Wood Fastners Quiz

Quiz Answers – Wood Fastners – OL 161

1.	The strength and stability of any structure depend heavily on the fastenings that hold its parts together.
	⊗	True
		False
2.	What does LRFD stand for?
	⊗	Load and Resistance for Factor Design
		Lumber and Resistance for Factor Design
		Load Resistance for Factor Development
		None of the above
3.	Nails are the most common mechanical fastenings used in wood construction
	⊗	True
		False
4.	What does figure 7-2 illustrate about? (Refer Pg 7-1)
	⊗	Various types of nails
		Steel Side Plates
		Metal Plate Connectors
		None of the above
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.
	⊗	True
		False
6.	The surface condition of nails is frequently modified during the manufacturing process to improve withdrawal resistance.
	⊗	True
		False
7.	The form and magnitude of the deformations along the shank does not influence the performance of the nails in various wood species.
		True
	⊗	False
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.
	⊗	True
		False
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	In dry or green wood, a clinched nail provides 45% to 170% more withdrawal resistance than an unclinched nail when withdrawn soon after driving.
	⊗	True
		False
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.
	⊗	True
		False
11.	The resistance of nails to withdrawal is generally lowest when they are driven perpendicular to the grain of the wood.
		True
	⊗	False
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.
	⊗	True
		False
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.
	⊗	True
		False
14.	What does figure 7-5 illustrate about? (Refer Pg 7-9)
	⊗	Common types of wood screws
		Steel Side Plates
		Metal Plate Connectors
		None of the above
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.
		True
	⊗	False
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.
	⊗	True
		False
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?
	⊗	Diameter of the screw shank
		Design formula
		Design value of the screw
		None of the above
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.
	⊗	True
		False
19.	What does figure 7-10 illustrate about? (Refer Pg 7-12)
	⊗	Multiplication factors for loads computed from Equation
		A, Clean-cut, deep penetration of thread
		Scholten nomograph
		None of the above
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.
	⊗	True
		False
21.	Both the properties of the wood and the quality of the bolt are factors in determining the strength of a bolted joint.
	⊗	True
		False

1 -T
2 – 1 Load and Resistance for Factor Design
3 – T
4 – 1 Various types of nails
5 – T
6 – T
7 – F
8 – T
9 – T
10 – T
11 – F
12 – T
13 – T
14 – 1 Common types of wood screws
15 – F
16 – T
17 – 1 Diameter of the screw shank
18 – T
19 – 1 Multiplication factors for loads computed from Equation
20 – T
21 – T

100% correct – 06 Feb 2022

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