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Machinist Period 4 2019 Cash > Red Seal Prep > Flashcards

Red Seal Prep Flashcards

General overview period 1-4

1
Q

When cutting on a lathe what are some of the remedies for a built-up edge

A

Use coolant
Increase cutting speed
Increase DOC and feed rate

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2
Q

The ideal characteristics for your cutting tool on a lathe would be

A

Hard
Tough
Shock resistant
Chemically inert

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3
Q

What are the remedies when working on a lathe for Crater wear on your cutting tool

A

Use a grade with more wear resistance
Lower cutting speed
Reduce feed rate

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4
Q

What are the advantages and disadvantages of positive rake angles on inserts

A

Advantages
Easier cutting action for soft metals like aluminum
Less horsepower required to run cutter

Disadvantages
Only have edges on one side of insert

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5
Q

What are some of the advantages and disadvantages of a negative rake angle on cutting inserts

A

Advantages
Machine harder materials and interrupted cuts
Inserts have twice as many edges

Disadvantages
More horsepower required

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6
Q

The coordinate system that is based on two or more axes perpendicularly intersecting each other at the point of origin is the

A

Cartesian coordinate system

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7
Q

The resolution of a CNC machine is defined as

A

The smallest slide movement the machine control can identify and act upon

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8
Q

Which of the following does not contain a computer

NC
CNC
DNC
CAM
CAPP
A

NC

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9
Q

A bit is used to

A

Turn on or off parameters

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10
Q

An example of a word in word address programming is

G
X 0
3.548
Go To

A

X 0

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11
Q

During rapid Traverse, the operator and programmer have to

A

Ensure safe movements to avoid machine crashes

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12
Q

Preparatory codes of the same _____ can’t appear on the same block

A

Group

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13
Q

How many miscellaneous codes will the Haas machine except in one block

A

1

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14
Q

What is tolerance

A

Total permissible variation in size of a dimension, intentional difference in size of mating parts

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15
Q

What can you do if you were cutting hard materials and your cutter keeps breaking

A

Increase the negative rake which helps protect the tool when Machining hard materials and interrupted cuts

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16
Q

The safest way to remove chips from machine is to use

A

A brush

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17
Q

A hand hacksaw blade for sawing thin wall tubing should have a pitch of

A

32 teeth per inch

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18
Q

The hacksaw blade will bind and break when

A

It is dull

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19
Q

The gauge used to check internal tapers is called

A

Plug gauge

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20
Q

Checking the pitch of a thread can be done most accurately with the

A

Pitch gauge

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21
Q

A reamer is used to produce ______ and ______ holes

A

Smooth, accurate

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22
Q

The amount of metal left for removal by a hand reamer is generally

A

5 thou

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23
Q

A hand reamer has a taper on the end for the purpose of

A

Starting it

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24
Q

The most convenient steel rule for sitting inside calipers is the

A

Hook rule

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25
Q

To have a dimension with a bilateral tolerance you must have

A

A dimension with both plus something and minus something

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26
Q

If you machine shaft to 1.5” plus .000, minus .004 and a sleeve to 1.502 plus/minus .001 the resulting fit would be

A

Clearance fit

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27
Q

Adjustable parallels can be used to _____ and to ______

A

Support work, make measurements

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28
Q

Angles and tapers are most accurately measured with a

A

Sine bar and gauge blocks

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29
Q

Positive rake cutting:

A

Allows chips to flow freely away from The Cutting Edge

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30
Q

An American Standard tool holder supports the tool at an angle of _____ and this angle on the tool bit is called ______

A

15-20 degrees

Back rake

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31
Q

When grinding a turning tools the side relief angle must be greater than what

A

8 degrees

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32
Q

The term tempering means

heating above lower critical temperature and quenching in proper medium
Reheating hardened steel to desired temperature below lower critical temperature
Heating metal to just above its upper critical point, followed by slow Cooling in furnace
Heating the steel to just above its upper critical point and Cooling in still air

A

Reheating hardened steel to desire temperature below lower critical temperature

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33
Q

The hardening colour for carbon tool steel is

A

Cherry red

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34
Q

List three quenching media used in heat treatments

A

Water, oil, air

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35
Q

When using the tempering colours, a brown colour would indicate an approximate temperature of

450 Fahrenheit
490 Fahrenheit
530 Fahrenheit
590 Fahrenheit

A

490 Fahrenheit

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36
Q

Drilling machines with more than one drilling head and a single table are called

A

Gang drills

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37
Q

The advantage of a radial drilling machine is that the _____ can be ______ over the ______

A

Drilling head, positioned, workpiece

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38
Q

Excessive feed rates on a drilling operation would most likely cause what

A

Breakage of the drill point

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39
Q

As a Twist drill begins to break through the workpiece you should what

A

Reduce the feed

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40
Q

The feed rate for reaming as compared to drilling is usually what

A

Two to three times the feed rate for the drilling

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41
Q

The Cutting speed for reaming as compared to drilling a given material is about what

A

1/2 to 2/3

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42
Q

The machine reamer that cuts only at the chamfered end is called a

A

Rose chucking

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43
Q

In general what are the two types of power saws

A

Vertical and horizontal

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44
Q

A minimum of _____ teeth should be kept in contact with the workpiece at all times

A

2-3

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45
Q

The most common types of set on a metal cutting bandsaw blade are the _____ set and the _____ set

A

Straight and raker

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46
Q

List two safety precautions for the power hacksaw

A

Solidly mounted workpiece, and guards

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47
Q

List three materials from which band saw blades are made from

A

High speed steel, carbon alloy, tungsten carbide

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48
Q

The most common types of set on a metal cutting bandsaw blade are the _____ set and the _____ set

A

Straight and raker

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49
Q

The pitch of a bandsaw blade having 10 teeth per inch length is equal to

A

.1

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50
Q

A newly welded bandsaw blade requires

A

Annealing of the welded area

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51
Q

Kerf of the saw blade refers to the

A

Width of cut made by a saw blade

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52
Q

Band velocity on a bandsaw is expressed in

A

Surface feet per minute

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53
Q

In order to stop the blade on a vertical band saw from running off the upper wheel

Adjust the upper saw blade guide
Adjust the lower saw blade guide
Adjust the tilt handwheel
Adjust the blade tension

A

Adjust the Tilt handwheel

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54
Q

The Quick Change gearbox on the engine lathe is used to

A

Change speeds and feeds

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55
Q

The included Point angle of a lathe Center is

A

60 degrees

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56
Q

Setting a lathe tool above the Centerline of the lathe will reduce the effective what

A

End clearance

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57
Q

A thread cutting tool is set 90 degrees to the workpiece axis with the help of a what

A

Centre gauge

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58
Q

The safest way to file in a lathe is Left-Handed. T or F?

A

True

59
Q

To align lathe centres for accurate cylindrical turning you

A

Mount a test bar between centres, adjust tailstock with set over screws, and test with a dial indicator

60
Q

If when turning work held between centres, the job tapers smaller on the headstock end you would

A

Adjust the tailstock towards you

61
Q

When Machining between centres and the work is reverse to machine the opposite end, if the two diameters are not concentric it indicates what

A

The headstock Center does not run true

62
Q

Which of the following would give the tightest fitting bolt - nut combination

1A AND 1B
3A AND 1B
3A AND 3B
2A AND 3B
2A AND 2B
A

3A AND 3B

63
Q

On which of the following do you normally find two thread angles

Metric thread 
 American pipe thread 
 Buttress thread 
 API thread 
 Multiple start thread
A

Buttress thread

64
Q

Identify thread designation

3/4 - 10 UN C - 2 A

A

Major diameter, pitch, thread Forum, series, fit, external

65
Q

Because the measurement of the pitch diameter is least affected by an error in the thread angle, the best size wire is one that contacts the thread at

A

Pitch line

66
Q

When using the compound rest method of cutting multiple threads, The Machinist moves the compound, for each thread, a distance that is

A

Equal to the pitch of the thread

67
Q

A disadvantage of feeding a Threading tool with the cross slide is that

A

The Cutting pressure is on both sides of the tool

68
Q

The movement of a compound rest set at 30 degrees to the Cross slide axis for a 3/4 - 10 UNC 2A thread is

A

.071

69
Q

The distance a nut advances on a screw in one revolution is the

A

Lead

70
Q

Which of the following is not a method or tool for measuring thread for size

A

Thread snap gauge

71
Q

Multiple threads are used to give

A

Speed

72
Q

The minimum depth of an undercut for unified thread should be equal to

A

The root diameter

73
Q

List three types of knee and column Milling machines

A

Plain horizontal, Universal horizontal, vertical

74
Q

List three types of manufacturing Milling machines

A

Plane, plane knee and column, Tracer controlled

75
Q

Name eight operations which can be performed on a milling machine

A

Facing, straddle, gang, sawing and slitting, indexing, drilling, rack Milling, rotary table

76
Q

What Milling cutter is required to produce a blind keyway in the centre of a shaft

A

End Mill

77
Q

When Milling a spiral reamer which method of indexing is used

A

Simple indexing

78
Q

In order to revolve the spindle one complete Revolution on most dividing or indexing heads, the index crank must be revolved

A

40 times

79
Q

The lead of a helix is

A

Distance required to make one complete turn

80
Q

One complete revolution of the index crank revolves the work through an angle of

A

9 degrees

81
Q

The gear is required for differential indexing are mounted between the ______ and the ______

A

Spindle and the indexing plate

82
Q

The best cutter for fluting reamers is a

A

Double angle cutter

83
Q

The radial face of the tooth of a reamer is located

A

1/64 of an inch before the centre

84
Q

Which of the following Cutters is not suitable for helical Milling

single cutter
side and face cutter
double angle cutter
helical cutter

A

Side and face cutter

85
Q

When Milling a helical Groove, at the end of each cut, shut off the feed and

A

Lower the table

86
Q

The arbour key should

A

Be sufficiently long to extend into the bushings

87
Q

The cutter should be mounted

A

As close to the column as is practical

88
Q

When using a helical tooth cutter place it on the arbour so that the work pressure tends to force the cutter towards the machine column. T or F

A

True

89
Q

The up feed method of Milling gives a better work finish and the Cutters retain their sharpness. T or F

A

False

90
Q

A set of gear Cutters consist of ______ cutters

A

8

91
Q

The size of a horizontal boring Mill is judged by the

A

Diameter of the spindle bore

92
Q

A boring Mill that has a table that travels in a longitudinal and transverse direction is called

A

Table type

93
Q

Which of the following operations is rarely performed on a horizontal boring Mills

end milling
gang milling
face milling
single point cutting tool

A

Gang Milling

94
Q

Which of the following operations would be most difficult to perform on a horizontal boring Mill

External threading
Internal threading
External taper turning
Internal taper boring

A

External threading

95
Q

The size of a vertical boring Mill is determined by the

A

The size of the table

96
Q

In general what kind of wheels are used on hard materials

A

Soft

97
Q

Aluminum oxide wheels are used for grinding

A

Steel

98
Q

What will cause the work to burn and crack even when speed and coolant are correct

A

Dull stone, too hard

99
Q

A grinding wheel is sized in order of what four things

A

Type, OD, width, ID

100
Q

Which of the following is a factor that makes grinding an important Machining process

grinding wheels remove metal faster than milling cutters
grinding wheels remove metal from hardened work pieces
grinding machines are simple to operate
grinding machines require less power than milling machines

A

Grinding wheels remove metal from hardened work pieces

101
Q

Which of the following machines is a Precision grinder

Bench grinder
Swing frame grinder
Flexible shaft grinder
Internal grinder

A

Internal grinder

102
Q

When a pedestal grinding wheel vibrates excessively, it is an indication of what

A

Out of balance

103
Q

To ring test a grinding wheel is to what

A

Check for cracks

104
Q

When ring tested a usable wheel will give a

A

Clear ring

105
Q

Blotters placed on each side of the grinding wheel are made of

A

Paper

106
Q

To ensure the safe operation of a grinding machine

A

The wheels should be sharpened and dressed as often as is needed

107
Q

What is the chief function of a surface grinder

A

To produce a flat surface

108
Q

Which cylindrical grinding machine is best suited for mass production

A

Centerless grinding

109
Q

The cylindrical grinder is generally used to

A

Finish round objects

110
Q

The part of the cylindrical grinder that supports the grinding wheel is called the

A

Wheel head

111
Q

Trip dogs on cylindrical grinding machines are used to

A

Change the direction of travel

112
Q

When a grinding wheel leaves chatter marks on the work the only possible reason is that the wheel is out of round. True or false

A

False

113
Q

Which of the following machines can be used for internal grinding

Plane grinding machine
Universal grinding machine
Roll grinder
Piston grinder

A

Universal grinding machine

114
Q

Which of the following terms does not apply to internal grinding

Blind hole grinding
Through feed grinding
Form grinding
Taper grinding

A

Through feed grinding

115
Q

When changing work pieces in a 4 jaw Chuck it is good practice to loosen

A

Three Jaws

116
Q

Unbalanced Wheels cause

A

Chatter

117
Q

How is a grinding wheel expected for cracks before it is installed on a Surface grinder

A

Ring testing with a mallet

118
Q

What kind of flanges should be used to hold the wheel

A

Recessed

119
Q

You disconnect the worm and worm wheel for which method of indexing

A

Direct

120
Q

A direct index plate has 24 slots, what is the angular distance between each slot

A

15°

121
Q

When simple indexing, one complete turn of the index crank rotates the spindle or work piece how many degrees

A

9°

122
Q

2 simple index a workpiece 1/8 of a turn using simple indexing, you use an indexing plate with

24 holes
12 holes
21 holes
49 holes

A

24 holes

123
Q

The most basic dividing mechanism is the

A

Direct dividing head

124
Q

What must a milling machine be equipped with____ when your climb Milling

A

Backlash Eliminator

125
Q

When straddle Milling make sure the Cutters are

A

Spaced a specified distance apart

126
Q

The first step when cutting a t slot on a dovetail is to

A

Machine a clearance slot

127
Q

When using a slitting saw

Keep your hand on the feed lever during the cut
Do not use an Arbor key
Use a feed rate that is 1/8 to 1/4 the normal feed rate
All of the above

A

All of the above

128
Q

The type of End Mill to use when milling a key seat right up to the shoulder is a

A

2 flute End Mill

129
Q

You perform drilling on a milling machine just before

A

Precision boring

130
Q

You swivel the table of a milling machine for

A

Gashing

131
Q

When hopping on a milling machine the workpiece rotates freely between centres. T or F

A

True

132
Q

You would use a slot Milling attachment to Mill an external keyway

A

False

133
Q

You find key seats in

A shaft
A hub
A door knob
An Arbor Milling cutter

A

A shaft

134
Q

What process is to heat steel to just above its lower critical temperature, hold for long enough for the structure to change to austenite then quench the steel quickly enough that it turns into martensite instead of perlite

A

Hardening

135
Q

What must you always do to hardened steel

A

Temper it to remove stresses and restore toughness

136
Q

What process is taking steel and reheating it to a temperature somewhere below its lower critical temperature and then allow it to cool slowly

A

Tempering

137
Q

What process do you heat the steel to just above its upper critical temperature, allow it to soak so that the temperature is consistent and then allow it to cool very slowly

A

Full annealing which makes hardened steel soft again

138
Q

What process is to heat the steel to above its upper critical temperature and then allowed to cool slowly and still air

A

Normalizing which improves the grain structure of the steel

139
Q

What are the processes of heat treatment of Steel

A

Hardening, tempering, full annealing, normalizing, and I guess case hardening if you want to include that s***

140
Q

What are the six colour changes for heated Steel

A 
Light straw
 Dark straw 
 Brown
 Purple 
 Violet 
 Dark blue
141
Q

The milling machine attachment that changes rotary to reciprocating motion is the

A

Slotting attachment

142
Q

The endmill that can always be used for plunge milling into solid material is the

A

2 fluted end mill

143
Q

The thread angle of an ACME thread is

A

29 degrees

Machinist Period 4 2019 Cash (24 decks)

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