Enlist any eight components of transit theodolite and write their functions.
Components of transit theodolite and their functions –
Sr.No.
|
Component
|
Function
|
1 | Leveling head |
To support the main working parts of the instrument and screws on to a tripod.
|
2 |
Leveling base and trivet
|
To level the instrument.
|
3 |
Movable Head
|
To center the vertical axis accurately over the station point.
|
4 |
Lower Plate
|
It carries a graduated circular arc which is used for taking readings.
|
5 |
Upper Plate
|
It carries an index and vernier to read fine reading on graduated horizontal circle.
|
6 |
Standards or ‘A’ frame
|
To support the telescope, and vertical circle.
|
7 |
Vertical circle
|
It is provided with circular graduated arc which is generally divided into four quadrants and is used for measurement of vertical angle.
|
8 |
Telescope
|
For observation and bisection of the object.
|
9 |
Plate bubble
|
For leveling the instrument.
|
10 |
Altitude bubble
|
For leveling the instrument at the time of taking vertical angle.
|
11 |
Compass
|
To take bearing of a line.
|
12 |
Lower clamp and Lower Tangent screw
|
To fix the lower plate and slow movement of lower plate.
|
13 |
Upper clamp and Upper Tangent screw
|
To fix the upper plate and slow movement of upper plate.
|
14 |
Spindles
|
Inner spindle and outer spindles are coaxial.
|