In which case will the permissible incline in belt conveyor be maximum?

Question

Question

This question was previously asked in

RRB JE CE 19 Sept 2019 (Shift 1) CBT 2 Official Paper

Answer 1

Explanation:

Permissible Inclination in Belt Conveyors:

The permissible inclination angle depends on the angle of repose and flowability of the material.
Higher angle of repose → Higher permissible inclination.

Table 1: Class Based on Flowability, Angle of Surcharge, and Angle of Repose

(Clause 4.2.2 of IS IS 8730)

Class	Angle of Surcharge (°)	Angle of Repose (°)	Flowability	Material Characteristics
1	5	Over 0 and up to 20	Very free flowing	Uniform size, very small rounded particles, either very wet or very dry, such as dry silica sand, cement, wet concrete, etc.
2	10	Over 20 and up to 30	Free flowing	Rounded, dry polished particles of medium weight, such as whole grain and beans.
3	20	Over 30 and up to 35	Average flowing	Irregular, granular or lumpy materials of medium weight, such as anthracite coal, cotton-seed meal, clay, etc.
4	25	Over 35 and up to 40	Average flowing	Typical common materials, such as bituminous coal, stone, most ores, etc.
5	30	Over 40	Sluggish	Irregular, stringy, fibrous, interlocking materials such as wood chips, bagasse, tempered foundry sand, etc.