Opencast Mining — Part 2 MCQs with Explanations

Single chesel carbide tipped bit is the correct answer to “Type of drill bit commonly used for Jack hammer.”. This question is standard in competitive examination syllabi for Opencast Mining.

Spiral is the correct answer to “If the pit wall are too steep to allow suitable blends the layout of haul road geometry selected to be”. This question is standard in competitive examination syllabi for Opencast Mining.

3.890m is the correct answer to “Scraper overall height is . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Wire ropes is the correct answer to “Hydraulic shovels which eliminate the use of . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

All is the correct answer to “Scrapers are unsuitable in soils with . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

At the middle of boundary is the correct answer to “The effective position of box cut for a deposit whose OB ratio: ore is least should be”. This question is standard in competitive examination syllabi for Opencast Mining.

7 kgf/cm2 is 5.5m3/min is the correct answer to “Air consumption by down the hole hammer drills at . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Horizontal deposits is the correct answer to “The conditions suitable for internal dump are”. This question is standard in competitive examination syllabi for Opencast Mining.

Rate of displacement point under consideration is the correct answer to “The best principle for predicting of dump failure at the begining stage.”. This question is standard in competitive examination syllabi for Opencast Mining.

Ultimate slope angle is the correct answer to “The angle which a plane joining the crest of the quarry which the toe of the bottom most bench makes from the borizontal.”. This question is standard in competitive examination syllabi for Opencast Mining.

Heuristic technique is the correct answer to “In ultimate pit analysis the most widely used method is”. This question is standard in competitive examination syllabi for Opencast Mining.

2.5 lac is the correct answer to “The output of the shovel with 2 cubic meter bucket is cu.m per year.”. This question is standard in competitive examination syllabi for Opencast Mining.

Rise side is the correct answer to “Over burden dumped to the . . . . . . . . of out crop.”. This question is standard in competitive examination syllabi for Opencast Mining.

Soft rocks is the correct answer to “Scrapers are suitable in soils of . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

2 m is the correct answer to “Prior to starting of open cast working some trenches are excavated to expose mineral body. The trenches are very long but limited depth; what is approximate depth.”. This question is standard in competitive examination syllabi for Opencast Mining.

External dumps is the correct answer to “Which dums are prefered in hilly terrain depsoits.”. This question is standard in competitive examination syllabi for Opencast Mining.

3 m is the correct answer to “The height of coal bench should not exceed.”. This question is standard in competitive examination syllabi for Opencast Mining.

3 - 15 m is the correct answer to “The depth of holes drilled by wagon drill ranges from”. This question is standard in competitive examination syllabi for Opencast Mining.

6 - 18 m is the correct answer to “The depth of drill holes ranges from . . . . . . . . by well hole drill machine.”. This question is standard in competitive examination syllabi for Opencast Mining.

0.2 - 0.4 m is the correct answer to “At what slice thickness the surface miner cuts the coal.”. This question is standard in competitive examination syllabi for Opencast Mining.

By a man less cutter is the correct answer to “High wall mining enables to excavate coal.”. This question is standard in competitive examination syllabi for Opencast Mining.

Quarrying is the correct answer to “Which mining is easier to extract the mineral.”. This question is standard in competitive examination syllabi for Opencast Mining.

Striping is the correct answer to “The mining which is completely effected by rains.”. This question is standard in competitive examination syllabi for Opencast Mining.

3 m3 - 22 m3 is the correct answer to “The bowl capacity of a scraper usually.”. This question is standard in competitive examination syllabi for Opencast Mining.

Wedge failure is the correct answer to “In o/c mine bench failure has occured in which triangular portion has come out the failure is . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Surface mining is the correct answer to “In which mining method, no mineral is blocked in shaft pillars or support of road ways.”. This question is standard in competitive examination syllabi for Opencast Mining.

30° off vertical is the correct answer to “What is the considerible limit for inclined drilling.”. This question is standard in competitive examination syllabi for Opencast Mining.

Back hole is the correct answer to “The machine best suited for digging below level on which it stands and load the dumper is . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Mounted is the correct answer to “Drifter is this type of drill”. This question is standard in competitive examination syllabi for Opencast Mining.

Exploration is the correct answer to “The method of estimation of the size, shape, and dimensions of ore can be estimated in”. This question is standard in competitive examination syllabi for Opencast Mining.

5 lux is the correct answer to “The standard of lighting required for heavy earth moving machinery work place.”. This question is standard in competitive examination syllabi for Opencast Mining.

All of these is the correct answer to “Benefication of Indian bituninous coal helps in . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Height is the correct answer to “It is always desirable to keep the width of the floor of bench much larger than . . . . . . . . of bench.”. This question is standard in competitive examination syllabi for Opencast Mining.

2.5 m is the correct answer to “The height of sakhi should not exceed . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Bench slope angle is the correct answer to “The angle of the slope of bench wall from horizontal.”. This question is standard in competitive examination syllabi for Opencast Mining.

SSR is the correct answer to “Best one of stability dump monitoring is”. This question is standard in competitive examination syllabi for Opencast Mining.

Blasting mats is the correct answer to “Flying of rock is controlled by”. This question is standard in competitive examination syllabi for Opencast Mining.

Height of boom of shovel is the correct answer to “The height of bench is decided by”. This question is standard in competitive examination syllabi for Opencast Mining.

Electric and Diesel is the correct answer to “Equipment which has to work from one site over long periods in a shift may be operated by . . . . . . . .”. This question is standard in competitive examination syllabi for Opencast Mining.

Plane plates with rubber soles is the correct answer to “Crawler chain machines are allowed to cross public roads if they posses.”. This question is standard in competitive examination syllabi for Opencast Mining.