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Civil Engineering MCQS-Surveying Section 7
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1. Tilt of the staff in stadia tacheometry increases the intercept if it is
away from the telescope pointing down hill
towards the telescope pointing up-hill
away from the telescope pointing up-hill
none of these.
2. To orient a plane table at a point with two inaccessible points, the method generally adopted, is
intersection
resection
radiation
two point problem.
3. Number of links per metre length of a chain are
2
5
8
10
4. The method generally preferred to for contouring an undulating area, is
chain surveying
plane table surveying
tacheometrical surveying
compass surveying.
5. If the declination of the needle is 10° W
each of the whole circle reckoning has to be micros by 10°
in the quadrantal method, the correction is positive in the 1st and 3rd quadrants
in the quadrantal method, the corrections is negative in 2nd and 4th quadrants
all the above.
6. A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is
0.015 m
0.030 m
0.045 m
0.060 m
7. For taking offsets with an optical square on the right hand side of the chain line, it is held
by right hand upside down
by left hand upright
by right hand upright
by left hand up side down.
8. If the whole circle bearing of a line is 270°, its reduced bearing is
N 90° W
S 90° W
W 90°
90° W.
9. A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic
spherical aberration
chromatic aberration
coma
astigmatism.
10. While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1 cm = 2 cm, the displacement of the end of the ray in plan from the true position will be
0.02 cm
0.15 cm
02 cm
0.1 cm
11. Straight, parallel and widely spaced contours represent
a steep surface
a flat surface
an inclined plane surface
curved surface.
12. The theodolites used for making tacheometric observations by optical wedge system, are
provided with stadia hairs in front of eye piece
not provided with stadia hairs at all
fitted with a glass wedge inside the telescope
fitted with a glass wedge in front of telescope.
13. Resolving power of a telescope depends on
the diameter of the aperture
the pupil aperture of the eye
the diameter of the object glass
all the above.
14. Pick up the correct statement from the following :
with both handles in his left hand, the chain man throws out the chain with his right hand and the second chain man assists him to free it from knots
the follower of the chaining operation should be more experienced than the leader
at the end of the tenth chain length, the two chain men meet and the ten arrows are handed over to the leader
all the above.
15. Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is
104.0 m
104.5 m
105.0 m
105.5 m
16. The constant vertical distance between two adjacent contours, is called
horizontal interval
horizontal equivalent
vertical equivalent
contour interval
17. The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is
3.290 m
3.300 m
3.275 m
2.790 m
18. The correction to be applied to each 30 metre chain length along θ° slope, is
30 (sec θ - 1) m
30 (sin θ - 1) m
30 (cos θ - 1) m
30 (tan θ - 1) m
19. Under ordinary conditions, the precision of a theodolite traverse is affected by
systematic angular errors
accidental linear errors
systematic linear errors
accidental angular errors.
20. Pick up the incorrect statement from the following :
while measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length
an increase in temperature causes a tape to increase in length and the measured distance is too large
the straight distance between end points of a suspended tape is reduced by an amount called the sag correction
a 100 m tape of cross section 10 mm x 0.25 mm stretches about 10 mm under 5 kg pull.
21. Stadia techeometry was discovered by James Watt in the year.
1670
1770
1870
1900
22. The bearing of lines OA and OB are 16° 10' and 332° 18', the value of the included angle BOA is
316° 10'
158° 28'
348° 08'
43° 52'
23. The properties of autogenous curve for automobiles are given by
true spiral
cubic parabola
Bernoulli's Lemniscate
clothoid spiral.
24. If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be
600 m
700 m
800 m
900 m
25. The included angles of a theodolite traverse, are generally measured
clockwise from the forward station
anti-clockwise from the back station
anti-clockwise from the forward station
clockwise from the back station.
26. Location of contour gradient for a high way is best set out from
ridge down the hill
saddle down the hill
bottom to the ridge
bottom to the saddle.
27. In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm The focussing lens is midway between them when a staff 1650 m away is focussed The focal length of the focussing lens, is
5.24 cm
6.24 cm
7.24 cm
8.24 cm
28. The line normal to the plumb line is known as
horizontal line
level line
datum line
vertical line.
29. The angle of intersection of a curve is the angle between
back tangent and forward tangent
prolongation of back tangent and forward tangent
forward tangent and long chord
back tangent and long chord.
30. Planimeter is used for measuring
volume
area
contour gradient
slope angle
31. In a perfect prismatic compass
magnetic axis and geometric axis of the needle coincide
ends of the needle and pivot are in same vertical and horizontal planes
pivot is vertically over the centre of the graduated circle
all the above.
32. The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as
chromatic aberration
spherical aberration
astigmatism
coma.
33. The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is
28.8 seces
41.25 secs
14.52 secs
25.05 secs
34. The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is
502.685 m
501.345 m
501.340 m
504.030 m
35. It is more difficult to obtain good results while measuringhorizontal distance by stepping
up-hill
down-hill
in low undulations
in plane areas.
36. 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.
37. If deflection angles are measured in a closed traverse, the difference between the sum of the right-hand and that of the left hand angles should be equal to
0°
90°
180°
360°
38. Locating the position of a plane table station with reference to three known points, is known as
intersection method
radiation method
resection method
three point problem.
39. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping
it is possible to set offsets correctly on east side
it is possible to set offsets correctly on east side
it is not possible to set offsets correctly on west side
it is possible to set offsets correctly on both sides.
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