7.3

Question 1

Torque wrench continued.

Answer 1

M1 = M2 x L1 / L2

Question 2

Prick punches

Answer 2

Sharp tip ground to an angle of 30 or 60 degrees.
Eye protection must be worn.
Used when marking up a piece of metal.

Question 3

Centre punches.

Answer 3

Ground to 60 degrees for light work or 90 degrees for general work.
Generally made of hardened steel but can be copper or brass.
Must be handled with care to not distort the surrounding metal.

Question 4

Automatic centre punch

Answer 4

Uses a spring.

Question 5

Starting (taper) punch

Answer 5

Used to drive out a pin

Question 6

Parallel pin punch

Answer 6

Have a parallel shank.
Diameter sized to match rivet shanks.
Structure must be supported on both sides to prevent bounce back.

Question 7

Roll pin punch

Answer 7

Used to remove roll pins.

Question 8

Beryllium-copper , and brass punches.

Answer 8

Used where there must not be a risk of sparking, e.g. fuel tanks.

Question 9

Why must eye protection be worn when using. A punch?

Answer 9

The bur can split and chip

Question 10

Aviation hand snips. Their colours and meaning

Answer 10

Straight snips
- cutting straight lines
- cutting outside of a curve.
- yellow

Green snips
- curve right
Red snips
- curve left.

Question 11

Prefered TPI of a hacksaw for cutting steel?

Answer 11

14 (course)

Question 12

18 tpi hacksaw, what are they used on and how are they classified.

Answer 12

Course
Prefered for solid state aluminium, bearing metal, tool steel, cast iron.

Question 13

24 tpi hacksaw, used for and classification?

Answer 13

Medium
Thick walled tubing, pipe , brass , copper, angle iron.

Question 14

32 TPI hacksaw, used for and classification?

Answer 14

Fine.
Thin walled tubing and sheet metal

Question 15

Which way do the teeth point on a hacksaw

Answer 15

Away from operator.
In cutting direction.

Question 16

Junior hacksaw

Answer 16

Teeth point towards the operator because the frame is springy.

Question 17

Rectangular files

Answer 17

• flat or hand
• rectangular and tapered.
  Hand files only have teeth on one edge.

Question 18

Square files

Answer 18

Double cut teeth on all 4 sides.

Question 19

Angle of teeth on single cut files

Answer 19

65-85

Question 20

Angle of teeth on double cut files

Answer 20

70-80
And
40-50

Question 21

Filing techniques

Answer 21

Smooth finish - draw filing
Straight file
Cross file

Question 22

Types of pneumatic drills

Answer 22

Pistol grip drills
Straight drills
Right angle drills
45 degree drills

Question 23

Drill terminology

Flute
Margin
Land
Body
Cutting edge

Answer 23

Flute = removal of scarf and allows cutting fluid

Margin = keeps drill aligned during operation, determines size of drill.

Land = provides torsional strength
Body = between the point and shank

Question 24

Cutting angle of drills for cutting aluminium or mild steel

Answer 24

118 or 135 inclusive.

Question 25

Point angle for drills for cutting plastics

Answer 25

30 to 70 degrees

Question 26

Jobber HSS

Answer 26

Most common drill bit for everyday use

Question 27

Cobalt drill bits

Answer 27

Heat resistant on hard materials

Question 28

Carbide drill bits

Answer 28

Most expensive but most durable.

Question 29

Standard / plain countersink tool

Answer 29

Impractical as dont know depth

Question 30

Standard countersink with pilot

Answer 30

Guides it into material. Still impractical

Question 31

Micro stop countersink tool

Answer 31

Controls depth. Keeps cutter perpendicular to surface. Cutters available for 82, 100,120 degree rivet types.

Question 32

Spot facing

Answer 32

Method used for cutting a flat area or seat for a bolt head or nut on a contoured or uneven surface. Done on a pillar drill where possible.

Question 33

Reamers

Answer 33

Used to smoothen or enlargen holes

Question 34

Thread cutting

Answer 34

Taper tap to start, followed by plug tap , then bottoming tap.

Question 35

What are dogs

Answer 35

Dogs are used to hold an oddly shaped piece of work.

Question 36

How do you test an abrasive wheel

Answer 36

Tap gently with a non-metallic object, should give a clear metallic ring.

Question 37

Nut plate drill jig

Answer 37

Designed for accurate drilling of rivet holes for anchor nuts.

Question 38

When is a hole finder used

Answer 38

When replacing old skin with a new skin

Question 39

When is a rivet shaver used

Answer 39

trims mandrel of cherry rivets

Question 40

Metric micrometer

Answer 40

Pitch of thread is 0.5mm. Rim of thimble divided into 50 increments. = 0.01mm

Question 41

Imperial micrometer

Answer 41

Pitch of thread is 40tpi. One revolution of thimble advances spindle 0.025 inch Lines on thimble = 0.001 inch

Question 42

type 1 torque wrenches

Answer 42

Indicates the torque via a mechanical scale or dial or electrically, so it is up to the user to decide when adequate torque has been applied.

Question 43

Type two torque wrenches

Answer 43

Fixed or adjustable to. A preset torque value, once the value is reached it is indicated by feel or by audible or visible indication.