Better Buildings Through Better Fasteners

20 Questions | Total Attempts: 42

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Better Buildings Through Better Fasteners - Quiz

Proficiency quiz for the online continuing education course.


Questions and Answers
  • 1. 
    If a fastener is selected to meet normal design loads, it will:
    • A. 

      Be adequate in all situations

    • B. 

      Fail

    • C. 

      Be adequate except under special, predictable conditions

  • 2. 
    The risks from fastener failure include:
    • A. 

      Loss of use

    • B. 

      Injury or death

    • C. 

      Lawsuits

    • D. 

      All of the above

  • 3. 
    Extreme loading poses a risk of fastener failure because it:
    • A. 

      Happens very rarely

    • B. 

      Places brief, sudden loads on fasteners in excess of their normal design loads

    • C. 

      Cannot be designed for

  • 4. 
    Self-drilling, self-tapping fasteners are frequently used in modern construction for:
    • A. 

      Speed

    • B. 

      Better holding power

    • C. 

      Better appearance

  • 5. 
    Standard self-drilling fasteners are:
    • A. 

      Hard cases

    • B. 

      Case hardened

    • C. 

      Unhardened

  • 6. 
    A standard self-drilling fastener is
    • A. 

      Harder on the outside than the inside

    • B. 

      Harder on the inside than the outside

    • C. 

      Equally hard throughout

  • 7. 
    Selectively hardened fasteners are hardest
    • A. 

      In the center of the shank

    • B. 

      At the tip

    • C. 

      At the head

  • 8. 
    A selectively hardened fastener is better at handling extreme loading because
    • A. 

      The tip is harder than n a standard fastener

    • B. 

      The head is bigger than a standard fastener

    • C. 

      The shank is more ductile through its entire section than a standard fastener

  • 9. 
    Under extreme loading, ductility enables a fastener to:
    • A. 

      Absorb energy by deforming

    • B. 

      Absorb energy by remaining unchanged

    • C. 

      Absorb energy by failing

  • 10. 
    In areas where a fastener will be exposed to moisture or other corrosives, the fastener should be made of:
    • A. 

      Zinc

    • B. 

      Aluminum

    • C. 

      Stainless steel

  • 11. 
    In a structure where an internal explosion is a predictable risk, you should specify
    • A. 

      A standard fastener, because it will fail and relieve pressure

    • B. 

      A fastener designed to fail under pressure, attaching a tethered pressure-relief panel

    • C. 

      A fastener designed for greater than normal loads, so it will resist the blast pressure

  • 12. 
    Visible corrosion is
    • A. 

      The only kind of corrosion that can affect fasteners

    • B. 

      The only kind of corrosion that cannot affect fasteners

    • C. 

      Neither of the above

  • 13. 
    Galvanic corrosion can occur
    • A. 

      Only when two dissimilar metals are in contact in the presence of an electrolyte

    • B. 

      Anytime two dissimilar metals are in contact

    • C. 

      Anytime a metal is in the presence of an electrolyte

  • 14. 
    When Galvanic corrosion  occurs between aluminum and steel, a steel fastener will be
    • A. 

      The protected metal

    • B. 

      The sacrificial metal

    • C. 

      Unaffected

  • 15. 
    During a Galvanic reaction with a water electrolyte, the protected metal attracts:
    • A. 

      Oxygen

    • B. 

      Hydrogen

    • C. 

      Nitrogen

  • 16. 
    Hydrogen only embrittles steel that has a Rockwell hardness of
    • A. 

      Less than 20

    • B. 

      Greater than 50

    • C. 

      Greater than 35

  • 17. 
    Case hardened fasteners typically have a Rockwell hardness on the surface of
    • A. 

      Less than HRC 20

    • B. 

      Greater than HRC 50

    • C. 

      Less than HRC 35

  • 18. 
    Hydrogen embrittlement happens most actively
    • A. 

      At stress points

    • B. 

      On new steel

    • C. 

      In warm weather

  • 19. 
    For applications where two dissimilar metals will be in contact, you should specify
    • A. 

      A standard fastener

    • B. 

      A selectively hardened fastener

    • C. 

      An extra fastener

  • 20. 
    Fasteners are specified according to
    • A. 

      The contractor's choice

    • B. 

      The angle at which they will be installed

    • C. 

      The substrate they are attaching into

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