Airframe O&P Questions 2026
Exam All Answers and
Illustrations Given
What species of wood is used as a standard for strength properties of other
species of wood used in aircraft structures? - 🧠 ANSWER ✔✔Sitka Spruce
What is the difference between laminated wood and plywood? - 🧠
ANSWER ✔✔Laminated has a parallel (consistent) wood grain throughout
the layers, plywood is mixed.
,What are the two types of glue used for aircraft wood structure repair? - 🧠
ANSWER ✔✔Epoxy glue and Plastic resin glue.
What method is used to prepare plywood for bending? - 🧠 ANSWER
✔✔Soaked in hot water then placed on a form till dry.
What are the results of using insufficient gluing pressure when making a
wood joint? - 🧠 ANSWER ✔✔Thick glue lines indicating weak joints.
What are some of the various methods used to apply pressure to joints in
aircraft gluing operations? - 🧠 ANSWER ✔✔Brads, Nails, Screws, Clamps,
and presses (hydraulic and electric).
Why does the strength of a scarf joint depend upon the accuracy of the two
beveled surfaces? - 🧠 ANSWER ✔✔An inaccurate bevel will reduce the
effective glue area.
What area of a wood spar may not be spliced? - 🧠 ANSWER ✔✔Under
wing attachments, landing gear, engine mount, and interplane strut fittings.
What type of joint is generally used in splicing structural members in
aircraft? - 🧠 ANSWER ✔✔A scarf Joint.
, Are mineral streaks acceptable in aircraft wood? - 🧠 ANSWER ✔✔Yes, if
careful inspection fails to reveal any decay.
What is compression wood and why is it not acceptable for aircraft
structures? - 🧠 ANSWER ✔✔Wood that has high specific gravity and
appearance or high summer growth. It's very detrimental to strength.
What determines the required quality and strength of fabric that is to be
used for covering aircraft? - 🧠 ANSWER ✔✔PSF of wing loading and the
'never-exceed' airspeed.
What is the maximum permissible deterioration of aircraft fabric before it is
considered unworthy? - 🧠 ANSWER ✔✔More than 30% from its original
tensile strength.
What is the purpose, location, and method of installing drain grommets in
aircraft fabric? - 🧠 ANSWER ✔✔Purpose is to allow moisture to leave the
aircraft and furnish ventilation. Located under the airfoil at the trailing edge,
close to the rib, and at the lowest point on the center of the fuselage bay.
Brass grommets should be mounted on fabric patches and then doped;
plastic grommets are doped directly to the covering.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Exam All Answers and
Illustrations Given
What species of wood is used as a standard for strength properties of other
species of wood used in aircraft structures? - 🧠 ANSWER ✔✔Sitka Spruce
What is the difference between laminated wood and plywood? - 🧠
ANSWER ✔✔Laminated has a parallel (consistent) wood grain throughout
the layers, plywood is mixed.
,What are the two types of glue used for aircraft wood structure repair? - 🧠
ANSWER ✔✔Epoxy glue and Plastic resin glue.
What method is used to prepare plywood for bending? - 🧠 ANSWER
✔✔Soaked in hot water then placed on a form till dry.
What are the results of using insufficient gluing pressure when making a
wood joint? - 🧠 ANSWER ✔✔Thick glue lines indicating weak joints.
What are some of the various methods used to apply pressure to joints in
aircraft gluing operations? - 🧠 ANSWER ✔✔Brads, Nails, Screws, Clamps,
and presses (hydraulic and electric).
Why does the strength of a scarf joint depend upon the accuracy of the two
beveled surfaces? - 🧠 ANSWER ✔✔An inaccurate bevel will reduce the
effective glue area.
What area of a wood spar may not be spliced? - 🧠 ANSWER ✔✔Under
wing attachments, landing gear, engine mount, and interplane strut fittings.
What type of joint is generally used in splicing structural members in
aircraft? - 🧠 ANSWER ✔✔A scarf Joint.
, Are mineral streaks acceptable in aircraft wood? - 🧠 ANSWER ✔✔Yes, if
careful inspection fails to reveal any decay.
What is compression wood and why is it not acceptable for aircraft
structures? - 🧠 ANSWER ✔✔Wood that has high specific gravity and
appearance or high summer growth. It's very detrimental to strength.
What determines the required quality and strength of fabric that is to be
used for covering aircraft? - 🧠 ANSWER ✔✔PSF of wing loading and the
'never-exceed' airspeed.
What is the maximum permissible deterioration of aircraft fabric before it is
considered unworthy? - 🧠 ANSWER ✔✔More than 30% from its original
tensile strength.
What is the purpose, location, and method of installing drain grommets in
aircraft fabric? - 🧠 ANSWER ✔✔Purpose is to allow moisture to leave the
aircraft and furnish ventilation. Located under the airfoil at the trailing edge,
close to the rib, and at the lowest point on the center of the fuselage bay.
Brass grommets should be mounted on fabric patches and then doped;
plastic grommets are doped directly to the covering.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
