JNTU B.Tech II SURVEYING Previous Question Paper (November/December - 2018 - R13)

The distance between two points measured with a 20m chain was recorded as 350m. It was afterwards found that the chain was 3 cm too long. What was the true distance between the points?

What do you mean by great triangle and great circle?

State Simpson’s rule. What are the considerations and limitations of this rule?

List out the uses of contours.

Differentiate between one level section and two level sections.

What is a sub-tense bar?

What do mean by the term deflection angle. How it is measured using theodolite instrument?

Discuss briefly the field checks in triangulation.

Write an expression for calculation of apex and ver-sine distance in a simple circular curve.

List the advantageous of total station instrument.

Bring out the classification of surveying using primary and secondary methods.

With a neat sketch explain the different accessories used in plane table survey?

The following bearings were observed in running a compass traverse. Find the correct fore, back bearing and true bearings of the lines, given that the magnetic declination is 10° 30′E.

The distance measured between two points on a sloping ground is 450m. Find the correction to be applied and the horizontal distance if (i) the angle of the slope is 10° (ii) the slope is 1 in 5 and (iii) the difference in elevation between points is 45m.

In running a fly levels from a bench – mark of RL 139.605m, the following readings were obtained: Backsight - 1.445, 2.595, 1.315, 2.825; Foresight - 0.475, 1.135, 0.495. From the last position the instrument, six pegs at 15-m intervals are to be set out on a uniform rising gradient of 1 in 50; the first peg is to have an RL of 143.000. Enter the readings on a level field book and work out the staff readings on the top of pegs.

Explain with neat sketches the characteristics of contour lines.

The following staff readings were taken with a level. The instrument having been shifted after 4th, 7th and 10th readings. R.L. of the starting BM is 100.00m. Enter the readings in the form of a level by rise and fall method and apply usual checks: 2.65, 3.74, 3.83, 5.27, 4.64, 0.38, 0.96, 1.64, 2.84, 3.48, 4.68 and 5.26.

In brief elaborate the procedure for contour Interpolation.

The following offset were taken from a chain line to an irregular boundary line: Chainage(m) - 0, 6.5, 16.2, 27.2, 39.6; Offset (m) - 3.5, 4.75, 5.2, 6.30, 7.36. Calculate the area between the chain line and the boundary.

Derive an equation for two level section having a transverse slope for calculation of cross-sectional area.

Two instrument stations were selected 150m apart in the same vertical plane as the object. The vertical angles observed to the two stations were 12° 13′30″ and 9° 10′40″. The readings on a staff held at a bench mark of RL 1080.00m were 2.35 and 1.05m from the stations, the instrument reading being higher for the station further from the object. Find the RL of the object if the vertical angles were read on mark 5m from the ground.

List the fundamental lines of a theodolite. Explain briefly the desired relationships.

A tacheometer is fitted with an anallactic lens and the constants are 100 and 0. The reading corresponding to the cross-wire on a staff held vertical on a point B was 2.295m when sighted from A. If the vertical angle was + 25° and the horizontal distance AB was 150m, calculate the stadia wire readings and thus show that the two intercept intervals are equal. Using these values calculate the level of B if that of A was 50.0m and the height of the instrument is 1.15m.

Explain the measurement of horizontal angles in a theodolite instrument.

A curve of 400m radius and deflection angle 85° is to be set out on horizontal plane. Use deflection angle method for setting out of curve. The chainage of the tangent point is 1008.65m. Tabulate the angles and the theodolite reading for locating points on the curve at 20-m peg intervals.

Describe briefly the various methods of GPS surveying. Also give a brief account of the applicability and limitations of each technique.

Observations were made from a station P on a sub-tense bar held at station Q. the vertical angle was 8° 15′. The number of revolutions of the micrometer screw was 21.35. The instrument constants were 100 and 0.4. The intercept was kept at 3m. Find the horizontal distance P and Q.

Describe the working procedure of total station instrument for determination of area using coordinate method.