Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Millwright 2 > Section 3 > Flashcards

Section 3 Flashcards

1
Q

Keys are meant to be

A

The weak link

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Another name for the Pratt and Whitney

A

 Buried key

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are woodruff key is good for

A

Light applications, small, pulleys, and gears

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are gib keys good for?

A

Heavy loads, they have an 1/8 of an inch taper per foot.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Can you use a jib head key with cast-iron?

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Two helical gear is in mesh and rotating under torque produce thrust. Helical, spine, offset or counteracts that axle or ends rust.

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

U joint both ends of driveshaft must face both yokes in the same direction?

A

Yes, or they will develop tremendous vibration problems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Tapers and eccentrics are locking devices used to mount components to shafts 

A

Used for bearings sprockets and sheaves. 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Retainer rings or snaprings are used for

A

Provided with a removable shoulder to locate retain or lock component, on shaft, boars, and inside housing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is torsional stress?

A

Torsional, shear stress is torquing twisting stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Other than a solid round cross-section what other shafts could you get?

A

Square, hex and hollow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is hollow shafting not good for?

A

Hollow shaft and is not good for shock load applications because it is less resilient than solid shafting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the purpose of line shafting?

A

To supply power to or timing several devices on a single shaft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the alloying elements

A

Aluminum carbon, chromium, copper, and lead.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does a ANSI stand for.

A

American national standards institute.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the three basic groups of ANSI?

A

Number one RC running and sliding fits

Number 2LC, LT & LN locational fits

 Number 3FN force fits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are couplings?

A

Power transmission components

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the compression coupling good for?

A

Light to moderate loads, they can be two different diameters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What do you want to do with ribbed couplings after their installed?

A

Insure the gap between the two halves is equal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

When is a rigid multi bore used?

A

Vertical pumps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How do you mount a flanged faced coupling?

A

Heavy interference, fit or taper fit, in some cases, the flange is forged part of the shaft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Is a rigid coupling, low maintenance

A

Yes, and no lube needed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Is the equipment always rated for the same misalignment as the coupling?

A

No, and it can lead to premature seal and bearing failure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the absolute maximum?

A

Specified misalignment rating from the manufacture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is the most common type of roller chain?

A

The double strand roller chain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What is the material flexible coupling

A

Constructed to allow parts of the coupling to flex, when it is subjected to misalignment, load changes and reversing and shock loads.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

A single flexible metal disc coupling cannot tolerate angular misalignment.

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What are the types of material and mechanical flexible coupling

A

Steel grid, Jaw and spider, splined rubber, pin and disc , pin, and rubber bushing coupling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Centrifugal, design, couplings what are the characteristics?

A

Soft start, smooth, acceleration, overload protection, dampening, shockload

30
Q

Dry, shot fluid coupling what is the inner section of the coupling called?

A

The rotor

31
Q

Centrifugal shoe coupling

A

It allows the prime mover to reach partial speed before the load is fully engaged, it is good on drives it frequently stop and start under heavy loads.

32
Q

When do you use gears?

A

When slippage is not acceptable

33
Q

What are open gears good for

A

They are suitable for light, duty drives, or in situations when sealing the gears from the elements is difficult or impossible

34
Q

 What are gears?

A

Gears are the mechanical advantage

35
Q

What kind of lubrication can be used in an enclosed gear

A

Either grease or oil

36
Q

What is another name for a crown gear?

A

The ring gear

37
Q

Which gear is the pinion?

A

 The gear with fewer teeth, and is usually the drive gear

38
Q

How many bearings does an overhang have?

A

One

39
Q

How efficient are chains

A

98 to 99% efficient

40
Q

What is the recommended slack of chains.

A

2 to 3%

41
Q

Using a spring clip on a chain, which end should face the direction of travel

A

The closed end

42
Q

How much will an offset link shorten the length of a chain?

A

One pitch

43
Q

How are heavy series chains designated?

A

H following the number

44
Q

Loading factors, a three strand is how much stronger than a single

A

2.5 times.

45
Q

A sintered bushing chain capacity

A

Is 10% less than a standard chain, but it’s five times the life

46
Q

Classical standard series

A

A,B,C ,D or E

47
Q

V belts are the most effective means of power transmission

A

Yes

48
Q

What is the minimum arc of contact. V belt

A

120

49
Q

Compression material

A

Transmits the power between the Sheave and the tensile member

50
Q

What is the pitch line?

A

Runs through the load carrying zones of the belt where tension members are located

51
Q

Cogged belts have

A

Greater flexibility

52
Q

High capacity

A

3v, 5v 8v

53
Q

Poly v belts

A

J, K, L

54
Q

Round belt is for

A

1/4 turn drives
Surpentine drives
Open ended

55
Q

Rounded belts are used for

A

Light duty

56
Q

Can you use an idler on a reversing drive?

A

No

57
Q

Double v belts

A

AA , BB and CC

58
Q

Are chain drives is more efficient than V belt drives

A

Yes

59
Q

Chain dimensions are proportional to chain pitch

A

Yes

60
Q

What chain type is used to transfer maximum power with the smallest pitch size

A

Multiple strand

61
Q

What v belt choice would best suit a serpentine Drive

A

A double V belt

62
Q

What Veebelt could solve the problem of continually rolling over or jumping pully grooves

A

Banded

63
Q

Can you use poly V belts in reverse, bend applications?

A

Yes

64
Q

What type of chain-link Bends less should be used on small diameter sprockets

A

Short

65
Q

Standard roller chain width is equal to

A

5/8 times pitch

66
Q

A truncated cone would represent what type of gear

A

A bevel gear

67
Q

The hand of the spiral on the spiral bevel gears is indicated by the direction in which the teeth curve

A

Away from the shafts axis

68
Q

Mitre gears set is used

A

On shafts intersecting at right angles, on parallel shafts, and on 1 to 1 drives

69
Q

Which gear system produces no axial thrust

A

Spiral bevel, double helical,

70
Q

The direction of thrust produced by a helical gear

A

The direction of the helix angle, the direction of gear rotation

71
Q

Which system do both input and output shaft rotate in the same direction

A

Internal spur gear

72
Q

What is the gap on a QD bushing between sprocket and flange

A

1/8–1/4

Millwright 2 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions