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Millwright Level 4 > Material Handeling Systems > Flashcards

Material Handeling Systems Flashcards

1
Q

Highest wear points of a conveyor?

A

Loading point

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2
Q

Feeders are sometimes installed to?

A

Provide a constant stream of material to avoid conveyor being under loaded than overloaded causing spillage

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3
Q

What are the different parts of a belt?

A

Top cover
Bottom cover
Carcass

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4
Q

Top and bottom covers of a belt do what?

A

Protect the carcass

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5
Q

What does the carcass do?

A

Provides strength and tension

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6
Q

Three methods of joining belts?

A

Cold splicing
Mechanical fasteners
Hot vulcanizing

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7
Q

Crowned pulley’s are tapered 1/8” per foot from the centre outwards but should never be used when?

A

On high tension steel cable belts

Snubbed drive pulleys

Or when there are multiple drives

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8
Q

Normal drive belt arc contact is 180 degrees but a snub pulley can increase it to _______ degrees?

A

240

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9
Q

Bend pulley’s are use to?

A

Change the direction of a belt

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10
Q

Carrying idlers do what?

A

Support the loaded side of the belt

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11
Q

To get to the proper trough angle what are the degree increments from the flat pulley?

A

20, 35, 45 degrees

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12
Q

What is the purpose of having a 2 degree tilt on a troughing idler in the direction of belt travel?

A

When the belt rides to one side more of the belt is on one roller. This extra weight helps push the belt back down I line

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13
Q

Catenary idlers are mount on a _______ allowing the hole setup to be taken down and a new one installed with minimal downtime.

A

Flexible steel cable with a quick release

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14
Q

After adjusted idlers on a belt, it is still running off to one side, what else might you check?

A

Frame damage
Foundation settling
Of centre loading
Incorrect belt splice
Take up carriage not correctly inline
Incorrect belt tension
Material build up on idlers

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15
Q

When trying to centre a belt on the drum it is important not to accomplish this by?

A

Removing belt tension. Always add tension

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16
Q

Of a belt has been in service for a while and all of a sudden has tracking issues you need to ask yourself WHY! And check what?

A

Bearings
Frame damage
Belt loading area for changes
West plate come loose
Damaged splice or stretched belt

17
Q

Why must incline conveyors have a backstop or a brake built into them?

A

To prevent of moving of the conveyor if the power is shut off

18
Q

Particular section of belt runs off the one side at all points along the conveyor?

A

Belt splice out of square.

Cut out and make new splice

19
Q

Sever wear on pulley side of conveyor

A

Increase belt tension
Leg drive pulley
Increase arc contact with snub pulley

20
Q

Excessive belt stretch

A

Reduce tension by improving drive with lagging or increase arc contact

Millwright Level 4 (9 decks)

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