单选题 8008.The I-beam wooden spar is routed to

A、 —increase strength,
B、 obtain uniform strength,
C、 reduce weight
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单选题 8001.Laminated wood spars maybe substituted for solid rectangular wood spars

A、only in certain instances where the primary load is shared by one or more other original structural member.
B、if the same quality wood is used in both.
C、only upon specific approval by the manufacturer or the FAA.

单选题 8006-1. Which statement concerning wood decay is correct?

A、—Decay that appears to be mineral streaks is acceptable.
B、—A limited amount of decay along the beveled edges of unrouted beams is acceptable.
C、—Any form or amount of decay is not permitted

单选题 8002.The strength of a well-designed and properly prepared wood splice joint is provided by the

A、bearing surface of the wood fibers
B、glue.
C、reinforcement plates.

单选题 8006.Which statement about wood decay is correct?

A、Decay that occurs before the wood is seasoned does not affect the strength of the finished piece
B、A limited amount of certain kinds of decay is accept_x005fable in aircraft woods since decay affects the binding between the fibers and not the fibers themselves.
C、Decay is not acceptable in any form or amount.

单选题 8005.A faint line running across the grain of a woodspar generally indicates

A、compression failure
B、shear failure.
C、decay

单选题 8003.Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?

A、AC 43.13-1B
B、Aircraft Specifications or Type Certificate Data Sheets.
C、Technical Standard Orders

单选题 8004» In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes,

A、it is permissible to ream the hole, plug with hardwood, and redrill.
B、the spar may be reinforced by using hardwood reinforcing plates.
C、a new section of spar should be spliced in or the spar replaced entirely.

单选题 8005-1.Any wooden member that has been overstressed is subject to which type of failure?

A、Bond failure.
B、Compression failure.
C、Finish failure