161. In plane tabling, the process of intersection involves:
a) Measuring angles between points
b) Drawing lines from two instrument stations to a point of interest
c) Finding the point where two lines cross
d) Determining the height of an object
View Answer
Correct answer: c) Finding the point where two lines cross
Explanation: Intersection is a common technique used in plane tabling where lines are drawn from two instrument stations to a point of interest, and the point of intersection represents the desired location.
162. The term “traversing” in plane tabling refers to:
a) Walking along a survey line
b) Measuring horizontal distances
c) Making a series of interconnected measurements
d) Mapping underground utilities
View Answer
Correct answer: c) Making a series of interconnected measurements
Explanation: Traversing in plane tabling involves making a series of interconnected measurements and sketches to capture the details of the survey area.
163. The process of resection in plane tabling involves:
a) Determining the height of an object
b) Measuring the angle of slope
c) Establishing the location of the instrument station
d) Calculating the area of a polygon
View Answer
Correct answer: c) Establishing the location of the instrument station
Explanation: Resection in plane tabling is the process of locating the position of the instrument station on the drawing by sighting and aligning with known points.
164. The term “tracing” in plane tabling refers to:
a) Making duplicate copies of the survey sketch
b) Drawing lines on the transparent sheet placed on the drawing
c) Estimating the area enclosed by a boundary
d) Calculating the volume of a prismoidal object
View Answer
Correct answer: b) Drawing lines on the transparent sheet placed on the drawing
Explanation: Tracing in plane tabling involves drawing lines on a transparent sheet placed on top of the drawing to enhance the clarity and legibility of the sketch.
165. The concept of “true meridian” in plane tabling refers to:
a) The magnetic north direction
b) The actual geographical north direction
c) The angular deviation of the magnetic needle
d) The angle between the magnetic and true north
View Answer
Correct answer: b) The actual geographical north direction
Explanation: True meridian in plane tabling represents the actual geographical north direction, which is different from the magnetic north due to magnetic declination.
166. The primary advantage of using a telescopic alidade in plane tabling is:
a) Improved accuracy in angle measurements
b) Ability to measure long distances
c) Quick setup and operation
d) Automatic data recording
View Answer
Correct answer: a) Improved accuracy in angle measurements
Explanation: Telescopic alidades provide better accuracy in measuring angles compared to non-telescopic alidades, allowing for more precise plotting on the plane table.
167. The concept of “refraction” in plane tabling refers to:
a) The bending of light rays in the atmosphere
b) The reflection of light from a shiny surface
c) The measurement of light intensity
d) The scattering of light by particles in the air
View Answer
Correct answer: a) The bending of light rays in the atmosphere
Explanation: Refraction in plane tabling refers to the bending of light rays as they pass through the atmosphere, which can cause errors in angle measurements.
168. The process of “balancing sights” in plane tabling involves:
a) Adjusting the leveling bubble
b) Aligning the instrument with the known reference point
c) Taking readings from both sides of the instrument station
d) Calculating the average of multiple measurements
View Answer
Correct answer: c) Taking readings from both sides of the instrument station
Explanation: Balancing sights in plane tabling involves taking readings from both sides of the instrument station to minimize errors caused by instrument setup or observation.
169. The term “subsidiary plane table” in plane tabling refers to:
a) A smaller version of the plane table used for detailed surveys
b) A specialized instrument for measuring slope angles
c) A support device used to stabilize the plane table
d) A tool for measuring horizontal distances
View Answer
Correct answer: a) A smaller version of the plane table used for detailed surveys
Explanation: A subsidiary plane table is a smaller version of the main plane table that is used for detailed surveys or when working in restricted areas.
170. The concept of “meridional parts” in plane tabling refers to:
a) The division of the survey area into smaller sections
b) The calculation of distances along the meridian lines
c) The measurement of magnetic declination
d) The plotting of features based on their angular position
View Answer
Correct answer: b) The calculation of distances along the meridian lines
Explanation: Meridional parts in plane tabling involve calculating distances along the meridian lines, which can be used to determine the length and direction of features on the survey sketch.
