List of top Mining Methods and Machinery Questions on Materials Handling

A rake of wagons, with inter-wagon gap of 100 cm, is moving at a speed of 0.4 km per hour under a silo loading system. The dimensions of the wagon are 8 m (L) \(\times\) 3 m (W) \(\times\) 3 m (H). The silo stops discharging the material between the wagons. Considering the fill factor of the wagon as 0.95 and the bulk density of coal as 1.2 tonne per cubic meter, the loading rate of the silo, in tonne per hour, is . (rounded off to nearest integer)
A 1.2 m diameter drum winding system is shown. One of the winding ropes will be replaced for the manwinding cage.
A 1.2 m diameter drum winding system
Consider the following:
1) A new rope is recapped once at least in every 6 months and a length of 2 m including existing capping is to be cut off from the rope before recapping.
2) The maximum life of a rope is 3.5 years and at least 2 rounds of rope should remain on the drum while the descending cage lands at the bottomost landing point.
3) No overwinding will take place during the maximum life of the new rope. 
Neglecting the impact of fleet angle on the length of the rope, the minimum length, in m, of new winding rope is ____.(round off up to 2 decimals)
Data for a centrifugal pump discharging water from a sump to the surface are given.
Head, m : 180 
Discharge rate, m m3/hr : 320 
Operating hours per day for 270 days in a year : 14 
Operating hours per day for remaining 95 days : 20 
Overall efficiency of the pumping system  : 0.70 
Specific weight of mine water, kN/m3  : 10.20
The annual electrical power consumption in GWh, due to pumping operation, is____(round off up to 2 decimals)
A single-acting reciprocating ram pump, while running at 120 rpm, delivers water at a rate of 10 litres per second. Considering the ram diameter is 150 mm and stroke length is 300 mm, the volumetric efficiency of the pump, in percent, is \(\underline{\hspace{1cm}}\). (round off to one decimal place)
Ore is hoisted from 620 m depth using a single skip of 7 tonne pay load. The skip winding system has constant acceleration/deceleration of 1 m/s\(^2\) and a constant speed of 10 m/s. The skip loading time and unloading time are 120 s and 60 s, respectively. Considering the overall utilization of the skip as 70%, the maximum daily capacity of the winding system, in tonne, is \(\underline{\hspace{1cm}}\). (round off to the nearest integer)
In a bord and pillar panel six shuttle cars, each of 10 tonne capacity, are deployed to transport coal produced by two continuous miners to a belt conveyor. Each shuttle car on an average carries 80% of its rated capacity and makes 7 round trips in an hour. The belt conveyor has a capacity such that the effective material cross section area is of 0.09 m$^{2$ and runs at a speed 1.1 m/s. The broken coal has a bulk density of 1.2 tonne/m$^{3}$. The ratio between the production and the capacity of the belt conveyor, in percent is}