questions of theodolite

7/25/2019 Questions of Theodolite

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QUESTIONS OF THEODOLITE

1. Theodolite is a instrument used for

tightening the capstan-headed nuts of level tube

measurement of horizontal angles only

measurement of vertical angles only

measurement of both horizontal and vertical angles

2 A'level line'is a

horizontal line

line parallel to the mean spheriodal surface of earth

line passing through the center of cross hairs and the center of eye piece

line passing through the objective lens and the eye-piece of a dumpy or tilting

level

3. Size of a theodolite is specified by

the length of telescope

the diameter of vertical circle

the diameter of lower plate

the diameter of upper plate

4. Which of the following is not the function of levelling head ?

to support the main part of the instrument

to attach the theodolite to the tripod

to provide a means for leveling the theodolite

none of the above

5. The temporary adjustments of a prismatic compass are i) Centering ii)



Levelling iii) Focusing the prism The correct order is

(0, (iii), 00

(0, (ii), (iii)

(ii), (iii), 0)

(in), (i), (ii

6 .In an internal focussing type of telescope, the lens provided is

concave

convex

plano-convex

plano-concave

7. If the R.L. of a B.M. is 100.00 m, the backsight is 1.215 m and the foresight is

1.870 m, the R.L. of the forward station is

99.345 m

100.345 m

100.655m

101.870m

8. Which of the following errors is not eliminated by the method of repetition

of horizontal angle measurement ?

error due to eccentricity of verniers

error due to displacement of station signals

error due to wrong adjustment of line of collimation and trunnion axis

error due to inaccurate graduation



9. Which of the following errors can be eliminated by taking mean of bot

face observations ?

error due to imperfect graduations

error due to eccentricity of verniers

error due to imperfect adjustment of plate levels

error due to line of collimation not being perpendicular to horizontal axis

10. If the lower clamp screw is tightened and upper clamp screw is

loosened, the theodolite may be rotated

on its outer spindle with a relative motion between the vernier and

graduated scale of lower plate

on its outer spindle without a relative motion between the vernier and gra-

duated scale of lower plate

on its inner spindle with a relative motion between the vernier and the


on its inner spindle without a relative motion between the vernier and the


11 .The adjustment of horizontal cross hair is required particularly when

the instrument is used for

leveling

prolonging a straight line

measurement of horizontal angles

all of the above

12. The process of turning the telescope about the vertical axis in

horizontal plane is known as

transiting



reversing

plunging

swinging

12. The error due to eccentricity of inner and outer axes can be

eliminated by

reading both verniers and taking the mean of the two

taking both face observations and taking the mean of the two

double sighting

taking mean of several readings distributed over different portions of the

graduated circle

13. The cross hairs in the surveying telescope are placed

midway between eye piece and objec�tive lens

much closer to the eye-piece than to the objective lens

much closer to the objective lens than to the eye piece

anywhere between eye-piece and objective lens

14. The following sights are taken on a turning point

foresight only

backsight only

foresight and backsight

foresight and intermediate sight

16.For which of the following permanent adjustments of theodolite, the

spire test is used ?

adjustment of plate levels



adjustment of line of sight

adjustment of horizontal axis

adjustment of altitude bubble and vertical index frame

17. Which of the following errors can be neutralised by setting the level

midway between the two stations ?

error due to curvature only

error due to refraction only

error due to both curvature and re-fraction

none of the above

18.All transits are theodolites but all theodolites are not transits.

1. TRUE

2. FALSE

questions of theodolite

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