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WorksheetsGluing and Adhesives Quiz
Total questions: 33
Worksheet time: 17mins
Powder resins showing sticking or corrosion in the box should be:
Dried and reused
Disposed of
Mixed immediately
Before gluing, surfaces must be:
Polished
Clean and free of grease or varnish
Painted with primer
How should plywood surfaces be prepared for gluing?
Sanded lightly to remove glazing
Painted with dope
Roughened deeply
How should timber surfaces be prepared for gluing?
Scraped or roughened to form a key
Coated with oil
Smoothed to mirror finish
What happens if sanding is excessive before gluing plywood?
Improves adhesion
Weakens the joint fit
Seals the pores
Why should joint surfaces not be handled after preparation?
Finger oils reduce adhesion
Causes splinters
Alters grain direction
What conditions affect the pot life of synthetic resin adhesives?
Humidity and glue type
Temperature and hardener ratio
Surface texture only
What temperature range should timber be allowed to reach before gluing?
Room temperature
0°C
100°C
Why should timber be kept clear of radiators before gluing?
Prevent overheating
Avoid softening glue
Prevent uneven drying
How should adhesive be applied?
To both surfaces of a joint
To one surface only
Only on edges
Which tools give best results for applying adhesive?
Grooved rubber rollers
Brushes only
Metal spatula
Which surfaces require thicker adhesive spreads?
End-grained surfaces
Side-grained surfaces
Laminated surfaces
For gluing a soft timber to a dense timber, what method improves results?
Apply varnish to soft surface
Precoat and partially dry softer surface
Use extra hardener
Frequent tests on glued joints should be made to:
Check curing color
Ensure joining technique quality
Estimate pot life
What is the minimum length of test samples for glued joints?
25 mm
50 mm
10 mm
How much overlap is required in a glued test sample?
12–18 mm
5–8 mm
25–30 mm
After testing, what percentage of wood fibers should appear on the fractured surface?
50%
75%
90%
Wet tests on glue joints are made by immersing samples in:
Solvent
Water
Oil
According to BS 1204, immersion for 24 hours should be at:
15–25°C
30–35°C
40–50°C
Wet tests should be done only after joints are conditioned for:
2–3 days
2–3 weeks
2–3 hours
What is the purpose of sanding clear dope between coats?
Add gloss
Improve adhesion
Seal pores
How should defective fabric over plywood be treated?
Painted
Removed and inspected
Repaired with extra dope
Which inspection should be done to verify internal structure condition?
Visual only
Penetrant inspection
Tap test
What must be done before applying fabric covering?
Wash the aircraft
Inspect and remove all foreign matter
Apply dope first
Ideal room temperature for fabric application is:
10–15°C
16–21°C
25–30°C
Maximum relative humidity allowed during fabric covering is:
70%
90%
50%
What are the two directions in woven fabric?
Warp and weft
Front and rear
Top and bottom
The non-fraying edge of fabric is called:
Borderline
Selvedge
Seamline
What fabric is typically used for unsupported covering?
Cotton
Linen
Polyester
Why are artificial fabrics like polyester preferred?
Easier to dye
Longer life and resistance to UV
Cheaper to produce
What type of fabric is used to cover wooden surfaces?
Light cotton
Nylon
Fiberglass
Fabric tapes are used for:
Decoration
Covering edges and ribs
Sealing dope
What is the primary advantage of using epoxy adhesives?
Low cost
High strength and durability
Fast curing time
