Q. A tacheometer is setup at an intermediate point on a traverse course PQ and the following observations are made on a staff held vertical. Staff Station Vertical Angle Staff Intercept Axial Hair Readings P + 9º30′ 2.250 2.105 Q + 6º00′ 2.055 1.975. The constants are 100 and 0. Compute the length PQ and the reduced level of Q. RL of P = 350.50 m.

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Q. Stadia readings were taken with a theodolite on a vertical staff with the telescope inclined at an angle of depression of 3º30′. The staff readings were 2.990, 2.055 and 1.120. The reduced level of the staff station is 100.000m, and the height of the instrument is 1.40 m. What is the reduced level of the ground at the instrument? Take constants as 100 and zero.

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Q. The following readings were taken with a tachometer on to a vertical staff. Horizontal Distance Stadia Readings 46.20 m 0.780; 1.010; 1.240 51.20 m 1.860; 2.165; 2.470. Calculate the tacheometric constants.

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Q. The two targets are at a distance s apart, and each at s/2 from the centre, i.e. vertical axis. The horizontal angle α is measured carefully by means of a theodolite. Then what is the value of D in the subtense bar method?

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Q. In the subtense bar method, the horizontal angle subtended by two targets fixed on a horizontal bar at a known distance apart is measured at instrument station by theodolite.

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Q. Distance and elevation formulae for fixed hair method assuming the line of sight as horizontal and considering an external focusing type telescope is D = Ks + C, where C is _______

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Q. For anallactic lens in D = Ks + C, which of the following is zero?

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Q. Distance and elevation formulae for fixed hair method assuming line of sight as horizontal and considering an external focusing type telescope is D = Ks + C. where K is _______

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Q. In fixed hair method, the distance between _______ hair and__________ hair are fixed.

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Q. For short sights of about _____ m or less, an ordinary levelling staff may be used. For long sights, special staff called stadia rod is generally used.

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Q. The magnifying power of the eyepiece is also smaller than for an ordinary transit to produce a clearer image of a staff held far away.

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Q. What should be the aperture required for tacheometer?

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Q. The magnification of the telescope in tacheometer should be at least _______ to _______ diameters.

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Q. Which of horizontal hairs are equivalent in stadia diaphragm of tacheometer?

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Q. Tacheometer has ______ number of horizontal hairs.

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Q. Which of the following is the branch of angular surveying in which both the horizontal and vertical positions of points are determined from the instrumental observations, the chain surveys being entirely eliminated?

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Q. Using tacheometric methods, elevations can also be determined.

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Q. Which of the following is an indirect method of surveying?

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Q. If the ground is undulating, rough, difficult and inaccessible. Under these circumstances _________ methods are used to obtain distances.

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Q. Horizontal distances are measured by direct methods, i.e. laying of chains or tapes on the ground.

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