WorksheetsDay 68-Dec 2-worksheet-Diploma-Theodolite survey part 1
Total questions: 20
Worksheet time: 13mins
Which part of a theodolite carries the 0–360° graduations and is connected to the outer spindle?
Upper plate
Lower plate
Index frame
A-frame
The altitude bubble is the most sensitive bubble and is mainly used for —
Centering
Vertical measurement
Horizontal alignment
Eliminating parallax
The vertical circle of a theodolite is graduated in four quadrants, each from —
0° to 60°
0° to 90°
−90° to +90°
0°–180°
Which feature helps in accurate centering even when the plumb bob oscillates due to wind?
Shifting head
Optical plummet
Altitude bubble
Tripod shoes
Turning the telescope about the horizontal axis through 180° is known as —
Swinging
Transiting
Centering
Changing face
In proper adjustment, which relationship must hold true?
Line of collimation ∥ vertical axis
Horizontal axis ⟂ vertical axis
Plate bubble axis ∥ vertical axis
Telescope axis ∥ plate axis
True/False: The index frame of a theodolite is shaped like the letter “A”.
True
False
True/False: The vertical axis of the theodolite is the axis about which the telescope rotates in the vertical plane.
True
False
Assertion–Reason: During focusing, parallax error is removed when there is no relative movement between image and crosshairs. Reason: Parallax is eliminated by properly focusing both the objective and eyepiece.
A and R true, R explains A
A and R true, R does not explain A
A true, R false
A false, R true
Fill in the blank: The upper plate of a theodolite is also known as the (a) plate.
Fill in the blank: Rotating the telescope in the horizontal plane about the vertical axis is called (a) .
Fill in the blank:The line joining the crosshair intersection and the optical center of the objective is called (a) .
Fill in the blank: Aligning the instrument exactly over the station point is called (a) .
Fill in the blank: The vertical circle is rigidly connected to the (a) .
Fill in the blank: The least count of a commonly used Vernier theodolite is (a) seconds.
Fill in the blank: The vertical axis and horizontal axis of a theodolite must always be ______ to each other.
perpendicular
parallel
coincident
skew
Fill in the blank: The A-shaped support that connects the telescope to the upper plate is called the ______.
A-frame
tribrach
plummet
index frame
Fill in the blank: The small bubble used to level the vertical circle is the ______ bubble.
altitude
plate
tube
circular
Fill in the blank: The plate carrying the Verniers for reading horizontal angles is called the ______ plate.
upper
lower
index
circle
Fill in the blank: The process of removing parallax by focusing the eyepiece is called ______ adjustment.
focusing
collimation
leveling
centering
