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30 Cards in this Set
- Front
- Back
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Name 4 key components of a conveyor system |
Frame Drive pulley Return pulley Tensioning device |
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What is the purpose of a tripper |
Allows the discharge of material from either selected points or any points along the length of the conveyor |
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What is required to permit a conveyor to operate efficiently with a constant load |
Feeders |
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What precautions must be observed with screw take-ups |
Not to over tension the belt |
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Name the main components of a conventional multi-ply belt |
Top cover Bottom cover Carcass |
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What portion of the belt carries the load and tension |
Carcass |
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What three functions does an automatic take-up perform |
Maintain tension Remove slack on startup Provide reserve for splicing Allow expansion and contraction of belt due to weather conditions |
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What type of splice do steel cable belts require |
Hot vulcanized |
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Name 3 types of joining methods |
Mechanical Cold vulcanized Hot vulcanized |
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What type of fastener would be best suited for small repairs or tears to a belt |
Double plate |
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A hot vulcanized slice attains 100% belt strength |
False it can only achieve 90 % strength |
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What type of pulley is required with steel core belts |
Smooth |
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What type of pulley is used to prevent material build up between belt and pulley |
Self cleaning or wing pulley |
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Crown pulleys can be used as head pulleys |
True |
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To increase the arc of contact on a drive pulley a _____pulley is used |
Snub |
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Other than increasing the arc of contact, what else can be done to increase the friction between the belt and pulley |
Install lagging |
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What are the three main troughing angles |
20 35 45 |
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State the purpose of transition idlers |
To level or trough the belt before going over the head or tail pulley and to prevent belt edge stretching |
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Fixed side guide idlers are installed to correct small belt tracking problems |
False |
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What type of idlers are installed at the loading points to prevent belt damage |
Impact idlers or impact cradles |
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What type of return idlers are used when sticky material is being transported |
Spiral rubber disc |
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What factors are considered at a loading point |
Same speed and direction of belt travel |
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What four points should be considered when designing a chute |
Center material Feed in same direction of belt travel Reduce impact Be steep enough to prevent material from sticking to sides |
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What are installed at loading points to prevent material from spilling |
Sideboards and skirts |
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List 5 factors that affect belt tracking |
Frame damage Foundation settling Off-center loading Incorrect belt splice Take-up carriage out of line Incorrect belt tension Material buildup on idlers |
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If a belt cannot be aligned by adjusting the idlers the tail pulley may be adjusted |
True |
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On long belts the return rollers maybe inclined at _____to form a V |
10 or 20 degrees |
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To clean the carrying side of the belt on a troughing conveyor a V pole is installed just before the head pulley |
False |
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What three methods can be used to remove tramp iron from the material |
Suspended magnet Magnetic head pulley Separate magnetic belt above discharge |
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If an inclined belt that is running downhill had a power failure a backstop device prevents belt runaway |
False |
