221. The process of “trunnion axis adjustment” in theodolite surveying is used to:
a) Level the instrument
b) Align the telescope with the vertical axis
c) Measure vertical angles
d) Measure horizontal angles
View Answer
Correct answer: a) Level the instrument
Explanation: Trunnion axis adjustment in theodolite surveying involves the process of leveling the instrument by adjusting the trunnion screws to ensure the horizontal axis is parallel to the ground.
222. Which of the following is NOT a type of theodolite reading?
a) Direct reading
b) Vernier reading
c) Tangential reading
d) Stadia reading
View Answer
Correct answer: c) Tangential reading
Explanation: Tangential reading is not a type of theodolite reading. The other options refer to different methods of reading and measuring angles using a theodolite.
223. The process of “orienting” the theodolite in surveying refers to:
a) Aligning the vertical axis of the instrument
b) Setting up the instrument on the tripod
c) Setting the instrument to zero readings
d) Aligning the instrument with a known reference point
View Answer
Correct answer: d) Aligning the instrument with a known reference point
Explanation: Orienting the theodolite involves aligning the instrument with a known reference point or direction to establish the initial reference for subsequent angle measurements.
224. Which of the following is a common type of theodolite used for precise engineering and construction surveys?
a) Vernier theodolite
b) Digital theodolite
c) Tacheometric theodolite
d) Mining theodolite
View Answer
Correct answer: b) Digital theodolite
Explanation: Digital theodolites are commonly used in precise engineering and construction surveys due to their ease of use, accuracy, and advanced features for data collection.
225. The process of “balancing” the theodolite in surveying refers to:
a) Aligning the horizontal axis of the instrument
b) Adjusting the leveling screws for stability
c) Aligning the instrument with the meridian
d) Setting the instrument to zero readings
View Answer
Correct answer: b) Adjusting the leveling screws for stability
Explanation: Balancing the theodolite involves adjusting the leveling screws to ensure the instrument is stable and level, allowing for accurate angle measurements.
226. The process of “intersection” in theodolite surveying is used to:
a) Determine the position of a point by sighting from two known points
b) Measure the vertical angle of a point
c) Calculate the slope distance between two points
d) Determine the elevation of a point using leveling techniques
View Answer
Correct answer: a) Determine the position of a point by sighting from two known points
Explanation: Intersection in theodolite surveying involves determining the position of a point by sighting from two known points and using triangulation techniques.
227. Which of the following statements is true about the principle of theodolite surveying?
a) The theodolite measures angles using a compass needle.
b) The theodolite measures distances using electromagnetic waves.
c) The theodolite measures angles using a horizontal and vertical circle.
d) The theodolite measures distances using stadia lines.
View Answer
Correct answer: c) The theodolite measures angles using a horizontal and vertical circle.
Explanation: The principle of theodolite surveying is based on measuring angles using a combination of horizontal and vertical circles, allowing for precise angular measurements.
228. Which of the following is a component of a theodolite used for sighting and measuring angles?
a) Compass
b) Telescope
c) Altimeter
d) Rangefinder
View Answer
Correct answer: b) Telescope
Explanation: The telescope is a primary component of a theodolite used for sighting and measuring angles, both horizontally and vertically.
229. The process of “reducing angles” in theodolite surveying is used to:
a) Determine the magnetic declination at the survey location
b) Convert observed angles to true angles
c) Determine the slope distance between two points
d) Calculate the difference in elevation between two points
View Answer
Correct answer: b) Convert observed angles to true angles
Explanation: Reducing angles in theodolite surveying involves correcting the observed angles for various factors such as atmospheric conditions, instrument errors, and local variations, to obtain accurate true angles.
230. Which of the following is a type of theodolite used for astronomical observations and geodetic surveys?
a) Vernier theodolite
b) Digital theodolite
c) Theodolite with micrometer reading
d) Transit theodolite
View Answer
Correct answer: c) Theodolite with micrometer reading
Explanation: Theodolites with micrometer reading are used for precise astronomical observations and geodetic surveys, where high accuracy in angle measurement is required.
