Surveying and Geomatics Exam Prep
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Surveying and Geomatics Exam Prep
English 21 leveled MCQs Free
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10 marks Long answer
Explain different type of surveying in detail.
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Different types of surveying include land surveying, engineering surveying, hydrographic surveying, and geodetic surveying, each serving distinct purposes.
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10 marks Long answer
Explain reciprocal levelling in detail with a diagram and mathematical derivation.
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Reciprocal leveling is a method used to determine the height difference between two points by observing both from each location; it involves specific calculations and a diagram for clarity.
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10 marks Long answer
Write down the definition (i) Latitude (ii) Departure (iii) Reduce level (iv) Bowditch's rule (v) Transit rule (vi) fore sight and back sight (vii) transiting (viii) Swinging the telescope (ix) vertical axis (x) temporary adjustment.
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Definitions include: (i) Latitude - north-south distance; (ii) Departure - east-west distance; (iii) Reduced level - height above a datum; (iv) Bowditch's rule - method for adjusting traverse; (v) Transit rule - method for leveling; (vi) Fore sight - sighting towards a point; (vii) Back sight - sighting back to a refer…
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10 marks Long answer
Explain in detail the plane table surveying with three different methods.
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Plane table surveying involves using a table to directly plot points; methods include the radiation method, intersection method, and traversing method.
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10 marks Long answer
The following staff readings were observed successively with a level the instrument is moved by third sixth and eighth readings 2.228: 1.606: 0.988: 2.090: 2.864: 1.262: 0.602: 1.982: 1.044: 2.684 m enter the reading in record book and calculate R.L. if the first reading was taken at a B.M of 432.383 m.
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Record the readings and calculate the reduced levels based on the first reading from the benchmark.
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10 marks Long answer
Explain the methods of locating contours.
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Methods of locating contours include direct leveling, interpolation, and using contour maps.
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10 marks Long answer
Derive the expression for determining the elevation of an object when its base is inaccessible, instrument stations and the elevated object are not in the same vertical plane.
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Derive the elevation expression using trigonometric principles involving angles of elevation and distances.
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4 marks Medium answer
Discuss the different sources of errors in surveying with examples.
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Sources of errors in surveying include instrumental errors (e.g., miscalibration), observational errors (e.g., parallax), and natural errors (e.g., atmospheric conditions).
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4 marks Medium answer
Discuss the different methods for calculating area.
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Methods for calculating area include the trapezoidal rule, Simpson's rule, and triangulation.
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4 marks Medium answer
What is contour, write down the characteristics and use of contour line?
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A contour is a line on a map connecting points of equal elevation; characteristics include spacing and shape, and they are used for representing terrain.
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4 marks Medium answer
Discuss the causes of curvature and refraction in leveling and state their combined correction.
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Curvature and refraction cause errors in leveling due to the Earth's curvature and atmospheric bending of light; their combined correction accounts for both effects.
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4 marks Medium answer
Explain different types of leveling.
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Types of leveling include differential leveling, spirit leveling, and trigonometric leveling.
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4 marks Medium answer
What do mean by triangulation. Write down its objectives and also discuss the types of triangulation?
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Triangulation is a surveying method using triangles to determine distances and angles; objectives include accurate location determination, and types include primary and secondary triangulation.
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4 marks Medium answer
Describe the temporary adjustments of a theodolite in sequence.
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Temporary adjustments of a theodolite include setting up the instrument level, centering over the point, and aligning the telescope.
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2 marks Short answer
What is the second principle of surveying?
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The second principle of surveying states that the position of a point is determined by measuring distances and angles from known points.
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2 marks Short answer
What is a difference between plane surveying and geodetic surveying?
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Plane surveying assumes the Earth is flat, while geodetic surveying accounts for the Earth's curvature.
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2 marks Short answer
What is the difference between a plan and a map?
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A plan is a detailed representation of a small area, while a map is a broader representation of a larger area.
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2 marks Short answer
What is magnetic declination?
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Magnetic declination is the angle between magnetic north and true north.
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2 marks Short answer
State Simpson’s Rule for area calculation and its main condition.
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Simpson’s Rule states that the area under a curve can be approximated by dividing it into an even number of intervals and applying a specific formula; it requires that the number of intervals be even.
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2 marks Short answer
Write down the objectives of levelling.
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The objectives of levelling include determining the elevation of points, establishing a horizontal plane, and providing a reference for construction.
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2 marks Short answer
Write down the different purpose for which the theodolite can be used.
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Theodolites can be used for measuring horizontal and vertical angles, surveying, and aligning structures.
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