### Civil Engineering - Advanced Surveying MCQs Part 1

1. The point on the celestial sphere vertically below the observer's position, is called

A.
zenith
B.
celestial point
C.
D.
pole.

2. The parallax equation 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).

3. 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.

4. Latitude of a place is the angular distance from

A.
Greenwich to the place
B.
equator to the poles
C.
equator to the nearer pole
D.
equator to the nearer pole along the meridian of the place
E.
none of these.

5. International date line is located along

A.
standard meridian
B.
Greenwich meridian
C.
equator
D.
180° longitude
E.
none of these.

6. The shortest distance between two places measured along the surface of the earth, is

A. length of the equator between their longitudes
B. length of the parallel between their longitudes
C. length of the arc of the great circle passing through them
D. none of these.

7. The correction for parallax, is

A. - 8".8 cos α
B. + .8" sin α
C. + 8".8 cos α
D. - 8".8 cos α.

8. The angle between the plane of the equator and the plane of the ecliptic, is known as obliquity of the ecliptic and its value is

A. 22° 30'
B. 23° 27'
C. 23° 30'
D. 24° 0'.

9. Systematic errors

A. always follow some definite mathematical law
B. can be removed by applying corrections to the observed values
C. either make the result too great or too small
D. are also known as cumulative errors
E. all the above.

10. Perspective centre relates to

A. parallel projection
B. orthogonal projection
C. central projection
D. none of these.

11. 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
E. azimuth and declination system.

12. In a tropical year, the number of sidereal days, are

A. 365
B. 365.2224
C. 365.2422
D. 366.2422
E. 366.2224.

13. Pick up the correct statement from the following :

A. Sidereal time at any instant is equal to the hour angle of the first point of Aries
B. Local sidereal time of any place is equal to the right ascension of its meridian
C. Sidereal time is equal to the right ascension of a star at its upper transit
D. All the above.

14. Polaris is usually observed for the determination of the azimuth when it is

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

15. The latitude (λ) of a place and the altitude (α) of the pole are related by

A. λ = α
B. λ = 90° - α
C. λ = α - 90°
D. λ = 180° - α.

16. If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good

A.
B.
C.
D. all the above.

17. Places having same latitude

A. lie on the parallel of the latitude
B. are equidistant from the nearer pole
C. are equidistant from both the poles
D. are equidistant from the equator
E. all the above.

18. 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.
C.
D.

19. 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.

20. The scale of a vertical photograph of focal length f taken from height of H metres above M.S.L., at a point of reduced level h, is

A.
B.
C.
D.

21. If the general ground level of any area is 10% of the flying height, the principal points may be used as the centres of radial directions for small scale mapping even in tilted photograph up to

A. 1°
B. 2°
C. 3°
D. 4°

22. 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.

23. The relief displacement of a minar 72 m high on photograph is 7.2 mm and its top appears 10 cm away from principal point. The flying height of the camera, is

A. 500 m
B. 1000 m
C. 1500 m
D. 2000 m.

24. Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

A. by subtracting their longitudes if places are in the same hemisphere
B. by adding their longitudes if places are in the different hemispheres
C. by subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
D. all the above.

25. While making astronomical observations, the observer is mainly concerned with

A. the direction of the vertical, the axis of rotation of the instrument
B. the direction of the poles of the celestial sphere
C. the direction of the star from the instrument
D. all the above.

26. At western elongation, the pole star moves

A. eastward
B. westward
C. northward
D. southward.

27. Pick up the correct statement from the following :

A. Refraction correction is zero when the celestial body is in the zenith
B. Refraction correction is 33' when the celestial body is on the horizon
C. Refraction correction of celestial bodies depends upon their altitudes
D. all the above.

28. The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian + longitude :

A. mean sun
B. true sun
C. vernal equinox
D. star
E. all the above.

29. By raising the z-column of right projector, maximum y-parallax is introduced in the model at

A. position 1
B. position 2
C. position 4
D. position 6
E. position 4 and 6.

30. 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.

31. 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.

32. Accidental errors

A. do not follow any definite mathematical law
B. cannot be removed by applying corrections to the observed values
C. are generally small
D. are also known as compensating errors
E. all the above.

33. If θ and δ be the latitude of a place and declination of a star respectively, the upper culmination of the star will be north of zenith if its zenith distance, is

A. δ - θ
B. θ - δ
C. θ + δ
D. .

34. In a tropical year, the number of sidereal days are

A. one less than mean solar days
B. one more than mean solar days
C. equal to mean solar days
D. none of these.

35. The position of a heavenly body on the celestial sphere can be completely specified by

A. its altitude and azimuth
B. its declination and hour angle
C. its declination and right ascension
D. all the above.

36. The angle between the axis of earth and the vertical at the station of observation is called

A. astronomical latitude
B. astronomical co-latitude
C. co-declination of star
D. declination of star.

37. For any star to be a circumpolar star, its

A. declination must be 0°
B. declination must be 90°
C. distance from the pole must be less than the latitude of the observer
D. hour angle must be 180°.

38. The elevation of the star at elongation is obtained by

A. sin α = sin φ cosec δ
B. sin α = sin φ sec δ
C. sin α = cos φ sec δ
D. sin α = cos φ cosec δ.

39. The necessary geometrical condition for triangulation adjustment, is :

A. The sum of the angles around a station should be 360°
B. The sum of the three angles of a plane triangle should be 180°
C. The sum of the eight angles of a braced quadrilateral should be 360°
D. All the above.

40. The correction applied to the measured base of length L is

A.
B. where w is the weight of tape/m
C. where h is height difference of end supports
D. Reduction to mean sea level =
E. all the above.

41. The angle between the direction of star and the direction of earth's axis of rotation is called

A. co-declination
B. co-latitude
C. declination
D. latitude.

42. If v, t and are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement

A.
B.
C.
D.

43. 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.

44. The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called

A. visible horizon
B. sensible horizon
C. celestial horizon
D. true horizon
E. none of the above.

45. If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is

A. δ - θ
B. θ - δ
C. θ + δ
D. (θ - δ).

46. Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel

A. 24%
B. 36%
C. 40%
D. 60%.

47. Triangulation surveys are carried out for locating

A. control points for surveys of large areas
B. control points for photogrammetric surveys
C. engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
D. all the above.

48. The movement of the projector in y-direction, introduces in the model a y-parallax

A. maximum at position 1
B. maximum at position 2
C. maximum at position 5 and 6
D. maximum at positions 3 and 4
E. equally throughout the model.