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Civil Engineering MCQS-Surveying Section 8
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Civil Engineering MCQS-Surveying Section 8
1
A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads
A
The directions of plumb lines suspended at different points in a survey are not strictly parallel
B
In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal
C
In surveys of large extent, the effect of curvature of the earth must be considered
D
All the above.
2
In geodetic surveys higher accuracy is achieved, if
A
curvature of the earth surface is ignored
B
curvature of the earth surface is taken into account
C
angles between the curved lines are treated as plane angles
D
none of these.
3
In geodetic surveys higher accuracy is achieved, if
A
curvature of the earth surface is ignored
B
curvature of the earth surface is taken into account
C
angles between the curved lines are treated as plane angles
D
none of these.
4
Determining the difference in elevation between two points on the surface of the earth, is known as
A
levelling
B
simple levelling
C
differential levelling
D
longitudinal levelling.
5
Contours of different elevations may cross each other only in the case of
A
an over hanging cliff
B
a vertical cliff
C
a saddle
D
an inclined plane.
6
Permanent adjustments of a level are
A
2 in number
B
3 in number
C
4 in number
D
6 in number
7
The radius of a simple circular curve is 300 m and length of its specified chord is 30 m. The degree of the curve is
A
5.73°
B
5.37°
C
3.57°
D
3.75°.
8
During levelling if back sight is more than foresight
A
The forward staff is at lower point
B
The back staff is at lower point
C
The difference in level, cannot be ascertained.
D
none of these.
9
Two contour lines, having the same elevation
A
cannot cross each other
B
can cross each other
C
cannot unite together
D
can unite together.
10
The surface of zero elevation around the earth, which is slightly irregular and curved, is known as
A
mean sea level
B
geoid surface
C
level surface
D
horizontal surface.
11
The representation of general topography of a very flat terrain is possible only
A
by drawing contours at large interval
B
by drawing contours at small interval
C
by giving spot levels at large interval
D
by giving spot levels to salient features at close interval.
12
The bearing of line AB is 152° 30' and angle ABC measured clockwise is 124° 28'. The bearing of BC is
A
27° 52'
B
96° 58'
C
148° 08'
D
186° 58'
13
A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads
A
azimuth of the forward line
B
bearing of the. forward line
C
back bearing of the forward line
D
equal to 360°-azimuth of the forward line.
14
Correction per chain length of 100 links along a slope of α radians, is
A
100 α2
B
100 α
C
100 α3
D
100 α-1.
15
While working on a plane table, the correct rule is :
A
Draw continuous lines from all instrument stations
B
Draw short rays sufficient to contain the points sought
C
Intersection should be obtained by actually drawing second rays
D
Take maximum number of sights as possible from each station to distant objects.
16
Pick up the correct statement from the following
A
the contour lines having the same elevation cannot unite and continue as one line
B
a contour can not end abruptly, but must ultimately close itself not necessarily within the limits of map.
C
the direction of steepest slope at a point on a contour is at right angles to the contour
D
all the above.
17
In case of a double line river, contours are
A
stopped at the banks of the river
B
stopped at the edge of the river
C
drawn across the water
D
drawn by parabolic curves having their vertex at the centre of the water.
18
In case of a direct vernier scale
A
graduations increase in opposite direction in which graduations of the main scale increase
B
smallest division is longer than smallest division of the main scale
C
graduations increase in the same direction in which graduations of the main scale increase
D
none of these.
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