinkage

    • D. 

      Core shift

  • 33. 
    Heat exchanger tubes are defect prone at regions:
    • A. 

      Adjacent to support plates

    • B. 

      Under support plates

    • C. 

      In-between support plates

    • D. 

      All of the above

  • 34. 
    Which of the following discontinuities is not normally associated with a casting?
    • A. 

      Segregation

    • B. 

      Core shift

    • C. 

      Misrun

    • D. 

      Bursts

  • 35. 
    Which of the following is identified as a casting insert?
    • A. 

      Chaplet

    • B. 

      Mold

    • C. 

      Gate

    • D. 

      Riser

  • 36. 
    The work metal for working with a forging hammer is:
    • A. 

      A bloom

    • B. 

      A billet

    • C. 

      A bar

    • D. 

      Any of the above

  • 37. 
    Cold working steel or aluminum results in a decrease in:
    • A. 

      Ductility

    • B. 

      Hardness

    • C. 

      Strength

    • D. 

      All of the above

  • 38. 
    The grain size of ferrous metal is commonly refined by:
    • A. 

      Elastic deformation

    • B. 

      Heat treatment

    • C. 

      High frequency mechanical vibrations

    • D. 

      Both A and B

  • 39. 
    A method commonly used to remove a number of flaws in an ingot prior to forming is:
    • A. 

      Cropping

    • B. 

      Heat treating

    • C. 

      Welding

    • D. 

      Sand blasting

  • 40. 
    Which of the following factors can have a negative influence on some non-destructive tests?
    • A. 

      Grain size

    • B. 

      Grain orientation

    • C. 

      Grain boundary composition

    • D. 

      All of the above

  • 41. 
    The principal purpose of risers in molds is to:
    • A. 

      Feed the castings

    • B. 

      Let air escape from the mold

    • C. 

      Ensure impurities will remain outside the casting

    • D. 

      Favor directional solidification

  • 42. 
    The process in which a mold is formed from a mixture of sand and a thermosetting resin binder that is placed against a heated metal pattern is called:
    • A. 

      Dry sand molding

    • B. 

      Permanent mold casting

    • C. 

      Investment casting

    • D. 

      Shell molding

  • 43. 
    A casting process in which the pattern is not re-usable is called:
    • A. 

      Shell mold casting

    • B. 

      Investment casting

    • C. 

      Sand casting

    • D. 

      Composite mold casting

  • 44. 
    A casting process involving a re-usable mold is called:
    • A. 

      Investment casting

    • B. 

      Shell mold casting

    • C. 

      Dry sand casting

    • D. 

      Die casting

  • 45. 
    Which of the following welding processes does not involve melting of the parts to be joined?
    • A. 

      Arc welding

    • B. 

      Gas welding

    • C. 

      Pressure welding

    • D. 

      Electron beam welding

  • 46. 
    In the shielded metal-arc process, the electrode covering may include materials used to:
    • A. 

      Protect the metal from oxidation during melting and transfer across the arc.

    • B. 

      Protect the weld bead as it solidifies and cools to room temperature

    • C. 

      Alloy the weld metal

    • D. 

      All of the above

  • 47. 
    A non-consumable electrode used for arc welding would be made of:
    • A. 

      Tungsten

    • B. 

      Steel

    • C. 

      Copper

    • D. 

      Titanium

  • 48. 
    In gas welding, the acetylene is usually burned with:
    • A. 

      Oxygen

    • B. 

      Hydrogen

    • C. 

      Argon

    • D. 

      Nitrogen

  • 49. 
    Which of the following statements is correct?
    • A. 

      The heat affected zone of a weld is basically a homogeneous structure

    • B. 

      In some areas of the weld heat affected zone, grain size can be smaller than in the unaffected base metal

    • C. 

      The temperature in the heat affected zone can sometimes exceed the temperature in the fusion zone

    • D. 

      Transverse cracks do not occur in the heat affected zone

  • 50. 
    A rupture in the material that can be in any direction on the part and is caused by localized stresses that exceed the tensile strength of the material is:
    • A. 

      A fatigue crack

    • B. 

      A heat treat crack

    • C. 

      A seam

    • D. 

      A stringer

  • 51. 
    The way of providing metal ductility between two cold working operations is:
    • A. 

      By heating up the metal below its recrystallization temperature

    • B. 

      By quenching the metal

    • C. 

      By heating up the metal above its recrystallization temperature

    • D. 

      By stress relieving the metal

  • 52. 
    The Curie point is:
    • A. 

      The temperature at which the steel structure changes from B.C.C. to F.C.C.

    • B. 

      The temperature above which the steel is no longer magnetic

    • C. 

      The temperature at which the metal must be heated between two cold working operations

    • D. 

      The melting point of the material

  • 53. 
    • A. 

      The cooling rate from the liquid to solid state

    • B. 

      The amount of cold working

    • C. 

      Heat treatment for allotropic materials

    • D. 

      Any of the above

  • 54. 
    Which of the following properties is controlled by the electrons in the atom?
    • A. 

      The electrical conductivity

    • B. 

      The density

    • C. 

      The tensile strength

    • D. 

      The ductility

  • 55. 
    The hardest structure that can be produced by heat treating steel is:
    • A. 

      Pearlite

    • B. 

      Austenite

    • C. 

      Cementite

    • D. 

      Martensite

  • 56. 
    The property of a material to exist under different lattice structures at different temperatures is:
    • A. 

      Ductility

    • B. 

      Allotropy

    • C. 

      Crystallinity

    • D. 

      Hardenability

  • 57. 
    • A. 

      Gases given off during casting and trapped in the metal

    • B. 

      Not enough metal available to fill the mold

    • C. 

      Too low of a temperature of the metal poured

    • D. 

      More rapid cooling of thin sections that adjoin heavier masses of metal which are slower to cool

  • 58. 
    An advantage of investment casting over green sand casting is:
    • A. 

      The mold is reusable

    • B. 

      Larger parts may be cast

    • C. 

      More complex shapes may be cast

    • D. 

      The need for cores never arises

  • 59. 
    The material used for making a pattern depends on:
    • A. 

      The type of material that will be cast

    • B. 

      The grain structure desired in the finished casting

    • C. 

      The expected production quantity

    • D. 

      All of the above

  • 60. 
    A green sand mold is:
    • A. 

      A sand mold coated with a "green" wash

    • B. 

      A sand mold mixture made up of sand, clay and water

    • C. 

      A sand mold not yet ready for casting

    • D. 

      A sand mold used in the production of cores only

  • 61. 
    In which of the following casting processes are cores never used?
    • A. 

      Shell and mold casting

    • B. 

      Investment casting

    • C. 

      Permanent mold casting

    • D. 

      None of the above

  • 62. 
    The essential difference between permanent mold casting and die casting is:
    • A. 

      In the first method, molten metal enters the mold by gravity, while in the second method, the molten metal enters the mold under pressure.

    • B. 

      The mold in the permanent mold casting is reusable while it is not in the case of the die casting.

    • C. 

      The mold in permanent mold casting is made of ceramic while steel is used to make the mold for die casting.

    • D. 

      There are no differences. Both names are used to identify the same process.

  • 63. 
    • A. 

      Atoms become more mobile thus allowing them to migrate to definite positions within a crystal

    • B. 

      Atoms lose mobility and assume fixed positions in the space lattice of the unit cell

    • C. 

      A curie point is reached where crystals begin to grow

    • D. 

      A curie point is reached where grain boundaries begin to form

  • 64. 
    After solidification, the structure of the outside surface of a casting usually consists of:
    • A. 

      A mixture of large and small grains having random orientation and shape

    • B. 

      Coarse columnar grains

    • C. 

      Coarse equiaxed grains

    • D. 

      Fine equiaxed grains having random orientation and shape

  • 65. 
    • A. 

      Fine equiaxed grains of a random orientation and shape

    • B. 

      Columnar grains with a dendritic structure

    • C. 

      Large equiaxed grains with superior metallurgical characteristics

    • D. 

      None of the above are correct

  • 66. 
    In fusion welding, preheating will result in:
    • A. 

      A reduced grain size

    • B. 

      A harder structure

    • C. 

      A reduced cooling rate

    • D. 

      An austenitization of the base metal prior to welding

  • 67. 
    Elements may be added to the filler metal to:
    • A. 

      Control grain growth

    • B. 

      Increases ductility

    • C. 

      Assure adequate corrosion resistance

    • D. 

      Any of the above

  • 68. 
    An advantage of electroslag welding over other methods of welding is that:
    • A. 

      A coarse grain structure is formed because of the slow cooling rate

    • B. 

      It does not require special edge preparation on the base metal sections

    • C. 

      Weld cracking is never a problem because of the absence of residual stress

    • D. 

      Very thin sections can be welded easily

  • 69. 
    A difference between shielded metal-arc welding and gas metal-arc welding is that, in gas metal-arc welding:
    • A. 

      The electrode is consumable

    • B. 

      The shielding gas is contained in the flux covering the electrode

    • C. 

      A stream of protective gas is passed through an inverted cup or a nozzle which surrounds the electrode

    • D. 

      A slag coating is formed to protect the weld as it cools

  • 70. 
    Submerged arc welding may be performed:
    • A. 

      In the flat position

    • B. 

      In the flat and horizontal positions

    • C. 

      In the vertical position

    • D. 

      All of the above

  • 71. 
    Arc welding is usually performed using:
    • A. 

      Alternating current, low voltage and low amperage

    • B. 

      Direct current, low voltage and high amperage

    • C. 

      Direct current, high voltage and low amperage

    • D. 

      Alternating current, high voltage and low amperage

  • 72. 
    Hot tears in a casting may be the result of:
    • A. 

      Interrupted or too slow metal pouring

    • B. 

      Excessive gas in the metal poured

    • C. 

      Insufficient metal poured

    • D. 

      Improper use of chills

  • 73. 
    Laminations are produced:
    • A. 

      When forging with faulty dies

    • B. 

      When excess metal is folded over during a rolling operation

    • C. 

      When a pipe or blisters present in the original ingot are made directional by rolling

    • D. 

      When blowholes introduced in earlier processing are elongated, by extruding, in the direction of working

  • 74. 
    A metal production process which eliminates the need for ingot cropping is:
    • A. 

      Continuous hot rolling

    • B. 

      Super hot rolling

    • C. 

      Super hot extrusion

    • D. 

      Continuous casting

  • 75. 
    Inserts which may be found in sand molds are:
    • A. 

      Chills

    • B. 

      Chaplets

    • C. 

      Cores

    • D. 

      All of the above

  • 76. 
    The first step in the production of a casting is the making of:
    • A. 

      A mold

    • B. 

      A pattern

    • C. 

      A core

    • D. 

      A cavity

  • 77. 
    A joining process which occurs without fusion of the base metal is:
    • A. 

      Arc welding

    • B. 

      Brazing

    • C. 

      Spot welding

    • D. 

      Gas welding

  • 78. 
    In which of the following welding processes is filler metal never added?
    • A. 

      Brazing

    • B. 

      Soldering

    • C. 

      Arc welding

    • D. 

      Spot welding

  • 79. 
    A type of defect which propagates along grain boundaries is called:
    • A. 

      A fatigue crack

    • B. 

      A transgranular crack

    • C. 

      A borderline crack

    • D. 

      A hot tear

  • 80. 
    • A. 

      Shrinkage cracks

    • B. 

      Laps

    • C. 

      Hot tears

    • D. 

      Insufficient penetration

  • 81. 
    A weld defect formed as a result of shrinkage is called:
    • A. 

      Undercutting

    • B. 

      Heat affected zone cracking

    • C. 

      A crater crack

    • D. 

      An incomplete sidewall fusion

  • 82. 
    A steel casting suitable for working or remelting is called:
    • A. 

      A bloom

    • B. 

      A billet

    • C. 

      An ingot

    • D. 

      A slab

  • 83. 
    With a forging hammer the striking force is imposed on the work metal by:
    • A. 

      The lower die only

    • B. 

      The upper die only

    • C. 

      Both dies moving in opposite directions

    • D. 

      Both B and C

  • 84. 
    The factor which must be considered prior to selecting the hammer or press to produce a closed-die forging is:
    • A. 

      The size of the forging

    • B. 

      The production quantity

    • C. 

      The design of the forging

    • D. 

      All of the above

  • 85. 
    Which of the following statements is correct?
    • A. 

      The hardness of the dies for open-die forging is generally higher than the hardness of impression dies for closed-die forging

    • B. 

      The hardness of dies for open-die forging is generally lower than the hardness of impression dies for closed-die forging

    • C. 

      The life of dies for open-die forging is less than that of impression dies for closed-die forging

    • D. 

      Both B and C are true

  • 86. 
    Prior to forging, steel is usually heated to:
    • A. 

      Slightly above the curie temperature

    • B. 

      Slightly above the melting temperature

    • C. 

      Slightly below the melting temperature

    • D. 

      Slightly below the first transformation temperature

  • 87. 
    The purpose of metal forming is to:
    • A. 

      Refine the grain structure

    • B. 

      Improve the mechanical properties

    • C. 

      Close blow holes which have formed in an ingot

    • D. 

      All of the above

  • 88. 
    Strain hardening occurs whenever a metal is:
    • A. 

      Deformed at a temperature below the recrystallization point

    • B. 

      Deformed at a temperature above the recrystallization point

    • C. 

      Heat treated

    • D. 

      Both a and c

  • 89. 
    Metals which cannot be work hardened are those which:
    • A. 

      Recrystallize at room temperature

    • B. 

      Recrystallize at very high temperatures

    • C. 

      Recrystallize at the curie temperature

    • D. 

      Recrystallize above the curie temperature

  • 90. 
    The material used for making a pattern depends on:
    • A. 

      The type of material that will be cast

    • B. 

      The grain structure desired in the finished casting

    • C. 

      The expected production quantity

    • D. 

      All of the above

  • 91. 
    Patterns made of wood:
    • A. 

      Are always made in one piece

    • B. 

      Are always made in two pieces, one for the cope and the other for the drag portion of the flask

    • C. 

      Are made in one, two, or more pieces depending on the complexity of the casting

    • D. 

      Never includes the gates and risers if they are made in one piece

  • 92. 
    The top portion of a molding flask is called a:
    • A. 

      Cope

    • B. 

      Drag

    • C. 

      Cheek

    • D. 

      Separator

  • 93. 
    The bottom portion of a molding flask is called a:
    • A. 

      Cope

    • B. 

      Drag

    • C. 

      Cheek

    • D. 

      Separator

  • 94. 
    In a mold, the sprue connects:
    • A. 

      The runner to the mold cavity

    • B. 

      The downgate to the riser

    • C. 

      The downgate to the ingate

    • D. 

      The pouring basin to the runner

  • 95. 
    A metal support for holding cores in place within a sand mold is called:
    • A. 

      A core

    • B. 

      A chill

    • C. 

      A chaplet

    • D. 

      A spacer

  • 96. 
    Which of the following methods produces a casting faster and at a lower cost?
    • A. 

      Green sand casting

    • B. 

      Dry sand casting

    • C. 

      Investment casting

    • D. 

      Shell casting

  • 97. 
    Resistance welding differs from fusion welding in that:
    • A. 

      The use of pressure is indispensable

    • B. 

      Smaller amounts of filler metal is used

    • C. 

      Bonding occurs at room temperature

    • D. 

      There is no fusion of the parent material

  • 98. 
    • A. 

      Protects the metal from picking-up nitrogen during melting and transfer across the arc

    • B. 

      Serves as alloying elements to the weld

    • C. 

      Protects the metal from oxidation during melting

    • D. 

      All of the above

  • 99. 
    In which of the following arc welding processes is the electrode non-consumable?
    • A. 

      Shielded metal-arc welding

    • B. 

      Gas tungsten-arc welding

    • C. 

      Gas metal-arc welding

    • D. 

      Submerged arc welding

  • 100. 
    The following gas is used intensively for shielding in the gas tungsten-arc welding process:
    • A. 

      Radon

    • B. 

      Oxygen

    • C. 

      Argon

    • D. 

      Hydrogen

  • 101. 
    In the submerged arc welding process:
    • A. 

      Flux is supplied by the electrode covering

    • B. 

      Flux is added separately and heaped along the joint to be welded

    • C. 

      A liquid flux is applied

    • D. 

      No flux is needed

  • 102. 
    A process in which multiple electrodes are most commonly used in various arrangements to deposit metal more rapidly is:
    • A. 

      Shielded metal-arc welding

    • B. 

      Gas tungsten-arc welding

    • C. 

      Gas metal-arc welding

    • D. 

      Submerged arc welding

  • 103. 
    In gas welding, a reducing flame is produced when:
    • A. 

      There is no excess oxygen or acetylene in the flame

    • B. 

      There is excess acetylene in the flame

    • C. 

      There is excess oxygen in the flame

    • D. 

      There is excess oxygen and acetylene in the flame

  • 104. 
    As cold working progresses, the energy required for further processing (assuming the temperature of the part is held constant):
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Remains constant

    • D. 

      Any one of the above may be true depending on the material

  • 105. 
    Lack of penetration may be the result of:
    • A. 

      Too slow a welding rate

    • B. 

      Too large a welding rod

    • C. 

      Too high a welding current

    • D. 

      Improper use of chills

  • 106. 
    A forging defect caused by the metal being folded over and forced into the surface but not welded to form a single piece is called:
    • A. 

      A hot tear

    • B. 

      A forging lap

    • C. 

      A burst

    • D. 

      A forging crack

  • 107. 
    Grinding cracks can be caused by:
    • A. 

      Lack of, or poor coolant

    • B. 

      Dull, or improper grinding wheel

    • C. 

      A too heavy cut

    • D. 

      All of the above

  • 108. 
    A crater crack may occur when:
    • A. 

      The welder fails to fill the crater before breaking the arc

    • B. 

      The root face of the joint does not reach fusion temperature before weld metal is deposited

    • C. 

      Cleaning or preheating of the plates is improperly done before welding

    • D. 

      Excessive current and excessive welding speed are used

  • 109. 
    A forging lap may occur if:
    • A. 

      Faulty dies are used for forging

    • B. 

      The metal is either too hot or too cold during the forging operation

    • C. 

      The metal is forced to flow too fast

    • D. 

      All of the above.

  • 110. 
    Heat treat cracks may be caused by:
    • A. 

      Unequal heating or cooling of the material

    • B. 

      Localized stresses below the tensile strength of the material

    • C. 

      Too high a heat-treatment temperature

    • D. 

      Use of the part at high temperature

  • 111. 
    A service defect that appears as a series of small micro-openings with no definite pattern and extend in any direction following the grain boundaries is:
    • A. 

      A fatigue crack

    • B. 

      A fillet crack

    • C. 

      Hydrogen embrittlement

    • D. 

      Intergranular corrosion

  • 112. 
    Fine lines, likely to occur in groups caused by non-metallic impurities present in the original ingot and extruded lengthwise are called:
    • A. 

      Stringers

    • B. 

      Seams

    • C. 

      Laminations

    • D. 

      Laps

  • 113. 
    A burst is a processing defect that may be caused by:
    • A. 

      The dies not being set-up properly in the hammer or press

    • B. 

      Excessive working of the metal during the forging or extruding operation

    • C. 

      Localized stresses set up by unequal heavier masses of metal

    • D. 

      Thin sections adjoining heavier masses of metal

  • 114. 
    A generally smooth indication on a cast surface resulting from the meeting of two streams of metal coming from different directions and failing to fuse is called:
    • A. 

      A stringer

    • B. 

      A hot tear

    • C. 

      A cold shut

    • D. 

      A lap

  • 115. 
    Spot welding is usually performed using:
    • A. 

      A very low current passed for a very short time

    • B. 

      A very high current passed for a very short time

    • C. 

      A very low current passed for a very long time

    • D. 

      A very high current passed for a very long time

  • 116. 
    Materials of low ductility are best forged with:
    • A. 

      Gravity drop hammers

    • B. 

      Power drop hammers

    • C. 

      High energy rate forging hammers

    • D. 

      Hydraulic presses

  • 117. 
    The following defect is caused by the melting away of the sidewalls of the welding groove at the edge of a layer of weld metal and runs parallel to the weld bead:
    • A. 

      Lack of penetration

    • B. 

      Lack of fusion

    • C. 

      Undercutting

    • D. 

      Surface shrink crack

  • 118. 
    A large semi-finished hot rolled product, approximately square in cross section, and whose cross-sectional area is usually not less than 36 sq. inches is called:
    • A. 

      A bloom

    • B. 

      A billet

    • C. 

      An ingot

    • D. 

      A slab

  • 119. 
    Forming a taper, or a reduction of metal products such as rod and tubing, by forging is called:
    • A. 

      Swaging

    • B. 

      Upsetting

    • C. 

      Punching

    • D. 

      Drawing

  • 120. 
    Possible effect(s) of metal forming is (are) to:
    • A. 

      Refine the grain structure

    • B. 

      Improve the mechanical properties

    • C. 

      Close blow holes which have formed in an ingot

    • D. 

      All of the above

  • 121. 
    In gas welding, a reducing flame is produced when:
    • A. 

      There is no excess oxygen or acetylene in the flame

    • B. 

      There is excess acetylene in the flame

    • C. 

      There is excess oxygen in the flame

    • D. 

      There is excess oxygen and acetylene in the flame

  • 122. 
    Cold shuts are most likely found in:
    • A. 

      Extrusions

    • B. 

      Forgings

    • C. 

      Castings

    • D. 

      Sintered parts

  • 123. 
    Which of the following can be classified as processing defects:
    • A. 

      Laminations

    • B. 

      Grinding cracks

    • C. 

      Fatigue cracks

    • D. 

      Cold shuts

  • 124. 
    Grinding cracks are usually caused by:
    • A. 

      Heat treatment

    • B. 

      Grinding soft metal surfaces

    • C. 

      Grinding hard metal surfaces

    • D. 

      Too slow feeding rates

  • 125. 
    A cause of gas porosity in welds is:
    • A. 

      Welding at too low a temperature

    • B. 

      Improper cleaning or preheating of the plates to be welded

    • C. 

      The use of insufficient filler metal

    • D. 

      Restriction of movement of the metal during heating or welding

  • 126. 
    Which of the following generally requires the most extensive technique development for NDT?
    • A. 

      A rolled product

    • B. 

      A forged product

    • C. 

      An extruded product

    • D. 

      All of the above usually require about the same degree of NDT technique development prior to inspection

  • 127. 
    A common characteristic of sand casting and investment casting is:
    • A. 

      Both may be used to produce small castings

    • B. 

      Both produce castings of great dimensional accuracy

    • C. 

      Both make use of wooden patterns

    • D. 

      Both make use of re-usable molds

  • 128. 
    Usually, seamless tubing is produced by:
    • A. 

      Extrusion

    • B. 

      A welding process which requires filler metal

    • C. 

      Resistance welding

    • D. 

      Seamless welding

  • 129. 
    Patterns used to prepare molds for casting are made of:
    • A. 

      Wood

    • B. 

      Aluminum alloy

    • C. 

      Epoxy resin

    • D. 

      Any of the above

  • 130. 
    Bursts are caused by:
    • A. 

      Working at too low or too high a temperature

    • B. 

      Excessive grinding

    • C. 

      The presence of hydrogen in the metal

    • D. 

      Localized heat-affected zones

  • 131. 
    • A. 

      Improper preheating of molds

    • B. 

      The presence of several sprues or gates in the mold

    • C. 

      Pouring without a filter

    • D. 

      The alloy selection

  • 132. 
    The reason an ingot used as forging stock is subjected to more than the minimum hot working required to develop contour is to:
    • A. 

      Remove evidence of cast structure

    • B. 

      Refine grain structure

    • C. 

      Impose a more desirable grain direction

    • D. 

      All of the above

  • 133. 
    Wrought products invariably exhibit:
    • A. 

      High susceptibility to corrosion

    • B. 

      Lower strength than their cast counterparts

    • C. 

      Directional properties

    • D. 

      Poor weldability

  • 134. 
    A metal insert imbedded in the surface of a sand mold to increase the cooling rate at the point is called:
    • A. 

      A chill

    • B. 

      A heat sink

    • C. 

      A chaplet

    • D. 

      A core

  • 135. 
    A riser in the mold is there to:
    • A. 

      Feed the castings as the metal shrinks before and during solidification

    • B. 

      Let air escape from the mold

    • C. 

      Ensure that impurities will segregate outside of the casting proper

    • D. 

      All of the above

  • 136. 
    In spot resistance welding, pressure used may be:
    • A. 

      Mechanical

    • B. 

      Pneumatic

    • C. 

      Hydraulic

    • D. 

      Any of the above

  • 137. 
    Usually, the most serious type of flaw in metals is/are:
    • A. 

      Porosity

    • B. 

      Cracks

    • C. 

      Inclusions

    • D. 

      Laminations

  • 138. 
    Pressure welding can be accomplished with pressure alone, but what else is usually added?
    • A. 

      Heat

    • B. 

      Filler material

    • C. 

      Oxides

    • D. 

      Adhesives

  • 139. 
    The acronym EDM refers to:
    • A. 

      Engineering design materials

    • B. 

      Energy discharge machines

    • C. 

      Electro dynamic machining

    • D. 

      Electric discharge machining

  • 140. 
    An alloy is a substance composed of:
    • A. 

      At least three elements, two of which are metals

    • B. 

      At least three elements, one of which must be a non-metal

    • C. 

      Two or more elements, of which at least one is a metal

    • D. 

      Two or more elements, of which at least one is a non-metal

  • 141. 
    Which of the following measurements indicates the smoothest surface finish?
    • A. 

      250 microinches

    • B. 

      0.0002 inches

    • C. 

      0.00015

    • D. 

      100 microinches

  • 142. 
    The internal bores of fastener holes on aircraft are an important source of cracking caused by:
    • A. 

      Fatigue

    • B. 

      Stress corrosion

    • C. 

      Overloading

    • D. 

      Both a and b

  • 143. 
    • A. 

      Turning

    • B. 

      Planing

    • C. 

      Grinding

    • D. 

      Milling

  • 144. 
    • A. 

      Copper

    • B. 

      Steel

    • C. 

      Aluminum

    • D. 

      None of the above

  • 145. 
    • A. 

      Lamination

    • B. 

      Heat-treat crack

    • C. 

      Fatigue crack

    • D. 

      Lap

  • 146. 
    Electroplating sometimes decreases the fatigue strength of highly stressed parts largely as a result of:
    • A. 

      Corrosion of the surface under the plating due to entrapped elecrolyte

    • B. 

      Hydrogen embrittlement

    • C. 

      Improper cleaning of the part after elecroplating

    • D. 

      The build up of stresses in fillets

  • 147. 
    A material which is considered ferromagnetic is:
    • A. 

      Nickel

    • B. 

      Cobalt

    • C. 

      Iron

    • D. 

      All of the above

  • 148. 
    A metal stressed below its elastic limit will return to its original shape:
    • A. 

      Upon heating the metal to its curie point

    • B. 

      Only upon application of an equivalent stress in the opposite direction

    • C. 

      Upon removal of the stress

    • D. 

      All of the above

  • 149. 
    • A. 

      The removal of metal

    • B. 

      Plastic working of the surface

    • C. 

      The deposition of a protective layer to prevent corrosion

    • D. 

      Both a and b

  • 150. 
    Electoplating complex parts results in:
    • A. 

      Uniform plate thickness

    • B. 

      Reduced plate thickness at outside corners and increased plate thickness at inside corners

    • C. 

      Reduced plate thickness at inside corners and increased plate thickness at outside corners

    • D. 

      Increased plate thickness at outside corners and increased plate thickness at center areas

  • 151. 
    Cracks or fractures formed in a casting prior to completion of solidification because of restricted contracting is indicative of a:
    • A. 

      Shrinkage cavity

    • B. 

      Hot tear

    • C. 

      Misrun

    • D. 

      Cold shut

  • 152. 
    The millworking process used most to form metals into 3D shapes is:
    • A. 

      Casting

    • B. 

      Cold rolling

    • C. 

      Welding

    • D. 

      Forging

  • 153. 
    Machinability and fatigue resistance are improved in metals that have been:
    • A. 

      Hot worked

    • B. 

      Cold worked

    • C. 

      Heat treated

    • D. 

      Cast

  • 154. 
    Galvanizing is a process of applying to iron and steel products a protective layer of:
    • A. 

      Tin and tin compounds

    • B. 

      Zinc and zinc compounds

    • C. 

      Aluminum and aluminum compounds

    • D. 

      Copper and copper compounds

  • 155. 
    During on-line (Manufacturing) inspection of components, defective areas are often automatically marked to:
    • A. 

      Allow removal of defects after the inspection, if desired

    • B. 

      Allow destructive examination of defective areas after the inspection, if desired

    • C. 

      Pass rejectable material after the inspection, if desired

    • D. 

      Both a and b

  • 156. 
    As a metals hardness increases:
    • A. 

      Its ability to deform is increased

    • B. 

      Its strength in tension is increased

    • C. 

      Its strength in compression increases

    • D. 

      Its notch toughness is increased

  • 157. 
    A magnetic material may be demagnetized by:
    • A. 

      Heating to above the curie temperature

    • B. 

      Cold working

    • C. 

      Passing the material through an AC coil

    • D. 

      All of the above

  • 158. 
    The overall stress to give failure by fatigue is:
    • A. 

      Greater than that required to produce tensile failure

    • B. 

      Less than that required to produce tensile failure

    • C. 

      Equal to that required to produce tensile failure

    • D. 

      Greater or less than that required to produce tensile failure depending on the type of material

  • 159. 
    Laminations are produced:
    • A. 

      When forging with faulty dies

    • B. 

      When excess metal is folded over during a rolling operation

    • C. 

      When a pipe or blisters present in the original ingot are made directional by rolling

    • D. 

      When blowholes introduced in earlier processing are elongated, by extruding, in the direction of working

  • 160. 
    The factor which must be considered prior to selecting the best method to produce a closed die forging is:
    • A. 

      The size of the forging

    • B. 

      The production quantity

    • C. 

      The design of the forging

    • D. 

      All of the above

  • 161. 
    The most easily forgeable material, from the following, is:
    • A. 

      High strength nickel based alloy

    • B. 

      Stainless steel

    • C. 

      Carbon steel

    • D. 

      High strength aluminum alloy (7075)

  • 162. 
    A riser in the mold is there to:
    • A. 

      Feed the casting as the metal shrinks before and during solidification

    • B. 

      Let air escape from the mold

    • C. 

      Ensure that impurities will segregate outside of the casting

    • D. 

      All of the above

  • 163. 
    Grain boundaries are areas of a metal microstructure:
    • A. 

      Where high melting point constitutes are concentrated

    • B. 

      Made up of rows of atoms arrayed in straight lines

    • C. 

      That are not attacked by etchants and generally stand in relief during metallographic examination

    • D. 

      Where low melting impurities tend to cencentrate

  • 164. 
    • A. 

      Grain growth

    • B. 

      Change of structure

    • C. 

      Recrystallization

    • D. 

      All of the above

  • 165. 
    It is usually difficult to machine a smooth surface on a material when:
    • A. 

      It has been cold worked

    • B. 

      It has high strain hardening ability

    • C. 

      It has low strain hardening ability

    • D. 

      Both a and b

  • 166. 
    The folding of a metal in a thin plate on the surface of a forging causes:
    • A. 

      A cold shut

    • B. 

      Unhealed porosity

    • C. 

      A lap

    • D. 

      A burst

  • 167. 
    Grinding cracks in metal are always:
    • A. 

      Parallel to the grinding wheel rotation

    • B. 

      Subsurface

    • C. 

      Open to the surface

    • D. 

      Inherent discontinuities

  • 168. 
    Micro shrinkage might occur in a casting:
    • A. 

      At the header

    • B. 

      At junctions between light and heavy sections

    • C. 

      The castings surface

    • D. 

      In the heavy part of the casting

  • 169. 
    Severe grinding cracks appear as:
    • A. 

      Wave like patterns

    • B. 

      Widely spaced cracks

    • C. 

      Lattice-work or checkerboard patterns

    • D. 

      A single crack

  • 170. 
    • A. 

      A cold shut

    • B. 

      A lap

    • C. 

      A burst

    • D. 

      A lamination

  • 171. 
    If a weldment has a crater crack, you might find it:
    • A. 

      At the beginning of the weld

    • B. 

      At the end of the weld

    • C. 

      Somewhere in between the beginning and the end of the weld

    • D. 

      At any one of the above places

  • 172. 
    Metal has the property of:
    • A. 

      Failing to unite if too hot

    • B. 

      Retaining large grain structure when forged

    • C. 

      Occupying more space when molten than when solid

    • D. 

      Having a larger grain structure when molten than when solid

  • 173. 
    Porosity is sometimes found in plate or sheet metal and is given the name:
    • A. 

      Stringers

    • B. 

      Seams

    • C. 

      Bursts

    • D. 

      Laminations

  • 174. 
    Grinding cracks occur crosswise to grinding wheel rotation
    • A. 

      True

    • B. 

      False

  • 175. 
    A discontinuity can be caused within a casting as it solidifies.  It would be called:
    • A. 

      A shrinkage cavity

    • B. 

      A blowhole

    • C. 

      An inclusion

    • D. 

      A cold shut

  • 176. 
    Non-metallic inclusions are not present before the billet is worked:
    • A. 

      True

    • B. 

      False

  • 177. 
    Which term best describes what is sought by NDT?
    • A. 

      Surface irregularities

    • B. 

      Sub-surface holes and cracks

    • C. 

      Any breaks in the continuity of metal structure

    • D. 

      Any welding defect

  • 178. 
    Seams are sub-surface discontinuities
    • A. 

      True

    • B. 

      False

  • 179. 
    Which of the items listed below is a discontinuity found in ingots?
    • A. 

      Laminations

    • B. 

      Bursts

    • C. 

      Non-metallic inclusions

    • D. 

      Lack of fusion

  • 180. 
    Stringers are a type of discontinuity sometimes found in:
    • A. 

      Sheet metal

    • B. 

      Bar stock

    • C. 

      Forgings

    • D. 

      Submerged Arc Welds

  • 181. 
    Oxides in weldments can cause discontinuities which are similar to non-metallic inclusions.  But these oxide-caused discontinuities are called:
    • A. 

      Crater cracks

    • B. 

      Seams

    • C. 

      Slag inclusions

    • D. 

      Lack of root penetration

  • 182. 
    Heat treating might cause discontinuities which would probably start at:
    • A. 

      Heavy and light junctions and sharp areas

    • B. 

      Smooth surfaces

    • C. 

      Concave surfaces

    • D. 

      Within the heavy part of the casting

  • 183. 
    Blowholes occur beneath the surface of a casting:
    • A. 

      True

    • B. 

      False

  • 184. 
    Forging laps can occur in which of the following places:
    • A. 

      The top part of the die

    • B. 

      Where the dies come together

    • C. 

      The bottom of the die

    • D. 

      None of the above

  • 185. 
    • A. 

      In the direction of the weld

    • B. 

      Transverse to the direction of the weld

    • C. 

      Only in the parent metal

    • D. 

      Only in the weld cap, and longitudinally with the weld

  • 186. 
    Which of the following is present in ingots?
    • A. 

      Stringers

    • B. 

      Porosity

    • C. 

      Laminations

    • D. 

      Seams

  • 187. 
    In its original shape, porosity would appear:
    • A. 

      Elongated

    • B. 

      Irregular

    • C. 

      Round or nearly round

    • D. 

      Square

  • 188. 
    NDT is a method of locating which of the following:
    • A. 

      Discontinuations

    • B. 

      Dislocations

    • C. 

      Discontinuities

    • D. 

      Disturbances

  • 189. 
    Like ingots, welds can contain porosity:
    • A. 

      True

    • B. 

      False

  • 190. 
    Non-metallic materials trapped in solid metal are described as:
    • A. 

      Porosity

    • B. 

      Inclusions

    • C. 

      Seams

    • D. 

      Laminatinos

  • 191. 
    A hot tear in a casting is a crack.  It could occur:
    • A. 

      Within the heavy part of the casting

    • B. 

      In the light section of the casting

    • C. 

      At junctions of light and heavy castings

    • D. 

      At the header

  • 192. 
    • A. 

      Hot tears

    • B. 

      Crater cracks

    • C. 

      Microshrinkage

    • D. 

      Seams

  • 193. 
    A forging lap might occur:
    • A. 

      Where grain direction makes an abrupt change

    • B. 

      In the center of a forging

    • C. 

      At the junction of light and heavy section

    • D. 

      At the junction of the sprue and the ingate

  • 194. 
    A lamination is something which might be found in:
    • A. 

      Bar stock

    • B. 

      Pipe

    • C. 

      Forgings

    • D. 

      Sheet or plate material

  • 195. 
    In the beginning all steel is perfect:
    • A. 

      True

    • B. 

      False

  • 196. 
    • A. 

      Lamination

    • B. 

      Burst

    • C. 

      Lap

    • D. 

      Stringer

  • 197. 
    Non-metallic inclusions are:
    • A. 

      Round in shape

    • B. 

      Rectangular in shape

    • C. 

      Irregular in shape

    • D. 

      Tall

  • 198. 
    Grain direction in steel bar stock is always:
    • A. 

      Through the length of the bar

    • B. 

      Through the width of the bar

    • C. 

      Spread out in all directions

    • D. 

      A bar of steel has no grain direction

  • 199. 
    In forgings, grain:
    • A. 

      Follows the shape of the dies

    • B. 

      Becomes coarser

    • C. 

      Retains its original shape

    • D. 

      Its lateral to the shape of the dies

  • 200. 
    In which of the following might you expect to find a seam?
    • A. 

      Forgings

    • B. 

      Castings

    • C. 

      Bar stock

    • D. 

      Sheet or plate material

  • 201. 
    A cold shut has:
    • A. 

      A smooth, curved appearance

    • B. 

      A ragged shape

    • C. 

      A straight thin line

    • D. 

      An undulating shape

  • 202. 
    Premature blocking of a gate during the pouring of a casting might cause:
    • A. 

      A lap

    • B. 

      Microshrinkage

    • C. 

      Stringers

    • D. 

      A lamination

  • 203. 
    NDT is used for locating only those discontinuities open to the surface:
    • A. 

      True

    • B. 

      False

  • 204. 
    Usually, the most serious type of flaw in metals is/are:
    • A. 

      Porosity

    • B. 

      Cracks

    • C. 

      Inclusions

    • D. 

      Laminations

  • 205. 
    A definite break in the material caused by excessive working of the metal during the forging, rolling or extruding operation is called a:
    • A. 

      Cold shut

    • B. 

      Seam

    • C. 

      Burst

    • D. 

      Hot tear

  • 206. 
    A service defect that appears as a series of small micro-openings with no definite pattern and extend in any direction following the grain boundaries is:
    • A. 

      A fatigue crack

    • B. 

      A fillet crack

    • C. 

      Hydrogen embrittlement

    • D. 

      Intergranular corrosion

  • 207. 
    An extremely thin discontinuity that is the result of pipes, or inclusions flattened and made directional by working is called:
    • A. 

      A stringer

    • B. 

      A lamination

    • C. 

      A seam

    • D. 

      A cold shut

  • 208. 
    Fine lines, likely to occur in groups caused by non-metallic impurities present in the original ingot and extruded lengthwise are called:
    • A. 

      Stringers

    • B. 

      Seams

    • C. 

      Laminations

    • D. 

      Laps

  • 209. 
    All metals solidify in a ___________ structure.
    • A. 

      Crystalline

    • B. 

      Amorphous

    • C. 

      Molecular

    • D. 

      Compounded

  • 210. 
    As cold working progresses, the energy required for further processing (assuming the temperature of the part is held constant)
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Remains constant

    • D. 

      Any one of the above may be true depending on the material

  • 211. 
    The process in which a steel is heated above the upper critical temperature into the austenite and then cooled slowly through the transformation range in the furnace or a good heat insulated material is known as:
    • A. 

      Tempering

    • B. 

      Full annealing

    • C. 

      Normalizing

    • D. 

      Quenching

  • 212. 
    Better mechanical properties are obtained with:
    • A. 

      A fine grain structure

    • B. 

      A large grain structure

  • 213. 
    Which of the following metals is least suitable to be cold worked?
    • A. 

      Iron

    • B. 

      Zinc

    • C. 

      Low carbon steel

    • D. 

      Nickel

  • 214. 
    The length of time required for recrystallization is:
    • A. 

      Proportional to the temperature and inversely proportional to the amount of deformation (strain) present

    • B. 

      Proportional to the temperature and the amount of deformation present

    • C. 

      Inversely proportional to the temperature and the amount of deformation present

    • D. 

      Inversely proportional to the temperature and directly proportional to the amount of deformation present

  • 215. 
    Inherent discontinuities are:
    • A. 

      Discontinuities that exist inside the material below the surface.

    • B. 

      Just a property of the alloy of metal.

    • C. 

      All removed by cropping.

    • D. 

      Formed when molten metal solidifies.

  • 216. 
    Discontinuities are:
    • A. 

      Always defects and usually rejected.

    • B. 

      Either acceptable or rejected.

    • C. 

      Either relevant or nonrelevant.

    • D. 

      Discontinuities that cause the test object to fail.

  • 217. 
    • A. 

      Seam

    • B. 

      Lap

    • C. 

      Hot tear

    • D. 

      Cold shut

  • 218. 
    Level II magnetic particle technicians should always be able to evaluate if an indiction is relevant, false or nonrelevant, and if it is rounded or linear.
    • A. 

      True

    • B. 

      False

  • 219. 
    An example of a processing discontinuity that is the result of an inherent discontinuity changing shape during rolling is a:
    • A. 

      Cooling crack.

    • B. 

      Burst

    • C. 

      Lap

    • D. 

      Lamination

  • 220. 
    A burst may be found in a:
    • A. 

      Casting

    • B. 

      Forging

    • C. 

      Ingot

    • D. 

      Weld

  • 221. 
    A common discontinuity in a weld or casting that is difficult to detect by magnetic particle testing is:
    • A. 

      A crack

    • B. 

      Porosity

    • C. 

      Shrinkage

    • D. 

      Lamination

  • 222. 
    Cracks may occur at any stage of manufacturing
    • A. 

      True

    • B. 

      False

  • 223. 
    A weld discontinuity that always occurs at the root of a weld is:
    • A. 

      Lack of fusion

    • B. 

      Slag inclusions

    • C. 

      Lack of penetration

    • D. 

      Undercut

  • 224. 
    Fatigue cracking is always caused by a single overloading.
    • A. 

      True

    • B. 

      False

  • 225. 
    Hydrogen will cause porosity if present during heat treating or welding.
    • A. 

      True

    • B. 

      False

  • 226. 
    A slag inclusion in a weld is normally found in a weld crater.
    • A. 

      True

    • B. 

      False

  • 227. 
    A dark narrow line running down the center of the weld is:
    • A. 

      Undercut

    • B. 

      Incomplete penetration

    • C. 

      Porosity

    • D. 

      Segregation

  • 228. 
    A dark linear indication appearing at the edge of a weld is probably:
    • A. 

      Incomplete penetration

    • B. 

      Slugging

    • C. 

      Porosity

    • D. 

      Undercut

  • 229. 
    Cold shuts are most likely to be found in:
    • A. 

      Extrusions

    • B. 

      Forgings

    • C. 

      Castings

    • D. 

      Sintered parts