Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Millwright Level 4 > Conveving Systems > Flashcards

Conveving Systems Flashcards

(93 cards)

Start Studying
1
Q

The key components of a conveyor are the ______

A

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

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

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

A

Loading point

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

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

Installation of ______ if material is abrasive

A

Chute liners

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

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

The boards should never come into contact with the _____

A

Belt a minimum 1-inch clearance

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

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

The top cover in most cases is usually ____

A

Thicker then the bottom cover

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

The top cover must resist __

A

Abrasion and gouging from the material being conveyed

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

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

A

Carcass

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

There are 4 basic types of carcass

A
  • solid woven
    -reduced ply
    -multiple ply
    -steel cord
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The solid woven belt consists of a

A

Single ply

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

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

A

Multi ply (2)

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

Multiple ply belts usually have at least

A

3 layers of woven material

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

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

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

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

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

A

Crowned pulleys

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

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

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

A

Head pulley

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

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

A

Troughing idlers

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

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

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Head pulleys should never______
Be adjusted to correct belt misalignment
26
On inclined conveyors a _____ is required to prevent rollback in the event if power failure
Backstop
27
A backstop is usually a _____
Sprag or over-running clutch
28
_______ Are usually attached to the bottom or carrying side to increase the service life of the conveyor.
Wear strips
29
The 3 main classes chain conveyor designs fall into are
Parallel strand Gravity drop drives S drives
30
On a ________ the top and bottom chain strands are as close to parallel as possible and the drive is located at the head end
Parallel strand conveyors
31
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.
Gravity drop
32
_______ 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.
S drive
33
Combination chain consists of A._________ With two cast side plates connected to each other with two steel side plates and a steel pin
Cast steel block or barrel
34
Each link of the_______ is a One piece casting of malleable iron with both barrel and sidebars
Pintle chain
35
Pintle chain is available in class____
400 and class 700
36
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
H class mill chain
37
Available H class mill chain pitches range from ______
1.654 inches to 4.000 inches
38
______ are stronger and more accurately made then cast chains and come in many chain types and can also be welded
Fabricated chains
39
Is one of the simplest chain drives because it requires no special tools to assemble or disassemble thus chain is primarily for slow speed
Detachable chain
40
________ Is available in rooftop also known as comelback and the roller top design
Transfer chain
41
_____ is modified cast pintle chain with a raised solid top usually in the shape of a roofe
Rooftop
42
_______ 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.
Roller top chain
43
Flights made from _____ or channel beansre fastend to a combination chain at regular intervals along the length of the chain
Angle iron
44
Design is usually found, on large, diameter sprockets. It allows the sprockets to be changed without disturbing the drive arrangement or alignment.
Split hub
45
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
Long link chain or star sprocket
46
______ 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
Apron or pan conveyors
47
_____ transport material up inclined or vertical planes
Bucket elevators
48
With belt bucket elevator the best method for joining is _______ other methods include mechanical fasteners ( for relatively light belt elevators) or bolted joints
volcanizing
49
_______ 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
Lap joints
50
Most manufacturers recommend using a _______ rather then trying to hammer in the pins
Pin press
51
Never ____ the sidebars or ____the pins to facilitae easy Assembly, this causes permanent chain failure.
Heat or grind
52
One of the most common maintenance items on elevators are the
buckets
53
For chain elevators inspect the sprocket and traction wheel for ____
Excessive wear
54
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
measuring the length over 10 pitches
55
Before preforming any maintenance checks on a bucket elevator ____
Purge the elevator of all materials
56
_____ have the same pitch dimensions as the screw diameter and convey a wide range of materials
Standard flights
57
_____ used in screw feeders increases from 2/3 diameter to full diameter and provide uniform withdrawal of lumpy material
Tapered standard pitch screw flights
58
Which is less then standard pitch prevent flooding or overfilling of material in feeders and is also found on inclined conveyors
Short pitch
59
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
Half pitch
60
These couplings are also referred to as______ and are fitted into the end of the screw sections and bolted into place
gudgeon shafts
61
One of these bearings must b abel to accept
Axial Thrust
62
The axial thrust is in the _______ of material flow and the thrust bearing is normally located at the _____
opposite direction Discharge end
63
The most common design is U shape through fabricated from steel. Sheeting with flanged ends for easy accurate assembly.
Screw conveyor
64
Because of the simple design of most screw conveyors the main maintenance area is the
Drive system
65
Excessive wear caused the screw to come into contact with the bottom of the trough and result in ___
Holes being worn through the trough rapidly
66
The 2 general types of roller conveyors are
Gravity roller conveyor Live roller conveyor
67
_______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
Gravity roller conveyor
68
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.
Standard gravity roller conveyor
69
The frame that supports the rollers is also called the ___
Roll case
70
____ Are typically constructed of steel tubing. ball bearings are installed in each end
Gravity roller conveyor rollers
71
For roller conveyors, the smallest number of rollers under the smallest container at any time should be
3
72
For skate wheel conveyors, the smallest number of wheels under the smallest package should the conveyor is expected to handle should be ____
5
73
In gravity, roar conveyors, the outer race of the bearing revolves around the.______
Fixed inner race
74
____ Is the amount of drop per unit Length a conveyor requires in order to carry the given loads
Conveyor pitch
75
The ____ of a Curve is named using the direction of flow as reference.
Hand
76
_______ Are generally used to move objects sideways across the roll after reaching an end stop.
Spiral rolls
77
______ 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
Angled rolls
78
_______ Are movable arms or plates used to sort packages in a Roller conveyor system
Deflectors
79
______ Are used to Transfer packages across side transfer chains. They can be used to sort or remove packages in a conveyor process.
Jump rolls
80
_____ Join the package flow on two or more conveyors into one conveyor line.
Converge conveyor section
81
A_____ Send packages from a single roller conveyor to 2 or more conveyors lines
Diverge conveyor section
82
_____ Can be vertically or horizontally pivoting And can be used to open an alley through a roller conveyor when required.
Hinged gates
83
_______Generally operate with air pressure ranging from 15psig to 45psig
Medium pressure conveyors
84
______ system operate up to 125psig
High pressure system
85
Deflector mounts need ____
Thrust bearings
86
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 _____
24 hours 28 days
87
Cement based grout mixtures should not be placed in temperatures below ___ unless auxiliary heating is provided
5c
88
When using polymeric grout make sure to wear__________
Eye protection, rubber gloves and dust mask
89
Levels normally incorporate an _______
adjusting screw and locking screw
90
Check the level all around after tightening the anchor bolt nut to ____ of there final torque value
50%
91
Fixed anchor bolts should be as deep as
A depth not less then 25 D
92
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
Boxed anchor bolts
93
Drop in anchor sleeves require a
Setting tool

Millwright Level 4 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions