Before installing fabric

pre-dope any structure where fabric will be attached
repair any damage to structure
dope-proof other structure that may come in contact with dope
all of the above

Question

Before installing fabric

pre-dope any structure where fabric will be attached
repair any damage to structure
dope-proof other structure that may come in contact with dope
all of the above

BlackTom AI · Accepted Answer

Pre-doping and dope-proofing are protective steps that ensure good adhesion of fabric, prevent chemical damage from aircraft dope, and guarantee the structural integrity of the airframe before covering.

1. Relevant knowledge points and concepts
- Dope (cellulose or similar finishing compounds) is used to tighten and seal fabric coverings and must bond to the underlying structure where the fabric is attached. 
- Many airframe materials (bare wood, certain metals, older finishes, adhesives, sealants) can be damaged or chemically attacked by dope solvents unless they are sealed or treated first. 
- Any existing structural damage under the fabric will be hidden and can lead to failure if not repaired prior to covering.

2. Step-by-step reasoning
- Pre-dope any structure where fabric will be attached: Sealing or applying a suitable primer to attachment points ensures the dope adheres properly to the structure and prevents excessive absorption into porous materials. Without this, the fabric joints can fail or the dope will soak away, reducing fabric tautness and durability.
- Repair any damage to structure: Structural repairs must be completed and inspected before fabric installation because once covered, defects are concealed and stresses are transferred through the new covering. A repaired and sound substrate is required for safe, long-lasting work.
- Dope-proof other structure that may come in contact with dope: Areas adjacent to the fabric or likely to contact dope vapors should be protected or sealed (dope-proofed) to prevent chemical attack, swelling, or deterioration of materials not intended to be exposed to dope.

3. Intermediate considerations (no numerical calculations here)
- Each of the three actions addresses a distinct failure mode: poor adhesion, concealed structural weakness, and chemical damage. All three must be done to ensure a safe, durable fabric installation.

4. Why the correct answer is correct
Because pre-doping attachment points, repairing structural damage, and dope-proofing susceptible nearby structure are all necessary preparatory measures, the comprehensive choice that includes each is correct.

5. Why the other options are incorrect
- Choosing only one or two of the listed actions leaves an unaddressed risk (adhesion problems, hidden damage, or chemical attack). None of the single or paired actions alone fully prepares the structure.

Conclusion: Therefore, the correct choice is "all of the above," matching the provided answer.

Before installing fabric pre-dope any structure where fabric will be attached repair any damage to structure dope-proof other structure that may come in contact with dope all of the above单项选择题

类似问题

Condition of the fabric covering must be determined on every 100 hour and annual inspection.

The vast majority of aircraft control cables are terminated with swaged terminals, that must be

Which statement concerning the 100-hour inspection of an airplane equipped with a push pull tube type control system is true?

Mineral streaks in aircraft wood structures are permitted as long as

Certificated mechanics with a powerplant rating may perform the

Certificated mechanics, under their general certificate privileges, may

Which of the following statements is true for a certificated and appropriately rated mechanic regarding repairs and alterations?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单