Better Buildings Through Better Fasteners
Proficiency quiz for the online continuing education course.
- 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
Questions: 10 | Attempts: 86 | Last updated: Mar 21, 2022
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