151. Plane tabling is a method of surveying that involves:
a) Measuring horizontal distances
b) Determining elevation differences
c) Sketching the features of the survey area
d) Setting up a theodolite
View Answer
Correct answer: c) Sketching the features of the survey area
Explanation: Plane tabling is a graphical method where the surveyor sketches the features of the survey area directly on a sheet of paper placed on a horizontal surface.
152. The instrument used in plane tabling is called a:
a) Transit
b) Level
c) Plane table
d) Total station
View Answer
Correct answer: c) Plane table
Explanation: Plane tabling requires a special instrument known as a plane table, which is a flat, portable drawing board with a built-in leveling mechanism.
153. The principle of plane tabling is based on:
a) Trigonometry
b) Geometry
c) Compass bearings
d) Magnetic declination
View Answer
Correct answer: b) Geometry
Explanation: Plane tabling relies on the principles of geometry to establish accurate measurements and drawings of the survey area.
154. The process of orientation in plane tabling involves:
a) Leveling the instrument
b) Aligning the instrument with a known point
c) Measuring distances to neighboring points
d) Taking magnetic readings
View Answer
Correct answer: b) Aligning the instrument with a known point
Explanation: To orient the plane table, the surveyor aligns it with a known point by sighting through the instrument and pointing it towards the reference point.
155. The primary advantage of plane tabling is:
a) High accuracy in measurements
b) Quick setup and operation
c) Ability to measure long distances
d) Automatic data recording
View Answer
Correct answer: b) Quick setup and operation
Explanation: Plane tabling allows for rapid setup and operation, making it suitable for quick surveys and small-scale mapping tasks.
156. The accuracy of measurements in plane tabling depends on:
a) The length of the measuring tape used
b) The accuracy of the leveling bubble
c) The scale of the drawing
d) The skill of the surveyor
View Answer
Correct answer: d) The skill of the surveyor
Explanation: The accuracy of measurements in plane tabling is primarily dependent on the skill and experience of the surveyor in taking precise readings and making accurate sketches.
157. Which of the following is a common accessory used in plane tabling?
a) Laser rangefinder
b) Electronic theodolite
c) Prism pole
d) Alidade
View Answer
Correct answer: d) Alidade
Explanation: An alidade is a sighting device that is commonly used with a plane table to measure angles and perform angular observations.
158. The primary limitation of plane tabling is:
a) Limited accuracy in measurements
b) Time-consuming setup process
c) Inability to measure distances
d) Dependency on weather conditions
View Answer
Correct answer: a) Limited accuracy in measurements
Explanation: Plane tabling has limitations in achieving high levels of accuracy compared to other surveying methods such as total stations or GPS.
159. The main application of plane tabling is in:
a) Topographic surveys
b) Boundary surveys
c) Hydrographic surveys
d) Geodetic surveys
View Answer
Correct answer: a) Topographic surveys
Explanation: Plane tabling is commonly used for topographic surveys where the focus is on capturing and representing the natural and man-made features of the survey area.
160. The term “radiation” in plane tabling refers to:
a) The spread of radio waves
b) The process of locating a point from the instrument station
c) The emission of gamma rays
d) The measurement of radioactive materials
View Answer
Correct answer: b) The process of locating a point from the instrument station
Explanation: In plane tabling, radiation refers to the process of locating points on the drawing by aligning the instrument with the instrument station.
