Lecture 26: Theodolite Traversing
50 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main purpose of a theodolite?

  • Measuring distances accurately
  • Measuring angles in horizontal and vertical planes (correct)
  • Measuring time accurately
  • Measuring elevations of mountains

    • What is the maximum range of accurate measurement a theodolite can achieve?

  • 10 arc seconds
  • 30 degrees
  • 20 arc seconds (correct)
  • 60 degrees

    • Which type of theodolite is mounted within one of the standards with a full 360° scale?

  • Transit theodolite (correct)
  • Non-transit theodolite
  • Vernier Theodolite
  • None of the above

    • What is the function of the vertical circle in a theodolite?

    <p>Measure vertical angle</p> Signup and view all the answers

    What is the purpose of eliminating parallax in a theodolite's telescope?

    <p>To reduce errors in angle measurements</p> Signup and view all the answers

    Apart from measuring deflection angles, what other use does a theodolite have?

    <p>Finding magnetic north direction</p> Signup and view all the answers

    What is used to hold the telescope at a particular vertical angle?

    <p>Vertical tangent screw</p> Signup and view all the answers

    Which component must be leveled before using the instrument?

    <p>Upper plate</p> Signup and view all the answers

    What is used to center the instrument exactly over a station mark?

    <p>Plumb bob</p> Signup and view all the answers

    Which part of the instrument houses the foot screws and the bearing for the vertical axis?

    <p>Lower plate</p> Signup and view all the answers

    What is used for levelling particularly when taking vertical angle observations?

    <p>Altitude level</p> Signup and view all the answers

    Which component is used to define the horizontal direction in which the telescope is sighted?

    <p>Index bar</p> Signup and view all the answers

    What is used during a sequence or 'round' of horizontal angle measurements?

    <p>Upper horizontal clamp</p> Signup and view all the answers

    What is used to gradually rotate the horizontal circle when it is clamped?

    <p>Lower horizontal tangent screw</p> Signup and view all the answers

    What is placed on the upper plate and known as the plate bubble?

    <p>T-frame</p> Signup and view all the answers

    What carries two Vernier at its extremities and forms part of T-frame?

    <p>Index bar</p> Signup and view all the answers

    What is the purpose of transiting in theodolite usage?

    <p>Change the face of the instrument</p> Signup and view all the answers

    What does 'face left' refer to in the context of theodolite operation?

    <p>Vertical circle on the left of the observer</p> Signup and view all the answers

    What is the axis of the telescope in theodolite terminology?

    <p>Imaginary line through optical center of object glass and eyepiece</p> Signup and view all the answers

    What is meant by 'changing face' in the context of theodolite operation?

    <p>Bringing the vertical circle from one side to the other</p> Signup and view all the answers

    What is 'centering' in theodolite usage?

    <p>Setting the instrument exactly over a marked station</p> Signup and view all the answers

    What does 'face right' signify when using a theodolite?

    <p>Vertical circle on the right of the observer</p> Signup and view all the answers

    In theodolite operation, what is temporary adjustment primarily focused on?

    <p>Centering, leveling, and focusing</p> Signup and view all the answers

    What is 'swinging the telescope' related to in a theodolite?

    <p>Turning telescope in a horizontal plane</p> Signup and view all the answers

    In a theodolite, what action results from 'line of collimation'?

    <p>Imaginary line passing through optical center of objective glass and its continuation.</p> Signup and view all the answers

    What does 'vertical axis' represent in a theodolite equipment?

    <p>Axis of rotation in vertical plane.</p> Signup and view all the answers

    What is recorded in column 4 of Gale's Traverse Table?

    <p>Angles</p> Signup and view all the answers

    What condition needs to be satisfied by the sum of all interior angles during traverse adjustments?

    <p>Equal to (2n - 4) right angles</p> Signup and view all the answers

    What should be done if the sum of all exterior angles during the traverse does not meet the geometric conditions?

    <p>Adjust the discrepancy</p> Signup and view all the answers

    How are corrections applied during traverse adjustments?

    <p>By applying corrections to angles</p> Signup and view all the answers

    What calculation is made to find the closing error in a traverse?

    <p>Summing up latitudes and departures</p> Signup and view all the answers

    What rule can be applied to calculate corrections during traverse adjustments?

    <p>Bowditch's rule</p> Signup and view all the answers

    How are corrections distributed to all sides of a traverse in graphical balancing?

    <p>Proportional to their length</p> Signup and view all the answers

    What does a horizontal line drawn from Po to P' represent in graphical balancing?

    <p>'P' station correction point</p> Signup and view all the answers

    'Qo Qa, Ro Ra, So Sa, and To Ta' represent what in graphical balancing corrections?

    <p>'Qo, Ro, So, and To' station correction points</p> Signup and view all the answers

    'Pa Qa Ra Sa Ta' provide what in graphical balancing of a traverse?

    <p>'Qa, Ra, Sa, and Ta' station coordinates after correction</p> Signup and view all the answers

    In the method of reiteration, what is done to ensure the sum of the measured angles is 360º?

    <p>Unlocking upper clamp and bisecting signals</p> Signup and view all the answers

    What is the main purpose of a traverse in surveying?

    <p>Measuring horizontal control</p> Signup and view all the answers

    How are vertical angles measured in surveying?

    <p>By leveling the telescope</p> Signup and view all the answers

    What is the purpose of the levelling process described for a theodolite?

    <p>To ensure accurate horizontal sight</p> Signup and view all the answers

    Which method is used to measure a horizontal angle to a finer degree of accuracy?

    <p>Method of repetition</p> Signup and view all the answers

    What does sighting a signal at P with zero reading on Vernier A indicate in surveying?

    <p>The start of a reiteration method</p> Signup and view all the answers

    What is the formula to calculate the sum of interior angles for a traverse?

    <p>(2n-4) x 900</p> Signup and view all the answers

    What operation is performed to adjust the closing error in a closed traverse?

    <p>Balancing</p> Signup and view all the answers

    Which method is used for balancing a traverse when angular measurements are more precise than linear measurements?

    <p>Transit rule</p> Signup and view all the answers

    What is the condition that must be satisfied in a closed traverse regarding departures and latitudes?

    <p>$\Sigma D = 0$, $\Sigma L = 0$</p> Signup and view all the answers

    Which component of a line represents the north-south direction?

    <p>Latitude</p> Signup and view all the answers

    What does the term 'closing error' refer to in a closed traverse?

    <p>Distance between two computed positions</p> Signup and view all the answers

    In which direction is the total error in departure and latitude distributed in Bowditch's method?

    <p>Proportionate to line length</p> Signup and view all the answers

    What value must $ ext{Σ DT}$ and $ ext{Σ LT}$ satisfy for the transit rule method of balancing a traverse?

    <p>$0$</p> Signup and view all the answers

    More Like This

    Theodolite Surveying Quiz
    3 questions

    Theodolite Surveying Quiz

    CalmingSunstone avatar
    CalmingSunstone
    Theodolite Traversing Lecture 26
    52 questions

    Theodolite Traversing Lecture 26

    SprightlyVision avatar
    SprightlyVision
    Lecture 26: Theodolite Traversing
    83 questions

    Lecture 26: Theodolite Traversing

    SprightlyVision avatar
    SprightlyVision
    Engineering Surveying Chapter 5
    38 questions

    Engineering Surveying Chapter 5

    ArtisticMolybdenum avatar
    ArtisticMolybdenum
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser