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M7 > 7.3 > Flashcards

7.3 Flashcards

1
Q

When can you scribe something

A

For cut lines only

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2
Q

What are hammers classified by

A

Weight and type (with handle removed)

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3
Q

What should you check before using a claw hammer

A

That the head is set using attached to the handle

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4
Q

What size centre punches are there

A

60% for light work
90% for general indentation

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5
Q

What are the four types of hammers

A

Ball pein
Cross and Straight pien
Claw hammer
Copper and hide hammer

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6
Q

What are the 7 parts of a hammer

A

Neck
Face
Bell
Claw
Cheek
Handle
Grip

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7
Q

How should the teeth of a hacksaw lay

A

For a normal hacksaw - teeth away from you
For junior - teeth facing the handle

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8
Q

What is the kerf and why do we have it

A

The teeth are set alternately left and right to produce the kerf
Which reduces jamming as makes a clearance

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9
Q

What are the three types of blades we can have on a hacksaw

A

Coarse
Medium
Fine

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10
Q

When would we use a coarse hacksaw

A

For soft materials

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11
Q

When would we use a medium hacksaw

A

For normal general

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12
Q

When would we use a fine hacksaw

A

For hard materials/sheet metal/ cut hollows or tubing

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13
Q

What do you use a round file for

A

For small radii

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14
Q

What do you use a half round file for

A

For filling medium or large radii

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15
Q

What do you use a square file for

A

For filing keyways

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16
Q

What do you use to clean files

A

Scratch card/file brush
Or alternatively, chalk, oil or white spirit

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17
Q

What is the purpose of draw filling

A

Very fine finishes

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18
Q

What is the purpose of a flute of a drill bit

A

Allows removals of the chips/swarf
Allows cutting fluid to reach the cutting lips

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19
Q

When should you use an extension drill and what needs to be paired with it

A

Only use if absolutely necessary
Use a drill guard

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20
Q

What are the general angles for a drill

A

Inclusive angle = 118 degrees
Cutting lip = 59 degrees

21
Q

What are the cutting angles for a drill bit when used on hard materials

A

140 degrees
70 degree cutting lip

22
Q

What are the cutting angles for a drill bit when used on soft materials

A

80 degrees
Cutting angle 40 degrees

23
Q

For a drill over 3” what needs to be limited

A

Speed to 6000RPM

24
Q

How should you tighten a chuck

A

By tightening at least 2 with a chuck key

25
Q

What drill sizes need a pilot

A

Anything above 3.2mm needs to be piloted

26
Q

What does deburring prevent

A

Stress razors

27
Q

What is a limit

A

The minimum and maximum permanent sizes of a component

28
Q

What is a tolerance

A

The difference between the minimum and maximum limits

29
Q

What are the three ISO system of fits

A

Clearance
Transition
Interference

30
Q

What is the system of fits and which one is preferred

A

Hole basis system - preferred
Shaft basis system

31
Q

What does a right hand twist reamer do

A

Directs the removal of the chips like a normal twist drill (swarf comes up)

32
Q

What does a left hand reamer do

A

Twists the chips is the advance direction (down)

33
Q

When should you use an expansion reamer

A

Only when a parallel reamer of correct size is unavailable

34
Q

What are the sizes of tapered reamers for metric and imperial

A

Metric - 1:50
Imperial - 1:48

35
Q

What size is etched on metric and imperial reamer

A

Metric - small diameter
Imperial - large diameter

36
Q

What is the most common countersink angle

A

100 degrees

37
Q

When do we dimple

A

If the sheet metal is too thin SRM will specify

38
Q

What are the three taps and in what order do you tap them in

A

Taper
Intermediate
Bottoming/plug

39
Q

What is the advantage of a bottoming/plug tap

A

Has no taper so can cut full thread to bottom of a blind thread

40
Q

What should you thread last a tap(internal) or die (external)

A

Die comes last

41
Q

What are the three torque wren these

A

Deflecting beam
Torsion bar
Toggle

42
Q

What is the problem with a deflecting beam and torsion bar

A

Parallax error, you may read the scale wrong

43
Q

What should you always do before using a torque wrentcn

A

Use a torque analyser to check the torque is set correctly

44
Q

What is the formula when using an extension torque

A

Specified torque x L / L x A

45
Q

What should you use if access if restricted and you cannot use a torque wrench

A

Pre loaded washer

46
Q

What is a ratchet stop used for on a micrometer

A

To prevent over tightening

47
Q

For metric what is one full rotation equal to on a micrometer

A

0.5mm

48
Q

For impetial what is one full rotation equal to on a micrometer

A

1/40 or 0.025”

49
Q

How are micrometers calibarated

A

By using a gauge block

M7 (15 decks)

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