Q. For measuring an angle to the highest degree of precision, several sets of repetitions are usually taken.

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Q. In first method of taking single set, after keeping the telescope normal throughout we measure the angle clockwise by 6 repetitions. We obtain the first value of the angle by dividing the final reading by _______

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Q. While measuring the set of observations, the transit should be levelled each time for high degree of precision.

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Q. In order to measure the magnetic bearing of a line, the theodolite should be provided with ______

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Q. Direct angles are angles measured clockwise from the preceding line to the following line.

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Q. In measuring direct angles, azimuths from the back line may vary from 0° to 180°.

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Q. A deflection angle is an angle in which a survey line makes with the prolongation of the preceeding line.

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Q. How many methods are there for prolongation of a straight line?

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Q. To run a straight line between two points, when both ends are inter visible. We establish intermediate points through ________

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Q. To locate the point of intersection of two straight lines, we stretch a thread or string between two stakes, where line of sight cuts the string is over required point of intersection.

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Q. Theodolite can be used to lay off a horizontal angle.

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Q. The method of repetition is used when it is required to lay off an angle with greater precision than that possible by single observations.

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

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Q. Which of the following errors can be eliminated by a method of repetition?

i) errors due to eccentricity.
ii) errors due to in adjustments of line of collimation.
iii) error due to inaccurate graduations.
iv) error due to inaccurate bisection of the object.

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Q. Sources of errors in transit work are broadly classified into ______ types.

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Q. Error due to imperfect adjustment of plate levels comes under ________ error.

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Q. Error due to structural defects in the instrument comes under ________ error.

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Q. Error due to imperfections due to wear comes under ________ error.

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Q. Error due to the line of collimation not being perpendicular to the horizontal axis comes under ________ error.

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Q. Error due to in accurate centering comes under ________ error.

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