Mining Engineering · all questions

Introduction to Mining Engineering
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Q321

What percentage of (CO formed/O₂ absorbed) ratio indicates existence of heating?

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Q322

What is the main reason to support a slip or fault plane on its both sides?

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Q323

The attachment called "Backstay" is used with

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Q324

Which of the following method employ horizontal openings?

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Q325

In degree II gassy seam the rate of gas emission is

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Q326

'VOD' is the property of

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Q327

As per the Indian Electricity Rules 1956. the maximum permissible length of a flexible cable used coal cutting machine for longwall operation in m is

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Q328

A road in a proper coal seam is called

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Q329

The roof bolt that follows the principle of point anchorage is

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Q330

When does the first caving in long wall working starts?

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Q331

It is the part of cost of the fixed asset to the owner which is treated as loss in value of capital?

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Q332

What is the minimum gradient where every tub shall be held effectively by brakes or securely coupled to a haulage rope?

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Q333

A loose mineral deposit formed either by chemical weathering at the place of origin or formed by mechanical weathering of the ore body by the stream water. The deposit is known as

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Q334

Which of the following line of face is mostly followed during depillaring operation in India?

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Q335

Spiral attachment with the job of CCM is known as

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Q336

Hydraulic ring main system is used to

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Q337

Maximum supports are required within 10 m of freshly-exposed roof-why?

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Q338

Which of the following method was practiced in NECL for extraction of steep thick seam?

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Q339

A seam is worked at the depth of 120 m from surface and has a width galleries of 3.4 m. The percentage of extraction during development should be restricted to

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Q340

In an underground mine output from the panel is 360 tpd, having 26 days of working in a month where incubation period of coal is 9 month. If recovery from the panel is 80% and pillar size is 30 m × 30 m, height 3 m, coal sp. gravity 1.8 then find out number of pillars in the panel.

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