### Civil Engineering - Advanced Surveying MCQs Part 3

1. The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The latitude of the place, is

A.
80°
B.
70°
C.
60°
D.
50°
E.
40°.

2. The true and mean suns occupy the same meridian at the same time on

A.
April 15
B.
June 14
C.
September 1
D.
December 25
E.
all the above.

3. The prime vertical passes through

A.
the east point of the horizon
B.
the west point of the horizon
C.
the zenith point of the observer
D.
E.
all the above.

4. Pick up the correct statement from the following :

A.
The principal point coincides with plumb point on a true vertical photograph
B.
The top of a hill appears on a truly vertical photograph at greater distance than its bottom from the principal point
C.
The top of a hill is represented on a vertical photograph at larger scale than the area of a nearby valley
D.
The planimetric displacement of the point due to relief on a truly vertical photograph is directly proportional to its distance from the principal point and also its elevation
E.
All the above.

5. Homologous point is

A.
photo principal point
B.
ground principal point
C.
ground isocentre
D.
photo isocentre
E.
all the above.

6. Pick up the correct statement from the following :

A. North end of the polar axis is known as north pole
B. South end of the polar axis is known as south pole
C. Point where polar axis when produced northward intersects the celestial sphere, is known as north celestial pole
D. Point where polar axis when produced southward intersects the celestial sphere, is known as south celestial pole
E. all the above.

7. The latitude of a place was obtained by subtracting the declination of a star from its zenith distance, the observed star was between

A. horizon and equator
B. zenith and pole
C. equator and zenith
D. pole and horizon.

8. If S is the sum of three angles of a spherical triangle, the spherical excess equals

A. S - 90°
B. S - 180°
C. S - 270°
D. S - 360°.

9. The want of correspondence in stereo-photographs

A. is a good property
B. is a function of tilt
C. is not affected by the change of flying height between photographs
D. is minimum when θ is 3°.

10. The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between

A. horizon and equator
B. equator and zenith
C. zenith and pole
D. pole and horizon.

11. When a star is between the pole and the horizon, the relationship between latitude (λ), zenith distance (z) and declination δ, is

A. θ = z + δ
B. θ = δ - z
C. θ = 180° - (z + δ)
D. θ = (z + δ) - 180°.

12. The distance between the minor control point and the principal point should be equal to

A. base line of the left photograph of stereo pair
B. base line of the right photograph of stereo pair
C. sum of the base lines of stereo pair
D. mean of the base lines of the stereo pair.

13. The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

A. equator
B. terrestrial equator
C. 0° latitude
D. all the above.

14. The Polaris describes a small circle round the pole whose radius is approximately

A. 1°
B. 2°
C. 3°
D. 4°.

15. The plane at right angle to the zenith-nadir line and passing through the centre of the earth, is called

A. rational horizon
B. true horizon
C. celestial horizon
D. all the above.

16. Pick up the correct statement from the following :

A. The plane passing through the perspective centre of a stereo pair and a ground point, is known as basal plane
B. Each pair of image points on stereo pair have their own basal plane
C. Relative orienation means reconstructing the basal plane
D. Relative orientation of the model is achieved only when five points within the model are cleared of Y-parallax
E. All the above.

17. If α is the observed altitude, the refraction correction in seconds, is

A. 58" cot α
B. 58" tan α
C. 58 sin α
D. 58 cos α.

18. The value of geo-centric parallax to be added to the observed altitude of sun is

A. 9" cos α
B. 9" sin α
C. 9" tan α
D. 9" cot α.

19. With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

A. 7 h 00 m
B. 7 h 30 m
C. 8 h 00 m
D. 8 h 30 m
E. 9 h 00 m.

20. A star is said to elongate

A. when the star momentarily moves vertically
B. when the angle at the star of the spherical triangle is 90°
C. when the star's declination is greater than the observer's latitude
D. all the above.

21. According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

A. tangents of two adjacent parts
B. sines of two adjacent parts
C. cosines of two adjacent parts
D. cosines of two opposite parts
E. both (a) and (b) above.

22. The difference of parallax for a given difference in elevation is independent of

A. focal length of the camera
B. overall size of the photo graphs
C. percentage of overlap
D. all the above.

23. Limiting gradient for locating the base line on evenly-sloping ground, is

A. 1 in 12
B. 1 in 10
C. 1 in 8
D. 1 in 6.

24. Polaris is usually observed for the determination of the latitude when it is

A. at culmination
B. at elongation
C. neither at culmination nor at elongation
D. either at culmination or at elongation.

25. Homologous points are

A. opposite corners of a photograph
B. nodal points of the camera lens
C. corresponding points on the ground and photograph
D. plumb points of stereo pair of photographs.

26. The station pointer is generally used in

A. Triangulation surveying
B. Astronomical surveying
C. Hydrographical surveying
D. Photogrammetric surveying.

27. The angular distance of a heavenly body from the equator, measured along its meridian, is called

A. declination
B. altitude
C. zenith distance
D. co-latitude.

28. The length of a parallel of λ latitude between two meridians is equal to difference in logitudes multiplied by

A. sin λ
B. cos λ
C. tan λ
D. cot λ.

29. The nautical mile is the length of

A. 1 minute of latitude
B. 1 minute of longitude
C. 1 degree of latitude
D. 1 degree of longitude.

30. The meridian of a place is

A. a great circle passing through the place and the poles
B. a great circle whose plane is perpendicular to the axis of rotation and it also passes through the place
C. a semi-circle which passes through the place and is terminated at the poles
D. an arc of the great circle which passes through the place and is perpendicular to the equator.

31. The negative sign is assigned to

A. reduction to mean sea level
B. correction for horizontal alignment
C. correction for slope
D. correction for slope
E. all the above.

32. Pick up the correct statement from the following :

A. The star's movement is apparent due to the actual steady rotation of the earth about its axis
B. The stars move round in circular concentrated parts
C. The centre of the circular paths of stars is the celestial pole
D. The axis of rotation is a fixed direction of a particular diameter of the celestial sphere either end of which is a pole
E. All the above.

33. The method of surveying by triangula-tion was first introduced by the Dutchman Snell in

A. 1600
B. 1615
C. 1630
D. 1650
E. 1680.

34. Right ascension of a heavenly body is its equatorial angular distance measured

A. westward from the first point of Libra
B. eastward from the first point of Aeries
C. westward from the first point of Aeries
D. eastward from the first point of Libra.

35. Pick up the incorrect statement from the following. In a spherical triangle

A. every angle is less than two right angles
B. sum of the three angles is equal to two right angles
C. sum of the three angles less than six right angles and greater than two right angles
D. if the sum of any two sides is π, the sum of the angles opposite them is also π
E. sum of any two sides is greater than the third.

36. The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called

A. equator
B. celestial equator
C. ecliptic
D. none of these.

37. The normal longitudinal overlap is generally kept

A. 50%
B. 60%
C. 70%
D. 75%.

38. Pick up the in-correct statement from the folowing :

A. Correction for refraction is always negative
B. Correction for parallax is always positive
C. Correction for semi-diameter is always negative
D. Correction for dip is always negative
E. None of these.

39. If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is

A.
B.
C.
D.

40. Triangulation surveys are carried out for providing

A. planimetric control
B. height control
C. both planimetric and height control
D. none of these.

41. Sidereal day

A. is the period of time taken by the earth in making a complete rotation with reference to stars
B. is slightly shorter than an ordinary solar day
C. is divided into the conventional hours, minutes and seconds
D. all the above.

42. Pick up the correct statement for horizontal photographs.

A. Parallel lines do not appear parallel in central projection
B. The two sides of a road meet at the vanishing point
C. The lines parallel to the negative plane are projected as parallel lines
D. All the above.

43. If the altitudes of a star at its upper and lower transits are 60° 30' and 19° 30' respectively, the latitude of the place, is

A. 30°
B. 35°
C. 40°
D. 45°.

44. The point on the photograph where bisector between the vertical line through optical centre of the camera lens and the plate perpendicular meets, is known as

A. principal point
B. isocentre
C. plumb point
D. perspective centre.

45. In a truly vertical photograph,

A. principal point coincides the isocentre
B. iso-centre coincides the plumb point
C. plumb point coincides the principal point
D. principal point, iso-centre and plumb point coincide
E. all the above.

46. 23 cm x 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

A. 1 m
B. 2 m
C. 3 m
D. 4 m
E. 5 m.

47. For a spherical triangle ABC, pick up incorrect statement

A.
B.
C.
D.
E. none of these.

48. A plate parallel is the line on the plane of the negative

A. parallel to the principal line
B. perpendicular to the principal line
C. along the bisector of the angle between the principal line and a perpendicular line through principal plane
D. none of these.

49. The great circle which passes through the zenith, nadir and the poles, is known as

A. meridian
B. vertical circle
C. prime vertical
D. none of these.

50. In triangulation surveys

A. the area is divided into triangular figures
B. control stations are located from which detailed surveys are carried out
C. sides are not measured excepting the base line
D. angular measurements are only resorted to
E. all the above.