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Civil Engineering MCQS-Surveying Section 3
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1. The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known
a simple curve
a compound curve
a reverse curve
a vertical curve.
2. The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescope's
resolving power
brightness
field of view
magnification.
3. The bubble tube is nearly filled with
alcohol or chloroform
a liquid which is very mobile
a liquid having low freezing point
a liquid having low freezing point
4. Simpson's rule for calculating areas states that the area enclosed by a curvilinear figure divided into an even number of strips of equal width, is equal to
half the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets, and thrice the sum of the even offsets
one third the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets
one third the width of a strip, multiplied by the sum of two extreme offsets, four times the sum of the remaining odd offsets, and twice the sum of the even offsets
one sixth the width of a strip, multiplied by the sum of the two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets
5. In a constant level tube, size of the bubble remains constant because upper wall is
of relatively larger radius
of relatively smaller radius
fiat
convex downwards.
6. Prismatic compass is considered more accurate than a surveyor's compass, because
it is provided with a better magnetic needle
it is provided with a sliding glass in the object vane
its graduations are in whole circle bearings
it is provided with a prism to facilitate reading of its graduated circle
7. In reciprocal levelling, the error which is not completely eliminated, is due to
earth's curvature
non-adjustment of line of collimation
refraction
non-adjustment of the bubble tube.
8. In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to
ease of reduction of observations
facility of holding
minimum effect of careless holding on the result
none of these
9. Removal of parallax, may be achieved by focussing
the objective
the eye-piece
the objective and the eye-piece
none of these
10. Pick up the correct statement from the following :
A level surface is perpendicular at all points to the direction of gravity
A level line lies in level surface
A horizontal surface is normal to the direction of gravity at only one point
All the above.
11. The direction of steepest slope on a contour, is
along the contour
at an angle of 45° to the contour
at right angles to the contour
none of these
12. Back bearing of a line is equal to
Fore bearing ± 90°
Fore bearing ± 180°
Fore bearing ± 360°
Fore bearing ± 270°
13. 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.
14. The longitudinal section of the surface of bubble tube is
straight
circular
parabolic
elliptic.
15. Imaginary line passing through points having equal magnetic declination is termed as
isogon
agonic line
isoclinic line
none of these
16. A theodolite is said to be in perfect adjustment if
rotation axis is vertical to the transit axis
transit axis is perpendicular to line of collimation
line of collimation sweeps out a vertical plane while the telescope is elevated or depressed
all the above
17. While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates
the rotation axis is vertical
the trummion axis is horizontal
the line of collimation is perpendicular to vertical axis
none of the above
18. The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto
5"
10"
15"
20"
19. Pick up the correct statement from the following :
the lines of sight while observing back sight and fore sight lie in the same horizontal plane
the staff readings are measurements made vertically downwards from a horizontal plane
the horizontal plane with reference to which staff readings are taken, coincides with the level surface through the telescope axis
all the above.
20. A traverse deflection angle is
less than 90°
more than 90° but less than 180°
the difference between the included angle and 180°
the difference between 360° and the included angle.
21. While measuring a chain line between two stations A and B intervened by a raised ground
vision gets obstructed
chaining gets obstructed
both vision and chaining get obstructed
all the above.
22. he 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.
23. The true meridian of a place is the line in which earth's surface is intersected by a plane through
east and west points
zenith and nadir points
north and south geographical poles
north and south magnetic poles.
24. The least count of a vernier scale is
sum of the smallest divisions of main and vernier scales
value of one division of the primary scale divided by total number of divisions of vernier scale
value of one division of vernier scale divided by total number of divisions of primary scale
none of these.
25. Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling
radiation
intersection
traversing
resection.
26. A clinometer is used for
measuring angle of slope
correcting line of collimation
setting out right angles
defining natural features.
27. Diurnal variation of magnetic declination is
greater at equator than nearer the poles
less at equator than nearer the poles
less in summer than in winter
same at all latitudes and during different months.
28. 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.
29. The construction of optical square is based, on the principle of optical
reflection
refraction
double refraction
double reflection.
30. If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as
direct vernier
double vernier
retrograde vernier
simple vernier.
31. Cross-staff is used for
setting out right angles
measuring contour gradient
taking levels
measuring distances
32. The 'point of curve' of a simple circular curve, is
point of tangency
point of commencement
point of intersection
mid-point of the curve
33. 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.
34. The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is
5 mm
10 mm
15 mm
20 mm
35. Pick up the correct statement from the following :
in the earth's magnetic field, a magnetic needle rests in magnetic meridian
the angle between the true meridian and the magnetic meridian is called magnetic variation
one end of the magnetic needle supported at its centre of gravity tends to dip down towards the. nearer magnetic pole of the earth
all the above.
36. Ramsden eye-piece consists of
two convex lenses short distance apart
two concave lenses short distance apart
one convex lens and one concave lens short distance apart
two plano-convex lenses short distance apart, with the convex surfaces facing each other.
37. The distance between steps for measuring down hill to obtain better accuracy
decreases with decrease of slope
increases with increase of slope
decreases with increase of slope
decreases with decrease of weight of the chain.
38. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at
every point of the bubble
either end of the bubble
the mid-point of the bubble
no where.
39. Pick up the correct statement from the following :
If the slope of the curve of a mass diagram in the direction of increasing abscissa is downward, it indicates an embankment
The vertical distance between a maximum ordinate and the next forward maximum ordinate represents the whole volume of the embankment
The vertical distance between a minimum ordinate and the next forward maximum ordinate represents the whole volume of a cutting
all the above.
40. The slope correction may be ignored if
the slope of the ground is less than 3°
to slope of the ground is say 1 in 19
both (a) and (b)
neither (a) nor (b)
41. If a tacheometer is fitted with an anal-latic lens
additive constant is 100, multiplying constant is zero
multiplying constant is 100, additive constant is zero
both multiplying and additive constants are 100
both multiplying and additive constants are 50.
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