SSC JE 2019-20: Surveying Quiz-7 (App update required to attempt this test)

At a given place when the magnetic declination was 4˚ eastward, magnetic bearing of a line was 86˚. Calculate the magnetic bearing when the declination was 2˚ westward.

The bearing of two inaccessible station A and B taken from station C were 245 and 161 respectively. The coordinates of A and B were as under

The independent coordinates of C are

In a region with magnetic declination of E, the magnetic fore bearing of a line PQ was measured as NE. there was local attraction at P. To determine correct magnetic bearing of the line, a point O was selected at which there was no local attraction. The magnetic FB of line PO and OP were observed to be SE and NW, respectively. What is true FB of line PQ?

When the bearing of a line was measured with a compass, it came to be N42°15’W. If the magnetic declination at the point is 4°45’ to the east, what will be the true bearing of the line?

The needle of a magnetic compass is horizontal at

Which one of the following is a conclusive test to determine if a station is free of local attraction?

If the sum of internal angles in a closed traverse is less than (2n – 4) right angles, what conclusions can be drawn?

The readings taken in closed traverse are shown below. The values of P, Q and, R were found to be missing. From the existing data, find out the ratio of internal angles ∠B and ∠C