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Civil Engineering MCQS-Surveying Section 5
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1. 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.
2. Bergchrund is a topograhical feature in
plains
water bodies
hills
glaciated region
3. To orient a plane table at a point P roughly south of the mid-point of two inaccessible conical hill stations A and B in the plains, a point C is selected in line with AB and table is oriented at C by bringing ab in line with AB. A ray is then drawn towards P and at P the table is oriented by back ray method. The orientation so obtained, is
unique and correct
incorrect
manifold and correct
not reliable.
4. Which one of the following statements is correct ?
when the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity
the mean of the readings of the two verniers gives correct reading free from the eccentricity
one vernier may be used if the readings of two verniers differ by a constant
all the above.
5. Pick up the correct statement from the following
1 second of arc corresponds to a displacement ratio of 1:206, 300
1 degree of arc corresponds to a displacement ratio of 1:57
the angular errors tend to propagate themselves along a traverse as the square root of the number of stations
all the above.
6. The chaining on sloping ground is
easier along the falling gradient
easier along the up gradient
equally convenient along falling as well as up gradient
all the above.
7. Profile levelling is usually done for determining
contours of an area
capacity of a reservoir
elevations along a straight line
boundaries of property
8. For indirect ranging, number of ranging rods required, is
1
2
3
4
9. The operation of resection involves the following steps rough orientation of the plane table the three lines form a triangle of error drawing lines back through the three control points select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise the points obtained by three rays is the correct location. The correct sequence is
1, 3, 2, 4, 5
1, 2, 3, 4, 5
1, 4, 3, 2, 5
1, 4, 2, 3, 5
10. To avoid large centering error with very short legs, observations are generally made
to chain pins
by using optical system for centering the theodolite
to a target fixed on theodolite tripod on which theodolite may be fitted easily
all the above.
11. During secular variation of magnetic meridian at different places
range of oscillations is constant
period of oscillation is constant
range and period of oscillation both vary
period of oscillation only varies.
12. Designation of a curve is made by :
angle subtended by a chord of any length
angle subtended by an arc of specified length
radius of the curve
curvature of the curve.
13. If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by
taking short legs
making repeated observations of angular and linear measurements
making a subsidiary traverse to determine the length of a long leg
all the above.
14. Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to
shift
twice the shift
thrice the shift
four times the shift.
15. Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by
degree of the curve
square of the degree of the curve
inverse of the degree of the curve
none of these.
16. The line of collimation method of reduction of levels, does not provide a check on
intermediate sights
fore sights
back sights
reduced levels.
17. The method of reversal
is usually directed to examine whether a certain part is truly parallel or perpendicular to another
makes the erroneous relationship between parts evident
both (a) and (b)
neither (a) nor (b).
18. You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of
repetition
reiteration
double observations
exactness.
19. If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for
horizontal sights
inclined sights upward
inclined sight downward
none of these.
20. If the whole circle bearing of a line is 180°, its reduced bearing is
S 0° E
S 0° W
S
N.
21. The chord of a curve less than peg interval, is known as
small chord
sub-chord
normal chord
short chord.
22. Mistakes which may produce a very serious effect upon the final results arise due to
in attention
in experience
carelessness
all of these.
23. A well conditioned triangle has no angle less than
20°
30°
45°
60°.
24. Contour lines of different elevations can unite to form one line, only in the case of
a vertical cliff
a saddle
a water shed line
a hill top.
25. The line of sight is kept as high above ground surface as possible to minimise the error in the observed angles due to
shimmering
horizontal refraction
vertical refraction
both shimmering and horizontal refraction.
26. The smaller horizontal angle between the true meridian and a survey line, is known
declination
bearing
azimuth
dip.
27. The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as
traverse leg
a base
traverse base
all the above.
28. For locating a distant object visible from two transit stations, the method usually preferred to, is
Angles and distances from transit stations
Angles from two transit stations
distance from two transit stations
Angle from one transit station and distance from the other.
29. Number of subdivisions per metre length of a levelling staff is
100
200
500
1000
30. Pick up the correct statement from the following :
the diaphragm is placed between eyepiece and the objective but nearer to the former
the diaphragm is placed between the eyepiece and objective but nearer to the later
the outer component of the objective is a double-convex lens of crown glass
all the above.
31. Prolongation of chain line across an obstruction in chain surveying, is done by
making angular measurements
drawing perpendiculars with a chain
solution of triangles
all the above.
32. 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
33. Subtense tacheometry is generally preferred to if ground is
flat
undulating
mountaineous
deserts.
34. For high sensivity of the bubble tube
a liquid of low viscosity is used
a liquid of low surface tension is used
the bubble space should be long
all the above.
35. Short offsets are measured with
an ordinary chain
an invar tape
a metallic tape
a steel tape.
36. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known
levelling
centering
orientation
setting.
37. There are two stations A and B. Which of the following statements is correct :
. the fore bearing of AB is AB
the back bearing of AB is BA
the fore and back bearings of AB differ by 180°
all the above.
38. Chain surveying is well adopted for
small areas in open ground
small areas with crowded details
large areas with simple details
large areas with difficult details.
39. In a closed traverse, sum of south latitudes exceeds the sum of north latitudes and the sum of east departures exceeds the sum of west departures, then, the closing line will lie in
north-west quadrant
north east quadrant
south-east quadrant
south-west quadrant.
40. A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is
208.75 m
202.75 m
206.75 m
211.75 m
41. The Huygen's telescope eye piece
is aplanatic
achromatic
both (a) and (b)
neither (a) nor (b).
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