Quiz Questions: |
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| 1. |
The strength and stability of any structure depend heavily on the fastenings that hold its parts together.
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True |
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False |
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| 2. |
What does LRFD stand for?
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Load and Resistance for Factor Design |
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Lumber and Resistance for Factor Design |
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Load Resistance for Factor Development |
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None of the above |
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| 3. |
Nails are the most common mechanical fastenings used in wood construction
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True |
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False |
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| 4. |
What does figure 7-2 illustrate about?
(Refer Pg 7-1)
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Various types of nails |
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Steel Side Plates |
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Metal Plate Connectors |
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None of the above |
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| 5. |
The resistance of a nail shank to direct withdrawal from a piece of wood depends on the density of the wood, the diameter of the nail, and the depth of penetration. |
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True |
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False |
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| 6. |
The surface condition of nails is frequently modified during the manufacturing process to improve withdrawal resistance.
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True |
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False |
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| 7. |
The form and magnitude of the deformations along the shank does not influence the performance of the nails in various wood species.
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True |
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False |
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| 8. |
Fasteners with properly applied nylon coating tend to retain their initial resistance to withdrawal compared with other coatings, which exhibit a marked decrease in withdrawal resistance within the first month after driving.
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True |
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False
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| 9. |
In dry or green wood, a clinched nail provides 45% to 170% more withdrawal resistance than an unclinched nail when withdrawn soon after driving. |
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True |
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False |
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| 10. |
The nailing characteristics of plywood are not greatly different from those of solid wood except for plywood's greater resistance to splitting when nails are driven near an edge. |
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True |
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False |
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| 11. |
The resistance of nails to withdrawal is generally lowest when they are driven perpendicular to the grain of the wood. |
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True |
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False |
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| 12. |
As a general rule, nails should be driven no closer to the edge of the side member than one-half its thickness and no closer to the end than the thickness of the piece. |
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True |
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False |
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| 13. |
The load in lateral resistance varies approximately as the 3/2 power of the diameter when other factors, such as quality of metal, type of shank, and depth of penetration, are similar to nails.
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True |
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False |
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| 14. |
What does figure 7-5 illustrate about?
(Refer Pg 7-9)
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Common types of wood screws |
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Steel Side Plates |
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Metal Plate Connectors |
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None of the above |
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| 15. |
Deformed-shank nails carry somewhat lower minimum lateral loads than do the same pennyweight common wire nails, but both perform different at small distortions in the joint. |
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True |
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False |
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| 16. |
The resistance of wood screw shanks to withdrawal from the side grain of seasoned wood varies directly with the square of the specific gravity of the wood.
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True |
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False |
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| 17. |
The proportional limit loads obtained in tests of lateral resistance for wood screws in the side grain of seasoned wood are given by the empirical equation
p = KD2
What does D mean in the above formula?
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Diameter of the screw shank |
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Design formula |
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Design value of the screw |
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None of the above |
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| 18. |
Lag screws are commonly used because of their convenience, particularly where it would be difficult to fasten a bolt or where a nut on the surface would be objectionable. |
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True |
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False |
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| 19. |
What does figure 7-10 illustrate about?
(Refer Pg 7-12)
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Multiplication factors for loads computed from Equation |
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A, Clean-cut, deep penetration of thread |
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Scholten nomograph |
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None of the above |
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| 20. |
The bearing stress under a bolt is computed by dividing the load on a bolt by the product LD, where L is the length of a bolt in the main member and D is the bolt diameter. |
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True |
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False |
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| 21. |
Both the properties of the wood and the quality of the bolt are factors in determining the strength of a bolted joint. |
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True |
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False |
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