1) When fitting a hyloks Report

They should be lubricated

Each hylok should be torqued, the torque calculated for each time

The hole should be drilled so it is an interference fit

2) What sort of surface treatment would you find on a magnesium casting? Report

Anodizing

Phosphating

Chromating

3) What is the nominal length of a UNF bolt? Report

Under head to end of the threads

Under head to screw threads (i.e. plain shank).

The length of the threads

4) Where should you not use a nyloc nut? Report

Temperatures above 120 ^oC

Temperatures above 200 ^oC

Temperatures above 250 ^oC

5) What is the nominal screw length?. Report

The overall length of a countersunk screw and the overall length of a bolt (from under the head)

The overall length of a bolt (from under the head) and the overall length of a screw (including the head)

The length of thread for a bolt, overall length for a countersunk screw

6) A unified thread is identified by Report

an 'X' on the head

a raise ring on the head

2 or 3 rings on the head

7) An AN steel bolt is identified by what marking on the head? Report

A 'dash'

14E

An 'X'

8) A British close tolerance bolt is identified by Report

a raised ring on the head

an 'X' on the head

a dropped collar under the head

9) A blind fastener described as external sleeve and internally threaded would be Report

a cherry lock

a rivnut

a jo bolt

10) Studs which have a size larger thread at one end are called Report

stepped studs

shouldered studs

plain studs

11) A bolt with a raised dash is Report

AN standard

close tolerance

Corrosion Resistant Steel

12) A dowel will take what loads? Report

shear

tensile

torsion

13) Dzus Fasteners provide Report

a close tolerance fit

for easy hammering into position

quick release fasteners at inspection panels

14) The initials U.N.C when related to aircraft bolts stands for Report

United National Countersunk

Unified National Coarse

Unified National Centred

15) Capped nuts are used so Report

to prevent leaks from pipe ends

to ensure that it is dry bolted

the part is not over torqued as the bolt touches the captive part first

16) A bolt part number AN25C15 when compared to a bolt part number AN25-15 has Report

a less expensive design and product costs

a higher resistance to corrosion

a higher pitch thread

17) The head marking on a close tolerance BSF bolt is Report

a series of dots on the head face

a raised disk on the head face

a lowered ring under the hexagon

18) In the drawing, what letter represents the nominal length of a BSF bolt? Report

A

B

C

19) A (British) 3/8 inch dia. UNF bolt will have the diameter code letter Report

N

G

J

20) Rivnuts were originally used for Report

securing structural parts

securing rubber de-icing boots

securing cabin floorings

EASA Questions Module 6: Materials Set 9: Bolts, Studs

Set 1: Materials - Ferrous

Set 2: Materials - Ferrous

Set 3: Materials - Non-Ferrous

Set 4: Composite & Non-Metal

Set 5: Wooden Structures

Set 6: Fabric Covering

Set 7: Corrosion

Set 8: Screw Threads

Set 9: Bolts, studs & screws

Set 10: Locking devices

Set 11: Rivets

Set 12: Pipes and Unions

Set 13: Bearings

Set 14: Transmissions

Set 15: Control Cables

Set 16: Electrical Cables