1) What is a Contour Line?
Ans: A line joining points of equal elevation is known as a Contour Line.
2) What is least count of Theodolite and compass?
Ans:
Theodolite: least count is 20” (20 second)
Compass: least count is 30’ (30
minute)
3) The image formed by the objective in the
plane of cross hairs is ?
Ans:
Real and inverted.
4) The vertical distance above or below the
datum is called ?
Ans: a) reduced level of the point.
b) Elevation of the point.
5)
The curve used for ideal transition curve is known as?
Ans:
Lemniscate.
6) The principle of Tachometry is used?
Ans:
For location contours.
7) The multiplying constant for the Tachometer
is generally kept as?
Ans:
100.
8) What is the True Meridian?
Ans: True meridian is a line joining North and
South poles.
9) Define Bearing?
Ans:
Bearing is an angle made by a common line with meridian line.
10) What a Bench Mark (BM)?
Ans:
Bench mark is a point with known Elevation.
11) What is Back Sight (BS)?
Ans: The 1st reading after setting an
instrument is called Back Sight. This is taken at known point like (B.M).
12)
What do you know about line of Collimation?
Ans:
It is an imaginary line joining the intersection of the cross hair to the
optical center of the object glass.
13)
Mention the main instrument used for leveling?
Ans:
Basically for leveling we used level machine and leveling staff (staff rod).
14)
How do we find height of instrument?
Ans:
Height of instrument = Bench mark + Back sight.
H.I =BM + BS.
15)
What is the main difference between
Contour line and Contour map?
Ans:
contour line is a line I plane having the some elevation at each point. Contour
map is a topographic map on which the shape of the land surface is shown by
contour lines.