Mining Engineering · all questions

Drilling and Blasting
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Q701

Most of the high explosives blasted with the help of detonator said to be

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Q702

Specifications of stone dust should be tested once in . . . . . . . . months.

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Q703

Wind rose is used to show

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Q704

Maximum velocities of ventilating air at other roadways.

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Q705

The main mine fan has to run for all . . . . . . . . days.

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Q706

Deck loading is very useful when

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Q707

It would be advisable to design the ventilation system on the basis of . . . . . . . .

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Q708

It is good practice to select a station where there is no area changes particularly on the upstream side (ventilation survey) should atleast.

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Q709

A.N explosives detonated by

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Q710

During blasting operation in underground workings which have approached within 9m of each other the Shotfirer shall not fire in any of the faces unless some conditions are complied with. Which of the following is not to be observed as per CMR 2017?

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Q711

If the guide ropes are clammped in shaft to the girders in under ground decking level shaft may extend only . . . . . . . . m below the girder level.

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Q712

If the black damp exceeds about . . . . . . . .% the atmosphere became non explosive irrespective of any percentage of firedamp.

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Q713

The maximum number of detonators issued to have in the possession of Shot-firer during a shift shall never exceed the

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Q714

The instrument used for counting and size of suspended cloud of aerosois.

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Q715

There is no pressure drop between intake to return after installation of booster fan called . . . . . . . .

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Q716

Stone dust barrier may fail of located within . . . . . . . .m of face or other potential source of ignition.

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Q717

Horizontal roadway parallel to strike of vein located either on footwall or hanging wall side.

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Q718

Person are not permitted to travel on.

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Q719

For measuring the area of roadway of irregular shape, a suitable device used called . . . . . . . .

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Q720

To prevent coal dust raising loading skips be arranged in the

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