Generally, the deflection angle is measured twice, once with the telescope normal and once with the telescope reversed.

Related MCQs

• The deflection angle for any chord is equal to the deflection angle for the proceeding chord minus the tangential angle for that chord.
• If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to i) altitude bubble on index frame ii) altitude bubble on index frame if it is to be used as a level iii) altitude bubble on telescope iv) altitude bubble on telescope if it is to be used as a level The correct answer is
• In modern telescope internal focusing telescope is used.
• The angle of field of the telescope
• The magnification of a telescope is the ratio of the angle subtended at the eye by the virtual image of the object to that subtended by the object.
• The deflection angle may have any value between
• A deflection angle in a traverse is equal to the
• A deflection angle is
• The deflection angle may be directly obtained by setting the instrument to read
• In order to fix up the directions of the survey lines in the compass survey, the horizontal angle between the survey line and a fixed line of reference is measured. This fixed line reference is the magnetic meridian.