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1-WOOD STRUCTURES (PTS) Questions and Answers

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1-WOOD STRUCTURES (PTS) Questions and Answers An assembly of two or more layers of wood that have been glued together with the grains of all layers or laminations approximately parallel (Airframe Handbook Vol 1 p 6-7).​ What is a laminated wood assembly? All gluing operations should be p...

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  • January 4, 2025
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PTS
  • PTS
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1-WOOD STRUCTURES (PTS) Questions
and Answers
An assembly of two or more layers of wood that have been glued together with the
grains of all layers or laminations approximately parallel (Airframe Handbook Vol 1 p 6-
7). - answer What is a laminated wood assembly?

All gluing operations should be performed above 70 degrees F for proper performance
of the adhesive. Higher temperatures shorten the assembly times (Airframe Handbook
Vol 1 p 6-12) (AC43.13-1B p 1-6). - answer What effects does room temperature
have on gluing wood structures using resin glue?

Discoloration could be signs of decay or water penetration (Airframe Handbook Vol 1 p
6-5) (AC43.13-1B p 1-11). - answer Why is it necessary to examine all stains and
discoloration of wood carefully?

Thick glue lines, air bubbles, and a weak glue joint (Airframe Handbook Vol 1 p 6-12). -
answer What is the result of insufficient gluing pressure?

Sitka spruce (Airframe Handbook Vol 1 p 6-7) . - answer What species of wood is
considered the standard for aircraft structures?

A moisture meter (Airframe Handbook Vol 1 p 6-3) (AC43.13-1B p 1-14). - answer
During a preliminary inspection of an aircraft, what instrument is used to determine the
moisture content of the wood structure?

Tapping with light plastic hammer or screwdriver handle, probe area with metal awl or
thin-bladed screwdriver (Airframe Handbook Vol 1 p 6-7) (AC43.13-1B p 1-29). - answer
What mechanical testing tools can be used to detect defects in the wooden structure?

Anytime a reinforcement plate exists that is not feathered out on its ends, a stress riser
exists at the ends of the plate and a failure of the primary structure can be expected at
that point (Airframe Handbook Vol 1 p 6-6). - answer When installing a reinforcement
plate on primary wood structure, why are the ends feathered out?

8-12% (AC43.13-1B p 1-14) (Airframe Handbook Vol 1 p 6-3). - answer When
inspecting a wooden structure, what is an acceptable percentage of moisture content?

A high percentage of at least 75% of wood fibers evenly distributed over the fractured
glue surface (Airframe Handbook Vol 1 p 6-13). - answer During a destructive test of
a sample bonded joint, what observation indicates the properties of a good bond?

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