1000+ Advanced Surveying MCQ for DRDO [Solved]

1. If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is
A. ?R²E/90°
B. ?R²E/180°
C. ?R²E/270°
D. ?R²E/360°
Answer : B

2. The station where observations are not made, but the angles at the station are used in triangulation series, is known as
A. Satellite station
B. Subsidiary station
C. Pivot station
D. Main station
Answer : C

3. The First Point of Aeries
A. Is the point in the celestial sphere where zero meridian crosses the celestial equator
B. Is usually denoted by the Greek letter ?
C. Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
D. All the above
Answer : D

4. If ? is the declination of the Polaris and ? is the latitude of the place, the azimuth of the Polaris, is
A. cos ?/cos ?
B. cos (90° - ?)/cos (90° - ?)
C. sin (90° - ?)/sin (90° - ?)
D. tan (90° + ?)/tan (90° + ?)
Answer : A

5. If two points differing by 1° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about
A. 10 km
B. 25 km
C. 30 km
D. 50 km
Answer : C

6. In a truly vertical photograph,
A. Principal point coincides the isocenter
B. Iso-centre coincides the plumb point
C. Plumb point coincides the principal point
D. All the above
Answer : D

7. Triangulation surveys are carried out for providing
A. Planimetric control
B. Height control
C. Both planimetric and height control
D. None of these
Answer : C

8. The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height H is 100 m. If mean photo base is 95.2 mm, the flying height is
A. 8,000 m
B. 10,000 m
C. 12,000 m
D. 14,000 m
Answer : C

9. The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
A. f/H sec ?
B. f sec ?/H
C. f/H
D. f/H cos ½?
Answer : A

10. The height displacement on a vertical photograph
A. Increases as the horizontal distance increases from the principal point
B. Increases as the ground elevation increases
C. Decreases as the flying height increases
D. All the above
Answer : D

11. Circumpolar stars
A. Rotate round the North Pole
B. Rotate round the celestial pole
C. Remain always above the horizon
D. Are seldom seen near the pole star
Answer : C

12. For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through
A. Isocenter
B. Plumb point
C. Principal point
D. None of these
Answer : A

13. Perspective centre relates to
A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these
Answer : C

14. 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. All the above
Answer : D

15. The normal longitudinal overlap is generally kept
A. 50 %
B. 60 %
C. 70 %
D. 75 %
Answer : B

16. The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as
A. Isocenter
B. Principal point
C. Perspective centre
D. Plumb line
Answer : B

17. Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
A. 24 %
B. 36 %
C. 40 %
D. 60 %
Answer : B

18. Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year
A. Once
B. Twice
C. Thrice
D. Four times
Answer : D

19. The parallax equation ?p = Bm?h/H - h is applicable to entire overlap of the photographs only if parallax is measured
A. Normal to base line
B. Parallel to base line
C. Both (a) and (b)
D. Neither (a) nor (b)
Answer : B

20. The negative sign is assigned to
A. Reduction to mean sea level
B. Correction for horizontal alignment
C. Correction for slope
D. All the above
Answer : D

21. The point on the celestial sphere vertically below the observer's position, is called
A. Zenith
B. Celestial point
C. Nadir
D. Pole
Answer : C

22. Spring tides are caused when
A. Sun and moon are in line with earth
B. Solar idal force acts opposite to lunar tidal force
C. Solar tidal force and lunar tidal force both coincide
D. None of these
Answer : C

23. Pick up the correct statement from the following:
A. The angle between the plane of the negative and the horizontal plane containing perspective axis is the tilt of the photograph
B. The direction of maximum tilt is defined by the photo principal line
C. The principal plane is truly vertical plane which contains perspective centre as well as principal point and plumb point
D. All the above
Answer : D

24. 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
Answer : D

25. The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is
A. B = bH/f
B. B =f/bH
C. B = b/fH
D. B = H/bf
Answer : A

26. The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is
A. 4.4 mm
B. 5.5 mm
C. 6.5 mm
D. 7.5 mm
Answer : D

27. The declination and right ascension of the sun becomes 23° 27' N and 90° respectively on
A. March 21
B. June 21
C. September 21
D. December 22
Answer : B

28. The sun's declination remains north between
A. March 21 to June 21
B. June 21 to September 21
C. September 21 to December 21
D. Both (a) and (b) of above
Answer : D

29. Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is
A. Co-declination
B. Co-altitude
C. Co-latitude
D. Polar distance
Answer : A

30. The difference in longitude of two places expressed in time is equal to the difference in their
A. Sidereal time
B. Apparent solar time
C. Mean solar time
D. All the above
Answer : D

31. The method of surveying by triangulation was first introduced by the Dutchman Snell in
A. 1600
B. 1615
C. 1630
D. 1650
Answer : B

32. The length of a parallel of ? latitude between two meridians is equal to difference in longitudes multiplied by
A. sin ?
B. cos ?
C. tan ?
D. cot ?
Answer : B

33. The distance between the projection centre and the photograph, is called
A. Principal distance
B. Principal line
C. Isocentric distance
D. Focal length
Answer : A

34. The Polaris remains below horizon at
A. 10° N
B. 50° N Latitude
C. Equator
D. 5° S latitude
Answer : D

35. The solar tidal force divided by lunar tidal force is
A. 1/3
B. 1/2
C. 3/4
D. 5/4
Answer : B

36. To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30, 000, with a camera of 30 cm focal length, the flying height is
A. 4000 m
B. 5000 m
C. 6000 m
D. 7000 m
Answer : C

37. The latitude of the observer's position, is
A. Elevation of the elevated pole
B. Declination of the observer's zenith
C. Angular distance along the observer's meridian between equator and the observer
D. All the above
Answer : D

38. 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 orientation means reconstructing the basal plane
D. All the above
Answer : D

39. The altitude of a circumpolar star is maximum when it is
A. At east elongation
B. At upper culmination
C. At west elongation
D. At lower culmination
Answer : B

40. The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is
A. Altitude and azimuth system
B. Declination and hour angle system
C. Declination and right ascension system
D. Declination and altitude system
Answer : C

41. The declination and right ascension of the sun becomes 23° 27' S and 270° respectively on
A. March 21
B. June 21
C. September 21
D. December 22
Answer : D

42. The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as
A. Satellite station
B. Eccentric station
C. False station
D. Pivot station
Answer : D

43. On vertical photographs, height displacement is
A. Positive for points above datum
B. Negative for points below datum
C. Zero for points vertically below the air station
D. All the above
Answer : D

44. The stereo plotting instruments are generally manufactured on the principle of
A. Optical projection
B. Optical mechanism projection
C. Mechanical projection
D. All the above
Answer : D

45. 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°
Answer : C

46. G.M.T. corresponding to given mean time, equals
A. L.M.T. - East longitude in time
B. L.M.T. + East longitude in time
C. L.M.T. - West longitude in time
D. None of these
Answer : A

47. If f is the focal length of the camera lens and ? is the angle of tilt, the distance of the plumb point from the principal point will be
A. f sin ?
B. f cos ?
C. f tan ?
D. f sec ?
Answer : C

48. The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is
A. 80°
B. 70°
C. 60°
D. 50°
Answer : C

49. The equation which is obtained by multiplying each equation by the coefficient of its un-knowns and by adding the equations thus formed, is known as
A. Observation equation
B. Conditional equation
C. Normal equation
D. None of these
Answer : C

50. At eastern elongation, the pole star moves
A. Eastward
B. Westward
C. Northward
D. Southward
Answer : C