Engineering, Materials And Components Quiz

229 Questions | Total Attempts: 228

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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