433A Conveyor Systems 4

Question 1

What is a roller conveyor and what are its two main types?

Accepted Answer

A conveyor using a series of rollers to transport items, available as gravity-powered (unpowered) or motor-driven (powered) types

Answer

A roller conveyor uses a series of cylindrical rollers mounted in a frame to transport items. Gravity roller conveyors use a slight decline and the item's weight for movement. Powered roller conveyors use chains, belts, or individual motors to drive the rollers for controlled transport.

Question 2

What is the main advantage of a pneumatic conveying system?

Accepted Answer

It can transport bulk materials through enclosed pipelines over long distances with flexible routing, dust containment, and minimal material degradation

Answer

Pneumatic conveying uses air pressure or vacuum to transport dry bulk materials through enclosed pipelines. Its advantages include completely enclosed (dust-free) operation, flexible routing (around obstacles, vertical runs), multiple pickup and discharge points, and suitability for fragile materials.

Question 3

When installing a new conveyor belt, what is the correct procedure for tracking the belt?

Accepted Answer

Run the belt empty at slow speed, systematically adjusting idlers from the tail toward the head, making small adjustments and allowing the belt to respond before making additional changes

Answer

Belt tracking is performed with the belt running empty at reduced speed. Starting at the tail end, each idler is adjusted slightly, with time allowed for the belt to respond before the next adjustment. The process works systematically toward the head end, with only small adjustments at each step.

Question 4

What is the purpose of a plough (V-plow) on a belt conveyor?

Accepted Answer

To divert material off the side of the belt at an intermediate discharge point before the head pulley

Answer

A V-plow or diverter plow is a V-shaped blade that can be lowered onto the moving belt to divert material off one or both sides at intermediate points along the conveyor, allowing discharge before the head pulley.

Question 5

What safety device prevents personnel from being caught in conveyor nip points?

Accepted Answer

Guards covering all nip points where the belt meets pulleys and where rotating parts could catch clothing or body parts

Answer

Nip point guards are physical barriers (mesh, plate, or shaped guards) installed at all points where the belt contacts pulleys, where rollers meet the belt, and around other rotating components. They physically prevent hands, clothing, or body parts from being drawn into the pinch point.

Red Seal Millwright 433A Practice Test

Red Seal Millwright 433A Practice Test

433A Conveyor Systems 4