Surface Mining Technology Mid - II, November - 2014

1.Max operating gradient of scraper in empty machine
  • 10°
  • 15°
  • 20°
  • 25°
Answer: B
2.While operating on a bench, a scraper should not approach within ----------- of the bench Crest
  • 1m
  • 2m
  • 3m
  • 4m
Answer: B
3.Stripping ratio for shovel-dumper combination is
  • 1.5:1
  • 2:1
  • 4 to 5:1
  • 8 to 10:1
Answer: C
4.The height of the bench is decided by
  • Drill machine capacity
  • height of the dumper
  • Height of the boom of shovel above the floor
  • 5m
Answer: C
5.The method involves mining & washing together of unconsolidated or semi-consolidated Rock where the ground surface is called
  • Surface mining
  • Hydraulic mining
  • Glory mining
  • Placer mining
Answer: D
6.The process of underwater mining of sand clay, tin and placer deposits of gold is known as
  • Hydra licking
  • Dredging
  • Placer mining
  • Locking
Answer: B
7.The range of application of hydro licking is mostly limited to
  • Hard rock’s
  • Placer
  • Coal
  • Soft rocks
Answer: B
8.In solid blasting system the max. Charge in a shot hole should not exceed
  • 150gm
  • 250gm
  • 335gm
  • 565gm
Answer: D
9.As per PGMS standards, a born dust concentration
  • < 1 mg/m3
  • < 2 mg/m3
  • < 3 mg/m3
  • < 4 mg/m3
Answer: C
10.Among the following which is not involved in air pollution
  • SoX
  • NoX
  • H2S
  • CO2
Answer: C
11.Mines cancer – premoconiosits caused due to __________________.
Answer: Coal air condense
12.My cozies is caused due to ________________.
Answer: Mice
13.What is meant by MOEF ______________________.
Answer: Ministry of environment & forest
14.In hydra licking the effectiveness of the monitor depends on ______________________.
Answer: Dias of nozzle & water pressure
15.The desirable water pressure of the nozzle in hydra licking is around _______________.
Answer: 10-12kg/cm2
16.Best gradient for any truck is _______________.
Answer: <6°
17.Size of the suspended type dust particles __________________.
Answer: <100 mm
18.Dozer generally moves the spoil towards the pit in service of cuts and the backfilling affairs a Banal slope varying from _______________.
Answer: 0° to 15°
19.EIA means ________________________.
Answer: Environmental impact assessment
20.MOEF means ______________________.
Answer: Ministry of environment & forest