Category: Surveying

A. error due to curvature only
B. error due to refraction only
C. error due to both curvature and re-fraction
D. none of the above

A. Tracing paper method
B. Bessels method
C. Lehman’s method
D. all of the above

A. A contour is not necessarily a closed curve
B. A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour
C. Two contours of different elevations do not cross each other except in case of an overhanging cliff
D. All of the above statements are correct

A. azimuth
B. declination
C. local attraction
D. magnetic bearing

A. contour line
B. horizontal equivalent
C. contour interval
D. contour gradient

A. hypsometry
B. barometric levelling
C. spirit levelling
D. trigonometrical levelling

A. the length of telescope
B. the diameter of vertical circle
C. the diameter of lower plate
D. the diameter of upper plate

A. concave
B. convex
C. plano-convex
D. plano-concave

A. straightening the links
B. removing one or more small circular rings
C. closing the joints of the rings if opened out
D. all of the above

A. increase
B. decrease
C. not change
D. either ‘a’ or ‘b’