Surface Mining Technology Mid - I, September - 2014

1.Searching for ore is called?
  • Mining
  • Exploration
  • Prospecting
  • Exploitation
Answer: B
2.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
Answer: D
3.The shovel used stripping top soil and making shallow cuts and trenches upto or depth of 3 to 6 m is?
  • stripper shovel,
  • dipper shovel,
  • tractor,
  • pull shovel,
Answer: D
4.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,
Answer: C
5.The machine employed for loading fragmented rock from a bench standing onthe floor of the bench is?
  • scrapper
  • shovel,
  • surface miner
  • BWE
Answer: B
6.The machine used for pushing loose material or for digging in earth and sand is?
  • scraper,
  • shovel,
  • dragline,
  • dozer,
Answer: D
7.The most suitable machine for ripping soft rocks and medium hard rocks belowhardness 5 on mohr's scale which are laminated and stratified is?
  • dozer,
  • scraper,
  • ripper,
  • shovel,
Answer: C
8.Suitable bench height for 3.5 cu.m shovel is?
  • 8 m,
  • 10 m,
  • 12 m,
  • 14 m,
Answer: C
9.The jack hammer is used for the drill holes(30mm to 40mm dia) ?
  • upto 3m depth,
  • upto 6m depth,
  • upto 10 m depth
  • beyond 10 m depth
Answer: A
10.The depth to which the extraction of mineral is done economically by OCP is called ?
  • stripping ratio,
  • Breaeven stripping ratio,
  • Quarriable limit,
  • economical depth,
Answer: C
11.The method of estimation in which the shape and size of the ore can be estimated is called………………..
Answer: Prospecting
12.The angle of the slope of the bench wall from the horizontal is called?..................................................,
Answer: Bench slope angle
13.Horizontal ledges situated on the non productive side of the open pit and serving to accomodate the transportation roads is called?...............
Answer: Berm
14.The dumped over burden is decoaled are should not roll down at coal benches when it assumes……………………………………………….
Answer: its angle of repose
15.The machine used for pushing loose material or for digging in earth and sand is……………………………
Answer: dozer
16.The machine employed for loading fragmented rock from a bench standing on the floor of the benchis……………..…
Answer: dipper shovel
17.Opening of opencast mine is done by ………………………
Answer: box-cut
18.In respect of dipper shovel "crowding" means……………………
Answer: Piercing the bucket into broken mineral
19.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 burden………………………………..,
Answer: Dragline
20.removal of overburden to recovery of mineral…………………………
Answer: stripping ratio