Curvature correction to a staff reading in a differential levelling su

1.	Curvature correction to a staff reading in a differential levelling survey is
A.	always subtractive
B.	always zero
C.	always additive
D.	dependent on latitude
Answer» B. always zero

Discussion

No Comment Found

Related MCQs

Following bearings are observed while traversing with a compass. <br><table class="wp-block-table"><tbody><tr><td><strong>Line Fore Bearing </strong></td><td> <strong>Back Bearing </strong></td></tr><tr><td>AB 126 45' </td><td>308 00' </td></tr><tr><td>BC 49 15' </td><td>227 30' </td></tr><tr><td>CD 340 30' </td><td>161 45' </td></tr><tr><td>DE 258 30' </td><td>78 30' </td></tr><tr><td>EA 212 30' </td><td>31 45' </td></tr></tbody></table> <br>After applying the correction due to local attraction, the corrected fore bearing of line BC will be
The bearings of two inaccessible stations, S<sub>1</sub> (Easting 500 m, Northing 500 m) and S<sub>2</sub> (Easting 600 m, Northing 450 m) from a station S<sub>3</sub> were observed as 225 and 153 26' respectively. The independent Easting (in m) of station S<sub>3</sub> is :
A road is provided with a horizontal circular curve having deflection angle of 55 and centre line radius of 250 m. A transition curve is to be provided at each end of the circular curve of such a length that the rate of gain of radial acceleration is 0.3 m/s<sup>3</sup> at a speed of 50 km per hour. Length of the transition curve required at each of the ends is
Group I lists tool/instrument while Group II lists the method of surveying. Match the tool/instrument with the corresponding method of surveying. <br><table class="wp-block-table"><tbody><tr><td><strong>Group I </strong></td><td><strong>Group II </strong> </td></tr><tr><td>P. Alidade </td><td>1. Chain surveying </td></tr><tr><td>Q. Arrow </td><td>2. Lavelling </td></tr><tr><td>R. Bubble tube </td><td>3. Plain table surveying </td></tr><tr><td>S. Stadia hair </td><td>4. Theodolite surveying </td></tr></tbody></table>
Which of the following errors can be eliminated by reciprocal measurements in differential levelling ? <br>I Error due to earth s curvature <br>II Error due to atmospheric refraction
Determine the correctness or otherwise of the following Assertion (A) and the Reason (R) : <br><b>Assertion (A) :</b> Curvature correction must be applied when the sights are long <br><b>Reason (R) :</b> Line of collimation is not a level line but is tangential to the level line.
The plan of a survey plotted to a scale of 10 m to 1 cm is reduced in such a way that a line originally 10 cm long now measures 9 cm. The area of the reduced plan is measured as 81 cm<sup>2</sup>. The actual (m<sup>2</sup>) of the survey is
Two Pegs A and B were fixed on opposite banks of a 50 m wide river. The level was set up at A and the staff readings on Pegs A and B were observed as 1.350 m and 1.550 m, respectively. Thereafter the instrument was shifted and set up at B. The staff readings on Pegs B and A were observed as 0.750 m and 0.550 m, respectively. If the R.L. of Peg A is 100.200 m, the R.L. (in m) of Peg B is ______ .
In a leveling work, sum of the Back Sight (B.S.) and Fore Sight (F.S.) have been found to be 3.085 m and 5.645 m respectively. If the Reduced Level (R.L.) of the starting station is 100.000 m, the R.L. (in m) of the last station is ______ .
A theodolite is set up at station A and a 3 m long staff is held vertically at station B. The depression angle reading at 2.5 m marking on the staff is 6 10'. The horizontal distance between A and B is 2200 m. Height of instrument at station A is 1.1 m and R.L. of A is 880.88 m. Apply the curvature and refraction correction, and determine the R.L. of B (in m).

Curvature correction to a staff reading in a differential levelling survey is

Discussion

No Comment Found

Related MCQs

Reply to Comment