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Mechanics > 1st Mechanics Final > Flashcards

1st Mechanics Final Flashcards

1
Q

What are the 2 common types of lubrication?

A

1) Grease
2) Oil

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2
Q

What lubricants should be used in high temperature?

A

1) Synthetic
2) Dry

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3
Q

2 characteristics of linear bearings?

A

1) Force of motion on one plane
2) Fixed support

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4
Q

Keeps good shit in and bad shit out?

A

Seals

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5
Q

What are the 2 types of seals?

A

1) Contact
2) Non-contact

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6
Q

T or F:
Contact bearings are more suitable for high speed applications?

A

False, non contact

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7
Q

4 types of mounted bearings?

A

1) Pillow block
2) Flanged cartridge
3) Cylindrical cartridge
4) Take-up

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8
Q

What type of bearing has a shaft that passes through the machine frame at a 90° angle?

A

Flanged cartridge

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9
Q

Which type of mounted bearing is used for adjustments?

A

Take-up

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10
Q

2 ways to mount ball bearings?

A

1) Set screw
2) Locking collar

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11
Q

What type of bearing is used for angular Misalignment?

A

Rod-end bearings

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12
Q

What are 2 characteristics of cam-type & load following bearings?

A

1) Accommodates elliptical or symmetrical motion
2) Can be made up of any plain bearing or rolling element

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13
Q

What are the 3 groups of drive belts?

A

1) V or wedge
2) Flat
3) Timing or synchronous

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14
Q

V or wedge style is driven by a _____?

A

Sheave

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15
Q

Toothed or synchronous is driven by a _____?

A

Sprocket

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16
Q

Flat belt is driven on a _____ style pulley

A

Drum

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17
Q

What is the biggest advantage to drive belts?

A

They act as a clutch

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18
Q

What’s the biggest advantage of flat belts?

A

It’s flexibility

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19
Q

What are the 2 construction types for V or wedge belts?

A

1) Raw edge
2) Envelope

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20
Q

How do you identify raw edge from envelope?

A

Raw edge has a white line on the edge of the belt

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21
Q

What are the 4 layers of a belt?

A

1) Tensile cord
2) insulation rubber
3) Backing fabric
4) Cushion rubber

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22
Q

Which V-belts sits flush with the sheave?

A

Wedge

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23
Q

Which V-belt sits a little higher than the sheave?

24
Q

Notches in the cushion rubber means the belt is what?

25
What is an advantage to a cogged belt?
It's flexibility
26
What letter designates that a belt is cogged?
X
27
What letter designates a wedge belt?
V
28
What letters designate a classical V-belts?
A, B, C, D
29
Which V belt is a light duty belt?
Fractional HP
30
What letters designate a fractional HP belt?
2L, 3L, 4L & 5L
31
What type of belt eliminates rollover?
Banded belt
32
What belt relies on positive tooth engagement?
Timing or synchronous belt
33
T or F: Chain drives operate under tension.
True
34
What's the pin to pin distance on a chain called?
Pitch
35
What 2 things connect chain?
1) Master link 2) Half link
36
What 2 things can be used to prevent the master link or half link from coming loose?
1) Cotter pin 2) Spring clip
37
T or F: It is necessary to periodically lubricate self-lube roller chain?
False
38
What increases on heavy series chain to accommodate it's increased load capacity?
It's width
39
What letter designates heavy series chain?
H
40
T or F: The pitch stays the same on heavy or super series chain?
True
41
What number designates stainless chain?
300
42
What letter designates nickel/zinc chain?
600
43
What type of chain is used when traveling long distance between sprockets?
Double pitch roller chain
44
What number designates double pitch roller chain?
20
45
Which chain allows for various types of attachments?
Hollow pin chain
46
Which type of chain allows flexing around corners but is common for backlashing?
Side bow chain
47
What type of chain is used on forklifts or counterweights?
Leaf chain
48
What type of chain runs over a sprocket, is flat on one side and is commonly used on assembly lines?
Tabletop chain
49
What is the flat side of the tabletop chain called?
Plate
50
What are 3 characteristics of engineering class chain?
1) Larger pitch 2) Higher safety factor 3) More clearances
51
What chain is used in power transmission?
Drive chain
52
What chain transfers bulk materials on large rollers?
Conveyor chain
53
What type of chain is the same as a conveyor, except it doesn't have roller
Bushed chain
54
What chain is a conveyer chain except the bushings are welded?
Welded chain
55
This chain is used in high tension applications like in floor conveyers?
Bar & pin chain
56
This chain is economical and is often used in overhead conveyor trolley system
Barloop chain
57
This chain is designed for easy attachment/detachment of chain and lacks precision?
Detachable link chain

Mechanics (17 decks)

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