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Millwright Level 4 > Conveving Systems > Flashcards

Conveving Systems Flashcards

1
Q

The key components of a conveyor are the ______

A

Belts,idlers, pulleys, take up and tensioning device and loading and unloading systems

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2
Q

In belt conveyors the highest wear point is usually found at the ____

A

Loading point

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3
Q

To minimize some of the affects of this wear it is preferable to feed the material from loading chute at the _____

A

Same speed and in the same direction of the belt

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4
Q

Installation of ______ if material is abrasive

A

Chute liners

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5
Q

The purpose of these ______ is to allow the fine material to through the bars to the belt underneath just prior to the discharge point

A

Grizzlies

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6
Q

The boards should never come into contact with the _____

A

Belt a minimum 1-inch clearance

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7
Q

The skirt rubber should always be a _____ amd never substitute with _______

A

Soft rubber compound

Old belt material as the harder belting wears the belt

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8
Q

The top cover in most cases is usually ____

A

Thicker then the bottom cover

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9
Q

The top cover must resist __

A

Abrasion and gouging from the material being conveyed

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10
Q

______ Is the portion of the belt that provides strength and tension?

A

Carcass

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11
Q

There are 4 basic types of carcass

A
  • solid woven
    -reduced ply
    -multiple ply
    -steel cord
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12
Q

The solid woven belt consists of a

A

Single ply

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13
Q

Reduced ply This type of carcass either has fewer plies then a regular____ or has a special weave

A

Multi ply (2)

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14
Q

Multiple ply belts usually have at least

A

3 layers of woven material

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15
Q

The _________ type can also be used to repair section of belt that have become damaged or to repair small tears and slits

A

Bolted solid plate type

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16
Q

The _____ is the pulley that transmits the power from the power unit to the belt. It may be lagged,smooth,self cleaning or crowned

A

Drive pulley

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17
Q

______ is a rubber based compound and is normally found on drive pulley. It’s main purpose is to increase the coefficient of friction between the belt and the pulley

A

Lagging

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18
Q

____ refers to a pulley with a larger diameter at the center then at the ends

A

Crowned pulleys

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19
Q

The increase in diameter on a crowned pulley tends to keep the belt centered on the pulley. Standard crown is ____

A

1/8 per foot of pulley face width

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20
Q

The ________ pulley is always located at the discharge point and is usually the largest diameter pulley in the conveyor

A

Head pulley

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21
Q

The most common used ______ have three rollers of equal length arranged in line with each other

A

Troughing idlers

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22
Q

The advantage of this type is that it allows the belt to sit lower in the frame thereby reducing material load height ____

A

Offset type

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23
Q

Fixed side guides do not ____ they only prevent damage to the framework of the conveyor the belt or other objects caused by belt running off to one side

A

Correct a misaligned belt

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24
Q

If a belt continues to run off one method of correction is to slightly _____

A

Skew the idlers in the direction of belt travel

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25
Q

Head pulleys should never______

A

Be adjusted to correct belt misalignment

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26
Q

On inclined conveyors a _____ is required to prevent rollback in the event if power failure

A

Backstop

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27
Q

A backstop is usually a _____

A

Sprag or over-running clutch

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28
Q

_______ Are usually attached to the bottom or carrying side to increase the service life of the conveyor.

A

Wear strips

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29
Q

The 3 main classes chain conveyor designs fall into are

A

Parallel strand
Gravity drop drives
S drives

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30
Q

On a ________ the top and bottom chain strands are as close to parallel as possible and the drive is located at the head end

A

Parallel strand conveyors

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31
Q

On _______ The conveyor is on slope and the drive sprocket is above the floor level, which allows the weight of the chain to maintain contact with the drive sprocket.

A

Gravity drop

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32
Q

_______ Are used when long heavily loaded chain conveyors are required. Because this type of drive allows engagement of the maximum number of drive teeth on the sprocket.

A

S drive

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33
Q

Combination chain consists of A._________ With two cast side plates connected to each other with two steel side plates and a steel pin

A

Cast steel block or barrel

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34
Q

Each link of the_______ is a One piece casting of malleable iron with both barrel and sidebars

A

Pintle chain

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35
Q

Pintle chain is available in class____

A

400 and class 700

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36
Q

The _______ Has the same design as pintle, but it has heavier construction and flanged. Wearing shoes cast onto the bottom surface. For applications with abrasive material

A

H class mill chain

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37
Q

Available H class mill chain pitches range from ______

A

1.654 inches to 4.000 inches

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38
Q

______ are stronger and more accurately made then cast chains and come in many chain types and can also be welded

A

Fabricated chains

39
Q

Is one of the simplest chain drives because it requires no special tools to assemble or disassemble thus chain is primarily for slow speed

A

Detachable chain

40
Q

________ Is available in rooftop also known as comelback and the roller top design

A

Transfer chain

41
Q

_____ is modified cast pintle chain with a raised solid top usually in the shape of a roofe

A

Rooftop

42
Q

_______ Has raised brackets into which rollers are fitted. The rollers are parallel to the direction of the chain travel and from an almost continuous line.

A

Roller top chain

43
Q

Flights made from _____ or channel beansre fastend to a combination chain at regular intervals along the length of the chain

A

Angle iron

44
Q

Design is usually found, on large, diameter sprockets. It allows the sprockets to be changed without disturbing the drive arrangement or alignment.

A

Split hub

45
Q

Another type of sprocket is the ______or _____. This sprocket has either 5 or 7th and is available with individual renewable teeth or integral cast teeth

A

Long link chain or star sprocket

46
Q

______ consist of two or more chain strands with formed flights attached theses conveyors convey large amounts of heavy or very hot material and are found in the mining and processing industry

A

Apron or pan conveyors

47
Q

_____ transport material up inclined or vertical planes

A

Bucket elevators

48
Q

With belt bucket elevator the best method for joining is _______ other methods include mechanical fasteners ( for relatively light belt elevators) or bolted joints

A

volcanizing

49
Q

_______ are made by overlapping the ends of the belt over each other for at least one belt width and then fastening them with elevator bolts. On belts with fewer then 10 plies the minimum length of belt splice is equal to the belt width

A

Lap joints

50
Q

Most manufacturers recommend using a _______ rather then trying to hammer in the pins

A

Pin press

51
Q

Never ____ the sidebars or ____the pins to facilitae easy Assembly, this causes permanent chain failure.

A

Heat or grind

52
Q

One of the most common maintenance items on elevators are the

A

buckets

53
Q

For chain elevators inspect the sprocket and traction wheel for ____

A

Excessive wear

54
Q

Check chains for elongation by ______ and then comparing the measurement to a new chain measurement or the manufacturer chart randomly pull pins to check them for wear

A

measuring the length over 10 pitches

55
Q

Before preforming any maintenance checks on a bucket elevator ____

A

Purge the elevator of all materials

56
Q

_____ have the same pitch dimensions as the screw diameter and convey a wide range of materials

A

Standard flights

57
Q

_____ used in screw feeders increases from 2/3 diameter to full diameter and provide uniform withdrawal of lumpy material

A

Tapered standard pitch screw flights

58
Q

Which is less then standard pitch prevent flooding or overfilling of material in feeders and is also found on inclined conveyors

A

Short pitch

59
Q

Is similar to short pitch except that the pitch is half the standard pitch length. It is found in vertical or steep inclined applications where the material conveyed is fluid

A

Half pitch

60
Q

These couplings are also referred to as______ and are fitted into the end of the screw sections and bolted into place

A

gudgeon shafts

61
Q

One of these bearings must b abel to accept

A

Axial Thrust

62
Q

The axial thrust is in the _______ of material flow and the thrust bearing is normally located at the _____

A

opposite direction

Discharge end

63
Q

The most common design is U shape through fabricated from steel. Sheeting with flanged ends for easy accurate assembly.

A

Screw conveyor

64
Q

Because of the simple design of most screw conveyors the main maintenance area is the

A

Drive system

65
Q

Excessive wear caused the screw to come into contact with the bottom of the trough and result in ___

A

Holes being worn through the trough rapidly

66
Q

The 2 general types of roller conveyors are

A

Gravity roller conveyor

Live roller conveyor

67
Q

_______Can move Material in Any horizontal Direction when they are tied down, the force of gravity on the package causes the material to turn the rolls

A

Gravity roller conveyor

68
Q

Use cylindrical rollers that are usually supported with ball bearings. The rollers must be spaced close enough together to safely support the container of material to be handled.

A

Standard gravity roller conveyor

69
Q

The frame that supports the rollers is also called the ___

A

Roll case

70
Q

____ Are typically constructed of steel tubing. ball bearings are installed in each end

A

Gravity roller conveyor rollers

71
Q

For roller conveyors, the smallest number of rollers under the smallest container at any time should be

A

3

72
Q

For skate wheel conveyors, the smallest number of wheels under the smallest package should the conveyor is expected to handle should be ____

A

5

73
Q

In gravity, roar conveyors, the outer race of the bearing revolves around the.______

A

Fixed inner race

74
Q

____ Is the amount of drop per unit Length a conveyor requires in order to carry the given loads

A

Conveyor pitch

75
Q

The ____ of a Curve is named using the direction of flow as reference.

A

Hand

76
Q

_______ Are generally used to move objects sideways across the roll after reaching an end stop.

A

Spiral rolls

77
Q

______ Rolls set an angle. On their roll case, (guided roll case) are used When the Packages or product must be lined up against one side

A

Angled rolls

78
Q

_______ Are movable arms or plates used to sort packages in a Roller conveyor system

A

Deflectors

79
Q

______ Are used to Transfer packages across side transfer chains. They can be used to sort or remove packages in a conveyor process.

A

Jump rolls

80
Q

_____ Join the package flow on two or more conveyors into one conveyor line.

A

Converge conveyor section

81
Q

A_____ Send packages from a single roller conveyor to 2 or more conveyors lines

A

Diverge conveyor section

82
Q

_____ Can be vertically or horizontally pivoting And can be used to open an alley through a roller conveyor when required.

A

Hinged gates

83
Q

_______Generally operate with air pressure ranging from 15psig to 45psig

A

Medium pressure conveyors

84
Q

______ system operate up to 125psig

A

High pressure system

85
Q

Deflector mounts need ____

A

Thrust bearings

86
Q

The finished grout should be kept wet for _____ using sprays or covered with wet canvas or sacking. Cement based grout be worked on after seven days but reaches its full compressive strength after _____

A

24 hours
28 days

87
Q

Cement based grout mixtures should not be placed in temperatures below ___ unless auxiliary heating is provided

A

5c

88
Q

When using polymeric grout make sure to wear__________

A

Eye protection, rubber gloves and dust mask

89
Q

Levels normally incorporate an _______

A

adjusting screw and locking screw

90
Q

Check the level all around after tightening the anchor bolt nut to ____ of there final torque value

A

50%

91
Q

Fixed anchor bolts should be as deep as

A

A depth not less then 25 D

92
Q

It also features a pocket in the concrete pad that extends through to the side to enable the nut to be removed from end of the anchor bolt

A

Boxed anchor bolts

93
Q

Drop in anchor sleeves require a

A

Setting tool

Millwright Level 4 (9 decks)

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