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To measure a vertical angle, the instrument should be levelled with reference to the line of sight.

To measure a vertical angle, the instrument should be levelled with reference to the line of sight. Correct Answer False

To measure a vertical angle, the instrument should be levelled with reference to the altitude bubble. When the altitude bubble is on the index frame procedure starts.

Related Questions

The following readings were obtained during differential levelling. Reduced Level (RL) of point A is 240,000 m. The fore sight and back sight between points A and TPI is 1.420 m and 2.024 m, respectively. Fore sight and back sight between points TPI and TP2 is 2.100 m and 1.986 m, respectively. The back sight from B is 1.722 m. These are marked on the given figure. What is the RL at turning point - 2 (TP2)? All values are in metres.
If the observed back sight and fore sight are x1 and x2. The correction back sight on A will be equal to x1-y1, where y1= D1 tan i°. The correct fore sight on B will be equal to x2-y2 where, y2 = D2 tan i°. Then what is the correction difference in level between A and B.
If the observed back sight and fore sight are x1 and x2. The correction back sight on A will be equal to x1-y1, where y1= D1 tan i°. The correct fore sight on B will be equal to x2-y2 where, y2 = D2 tan i°. Then what is the correction difference in level between A and B, if D1 = D2?
If the observed back sight and fore sight are 20 m and 18 m. The correction back sight on A will be equal to 16 m, The correct fore sight on B will be equal to 14 m where then what is the correction difference in level between A and B?
Given below are two statements, one levelled as Assertion (A) and the other levelled as Reason (R) : Assertion (A): Social contract theory associated with modern moral and political theory was rejected by Hume on the ground of having no historical reference. Reason (R): Social contract theory is the view that persons' moral obligations are dependent upon an agreement among them. But there is no historical evidence of when the first contract was signed in the context of the two statements, which one of the following is correct?
A line is perpendicular to horizontal plane, the perpendicular distance from the line to vertical plane is 8 inches and perpendicular distance from the line to profile plane is 5 inches. What is the distance from the line to vertical reference line if it is viewed from front view?
A line is perpendicular to profile plane, the perpendicular distance from the line to vertical plane is 10 cm and perpendicular distance from the line to horizontal plane is 5 cm. What is the distance from the line to vertical reference line if it is viewed from a side view?
A line of length 15 cm is parallel to horizontal plane and vertical plane and 10 cm away from vertical plane. The distance from line to vertical reference line in side view will be __________
Angle ‘A’ of a cyclic quadrilateral ABCD is 53° less then angle B. Angle B is twice of angle C and angle C is 40° more than angle D. What would be the measure of angle A?
Given below are two statements, one levelled as Assertion (A) and the other levelled as Reason (R): Assertion (A): All events seem entirely loose and separate. They seem conjoined but never connected. Reason (R): Causal relationships are contingent and probable. In the context of the two statements, which one of the following is correct?