| The vertical circle of a theodolite is generally graduated in |
A) the quadrantal system from 0 to 90° in the four quadrants
B) the Whole Circle Bearing System from 0 to 360°
C) the semi circle system from 0 to 180° in the left and right halves
D) a similar way to that in a prismatic compass
| The index frame of a Theodolite is |
A) A-frame attached to the telescope
B) the vernier circle of the horizontal circle
C) the T-shaped frame carrying the vernier of the vertical circle
D) the base of the theodolite having the levelling head
| By using an anallactic lens in a theodolite, |
A) the multiplying constant is made 100
B) the additive constant is made 0
C) we get a clearer image of the staf
D) the cross wires are seen more clearly
| In the method of repetition for measuring horizontal angles, to rotate the instrument without changing the reading |
A) lower clamp screw is tightened and upper clamp is loosened
B) lower clamp is loosened and the upper clamp screw is tightened
C) any one of the clamp screws is loosened
D) both the clamp screws are loosened
| Optical plummet is used |
A) in optic theodolite for compensating any tilt in the axis
B) in electronic theodolite for compensating any tilt in the axis
C) for accurate centering of the theodolite over a station
D) for accurate levelling of the theodolite
| Which of the following statement(s) is/are true for the ‘Method of Reiteration’ for measuring the horizontal angles? i. This method is useful when more number of angles are to be measured at one point ii. The horizontal angle is measured a number of times and the average value is taken |
A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) Neither (i) nor (ii)
| The sensitiveness of a bubble tube in a theodolite would decrease if |
A) the viscosity of the liquid is increased
B) the radius of curvature of the internal surface of the tube is increased
C) the diameter of the tube is increased
D) the length of the vapour bubble is increased
| Theodolite is an instrument which can be used for measuring (i) horizontal angle (ii) vertical angle (iii) horizontal distance |
A) Only (i)
B) (i) and (ii)
C) (ii) and (iii)
D) (i), (ii) and (iii)
| In theodolite, the plate bubble in the plate level will move considerably from its central position if the tripod leg is moved |
A) radially inwards
B) radially outwards
C) in the same direction of the bubble moved
D) in the opposite direction of the bubble moved
| The process of turning the telescope about the vertical axis in a horizontal plan is called as |
A) transiting
B) swinging
C) setting
D) centering
