The optical square is used to measure angles by

Related MCQs

• The method of reiteration of measuring horizontal angles is generally preferred when several angles are to be measured at a particular station.
• The difference between the sum of the angles of a apherical triangle on the earth's surface and the angles of the corresponding plane triangle for every 195.5 km2 of area is only
• An optical square is used for the same purpose as the cross-staff, but it is more accurate.
• The angle of intersection of the two plane mirrors of an optical square is
• The index glass in an optical square is
• The angle of intersection of the horizon glass and index glass in an optical square is
• In an optical square, the angle between the first incident ray and the last reflected ray is
• When the object lies on the left hand side of the chain line, then while taking offset with an optical square, it is held in
• The horizon glass in an optical square is
• The traversing by the method of deflection angles is chiefly used in