The self aligning level called . . . . . . . .
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Mining Engineering · all questionsMine Surveying
Mine Surveying
practice.
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The magnetic bearing of a line AB is 132°. What is the true bearing of the line of magnetic declination is 8° 30' E.
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The most reliable method of plotting a theodolite traverse is by . . . . . . . .
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The number of plates in theodolite.
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The length of the line measured with a 30m chain was found to be 450m. Calculate the true length of the line if the chain was 0.15 in too long.
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Reduced bearings are measured from . . . . . . . .
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From the following page of a levelling field book, the missing values in F. S. and B. S respectively are
| Station | B. S. | I. S. | F. S. | Rise | Fall | Remarks |
|---|---|---|---|---|---|---|
| 1 | 4.550 | Starting Point | ||||
| 2 | 2.125 | ? | 0.750 | Change point | ||
| 3 | 2.225 | |||||
| 4 | ? | 1.975 | Change point | |||
| 5 | 2.445 | 1.500 |
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Common scale used for plotting building site is . . . . . . . .
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The dip of the magnetic needle at the pole is . . . . . . . .
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The invar tape ismade of an alloy of . . . . . . . .
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For a closed traverse the omitted measurements may be calculated . . . . . . . .
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If the vertical circle is on the left side of the observor the theodolite in face . . . . . . . . condition.
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For checking closed traverse the total sum of included angles is equal to . . . . . . . .
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If the radius of a simple curve is R the length of the chord for calculated off sets by the method of chords produced, should not exceed.
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A location survey is performed to . . . . . . . .
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The positive latitude is known as . . . . . . . .
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In tachometric observations, the staff readings are found to be 2.4m, 3m and 3.6m. If the angle of elevation is 45m the multiplying factor is 100 and the additive constant is 0.3m then horizontal distance between the staff and the instrument station expressed in m is . . . . . . . .
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Ranging rod is used for making, position of . . . . . . . .
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In a double line field book, the space between the two lines is used for . . . . . . . .
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For highly precise works . . . . . . . . tape is used.
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