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M7 By Ruhi > 7.3 > Flashcards

7.3 Flashcards

1
Q

Torque wrench continued.

A

M1 = M2 x L1 / L2

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2
Q

Prick punches

A

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

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3
Q

Centre punches.

A

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.

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4
Q

Automatic centre punch

A

Uses a spring.

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5
Q

Starting (taper) punch

A

Used to drive out a pin

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6
Q

Parallel pin punch

A

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

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7
Q

Roll pin punch

A

Used to remove roll pins.

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8
Q

Beryllium-copper , and brass punches.

A

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

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9
Q

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

A

The bur can split and chip

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10
Q

Aviation hand snips. Their colours and meaning

A

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

Green snips
- curve right
Red snips
- curve left.

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11
Q

Prefered TPI of a hacksaw for cutting steel?

A

14 (course)

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12
Q

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

A

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

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13
Q

24 tpi hacksaw, used for and classification?

A

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

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14
Q

32 TPI hacksaw, used for and classification?

A

Fine.
Thin walled tubing and sheet metal

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15
Q

Which way do the teeth point on a hacksaw

A

Away from operator.
In cutting direction.

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16
Q

Junior hacksaw

A

Teeth point towards the operator because the frame is springy.

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17
Q

Rectangular files

A
  • flat or hand
  • rectangular and tapered.
    Hand files only have teeth on one edge.
18
Q

Square files

A

Double cut teeth on all 4 sides.

19
Q

Angle of teeth on single cut files

A

65-85

20
Q

Angle of teeth on double cut files

A

70-80
And
40-50

21
Q

Filing techniques

A

Smooth finish - draw filing
Straight file
Cross file

22
Q

Types of pneumatic drills

A

Pistol grip drills
Straight drills
Right angle drills
45 degree drills

23
Q

Drill terminology

Flute
Margin
Land
Body
Cutting edge

A

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

24
Q

Cutting angle of drills for cutting aluminium or mild steel

A

118 or 135 inclusive.

25
Q

Point angle for drills for cutting plastics

A

30 to 70 degrees

26
Q

Jobber HSS

A

Most common drill bit for everyday use

27
Q

Cobalt drill bits

A

Heat resistant on hard materials

28
Q

Carbide drill bits

A

Most expensive but most durable.

29
Q

Standard / plain countersink tool

A

Impractical as dont know depth

30
Q

Standard countersink with pilot

A

Guides it into material.
Still impractical

31
Q

Micro stop countersink tool

A

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

32
Q

Spot facing

A

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.

33
Q

Reamers

A

Used to smoothen or enlargen holes

34
Q

Thread cutting

A

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

35
Q

What are dogs

A

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

36
Q

How do you test an abrasive wheel

A

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

37
Q

Nut plate drill jig

A

Designed for accurate drilling of rivet holes for anchor nuts.

38
Q

When is a hole finder used

A

When replacing old skin with a new skin

39
Q

When is a rivet shaver used

A

trims mandrel of cherry rivets

40
Q

Metric micrometer

A

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

41
Q

Imperial micrometer

A

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

M7 By Ruhi (9 decks)

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