Module-06
MATERIALS AND HARDWARE
. Time allowed: 100 minutes.
Category B1&B2: 80 MCQ 6.1 Aircraft materials — ferrous LEVEL ** No. of MCQ
(a) Characteristics, properties and identification of common alloy steels 2 3
used in aircraft; Heat treatment and application of alloy steels.
(b) Testing of ferrous materials for hardness, tensile strength, fatigue 1 2
strength and impact resistance.
(c) Repair and inspection procedures for ferrous materials, structures, and 2 2
airframes.
6.2 Aircraft materials — non-ferrous
(a) Characteristics, properties and identification of common 2 4
non-ferrous materials used in aircraft; Heat treatment and
application of non-ferrous materials.
(b) Testing of non-ferrous material for hardness, tensile strength, 1 3
fatigue strength and impact resistance.
(c) Repair and inspection procedures for non-ferrous materials, 2 2 structures, and airframes.
6.3 Aircraft materials — composite and non-metallic
6.3.1 Composite and non-metallic materials other than wood and fabric
(a) Characteristics, properties and identification of common composite and 2 4
non-metallic materials, other than wood, used in aircraft; Sealant and
bonding agents.
(b) Detection of defects/deterioration in composite and non-metallic 2 4
materials.
(c) Repair of and inspection procedures for composite and non-metallic 2 2
materials, structures, and airframes.
6.3.2 Wooden structures 2 4
Construction methods of wooden airframe structures; Characteristics,
properties and types of wood and glue used in aeroplanes ; Preservation
and maintenance of wooden structures;Types of defects in wood material
and wooden structures; Detection of defects in wooden structures;
Repair of wooden structures.
6.3.3 Fabric covering 1 4
Characteristics, properties and types of fabrics used in aeroplanes;
Inspection methods for fabrics; Types of defects in fabrics; Repair of fabric
covering.
6.4 Corrosion
(a) Chemical fundamentals; Formation by galvanic action process, 1 3
microbiological contamination, mechanical stress.
(b) Types of corrosion and their identification; Causes of corrosion; 3 5
Material types, and their susceptibility to corrosion.
6.5 Fasteners
6.5.1 Screw threads 2 4
Screw nomenclature; Thread forms, dimensions and tolerances for
standard threads used in aircraft; Measuring screw threads.
6.5.2 Bolts, studs, and screws 2 6
Bolt types: specification, identification and marking of aircraft bolts,
international standards; Nuts: self-locking, anchor, standard types;
Machine screws: aircraft specifications; Studs: types and uses,
insertion, and removal; Self-tapping screws, dowels.
6.5.3 Locking devices 2 2
Tab and spring washers, locking plates, split pins, pal-nuts, wire
locking, quick- release fasteners, keys, circlips, cotter pins.
6.5.4 Aircraft rivets 2 3
Types of solid and blind rivets: specifications and identification, heat treatment.
6.6 Pipes and unions
(a) Identification and types of rigid and flexible pipes and their 2 1
connectors used in aircraft;
(b) Standard unions for aircraft hydraulic, fuel, oil, pneumatic 2 2
and air system pipes.
6.7 Springs — 2 1
Types of springs, materials, characteristics, and applications.
6.8 Bearings 1 2 2 2 4
Purpose of bearings, loads, material, construction; Types of
bearings and their application.
6.9 Transmissions 1 2 2 2 4
Gear types and their application; Gear ratios, reduction and
multiplication gear systems, driven and driving gears, idler gears,
mesh patterns; Belts and pulleys, chains and sprockets.
6.10 Control cables 2 5
Types of cables; End fittings, turnbuckles and compensation devices;
Pulleys and cable system components; Bowden cables; Aircraft flexible
control systems.
6.11 Electrical cables and connectors 2 6
Cable types, construction and characteristics; High-tension and coaxial
cables; Crimping; Connector types, pins, plugs, sockets, insulators,
current and voltage rating, coupling, identification codes.