A 10 cm theodolite means that
- ALength of its telescope is 10 cm
- BHeight of telescope is 10 cm
- CDiameter of the graduated circle of its lower plate is 10 cmCorrect
- DDiameter of the graduated circle of its vertical circle is 10 cm
Solution
Concept
Size of a theodolite
Step-by-step solution
1. A theodolite is specified by the diameter of its graduated circle (lower plate). 2. A 10 cm theodolite has a lower plate graduated circle of 10 cm diameter.
Explanation
The size of a transit theodolite is denoted by the diameter of the graduated circle on the lower plate. Common sizes are 8 cm, 10 cm, 12 cm and 14 cm.
Shortcut
Theodolite size = lower plate (horizontal circle) diameter.
Common mistake
Taking it as the telescope length.
Correct answer: C) Diameter of the graduated circle of its lower plate is 10 cm