Modulo 6 Materiales EASA Parte Uno

How do you check a chain for elongation?. Apply a load, measure chain and use 2% max formula to check extension. Hang the chain under its own weight, measure chain and use 2% max formula to check extension.

How do you store a chain?. Lay uncoiled and flat in greaseproof paper. Oiled and coiled in greaseproof paper.

An HT lead is. single core screened. multi core screened.

Two parts of the adhesive process are. wetting and setting. wetting and gripping.

A 14 gauge cable when compared to an 18 gauge cable has. higher current rating. lower current rating.

Types of adhesive joints are. mechanical and specific. mechanical and cemented.

What tests are done on adhesive joints?. peel and shear. impact and peel.

An interconnect cable has what insulation. thinner than airframe cable. thicker than airframe cable.

Epicyclic gears are used on. shafts rotating on the same axis. shafts rotating on offset axis.

What is the effect of heat on a cold cure resin?. Decrease pot life. Increase pot life.

Forming a solution treated rivet gives it 75% of its hardness. What gives it the other 25%?. Put them in a refrigerator. Leave at room temperature for four hours.

What two components of a three part polyester resin are dangerous to mix together directly?. Accelerator and free catalyst. Catalyst and resin.

What is the effect of adding too much hardener to a resin?. Makes the repair more brittle. The resin will not harden.

How many times can clad alloy be treated. 3 times. as many times as required.

What is the largest hole in honeycomb repairable with microballoons. 2.54 cm. 2.54 inches.

If D or DD rivets are not broached in time , or removed from the freezer in time, they. must be re-heat treated before use. can be re-heat treated once then discarded.

How are flexible hoses categorised. by maximum pressure. by length.

A joggle in a removed rivet is indication of what type of partial failure?. shear. compression.

Over extended honeycomb can bend in which direction?. Along the ribbon. In all directions.

The vacuum connections in a fibre glass repair must overlap the. breather mat. peel ply.

The pattern of a gear is the. profile of the gear teeth. mark it leaves on a mating gear.

How do you check a turnbuckle is in safety?. Use the inspection hole or count the threads showing. Ensure that the turnbuckle cannot be turned by hand.

Max temperature of tin coated copper cable?. 105ºC. 200ºC.

The taper of a standard taper pin is. 1 in 48. 1 in 36.

Spherical roller bearings resist what loads?. Large radial and moderate thrust. Large radial but no thrust.

What are the signs of fretting corrosion?. black powder or cocoa staining. intergrannular cracking.

Plug pins are numbered. from the inside out - clockwise. from the inside out - anticlockwise.

What are the rigid pipes on gas turbine engines made from?. stainless steel. aluminium alloy.

Equipment wire. is flexible and suitable for soldering. can be used for interconnect wiring.

In the wiring code shown, what does the number 6 (4th number from the left) represent? 1EF6B22 NMS V. Cable number. Cable size.

An aluminium oxide layer on a conductor will do what when the temperature is increased?. Become thicker. Become thinner.

When not under load where should a pair of gears sit?. In the middle. On the heel.

For a pair of gears to operate properly, they must have. lash and pattern. end play and thrust.

Coil springs are made from. carbon or alloy steels with high working stress. low carbon steels with high working stress.

What is a coaxial cable?. Two or more conductors. A single conductor.

What is the nominal length of a UNF bolt?. Under head to screw threads (i.e. plain shank). Under head to end of the threads.

How is a British al alloy rivet identified?. Natural anodised finish. Violet anodic finish.

What do you do if you forget to add hardener to a composite repair?. Clean all traces of the resin away and start again. Add hardener at the edges and it will cure.

‘X’ on a cable indicates. emergency power. AC power.

A BS rivet made from L36 would be what colour and marking?. Black anodic. Green anodic.

The teeth on the smaller wheel of a bevel gear are called the. heel. toe.

What must you be careful with a hot stamped cable?. Wet arc tracking. Corrosion.

Where should you not use a nyloc nut?. Temperatures above 200ºC. Temperatures above 120ºC.

What is the nominal screw length?. The overall length of a bolt (from under the head) and the overall length of a screw (including the head). The overall length of a countersunk screw and the non-threaded portion of a bolt.

The correct meshing of gears is found on what part of the tooth?. Top. Middle.

What type of gear would be used on a prop reduction gearbox?. Epicyclic. Bevel.

What is the effect of aluminium oxide on aluminium electrical cable?. Provides strength. Insulates.

What is the effect of precipitation heat treatment on aluminium?. It speeds up age hardening process. It delays the age hardening process.

How do you assemble a banjo hose?. Put washer either side of the banjo. Put a washer on the outside of the banjo only.