Question

The size of the theodolite is defined according to the

• A. Height of the stand
• B. Length of the telescope
• C. weight of the theodolite
• D. Diameter of graduated horizontal circle

Hint:

The "size" of a theodolite is a measure of its precision, not its physical bulk.
Size of Theodolite = Diameter of the horizontal circle.
A larger circle means more room for degree markings, which means higher potential precision.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks for the parameter that is used to specify the "size" of a theodolite.

Step 2: Detailed Explanation:
Theodolites are precision instruments used for measuring horizontal and vertical angles. Their size and precision are closely related. The primary component that determines the instrument's ability to be read accurately is the main graduated circle used for measuring horizontal angles.
The

size of a theodolite is specified by the diameter of its graduated horizontal circle (the lower plate).
For example, a "20 cm theodolite" is one in which the diameter of the horizontal circle is 20 cm. A larger diameter allows for finer graduations and thus more precise angle measurements.
The other options like the length of the telescope, height of the stand, or weight are physical characteristics but do not define the instrument's designated size in standard surveying terminology.

Step 3: Final Answer:
The size of the theodolite is defined according to the diameter of the graduated horizontal circle.