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B1 Modules > M7 Maintenance Practices 7.3 > Flashcards

M7 Maintenance Practices 7.3 Flashcards

1
Q

Are rulers used for precision work

A

No due to parallax error

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2
Q

What is a radius gauge used for

A

To measure internal and external radii

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3
Q

What type of pencil should not be used on titanium

A

Lead

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4
Q

Why should scribe lines only be cut lines

A

Because scribe lines damage material

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5
Q

What is a ball gauge used for

A

To measure the bore of a hole

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6
Q

How are hammers classified

A

By type and weight with out the handle

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7
Q

What is the face of the hammer

A

The hitting surface

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8
Q

What is the cheek of the hammer

A

The side like the cheek

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9
Q

What is a copper Hyde face hammer used for

A

Shaping metal with out marking material

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10
Q

If removing a rivet what size should the pin punch be

A

Same diameter as the shank of the rivet

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11
Q

What are centre punch angles

A

60° and 90°

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12
Q

What is a 60° centre punch used for

A

Light work

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13
Q

What is a 90° centre punch used for

A

General

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14
Q

What way does a standard hack saw blades teeth face

A

Away from the handle

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15
Q

What way does a junior hack saws teeth face

A

Towards the handle

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16
Q

What is the offsetting of the teeth of a hack saw blade called

A

The KERF and is used to prevent jamming during use

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17
Q

How many teeth do corse hack saw blades have

A

14 tpi and used for cutting sort material

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18
Q

How many teeth do medium hack saw blades have

A

22 teeth

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19
Q

How many teeth do fine hack saw blades have

A

32 teeth and used for cutting hard material

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20
Q

How many teeth should be in contact with work at all times

A

2

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21
Q

What type of work would a single cut file be used for

A

Soft material

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22
Q

What type of work would a double cut file be used for

A

General

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23
Q

What type of work would a dreadnaught file be used for

A

Heavy work

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24
Q

What type of work would a rasp file be used for

A

Wood/leather or soft material

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25
Q

Why is draw filing used

A

To obtain a very fine finish

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26
Q

What is the point of a drill

A

The lip or cutting edge

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27
Q

What is the land of a drill

A

Plain point between flutes

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28
Q

What is the shank of a drill

A

The portion that goes into the chuck and where all information is kept

29
Q

What drills are most common

A

Jobber drills

30
Q

What type of drills are used in areas with limited access

A

Extension drills and they should always be used with a guard

31
Q

What is the standard lip angle of a drill

A

59° or 118° inclusive

32
Q

For drills over 3” diameter what should drill speed be limited to

A

6000rpm

33
Q

When should flat offset or port chop drill be used

A

Hard to reach area

34
Q

When tightening a drill in a chuck how many holes at least should be tightened

A

At least 2

35
Q

Why is de burring used

A

To eliminate stress raisers

36
Q

When drilling hard material such as titanium, what rules must be followed

A

Low speed high feed

37
Q

What are “Limits”

A

The maximum and minimum permanent sizes of a component

38
Q

What is “Tolerance”

A

The difference between the maximum and the minimum

39
Q

What is a clearance fit

A

It will go straight in

40
Q

What is an interference fit

A

Pin bigger than hole

41
Q

What is transition fit

A

Can either be too big or too small

42
Q

What are the two system of fits

A
  • Hole basis system
  • Shaft basis system
43
Q

Which of the two system of fits are preferred

A

Hole basis system

44
Q

In relation to swarf, how does a right hand reamer work

A

The same as a regular drill. The swarf comes out of the flutes backwards

45
Q

With regards to swarf, how does a left hand reamer work

A

Pushes swarf forward into the work

46
Q

What is important face to remember about reaming

A

The reamer should always be rotated in the direction of the cut even when removing the reamer from the work

47
Q

When would an expanding reamer be used

A

Only when a normal reamer of the same size is unavailable

48
Q

How are metric and imperial reamers graded

A

Metric - 1:50
Imperial - 1:48

49
Q

What is important to remember about the metric reamer

A

Size written on the shank but refers to the smallest part of the taper

50
Q

What is important to remember about the imperial reamer

A

Details written on the shank but refers to the largest diameter of the taper

51
Q

What is the regular countersink size

A

100°

52
Q

Why is countersinking used

A

For aerodynamic smoothness

53
Q

What is the disadvantage of the plain and pilot countersink tool

A

No depth guidance

54
Q

What is the preferred method of countersinking

A

By using a micro stop

55
Q

What are UNF threads

A

60°

56
Q

What are BA threads

A

47.5°

57
Q

Anything below 1/4” given numbers 0-12

A
58
Q

How are screws threads per inch measured

A

A screw pitch gauge

59
Q

When cutting rods or dowels to fit into a hole should it be cut to major or minor diameter of the thread

A

Major

60
Q

How many types of tap are normally made for each size

A

3

Taper tap
Second tap
Plug tap

61
Q

What’s the disadvantage of the deflecting beam torque wrench

A

Parallax error - can’t really see the torque

62
Q

What is the equation for scale reading

A

Specific torque x L
LxA

63
Q

When are pre loaded indicating torque washers used

A

Restricted access, they are also supplied in different collars

64
Q

What is the lead of a metric micrometer

A

0.5mm one complete rotation

65
Q

What is the lead of an imperial micrometer

A

1/10” one complete rotation

66
Q

Why should you never use the side of an abrasive wheel

A

To prevent weakening

67
Q

When setting up a tool holder on an abrasive wheel, how big should the gap be between the tool and the wheel

A

As small as possible

68
Q

Why is lubrication generally used

A
  • To prevent heat build up
  • improve efficiency
  • prolong component life
69
Q

When is a milivolt drop test carried out

A

To measure resistance in a poor connection or loose terminal

B1 Modules (19 decks)

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