Chapter 19 - Material Handling Systems Flashcards
Why are there so many different types of conveying systems?
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How is the type of belt determined?
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What are the purposes for the following belt parts:
- top cover?
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What are the purposes for the following belt parts:
- bottom cover?
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What are the purposes for the following belt parts:
- carcass?
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Describe the following carcass designs:
- solid woven
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Describe the following carcass designs:
- reduced-ply
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Describe the following carcass designs:
- multiple-ply
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Describe the following carcass designs:
- steel cord
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List the types of mechanical fasteners used to join conveyor belts
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Briefly describe cold-splicing and hot vulcanized splicing and state which is stronger
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How is the diameter and style of a pulley determined?
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What is the purpose of a crowned pulley and where should it be used?
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Briefly describe the head pulley
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Briefly describe the following:
- lagged drive pulley
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Briefly describe the following:
- smooth drive pulley
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Briefly describe the following:
- self-cleaning drive pulleys
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Define the following:
- tail pulleys
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Define the following:
- snub pulleys
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Define the following:
- bend pulleys
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List the two basic types of idlers with a conveyor system
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How is belt alignment achieved?
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What are the advantages of troughing conveyors?
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Where should a millwright begin when training a conveyor belt?
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Why are offset rollers used in troughing conveyors?
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What are the advantages of suspended idlers?
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What is the purpose of transition idlers?
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Where are flat-belt carrying idlers used?
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What is the purpose of rigid side-guide idlers?
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List the types of return idlers used on conveyor systems
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What are the purposes and locations of self-aligning idlers?
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Describe the principles of operation with regard to the troughed-belt training idlers and the return training idlers
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What is the purpose and location of impact idlers?
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What are the purposes of take-ups?
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Describe the following:
- gravity take-ups
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Describe the following:
- horizontal (carriage) take-ups
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Describe the following:
- screw take-ups
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Describe the following:
- pneumatic and hydraulic take-ups
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How is impact and abrasion minimized during the loading of a conveyor?
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What are the advantages of loading belts with a transition conveyor?
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Describe the procedure for loading a conveyor belt with a chute
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What conditions should be considered when designing a chute?
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What are the purposes of baffle plates, grizzlies and skirting?
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Describe the operating principles of the following:
- screw feeders
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Describe the operating principles of the following:
- belt feeders
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Describe the operating principles of the following:
- drag-scraper feeders
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Describe the operating principles of the following:
- apron feeders
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Describe the operating principles of the following:
- reciprocating-plate feeders
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Describe the operating principles of the following:
- control-gate feeders
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Describe the operating principles of the following:
- vibrating feeders
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Describe the operating principles of the following:
- rotary-vane feeders
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Describe the operating principles of the following:
- rotary-drum feeders
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Describe the operating principles of the following:
- rotary-table feeders
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What is the purpose of a tripper?
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Describe how belts are kept clean during operation
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How are magnetic and non-magnetic metals removed from the product of a conveyor?
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What are the purposes of the following:
- weigh scales?
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What are the purposes of the following:
- enclosure (hoods)?
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What are the purposes of the following:
- backstops (inclined conveyors)?
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List the braking methods for declined conveyors
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How does the wrap-factor affect the drive pulley?
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Briefly describe single drives, tandem drives, dual drives and multiple drives
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What causes the following training problems:
- belt runs off pulley?
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What causes the following training problems:
- belt runs off at loading point?
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What causes the following training problems:
- belt runs to one side throughout the entire length at a specific idler or group of idlers?
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What causes the belt to slip on starting?
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What causes the following fastener and vulcanizing problems:
- belt breaks at or behind fastener, or the fastener tears loose?
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What causes the following fastener and vulcanizing problems:
- vulcanized splice separates?
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What causes the following cover problems:
- excessive top cover wear (including rips, gouges, ruptured and tears)?
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What causes the following cover problems:
- excessive bottom cover wear?
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What causes the following cover problems:
- broken edges?
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What causes the following cover problems:
- longitudinal grooving or cracking of bottom cover?
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What would cause ply separation in the belt carcass?
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What are the buckets mounted on and what does a bucket elevator convey?
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Why is bucket speed critical in a centrifugal discharge elevator?
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How are continuous bucket elevators loaded?
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Compare super-capacity elevators to regular bucket elevators
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How are the buckets invert d in a positive-discharge elevator?
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Describe the following components:
- casing
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Describe the following components:
- head
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Describe the following components:
- boot
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Describe the following components:
- belt and chain
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Describe the following components:
- bucket
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List the merits of screw conveyors
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What are the two basic types of screw conveyors?
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Briefly describe the following:
- types of flights
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Briefly describe the following:
- sectional flights
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Briefly describe the following:
- double flights
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Briefly describe the following:
- helicoid flights
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Briefly describe the following:
- ribbon flights
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Briefly describe the following:
- double flight ribbon
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Briefly describe the following:
- cut flight
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Briefly describe the following:
- paddle conveyor
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Briefly describe the following:
- cut and folded screw flight
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Briefly describe the different pitches available for screw conveyors
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What are the reasons for different trough designs?
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How is the screw supported between the ends of the trough?
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How are these screw conveyors driven?
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What is the screw size for the following conveyor:
6H310LH?
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How are vacuum systems and pressurized systems utilized?
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Describe the operating principles of a vacuum conveying system
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Describe the purpose and operating principle of a rotary feeder
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How is the flow of regular size particulate material entering a vacuum system regulated?
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How is the material deposited at its destination from a vacuum system?
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Describe the operating principles of a low-pressure conveying system
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How is surging controlled in a gate locked feeding system?
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How is dust controlled with rotary feeders in pressurized system?
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Describe the operating principles of a medium-pressure system
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How does oil and moisture affect high-pressure fluidized conveying systems?
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How are fires and explosions prevented in high-pressure fluidized systems?
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Describe the operating principles of blow-tanks
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Describe the operating principles of vacuum-pressure conveying systems
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Describe the operating principles of air-slide gravity conveying systems
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What type of fan is used in a system where material passes through the fan?
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What type of material do roller and gravity roller conveyors move?
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What tasks are preformed by chain-driven live roller and belt-driven live roller conveyors?
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What are the advantages of roller bed conveyors ( belt riding on roller bed) compared to the other belt- and chain-driven roller conveyors?
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What is the purpose of feeder roller-bed conveyors and nose-overs?
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Describe the applications for the following:
- straight rollers
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Describe the applications for the following:
- bottle rollers
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Describe the applications for the following:
- eccentric rollers
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Describe the applications for the following:
- tapered rollers
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Which roller is most efficient for turning curves?
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What does the choice of material for roll cases and support structure depend upon?
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How is roller spacing calculated for roller conveyors?
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List the types of bearings used in conveyors
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What types of drives are used to drive roller conveyors?
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How are curves negotiated with roller conveyors?
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What type of belts are used with regard to belt conveyors?
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What type of materials are apron conveyors designed to carry?
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What positions will apron conveyors operate within?
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What type of service will apron conveyors with frame-supported rollers withstand?
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What type of buckets are used on apron conveyors?
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What materials do chain conveyors transport?
Note: The flight is the scraper attached to the chain on a flight conveyor
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What is used as the scraper (flight) in a drag conveyor?
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When removing a river, why is it sometimes necessary to drill a hole in the centre of the river on a conveyor chain after the head is ground off?
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How are head end sprockets adjusted to allow for chain wear and stretch?
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Describe tail end designs
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How are slurry mixtures transferred?
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What regulations must food handling conveyors conform to?
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Briefly describe the merits and/or applications of the following mesh belts:
- equalized weave, including special categories
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Briefly describe the merits and/or applications of the following mesh belts:
- conventional weave
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Briefly describe the merits and/or applications of the following mesh belts:
- flat wire belt
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Briefly describe the merits and/or applications of the following mesh belts:
- spiral belt
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Briefly describe the merits and/or applications of the following mesh belts:
- batter belting
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Briefly describe the merits and applications of the following synthetic belts:
- polypropylene
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Briefly describe the merits and applications of the following synthetic belts:
- acetal
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Briefly describe the merits and applications of the following synthetic belts:
- polyethylene
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Briefly describe the merits and applications of the following synthetic belts:
- nylon
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Briefly describe the merits and applications of the following synthetic belts:
- polymers
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What types of chain and flights are used in table-top belts?
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What materials are food handling sprockets made from and when should these sprockets be replaced?
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Which sprocket(s) are fixed to shafts?
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What type of bearings are best suited for intermediate bearings?
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Describe the function of belt carry-ways with both straight parallel and chevron style wear strips
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How is belt sag on the return run controlled?
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List the bi-directional conveyor designs
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What design changes are necessary for inclined conveyors?
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List the other conveyors used in food industry
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