201. What is a theodolite?
a) An instrument used for measuring distances
b) An instrument used for measuring angles
c) An instrument used for measuring heights
d) An instrument used for measuring volumes
View Answer
Correct answer: b) An instrument used for measuring angles
Explanation: A theodolite is a precise instrument used in surveying for measuring angles in both horizontal and vertical planes.
202. Which part of the theodolite is used to measure horizontal angles?
a) Vernier scale
b) Telescope
c) Vertical circle
d) Horizontal circle
View Answer
Correct answer: d) Horizontal circle
Explanation: The horizontal circle on a theodolite is used to measure horizontal angles by rotating it and reading the corresponding graduations.
203. Which part of the theodolite is used to measure vertical angles?
a) Vernier scale
b) Telescope
c) Vertical circle
d) Horizontal circle
View Answer
Correct answer: b) Telescope
Explanation: The telescope of a theodolite is used to measure vertical angles by sighting an object and reading the corresponding graduations on the vertical circle.
204. The accuracy of a theodolite is expressed in:
a) Feet
b) Meters
c) Seconds of arc
d) Degrees
View Answer
Correct answer: c) Seconds of arc
Explanation: The accuracy of a theodolite is typically expressed in seconds of arc, which represents a finer level of angular measurement.
205. What is the purpose of the leveling screws on a theodolite?
a) To adjust the horizontal axis
b) To adjust the vertical axis
c) To level the instrument
d) To calibrate the telescope
View Answer
Correct answer: c) To level the instrument
Explanation: The leveling screws on a theodolite are used to level the instrument so that accurate angle measurements can be made.
206. Which of the following is a disadvantage of using a digital theodolite?
a) Limited accuracy
b) Limited portability
c) Limited functionality
d) Limited battery life
View Answer
Correct answer: d) Limited battery life
Explanation: A disadvantage of using a digital theodolite is that it relies on batteries for operation, which may require frequent replacement or recharging.
207. The process of “resection” in theodolite surveying is used to:
a) Determine the magnetic declination at the survey location
b) Determine the elevation of a point on the survey sketch
c) Measure the horizontal distance between two points
d) Determine the location of the instrument station on the sketch
View Answer
Correct answer: d) Determine the location of the instrument station on the sketch
Explanation: Resection in theodolite surveying involves the process of determining the location of the instrument station on the survey sketch by sighting known reference points from the station.
208. Which of the following is a common source of error in theodolite measurements?
a) Magnetic declination
b) Refraction of light
c) Instrument calibration
d) Instrument leveling
View Answer
Correct answer: b) Refraction of light
Explanation: Refraction of light can introduce errors in theodolite measurements, as it causes the apparent position of objects to deviate from their true positions.
209. Theodolite traverse is commonly used for:
a) Measuring distances between two points
b) Establishing a network of control points
c) Determining elevations of survey points
d) Conducting topographic surveys
View Answer
Correct answer: b) Establishing a network of control points
Explanation: Theodolite traverse is commonly used in surveying to establish a network of control points by measuring angles and distances between traverse stations.
210. Which of the following is NOT a type of theodolite?
a) Transit theodolite
b) Digital theodolite
c) GPS theodolite
d) Vernier theodolite
View Answer
Correct answer: c) GPS theodolite
Explanation: GPS (Global Positioning System) theodolite is not a type of theodolite. It combines GPS technology with a theodolite to provide accurate positioning information.
