Engineering, Materials And Components Quiz

50 Questions

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Engineering Quizzes & Trivia

When you think of an engineer you may see people with the power to create that which most of us cannot and this is thanks to thousands of hours of study and practice. Are you an engineering student? Below are some test questions for Materials and Processes exams. It is very helpful in your studying for CGSB exams. Give it a shot!


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. 

      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. 
    • 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. 
    • 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. 
    • 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. 
    When thick and thin casting sections are adjacent to each other, what discontinuity may result?
    • 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. 

      A fatigue crack

    • B. 

      A heat treat crack

    • C. 

      A seam

    • D. 

      A stringer