1) The pitch of a screw thread is Report

crest to root

crest to crest.

2 * crest to root

2) A single start thread the lead is Report

? * pitch

1 * pitch

2 * pitch

3) A wire thread insert tap is Report

supplied in a fitting kit

slightly larger than the hole

slightly smaller than the hole

4) Multi-start threads Report

increase the lead and decrease the pitch

increase the lead without increasing the pitch

increase the lead and the pitch

5) Buttress threads are used Report

to transmit power on one direction

to transmit power in both directions

on nuts and bolts

6) The lead on a single start thread is Report

1/2 the pitch

1 * pitch

2 * pitch

7) Colour identification of an aluminium rivet is Report

black

violet

green

8) For a wire insert thread repair, the hole is tapped using Report

the same size

the next size up

a special tap supplied with the kit

9) Most commonly used thread form in aviation is Report

V thread

buttress

round thread

10) Pitch of a screw thread is defined as the Report

distance from the centre of one crest to the next

difference between major diameter and minor diameter

distance between the crest and the root of the thread

11) The angle of a screw thread is Report

the inclusive angle of the thread sides

half the inclusive angle of the thread sides

the distance the thread moves in one turn

12) The tang of a thread insert Report

may left it in the insert after installation

is removed with a hammer and a punch

must be removed

13) A thread insert may be removed by Report

a blade removal tool

a hammer and punch

a pre-wind insertion tool

14) A metric screw thread angle is Report

7^o

57^o

60^o

15) Which thread type has the better vibration resistance? Report

A fine thread

A course thread

Courseness or fineness of thread has no bearing on the vibration resistance

16) Which of the following thread designations is most fatigue resistant? Report

UNF

UNC

UNJF

17) Which thread type has a 55^o angle? Report

Metric

Whitworth

UNF

EASA Questions Module 6: Materials Set 8: Screw Threads

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