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1 Wood Structures

QuestionAnswer
Which statement concerning wood decay is correct? Any form or amount of decay is not permitted.
The strength of a well-designed and properly prepared wood splice joint is provided by the glue
Which of the following conditions will determine acceptance of wood with mineral streaks? Careful inspection fails to reveal any decay.
The I-beam wooden spar is routed to reduce weight.
A faint line running across the grain of a wood spar generally indicates compression failure.
When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using circular or elliptical patches.
Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair? AC 43.13-1B.
Laminated wood spars may be substituted for solid rectangular wood spars if the same quality wood is used in both.
Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its parallel grain construction.
Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface at right angles to the grain.
Which statement about wood decay is correct? Decay is not acceptable in any form or amount.
In cases of elongated bolt holes in a wood spar or cracks in the vicinity of boltholes, a new section of spar should be spliced in or the spar replaced entirely.
Pin knot clusters are permitted in wood aircraft structure provided they produce a small effect on grain direction.
Glue deterioration in wood aircraft structure is indicated when a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to the glue.
Any wooden member that has been overstressed is subject to which type of failure? Compression.
The cantilever wing uses no external bracing.
Created by: Jack Mollohan
 

 



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