AE-JE Foundation CE: Surveying Quiz 7

The vernier employed in Abney level is

If i is the stadia interval, S is the staff intercept, f is the focal length of the objective, d is the distance of vertical axis of the instrument from the optic centre, then the stadia interval factor of the tacheometer is given by:

The process of locating the instrument station occupied by the plane table by drawing rays from the stations whose positions have already been plotted on the drawing sheet is known as __________.

Two points A and B are 1000 m apart across a river. The reciprocal levels measured are:

The true level difference between A and B is:

In a surveyor’s compass

During a chain survey, stations A and B were taken on opposite sides of an obstacle. A point C was chosen such that AC was perpendicular to BC at C. If AC = 3m and BC = 4m, the obstructed length AB is ____________ m.

A line of 5cm has shrunk to 4.0 cm. The correct length corresponding to the measured length of 80m is _________ m.

Calculate the error (in mm) in the linear measurement of offset, if the length of the offset is 80 m, then the accuracy in the measurement of the length is1 cm in
60 m.

Which one is the upper limit of survey area (square kilometer) for use of plane survey?