If during leveling the rod is not kept perfectly vertical th

If during leveling, the rod is not kept perfectly vertical, the smaller the deviation from the vertical:

a. The smaller the reading.

b. The larger the error.

c. The higher the elevation of the point.

d. Both a and c are true.

Solution

If the rod is not kept perfectly vertical, the rod reading increase with increase in deviation and this makes the elevation of the point lower.Therefore, the smaller the deviation from the vertical, smaller is the reading and hence higher is the elevation of the point. Therefore, correct option is (d)