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Doctors Medicines MCQs Q&A

  1. Focusing the prism
  2. Making the pivot exactly vertically over the ground station mark
  3. Center of the pivot coincides with geometrical center of graduated ring
  4. Levelling
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Option 3 : Center of the pivot coincides with geometrical center of graduated ring

Explanation:

Temporary Adjustments of Compass are:

  1. Fixing the compass to the tripod.
  2. Centering the compass: Making the pivot exactly vertically over the ground station mark
  3. Levelling the compass
  4. Sighting the object: By focusing through the prism
  5. Observation of bearings

 The permanent adjustment is made to establish the fixed relationships between the fundamental lines of the instrument, and once made, they last for a long time. The following are the permanent adjustments in transit Theodolite:

  1. Adjustment of the Horizontal Plate Levels.
  2. Collimation Adjustment: Axis of the telescope level is adjusted to parallel the line of collimation.
  3. Horizontal Axis Adjustment: Horizontal axis is perpendicular to the vertical axis when the instrument is leveled.
  4. Adjustment of the Telescope Level or the Altitude level.
  5. Vertical Circle Index Adjustment
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