Online Civil Engineering Test - Surveying Test

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Total number of questions: 20.
Time allotted: 30 minutes.
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If θ is the slope of the ground and l is the measured distance, the correction is

2l sin² θ/2

2l cos² θ/2

2l tan² θ/2

2l cot² θ/2.

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Let angular value of one graduation of a tube of length x be φ seconds and R be the radius of its internal curved surface, then

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The 'fix' of a plane table from three known points, is good, if

middle station is nearest

middle station is farthest

either the right or left station is nearest

none of these.

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For orientation of a plane table with three points A, B and C, Bessel's drill is

Align b through a and draw a ray towards c, align a through b and draw a ray towards c, finally align c through the point of intersection of the previously drawn rays

Align c through a and draw a ray towards b, align a through c and draw a ray towards b, finally align b through the point of intersection of the previously drawn rays

Align c through b and draw a ray towards a, align b through c and draw a ray towards a, finally align a, through the point of intersection of the previously, drawn rays

In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step.

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If Δ is the angle of deflection of the curve, T₁ and T₂ are its points of tangencies, the angle between the tangent at T₁ and long chord T₁ T₂ will be

2 Δ.

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A clinometer is used for

measuring angle of slope

correcting line of collimation

setting out right angles

defining natural features.

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In an internal focusing telescope

the objective is at a fixed distance from the diaphragm

the focusing is done by the sliding of a divergent lens.

the focusing divergent lens is situated at about the middle of the tube

all the above.

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The Random errors tend to accumulate proportionally to

numbers of operations involved

reciprocal of operations involved

square root of the number of operation involved

cube root of the number of operation involved.

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Greater accuracy in linear measurements, is obtained by

tacheometry

direct chaining

direct taping

all the above.

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10.

The bearings of two traverse legs AB and BC are N52° 45' E and N34° 30' E respectively. The deflection angle is

18° 15' E

18° 15' N

18° 15' W

18° 15' R

18° 15' L

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11.

The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is

reciprocal levelling

precise levelling

differential levelling

flying levelling

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12.

The bearing of AB is 190° and that of CB is 260° 30'. The included angle ABC, is

80° 30'

99° 30'

70° 30'

none of these

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13.

Check lines (or proof lines) in Chain Surveying, are essentially required

to plot the chain lines

to plot the offsets

to indicate the accuracy of the survey work

to increase the out-turn

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14.

The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called

brightness of telescope

magnification of telescope

resolving power of telescope

none of these.

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15.

The Huygen's telescope eye piece

is aplanatic

achromatic

both (a) and (b)

neither (a) nor (b).

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16.

Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known

plane surveys

geodetic surveys

geographical surveys

topographical surveys.

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17.

Pick up the correct statement from the following :

it is difficult to eliminate an error completely at first trial

instability of the instrument makes it almost impossible to adjust it satisfactorily

adjustment screws must be left bearing firmly but should never be forced

all the above.

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18.

If D is the degree of the curve of radius R, the exact length of its specified chord, is

radius of the curve x sine of half the degree

diameter of the curve x sine of half the degree

diameter of the curve x cosine of half the degree

diameter of the curve x tangent of half the degree.

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19.

The 10 mm markings on a levelling staff placed at 20 m are separated by

radian

radian.

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20.

The additional lines which are measured to show the correctness of the chain surveying are called:

check clines

proof lines

tie lines

all of these.

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Online Civil Engineering Test - Surveying Test

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