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Test Review > Metulurgy, Shafts, Fits, Lubrication Test > Flashcards

Metulurgy, Shafts, Fits, Lubrication Test Flashcards

1
Q

What is the best definition of metallurgy?

A

Study of structure, properties, extraction and refining of metals

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2
Q

True or false , alloy steel has other elements in it to improve its mechanical properties?

A

True

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3
Q

True or false, aluminum is used because it is light weight and resists corrosion?

A

True

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4
Q

What is the difference between hot and cold rolled steel?

A

Hot rolled steel has the scales still left on the surface after being rolled

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5
Q 
Which of the following is NOT a mechanical property of metals? 
Hardness 
Toughness
Tensile strength 
Softness
A

Softness

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6
Q 
Which of the following is a physical property of metals? 
Colour 
Texture 
Weight 
All of the above
A

All of the above

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7
Q

Stress relieving high carbon steels to 400 to 600 degrees F and letting it cool down is an action of?

A

Tempering

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8
Q

When quenching steel you will use______to help it cool?

Air
Oil
Water or brine
Any of the above

A

Any of the above depending on how quickly it needs to be cooled

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9
Q

The carbon content of low carbon steel(mild)?

A

.02% to .30%

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10
Q

An increase in carbon content will?

A

Increase the hardness

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11
Q

The lower critical temperature of carbon steel is?

A

1333 degrees F

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12
Q

Annealing is?

A

To make the hardened work piece soft again for machining

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13
Q

Tempering steel is to relieve the amount of hardening ________

A

And internal stress by heating the steel to below the lower critical temperature and cooling at any desired rate

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14
Q

Perlite is?

A

Structure of soft steel consisting of layers of ferrite and cementite

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15
Q

Martensite is?

A

A structure of hardened steel consisting of angular needle like crystals

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16
Q

Austenite is?

A

Form of steel at high temperatures (Ferite and cementite dissolve into each other)

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17
Q

Cementite means?

A

A type of iron carbide

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18
Q

Hardness means the ability of metal to?

A

Resist penetration

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19
Q

Toughness means the ability of metal to?

A

Withstand shock of impact

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20
Q

Ductility means the ability of metal to?

A

Be deformed without breaking

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21
Q

Tensile strength means the ability of metal to?

A

Withstand pull without breaking

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22
Q

Pipes and tubes can be produced in two ways________ and __________

A

Rolled and welded

And

Pierced and formed

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23
Q

Cast iron is considered to have the carbon content of?

A

1.7% to 4.5%

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24
Q

What makes stainless steel corrosion resistant?

A

Chromium

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25
Q

Brass is a mixture of?

A

Copper and zinc

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26
Q

Which of the following is not a tool steel sub group?

High speed
Water hardening
Shock resistant
Quench and temper

A

Quench and temper

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27
Q

A light straw Colour when heating up steel during tempering and before cooling would be good for what type of tools?

A

Cutting tools

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28
Q

When testing a piece of steel with a file, you find that the file can barely cut the metal, what Rockwell hardness is the steel?

A

50

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29
Q

In this classification 1141, what does 41 stand for?

A

Carbon content

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30
Q

Hardness testing can be done in different ways, which one of the following is not a true test?

Rockwell
Brinell
File
Torch

A

Torch

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31
Q

MTR stand for ________ (when dealing with steel orders)

A

Mill test reports

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32
Q

The main difference between ferrous and non ferrous metals are?

A

Iron content and magnetism

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33
Q

When identifying metal you can do which of the following?

Look at the colour
Look at the fractured surface
Look at the shape
All of the above?

A

All of the above

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34
Q

When using a spark test to find out the type of material, what spark shape would high speed steel have?

A

Orange Colour with little branching, ends up in ball shaped sparks

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35
Q

How can S shape steel be distinguished f from W shape?

By the flange shape 
Flange width
Web thickness 
Web length 
All of the above
A

Flange shape

Or all of the above

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36
Q

What is the shape destination of L6x6x1

A

Equal leg angle iron

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37
Q

How do you size hollow structural steel?

A

Wall thickness and outside diameter or dimensions

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38
Q

Given identical sized pieces of metal, zinc and die cast aluminum what would the simplest way to identify them be?

A

By weight

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39
Q

Only steel with a carbon content of_______ can be hardened?

A

.2%

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40
Q

True or false, beryllium bronze is a health hazard when it is machined. The particles produced are toxic and must not be inhaled or permitted to touch the skin.

A

True

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41
Q

True or false

Keys are timing devises to fail before any other part in the gear train, shaft, or hub assembly?

A

True

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42
Q

The width of a square or flat key should be about _______ of the shaft diameter?

A

1/4

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43
Q

A Pratt and Whitney key is?

A

Boxed or blind key

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44
Q

A woodruff key?

A

Can be used on a parallel or tapered shaft

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45
Q

A tapered gib head key has a taper of

A

1/8 or 1 and 96

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46
Q

True or false

A saddle key does not require a key seat in the shaft?

A

True

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47
Q

True or false

A feather key can be fixed or sliding?

A

True

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48
Q

If you had a woodruff key with a number 406 the width would be _______ and the diameter would be_________?

A

1/8th in 4 x 32nds

And

3/4 in 6 x 8ths

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49
Q

True or false

Parallel key seats in shafts can be open or tapered?

A

False

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50
Q

The accurate, proper depth of a key seat in the shaft is measured from?

A

The bottom of the shaft to the bottom of the key seat

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51
Q

You should not use a ______ with a cast hub?

A

Tapered key

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52
Q

Key stock is manufactured with low to medium carbon steel (aisi) 1020 to a _______ tolerance

A

Plus (oversized)

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53
Q

Key seats in hubs and attachments will be cut to a depth equal to?

A

Half the key plus the clearance (.005)

54
Q

You can cut keys seats with?

Potable key seat cutter
Hand broaching with an arbour press
Milling machine and windmill
All of the above

A

All of the above

55
Q

When installing keys on shafts and in tapered bushings, you can put anti seize on the keys and taper of the bushing to help stop seizing and damage to the bushing?

True or false

A

False

Only put anti seize on key and shaft

56
Q

When fitting keys, A class _______ fit has a tight fit while a class _____ fit has a clearance fit?

A

2 tight

1 clearance

57
Q

There should always be a clearance .005” on the ______ of the key?

A

Top

58
Q

Set screws are used to lock attachments onto shafts, for positive locking power you should?

Use 2 set screws of similar width to the key

Lubricate threads of screw for maximum thrust

Use knurled cup point set screw for positive positioning

All of the above?

A

All of the above

59
Q

To help facilitate removal of hubs and attachments you should?

Make sure there are not 2 set screws

File a flat where the set screw will sit

Use fox wedges to help removal of gib keys

All of the above

A

All of the above

60
Q

To help facilitate the removal of tapered keys, the gib head should be 1/4” away from the hub to allow for wedges?

True or false

A

True

61
Q

When removing stubborn parallel keys you can use?

Slide hammers

A Dutchman

Locking pliers

All of the above

A

All of the above

62
Q

A journal is the part of the spindle, shaft, or axle that rotates in or on a plain friction bearing?

True of false

A

True

63
Q

Finished shafting is manufactured to wide tolerances and uses finishes like cold rolled, machining, grinding . And polishing?

True or false

A

False

64
Q

C 1045 is precision shafting (precision ground and polished from medium carbon stee) and has a carbon content of ?

A

.45%

65
Q

Hollow shafting is found on shaft mounted reducers?

True or false

A

True

66
Q

Shaft stresses include bending, shear, and ________

A

Torsional shear

67
Q

Whenever there is a shoulder machined into a shaft there should be a _________ at the base of the shoulder to help strengthen the shaft and reduce the stress in this area. It should also allow the bearing to sit up against the _________

A

Fillet

And

Shoulder

68
Q

When checking for ________, you should put the shaft in the lathe centres and set up __________ to measure for it while rotating the shaft 360 degrees?

A

Run out

And

Dial indicators

69
Q

If a bearing fit on a shaft it will creep?

True or false

A

True

70
Q

The ________ bushing does not have a key in the taper of the bushing?

A

QD

71
Q

Tapered sleeves are used for positive bearing location and fit, they have a washer to lock the sleeve onto the shaft?

True or false

A

False the taper locks the bearing to the shaft.

72
Q

Shear pins ________ the machine drive in an overload situation.

A

Disconnect

73
Q

When locking eccentric locking collars onto the bearing and shaft you must rotate the eccentric lock in the direction of the shaft rotation?

True or false

A

True

74
Q

Line shafting has bearings located a maximum distance of _______ between bearings and the fixed bearing should be located as close as possible to the _______

A

8’

And

Drive unit

75
Q

Tapered dowel pins have a taper of ______ per foot

A

1/4

76
Q

Tolerances for dimensioning are the total permissible variation in its size and also determines the fit between mating parts?

True or false

A

True

77
Q

ANSI fits are broken down into 3 groups: running and sliding fits, location fits, and force fits?

True or false

A

True

78
Q

Isometric fits have_______ case letters that represent the hole or bore size and _______ case letters that represent the shaft size

A

Upper

And

Lower

79
Q

When selecting a puller, the ________ determines the puller size?

Reach

Spread

Force required

All of the above

A

All of the above

80
Q

Presses must have proper guarding in place before putting them to use?

True or false

A

True

81
Q

Basic size is the nominal size before __________

A

Adding tolerances

82
Q

If a shaft has a plus tolerance of +.004 and a minus tolerance of -.000 this would be a?

A

Unilateral tolerance

83
Q

Allowance is?

The intentional difference between mating parts at MMC

The minimum clearance (positive allowance) of mating parts

Maximum interference (negative allowance) of mating parts

All of the above

A

All of the above

84
Q

MMC is?

A

Shaft is as big as allowed and hole is as small as allowed

85
Q

Which type of fit can be sliding and press fit?

A

Transition

86
Q

Freeze fitting is what type of fit?

A

Expansion

87
Q

If you used a hydraulic press to push a hub onto a shaft this would be a _______ fit?

A

Force

88
Q

Surface finish is measured in micro inches or micro meters with a toughness grade from N1 to N12

True or false

A

True

89
Q

A revision number to a drawing is enclosed in __________ and is located near the revised dimension?

Triangle

Circle

All of the above

A

All of the above

90
Q

Lubrications main function is to reduce?

A

Friction

91
Q

Sliding friction has?

A

Adhesive wear and asperities touching and welding

92
Q

Rolling friction has?

A

A small contact area and slightly deformed

93
Q

Fluid friction has

A

No metal to metal contact, has electromagnetic bonds

94
Q

Viscosity is?

The resistance to flow in fluid

The most important property of lubricating oil

Measured in centi strokes And SUS

All of the above

A

All of the above

95
Q

Viscosity index identifies the amount of change in the viscosity of a lubricant over a temperature range(40 to 100 degrees c) a high Vi number means?

A

A small change in viscosity

96
Q

An oil wedge is formed by hydrodynamic principles as the shaft rotates?

True or false

A

True

97
Q

Boundary film forms?

At low speeds

At high speeds

At low viscosity

Both 1st and 3rd answers are correct

A

Both 1st and 3rd answers are correct

98
Q

Which is the correct sequence for the formation of an oil wedge?

1: the oil wedge drags the oil into the loaded area
2: shaft journal starts to climb the boundary lubricated area on rotation
3: journal starts to skid as it climbs onto the area of partial lubrication
4: boundary film adheres to the journal beside loaded area.

A

4
2
3
1

99
Q

To have full hydrodynamic lubrication (at running speed) you will need to?

A

Have a RPM and viscosity high enough to form full film lubrication

100
Q

Petroleum based oils:

Do not wear out

Are stable up to 55 degrees C

Cheap compared to other oils

All of the above

A

All of the above

101
Q

Naphtha based oils have the highest wax content?

A

False

102
Q

Synthetic oils

Eliminate wax problems

Made up of atleast 10 chemical bases

Stable up to 250 degrees C

All of the above

A

All of the above

103
Q

The total additive package of base oils is about _____% of the oil?

A

22

104
Q

Which of the statements is NOT true about oxidation?

Rate of oxidation of petroleum oils doubles with every 8 degrees c above 55 degrees c

Produces sludge

Raises viscosity of the oil

Increases the presence of anti oxidants

A

Increases the presence of anti oxidants

105
Q

Rust and corrosion inhibitors work by forming a protective layer on the metal surfaces?

True or false

A

True

106
Q

Load capacity controls with additives such as ______ and ________ help with wear during boundary lubrication?

A

Anti wear

And

E.P

107
Q

E.P additives with sulphur and phosphorus corrode copper and bronze

True or false

A

True

108
Q

When oil wand water are separated they are said to be?

A

Demulsafied

109
Q

A lubrications systems job is to wet the surfaces of the rolling elements and maintain the oil level of?

A

1/3 to 1/2 the way up the lowest rolling element

110
Q

Once the systems do not recycle the oil. Which of the following is not a once through system?

Bottle

Wick feed

Hand oiler

Splash

A

Splash

111
Q

Which of the following systems use capillary action to move the oil?

Bottle

Wick feed

Hand oiler

Splash

A

Wick feed

112
Q

The wick feed and drip feed have ways to adjust the amount of oil being delivered?

True or false

A

True

Different size wicks will determine flow

113
Q

On worm and wheel reducers the?

Worm passes oil to the wheel from the oil bath

Wheel passes the oil to the top of the bearings by having scrapers take it off the wheel

Flingers on the worm pass oil to the worm bearings

All of the above

A

All of the above

114
Q

In recirculating pressure lubrication systems the reservoir helps:

Cool the oil

Aerate the oil

Settle out contaminants

Both 1 and 3 are correct

A

Both 1 and 3 are correct

115
Q

Oil mist lubrication?

Is used for high speed bearings

Can be once through

Is used for high speed roller chain

All of the above

A

All of the above

116
Q

Block lubrication systems have advantages, which is Not one of them?

Single point adjustable flow volume with one pump

Rupture disc feature

Allows easy recycling of the oil to the tank

Modular design of divider blocks

A

Allows easy recycling of oil to the tank

117
Q

An industrial mechanic can check oil by smell, touch and sight. When using sight, you can check the oil for?

Oxidation

Disolved water or air

Metalic particles

All of the above

A

All of the above

118
Q

Oil analysis tells about the?

Types of contamination

Viscosity

Wear Rate and condition of the machine

All of the above

A

All of the above

119
Q

Wear metal in oil samples is measured in parts per million and identifies the wearing components. This procedure is called spectroscopy.

True or false

A

True

120
Q

Partial counts in oil samples tells us the number of particles per million for each of the following particle sizes?

A

2, 5 , 15

121
Q

Grease is made up of a liquid lubricant and a?

Soap

Clay

Thickener

All of the above

A

All of the above

122
Q

Consistency of grease is the degree to which it resists deforming under force and is?

A

Measured using a cone penetration test and given a NLGI number

123
Q

Greases are classified by the type of thickener, NLGI number and?

A

It’s application

124
Q

The base oil held in a thickener is released by the addition of?

A

Pressure

125
Q

Inorganic non-soap thickeners are good in high temperatures and wet conditions?

True or false

A

True

126
Q

A grease with a NLGI grade will be a _______ grease?

A

Hard

127
Q

Low temperature operation greases would require a NLGI of 0 to 1 with a oil viscosity of about _______ Centistrokes?

A

15

128
Q

When dealing with heavy loads with grease, you want to have grease with?

Molybdenum

EP additives

Water

Both 1 and 2 are correct

A

Both 1 and 2 are correct

129
Q

When packing a bearing with grease, you will pack the housing ________ full for high speeds and ________ full for slow speeds?

A

1/3 for high speed

1/2 for low speeds

130
Q

When using pneumatic manual or electric grease guns the tip must be kept clean?

True or false

A

True

131
Q

Dry solid lubricants like graphites are used in pins and bushings where moisture is present?

True or false

A

True

132
Q

Automatic centralized grease systems can lubricate many areas with a metered amount at a given rate or time?

True or false

A

True

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