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A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is
A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06.
A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06.
See lessThe desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be
Question: The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be13. 75 m3.
Question: The desired sensitivity of a bubble tube with 2 mm divisions is 30″. The radius of the bubble tube should be13. 75 m3.
See lessKeeping the instrument height as 1 m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than
If you know the elevation of A, called E(A), you can calculate the elevation of B, called E(B), as BS -FS + E(A). But BS + E(A) = HI, the height of the instrument or the elevation of the line of sight directed from the level.
If you know the elevation of A, called E(A), you can calculate the elevation of B, called E(B), as BS -FS + E(A). But BS + E(A) = HI, the height of the instrument or the elevation of the line of sight directed from the level.
See lessGeodetic surveying is undertaken
The surveys in which the curvature of the earth is taken into consideration are known as geodetic surveying. All lines lying on the surface are curved lines and the triangles are spherical triangles. It is considered to be geodetic when the limit of the survey is more than 250 km2.
The surveys in which the curvature of the earth is taken into consideration are known as geodetic surveying. All lines lying on the surface are curved lines and the triangles are spherical triangles. It is considered to be geodetic when the limit of the survey is more than 250 km2.
See lessIn optical reading instruments
Five optical instruments are cameras, periscopes, magnifying glasses, telescopes, and microscopes.
Five optical instruments are cameras, periscopes, magnifying glasses, telescopes, and microscopes.
See lessA uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to
Expert-Verified Answer (A) Cumulative, +0.11 m**the correct option is (A) Cumulative, +0.11 m, signifying that the cumulative error in the slope measurement is approximately 0.11 m, with a slight overestimation.
Expert-Verified Answer
See less(A) Cumulative, +0.11 m**the correct option is (A) Cumulative, +0.11 m, signifying that the cumulative error in the slope measurement is approximately 0.11 m, with a slight overestimation.
For a curve of radius 100 m and normal chord 10 m, the Rankine's deflection angle, is
is given as 100 m. Therefore, the correct Rankine's deflection angle is approximately 0°25'. 95, making
is given as 100 m. Therefore, the correct Rankine’s deflection angle is approximately 0°25′. 95, making
See lessThe latitude of a traverse leg is obtained by multiplying its length by
The latitude of a traverse line is obtained by multiplying its length with the cosine of its reduced bearing.
The latitude of a traverse line is obtained by multiplying its length with the cosine of its reduced bearing.
See lessThe angle between two plane mirrors of optical square, is
45 degrees Optical Square: An optical square is a small pocket instrument, slightly larger than a watch. It is used for setting out right angles. There are two mirrors placed vertically above the base at 45 degrees to each other which are used in offsetting.
45 degrees
See lessOptical Square: An optical square is a small pocket instrument, slightly larger than a watch. It is used for setting out right angles. There are two mirrors placed vertically above the base at 45 degrees to each other which are used in offsetting.
If the rate of gain of radial acceleration is 0.3 m per sec3 and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is
The ratio of the length of the transition curve of the same radius on road to railway is approximately 3.828.
The ratio of the length of the transition curve of the same radius on road to railway is approximately 3.828.
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