181. The concept of “meridional convergence” in plane tabling refers to:
a) The angular convergence of meridian lines on the survey sketch
b) The merging of survey lines at a single point on the survey sketch
c) The deviation of the magnetic north from the true meridian
d) The convergence of the instrument setup towards the meridian direction
View Answer
Correct answer: a) The angular convergence of meridian lines on the survey sketch
Explanation: Meridional convergence in plane tabling refers to the angular convergence of meridian lines on the survey sketch, which is caused by the convergence of meridians on the Earth’s surface.
182. The process of “ray shading” in plane tabling involves:
a) Drawing rays of light on the survey sketch
b) Adding shading effects to the survey sketch for visual appeal
c) Locating points on the survey sketch using rays of light
d) Calculating the solar radiation received by different objects in the survey area
View Answer
Correct answer: b) Adding shading effects to the survey sketch for visual appeal
Explanation: Ray shading in plane tabling involves adding shading effects to the survey sketch to enhance its visual appeal and readability.
183. The concept of “subsidiary stations” in plane tabling refers to:
a) Additional instrument stations used to increase accuracy
b) Temporary reference points established for the survey
c) Secondary survey lines drawn on the survey sketch
d) Alternate positions for setting up the instrument
View Answer
Correct answer: b) Temporary reference points established for the survey
Explanation: Subsidiary stations in plane tabling are temporary reference points that are established in addition to the primary instrument stations to assist in the surveying process.
184. The process of “resection with subsidiary stations” in plane tabling involves:
a) Locating the instrument station using subsidiary points
b) Taking readings from both the forward and backward directions
c) Balancing the instrument setup with equal readings on both sides
d) Repeating the traversing process from the last point to the first point
View Answer
Correct answer: a) Locating the instrument station using subsidiary points
Explanation: Resection with subsidiary stations in plane tabling involves locating the instrument station by sighting from subsidiary points and aligning the instrument accordingly.
185. The term “stereoscopic vision” in plane tabling refers to:
a) The ability to see in three dimensions
b) The use of stereoscopic lenses for measurements
c) The perception of depth on the survey sketch
d) The process of interpreting aerial photographs in surveying
View Answer
Correct answer: c) The perception of depth on the survey sketch
Explanation: Stereoscopic vision in plane tabling refers to the ability to perceive depth and three-dimensional features on the survey sketch, aiding in the accurate representation of the survey area.
186. The concept of “tacheometric surveying” in plane tabling refers to:
a) The use of telescopic alidades for angular measurements
b) The process of measuring slope distances in surveying
c) The estimation of distances by observing stadia readings
d) The calculation of elevations using the vertical angle measurements
View Answer
Correct answer: c) The estimation of distances by observing stadia readings
Explanation: Tacheometric surveying in plane tabling involves estimating distances by observing stadia readings through telescopic alidades, which allows for faster and more efficient measurements.
187. The process of “radiation with a fore sight” in plane tabling involves:
a) Locating a point from the instrument station using forward measurements
b) Aligning the instrument with a known reference point in the forward direction
c) Establishing the position of the instrument station with forward observations
d) Determining the direction of the magnetic north in forward
View Answer
Correct answer: a) Locating a point from the instrument station using forward measurements
Explanation: Radiation with a fore sight in plane tabling involves locating a point from the instrument station by using forward measurements, i.e., sighting from the instrument station to the point of interest in the forward direction.
188. The concept of “balancing the traverse” in plane tabling refers to:
a) Adjusting the leveling bubble
b) Equalizing the forward and backward measurements
c) Repeating the traversing process from the last point to the first point
d) Ensuring the closure of the traverse loop
View Answer
Correct answer: d) Ensuring the closure of the traverse loop
Explanation: Balancing the traverse in plane tabling refers to ensuring the closure of the traverse loop by adjusting the measurements or observations, thereby minimizing the errors and inaccuracies.
189. The term “alidade” in plane tabling refers to:
a) The central point on the survey sketch
b) The transparent sheet used for tracing
c) The telescopic sighting device on the plane table
d) The line connecting two instrument stations
View Answer
Correct answer: c) The telescopic sighting device on the plane table
Explanation: Alidade in plane tabling refers to the telescopic sighting device attached to the plane table, which is used for sighting and measuring angles during the surveying process.
190. The concept of “giant striding” in plane tabling refers to:
a) Taking large strides to cover long distances during the survey
b) Measuring the length of a stride for distance estimation
c) Using a giant compass for angular measurements
d) Marking large features on the survey sketch
View Answer
Correct answer: d) Marking large features on the survey sketch
Explanation: Giant striding in plane tabling refers to marking large features, such as prominent landmarks or objects, on the survey sketch to enhance its clarity and provide additional reference points.
