Home/Volume-1/Opencast Mining – 1 Volume-1 Opencast Mining – 1 Admin02/08/20240 121 Less than a minute Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% Opencast Mining Opencast Mining - 1 1 / 23 1. The degree of fragmentation in primary blasting can be increased by increasing the sp. charge and decreasing the? Spacing Burden Height Density 2 / 23 2. The machine used for pushing loose material or for digging in earth and sand is? Scraper Shovel Dragline Dozer 3 / 23 3. Sandy soil is best suited for? BWE Tractor shovel Scraper Ripper 4 / 23 4. The maximum size of the boulder that can be loaded by shovel is.....times the bucket capacity? 0.4 0.6 0.8 0.9 5 / 23 5. Terrace cut is given with the help of? Scraper Continuous miner BWE Dipper shovel 6 / 23 6. Generally, the length of sub-grade drilling is? Up to 0.5 m 0.5 to 3 m 3 to 5 m 5 to 6 m 7 / 23 7. A mounted drill designed for horizontal drilling is? Stoper Airleg Drifter Wagon drill 8 / 23 8. The most suitable machine for ripping soft rocks and medium hard rocks below hardness 5 on Moh's scale which are laminated and stratified is? Dozer Scraper Ripper Shovel 9 / 23 9. The machine employed for loading fragmented rock from a bench standing on the floor of the bench is? Tractor shovel Dipper shovel Surface miner BWE 10 / 23 10. The machine used for the excavation and removal of soft unconsolidated overburden coal and soft ores in benches of up to 90m is? Drag line Hydraulic shovel BWE Tractor shovel 11 / 23 11. The hole diameter of the wagon drill? Up to 40mm 40 - 100mm 60-125mm 150-300mm 12 / 23 12. Which is used for stripping top soil and making shallow cuts and trenches up to a depth of 3.5 to 6m? Dipper shovel Tractor shovel Ditching shovel Stripper shovel 13 / 23 13. The drill machine used for drilling for vertical holes of 150-300 mm diameter specially in medium hard rocks? Churn drill Jackhammer drill Diamond drill Well hole drill 14 / 23 14. The drill that can drill holes from 65 to 230 mm dia in hard rocks is? Electric drill Wagon drill DTH Churn drill 15 / 23 15. For good matching of load haul equipment the truck body to shovel bucket capacity ratio should be? 1 - 3 times 4 - 6 times 7 - 9 times 10 to 12 times 16 / 23 16. The machine best suited for digging below the level on which it stands and loads the dumper is? Tractor shovel Stripper shovel Back hoe Dipper shovel 17 / 23 17. The machine suitable for digging alluvium, sandy soil, unconsolidated rock or blasted coal or rock and which can dip below the level at which it stands and casts the material over a wide area is? Hydraulic shovel Dipper shovel Tractor shovel Dragline 18 / 23 18. The shovel used for stripping top soil and making shallow cuts and trenches up to or depth of 3 to 6 m is? Stripper shovel Dipper shovel Tractor Pull shovel 19 / 23 19. Which is the modification of the dipper shovel with a long boom and is used for casting fragmented rock or earth into a dump of OB? BWE Tractor shovel Hydraulic shovel Stripper shovel 20 / 23 20. The drill that can drill the holes at any angle and down to depth of 18 to 45 m is? Electric drill Wagon drill Churn drill Hand drill 21 / 23 21. In respect of dipper shovel "crowding" means? Raising bucket to dumper height Piercing the bucket into broken mineral Winging the bucket round Moving the shovel from one place to another 22 / 23 22. Minimum capacity of the bucket in BWE? 200 lit 350 lit 450 lit 500 lit 23 / 23 23. The hole diameter of the jack hammer drill is? Up to 40mm 40 - 100mm 60-125mm 150-300mm Your score is The average score is 51% LinkedIn Facebook Twitter 0% Admin02/08/20240 121 Less than a minute
