1.15.4.c. Focusing

Try these first

1. 1.

   What is the first step in setting up a leveling instrument?

   Hint

   Think about what keeps the instrument stable.

2. 2.

   Why do we adjust the circular bubble during leveling?

   Hint

   What does the bubble indicate about the instrument's position?

3. 3.

   What is the purpose of setting the tripod during leveling?

   • A) To balance the instrument
   • B) To measure distances
   • C) To ensure a stable base
   • D) To record readings

   Hint

   Think about stability when measuring.

4. 4.

   True or False: Focusing involves only adjusting the objective lens.

   • True
   • False

   Hint

   Consider all parts adjusted for clarity.

5. 5.

   During a surveying project, the circular bubble consistently appears slightly off-center. What steps should be taken to ensure the instrument is correctly leveled before taking measurements?

   Hint

   Consider how you can keep the bubble in the center.

6. 6.

   If an observer can’t achieve sharp focus after multiple adjustments, what might be the potential causes, and what recommendations would you provide to resolve the issue?

   Hint

   Is there a chance the tool isn’t level?