and we find expression (vi) and (vii) are exactly same. This essentially means, that in a gravity roller conveyor, with requisite inclination angle B, one or many loads placed on the conveyor will move unaided due to gravity. (b) Powered Roller Conveyors Transport conveyor The rollers of a group driven transport conveyor are rotated continuously in one direction irre- spective of loads being on the conveyor or not. If the conveying rate is Q tonshr, and Lh are vertical and horizontal of the components length L' of the conveyor in meters, n-number of rollers and w is weight in kg of rotating parts of each roller and the conveying speed is Ym/sec. then the motor power P in kw will be sum total of power requirements for (i) raising the load through the vertical distance, (ii) rolling the load on the rollers and (iii) rotating the rollers against journal resistance.