Leveling is used in surveying to determine the vertical distance (elevation) between two or more points. This technique is essential for projects such as road construction, drainage systems, and building foundations where accurate elevation data is critical.
Which instrument is used for measuring horizontal distances?
A Chain
B Theodolite
C Compass
D Total station
A chain is a simple and traditional tool used for measuring horizontal distances. It is typically used in chain surveying and is suitable for short‐distance measurements. Chains are ideal for small, simple surveys where high precision is not required.
What is the purpose of a theodolite in surveying?
A To map contours
B To measure horizontal distances
C To measure angles
D To measure elevation
Theodolites are used to measure both horizontal and vertical angles. These measurements are crucial for tasks like triangulation, traverse surveying, and construction projects, ensuring precise alignment and positioning of structures and features.
What does a total station measure?
A Vertical distances only
B Angles and distances
C Horizontal distances only
D Horizontal angles only
A total station is an electronic/optical device used to measure both horizontal and vertical angles, as well as distances, simultaneously. This feature makes it a versatile instrument, widely used in modern surveying, including topographic mapping and construction layout.
What is the purpose of contour lines on a map?
A To show boundaries
B To measure distances
C To indicate elevation changes
D To plot cities
Contour lines represent points of equal elevation on a map. They are used to visualize the topography of the land, such as hills, valleys, and slopes. The spacing between lines indicates the steepness of the terrain, with closely spaced lines showing steeper slopes.
What method is commonly used to measure large areas in surveying?
A Plane table surveying
B Chain surveying
C Compass surveying
D Triangulation
Triangulation involves measuring the angles between multiple points and applying trigonometry to calculate distances and areas. It is used for large-scale surveys, especially in geodetic surveys and mapping large regions with high precision.
Which instrument measures vertical angles in surveying?
A Theodolite
B GPS
C Plane table
D Compass
Theodolites are used to measure both horizontal and vertical angles. They are essential for setting accurate elevations and alignment during construction, navigation, and surveying activities like leveling and setting out.
What is triangulation used for in surveying?
A Measuring distances only
B Creating topographic maps
C Determining location and distances
D Measuring volume of earthwork
Triangulation is a method in which the positions of points are determined by measuring angles from known points. This technique helps surveyors establish control points and distances over large areas, especially useful in mapping and large-scale surveys.
What is the main purpose of GPS in surveying?
A To measure angles
B To calculate areas
C To plot boundaries
D To determine precise locations
GPS (Global Positioning System) is used in surveying to determine accurate geographic locations, including latitude, longitude, and elevation. It relies on satellite signals and is used for large-scale surveys, geodetic work, and for tracking construction equipment.
What does the plane table in surveying help to do?
A Level the instrument
B Plot data directly in the field
C Measure angles
D Measure distances
A plane table is used for plotting survey data directly in the field. Surveyors draw lines and mark features on the map while taking measurements, making it particularly useful for rapid fieldwork and simple surveys.
What is the purpose of a prism in total station surveying?
A To reflect the EDM signal
B To record data
C To determine elevation
D To measure angles
A prism is used in total station surveying to reflect the Electronic Distance Measurement (EDM) signal back to the total station. This enables precise distance measurements, as the instrument calculates the time it takes for the signal to return to the prism.
What is an EDM instrument used for in surveying?
A Measuring height
B Measuring area
C Measuring distances
D Measuring angles
EDM (Electronic Distance Measurement) instruments are used to measure the distance between two points. These devices send a signal, typically laser or infrared, and calculate the time it takes for the signal to return, offering highly accurate distance measurements.
Which method is used to calculate the area of an irregular plot in surveying?
A Chain surveying
B Plane table
C Triangulation
D Simpson’s rule
Simpson’s rule is a mathematical method used to calculate the area of irregular plots by dividing them into smaller, easily measurable shapes like trapezoids or triangles, offering high accuracy.
What is the primary purpose of hydrographic surveying?
A Calculating earthwork volumes
B Measuring the depth of water bodies
C Mapping land contours
D Measuring vertical angles
Hydrographic surveying is used to measure underwater features, including the depth of water bodies, shape of the seabed, and location of submerged objects. This data is essential for navigation, marine construction, and dredging projects.
What is the function of a cadastral survey?
A Determining property boundaries
B Mapping terrain
C Plotting roads
D Measuring angles
A cadastral survey is primarily used to establish and document property boundaries. It is essential for land ownership registration, resolving property disputes, and urban planning, providing legal clarity on land boundaries and ownership.