# Imp questions on surveying for civil engineering aspirants part 02

1) In quadrant bearing system, back bearing of a line may be obtained from its forward bearing, by

A. adding 180°, if the given bearing is less than 180°

B. subtracting 180°, if the given bearing, is more than 180°

C. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa

D. none of these.

2) Pick up the correct statement from the following:

A. the theodolite in which telescope can be rotated in vertical plane is called a transit

B. when the vertical circle is to the left of the telescope during observation, it is called to be in left face

C. when the vertical circle is to the right of the telescope during observation, it is called to be in right face

D. all the above.

3) Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following

A. chain surveying

B. compass surveying

C. plan table surveying

D. thermometric surveying.

4) While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the leveling staff and the cross hairs. The instrument is

A. correctly focused

B. not correctly focused

C. said to have parallax

D. free from parallax.

5) Pick up the correct statement from the following :

A. the apparent error on reversal is twice the actual error

B. the correction may be made equal to half the observed discrepancy.

C. the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results

D. all the above.

6) True meridians are generally preferred to magnetic meridians because

A. these converge to a point

B. these change due to change in time

C. these remain constant.

D. None of these.

7) A bearing of a line is also known as

A. magnetic bearing

B. true bearing

C. azimuth

D. reduced bearing

8) Accuracy of 'fix' by two point problem, is

B. good

C. not reliable

D. unique.

9) The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is

A. 102°

B. 78°

C. 45°

D. none of these.

10) Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to

A. 14.14

B. 28.28 m

C. 200 m

D. none of these.

11) The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to

A. the distance between the zero of gradient and the foot of the staff

B. twice the distance between the zero of graduation and the foot of the staff

C. thrice the distance between the zero of graduation and the foot of the staff

D. none of the above.

12) The most reliable method of plotting a theodolite traverse, is

A. by consecutive co-ordinates of each station

B. by independent co-ordinates of each station

C. by plotting included angles and scaling off each traverse leg

D. by the tangent method of plotting.

13) If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

A. R/10

B. R/15

C. R/20

D. R/25.

14) For the construction of highway (or railway)

A. longitudinal sections are required

B. cross sections are required

C. both longitudinal and cross sections are required

D. none of these.

15) The main principle of surveying is to work

A. from part to the whole

B. from whole to the part

C. from higher level to the lower level

D. from lower level to higher level.

16) The slope correction for a length of 30 m along a gradient of 1 in 20, is

A. 3.75 cm

B. 0.375 cm

C. 37.5 cm

D. 2.75 cm.

17) For a closed traverse the omitted measurements may be calculated

A. length of one side only

B. bearing of one side only

C. both length and bearing of one side

D. length or bearing of adjacent side

E. all the above.