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Civil Engineering MCQS-Surveying Section 4
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1. The reduced bearing of a line is N 87° W. Its whole circle bearing is
87°
273°
93°
3°
2. Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are known as
cadastral surveys
city surveys
topographical surveys
guide map surveys
3. Which of the following introduces an error of about 1 in 1000 if 20 m chain is used
length of chain 20 mm wrong
one end of the chain 0.9 m off the line
one end of chain 0.9 m higher than the other
all the above.
4. The total change in level along the line is equal to total back sights
minus total fore sights
the total rises minus total falls
the reduced level of last point minus reduced level of the first point
all the above.
5. ABCD is a rectangular plot of land. If the bearing of the side AB is 75°, the bearing of DC is
75°
225°
105°
285°
6. Grid lines are parallel to
magnetic meridian of the central point of the grid
line representing the central true meridian of the grid
geographical equator
none of these.
7. Total latitude of a point is positive if it lies
north of the reference parallel
south of the reference parallel
east of the reference parallel
west of the reference parallel.
8. In levelling operation,
The first sight on any change point is a back sight
The second sight on any change point is a fore sight
The line commences with a fore sight and closes with a back sight
The line commences with a back sight and closes with a foresight.
9. The apparent error on reversal is
equal to the actual error
twice the actual error
thrice the actual error
none of these.
10. Magnetic declination at any place
remains constant
does not remain constant
fluctuates
changes abruptly.
11. Systematic errors are those errors
which cannot be recognised
whose character is understood
whose effects are cumulative and can be eliminated
none of these.
12. An angle of deflection right, may be directly obtained by setting the instrument to read
zero on back station
180° on back station
90°
270° on back station.
13. 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
14. Transition curves are introduced at either end of a circular curve, to obtain
gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the transition curve with main curve
gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
gradual change of gradient from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
none of these.
15. he horizontal angle between true meridian and magnetic meridian, is known
bearing
magnetic declination
dip
convergence.
16. Magnetic bearing of a survey line at any place
remains constant
changes systematically
varies differently in different months of the year
is always greater than true bearing.
17. Perpendicularity of an offset may be judged by eye, if the length of the offset is
5 m
10 m
15 m
20 m
18. 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' L
19. A lemniscate curve will not be transitional throughout, if its deflection angle, is
45°
90°
120°
180°
20. In a lemniscate curve the ratio of the angle between the tangent at the end of the polar ray and the straight, and the angle between the polar ray and the straight, is
2
3
4
(3/2
21. Ranging in chain survey means
looking at an isolated point not on the line
establishing an intermediate point on the line
determining the distance between end points
determining the offset distance
22. Accurate measurement of deflection angles with a transit not properly adjusted may be made by
setting the vernier A at zero at back station and then plunging the telescope
setting the vernier A at zero at back station and turning the instrument to the forward station
taking two back sights one with the telescope normal and the other with telescope inverted
none of these.
23. If whole circle bearing of a line is 120°, its reduced bearing is
S 20° E
S 60° E
N 120° E
N 60° E.
24. Greater accuracy in linear measurements, is obtained by
tacheometry
direct chaining
direct taping
all the above.
25. From any point on the surface with a given inclination
only one contour gradient is possible
two contour gradients are possible
indefinite contour gradients are possible
all the above.
26. Angles to a given pivot station observed from a number of traverse stations when plotted, the lines to the pivot station intersect at a common point
angular measurements are correct and not the linear measurements
linear measurements are correct and not the angular measurements
angular and linear measurements are correct and not the plotting of traverse
angular and linear measurements and also plotting of the traverse are correct.
27. Reduced bearing of a line is an angle between
north line and given line measured clockwise
. north line and given line measured anticlockwise
east or west and the given line
given line and the part of the meridian whether N end or S end, lying adjacent to it.
28. While measuring with a metallic tape of 30 m length pull should be applied
1 kg
2 kg
3 kg
4 kg
29. The co-ordinate of a point measured perpendicular to the parallel, is called
total latitude
meridian distance
total departure
consecutive co-ordinate.
30. The magnetic meridian at any point, is the direction indicated by a freely suspended
magnetic needle
and properly balanced magnetic needle
properly balanced and uninfluenced by local attractive force
magnetic needle over an iron pivot.
31. If the radius of a simple curve is 600 m, the maximum length of the chord for calculating offsets, is taken
10 m
15 m
20 m
30 m
32. For preparation of a contour plan for a route survey
method of squares is used
method of trace contour is used
method of cross profile is used
indirect method of contouring is used.
33. Flint glass
has slightly the greater refracting power than crown glass
has roughly double refracting power than that of crown
and crown glass proportions yield the required focal length and neutralise the dispersion produced by the convex lens at the emergence from the concave
all the above.
34. The zero of the graduated circle of a prismatic compass is located at
north end
east end
south end
west end.
35. A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 106 kg/cm2, the correction to be applied is
0.000909 m
+ 0.0909 m
0.000909 m
none of these
36. 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
37. The power of a lens
is reciprocal of its focal length
is positive if it is a convex lens
is negative if it is a concave lens
is measured in diopter.
38. In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to
line of sight
line of collimation
axis of the telescope
None of these
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