Question

Elevators are conveying machines for handling of bulk materials on vertical or steep slope of _______

• A. 0-10 degree to the horizontal
• B. 30-40 degree to the horizontal
• C. 60-80 degree to the horizontal
• D. In horizontal direction only

Hint:

Bucket elevators are preferred for vertical lifts of grains, seeds, and small granular foods because they prevent back-sliding of materials during transport.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Material handling equipment in food processing includes conveyors and elevators, which are selected based on the path and angle of transport.

Step 2: Detailed Explanation:
Conveyors (like belt or screw conveyors) are typically used for horizontal transport or shallow inclines (generally up to \(30^\circ\)).
Elevators (such as bucket elevators) are designed to lift bulk materials vertically or along steep slopes.
These steep inclines typically range from \(60^\circ\) to \(90^\circ\) (specifically \(60-80^\circ\) to the horizontal), where a standard flat conveyor belt would allow the material to slide backward.

Step 3: Final Answer:
Therefore, elevators handle bulk materials on steep slopes of \(60-80\) degrees to the horizontal.