Advanced Surveying Multiple Choice Questions
1. The correction for parallax, is
A. – 8″.8 cos α
B. + .8″ sin α
C. + 8″.8 cos α
D. – 8″.8 cos α.
Answer: C
2. 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′.
Answer: B
3. 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.
Answer: E
4. Perspective centre relates to
A. parallel projection
B. orthogonal projection
C. central projection
D. none of these.
Answer: C
5. 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
6. 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
7. 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.
Answer: E
8. International date line is located along
A. standard meridian
B. Greenwich meridian
C. equator
D. 180° longitude
E. none of these.
Answer: D
9. 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.
Answer: C
10. 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.
Answer: C
11. In a tropical year, the number of sidereal days, are
A. 365
B. 365.2224
C. 365.2422
D. 366.2422
E. 366.2224.
Answer: D
12. 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.
Answer: D
13. 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.
Answer: B
14. 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.
Answer: A
15. 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
16. 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.
Answer: E
17. 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°
Answer: C
18. 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
19. 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.
Answer: B
20. 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.
Answer: C
21. 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.
Answer: D
22. At western elongation, the pole star moves
A. eastward
B. westward
C. northward
D. southward.
Answer: D
23. 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.
Answer: D
24. 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.
Answer: E
25. 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.
Answer: E
26. 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
27. 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
28. 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.
Answer: E
29. 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.
Answer: B
30. 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.
Answer: D
31. 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.
Answer: B
32. 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°.
Answer: C
33. 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.
Answer: D
34. 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.
Answer: A
35. 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
36. 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.
Answer: D
38. 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.
Answer: E
39. In field astronomy, the quantities observed are entirely
A. lengths
B. angles
C. heights
D. all of these.
Answer: B
40. The orthogonal projection of the perspective centre on a tilted photograph, is called
A. nadir
B. isocentre
C. principal point
D. plumb point.
Answer: C
41. The principal plane contains
A. nadir point
B. iso centre
C. principal point
D. principal axis and principal line
E. all the above..
Answer: E
42. The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as
A. photo plumb point
B. plumb point
C. nadir point
D. isocentre
E. none of these.
Answer: A
43. Pick up the correct statement from the following :
A. Aerial photographs may be either vertical or oblique
B. Vertical photographs are taken with the axis of camera pointing vertically downward
C. Vertical photographs are used for most accurate maps
D. On oblique photographs, scale variation is larger as compared to that of vertical photographs
E. all the above.
Answer: E
44. An aerial photograph may be assumed as
A. parallel projection
B. orthogonal projection
C. central projection
D. none of these.
Answer: C
45. If the equatorial distance between two meridians is 100 km, their distance at 60° latitude will be
A. 1000 km
B. 800 km
C. 600 km
D. 500 km
E. 400 km.
Answer: D
46. 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
E. 10 mm
Answer: D
47. The net ground area of a vertical photograph 20 cm x 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is
A. 0.50 sq km
B. 0.56 sq km
C. 0.60 sq km
D. 0.64 sq km.
Answer: D
48. The position of the sun when its north declination is maximum is known as
A. vernal equinox
B. Autumnal equinox
C. summer solstice
D. winter solstice.
Answer: C
49. Pick up the correct statement from the following :
A. the vertical plane containing the zenith, the station of observation and the celestial pole is the observer’s meridian plane.
B. the angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star.
C. the complement of the altitude of star is called the zenith distance of the star.
D. all the above.
Answer: D
50. For mapping any country
A. geodetic triangulation of greatest possible sides and accuracy is carried out
B. primary triangles are broken down into secondary triangles of somewhat lesser accuracy
C. secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
D. all the above.
Answer: D
51. If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1 : 50,000 , will be
A. 1 cm
B. 2 cm
C. 3 cm
D. 4 cm
E. 5 cm.
Answer: D
52. The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as
A. isocentre
B. principal point
C. perspective centre
D. plumb line.
Answer: B
53. The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as
A. ground principal point
B. ground plumb point
C. iso-centre
D. perspective centre.
Answer: B
54. At eastern elongation, the pole star moves
A. eastward
B. westward
C. northward
D. southward.
Answer: C
55. 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
E. none of these.
Answer: C
56. By applying clockwise swing to right projector, maximum y-parallax is introduced in the model at
A. position 1
B. position 2
C. position 4
D. position 6.
Answer: A
57. The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is
A. 1 : 10,000
B. 1 : 15,000
C. 1 : 20,000
D. 1 : 30,000.
Answer: C
58. A nautical mile is
A. one minute arc of the great circle passing through two points
B. one minute arc of the longitude
C. 6080 ft
D. 1855.109 m
E. all the above.
Answer: E
59. The following points form a pair of homologous points :
A. Photo principal point and ground principal point
B. Photo isocentre and ground isocentre
C. Photo plumb point and ground plumb point
D. all the above.
Answer: D
60. 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. north or south according as the observer is north of equator or south of equator
E. all the above.
Answer: E
61. The moon rotates round the earth once in every
A. 29 days
B. 29.35 days
C. 29.53 days
D. 30 days.
Answer: B
62. 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 γ
C. is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda.
D. all the above.
Answer: D
63. The parallax of a point on the photograph is due to
A. ground elevation
B. flying height
C. length of air base
D. focal length of the camera.
E. all the above.
Answer: E
64. A star may culminate at zenith if its declination is
A. greater than the longitude of the place
B. less than the latitude of the place
C. equal to the latitude of the place
D. none of these.
Answer: C
65. For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are
A. two angle equations and two side equations
B. one angle equation and three side equations
C. three angle equations and one side equation
D. none of these.
Answer: C
67. Longitude of a place is the angular distance between the meridian of the place and
A. the standard meridian
B. the international date line
C. that of Greenwich
D. both (a) and (c) of above.
Answer: D
68. The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than
A. 0.01 second
B. 0.001 second
C. 0.0001 second
D. none of these.
Answer: C
69. 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
70. Spring tides are caused when
A. sun and moon are in line with earth
B. solar tidal force acts opposite to lunar tidal force
C. solar tidal force and lunar tidal force both coincide
D. none of these.
Answer: C
71. The average eye base is assumed as
A. 58 mm
B. 60 mm
C. 62 mm
D. 64 mm
E. 72 mm.
Answer: D
72. Pick up the correct statement from the following :
A. One degree of longitude has greatest value at the equator
B. One degree of longitude has greatest value at the poles
C. One degree of longitude has the same value everywhere
D. One degree of latitude decreases from the equator to the poles
E. One degree of latitude has greatest value at the poles.
Answer: A
73. Pick up the incorrect statement from the following :
A. Latitudes north of the equator are taken as positive
B. Latitudes south of the equator are taken as negative
C. Longitudes east of Greenwich are taken as negative
D. Longitudes west of Greenwich are taken as positive.
E. Both (c) and (d) of the above.
Answer: C
74. 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
75. If the image of a triangulation station of R.L. 500 m is 4 cm from the principal point of a vertical photo taken from an altitude of 2000 m, above datum, the height displacement will be
A. 2 mm
B. 4 mm
C. 6 mm
D. 8 mm
E. 10 mm.
Answer: E
76. The flying height of the camera is 1, 000 m above mean ground level, the distance of the top of a Minar from a nadir point is 10 cm and the relief displacement of Minar is 7.2 mm. The height of the Minar, is
A. 52 m
B. 62 m
C. 72 m
D. 82 m.
Answer: C
77. 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
78. Rotation of the camera at exposure about its vertical axis, is known as
A. swing
B. tilt
C. tip
D. none of these.
Answer: A
79. 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
80. Assuming human normal vision distance 25 cm, smallest measurable angle 20″, and introcular distance 6.5 cm, the smallest depth to be discerned is
A. 0.1 mm
B. 0.5 mm
C. 1.00 mm
D. 1.1 mm.
Answer: A
81. The main object of the astronomer to obtain
A. astronomical latitude
B. astronomical longitude
C. astronomical bearing
D. all of these.
Answer: D
82. If f is the focal length of the camera lens and θ is the angle of tilt, the distance of the plumb point from the principal point will be
A. f sin θ
B. f cos θ
C. f tan θ
D. f sec θ.
Answer: C
83. Pick up the incorrect statement from the following. High oblique photographs
A. may have tilt up to 30°
B. may include the image of the horizon
C. may not include the image of the horizon
D. none of these.
Answer: D
84. 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°.
Answer: E
85. 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.
Answer: E
86. 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. the nadir point of horizon
E. all the above.
Answer: E
87. 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.
Answer: E
88. Homologous point is
A. photo principal point
B. ground principal point
C. ground isocentre
D. photo isocentre
E. all the above.
Answer: E
89. 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.
Answer: E
90. 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.
Answer: A
91. 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°.
Answer: B
92. 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°.
Answer: B
93. 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.
Answer: C
94. 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
95. 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.
Answer: D
96. The Polaris describes a small circle round the pole whose radius is approximately
A. 1°
B. 2°
C. 3°
D. 4°.
Answer: A
97. 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.
Answer: D
98. 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.
Answer: E
99. 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.
Answer: A
100. 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.
Answer: A
101. 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.
Answer: E
102. 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.
Answer: D
103. 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.
Answer: E
104. 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.
Answer: D
105. 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.
Answer: A
106. 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.
Answer: A
107. 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.
Answer: C
108. The station pointer is generally used in
A. Triangulation surveying
B. Astronomical surveying
C. Hydrographical surveying
D. Photogrammetric surveying.
Answer: C
109. 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.
Answer: A
110. 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.
Answer: B
111. 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.
Answer: B
112. 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.
Answer: C
113. 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.
Answer: E
114. 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.
Answer: E
115. 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.
Answer: B
116. 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.
Answer: B
117. 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.
Answer: B
118. 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.
Answer: C
119. The normal longitudinal overlap is generally kept
A. 50%
B. 60%
C. 70%
D. 75%.
Answer: B
120. 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.
Answer: C
121. 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
122. 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.
Answer: D
123. 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.
Answer: D
124. 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
125. 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.
Answer: B
126. 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.
Answer: E
127. 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.
Answer: B
128. 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.
Answer: A
129. 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.
Answer: E
130. 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.
Answer: A
131. 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
132. 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
133. The zenith is the point on the celestial sphere
A. east of observer
B. west of observer
C. north of observer
D. south of observer
E. above the observer.
Answer: D
134. 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
E. five times.
Answer: D
135. To have greatest coverage of the area, the type of photography used, is
A. high oblique
B. low oblique
C. vertical
D. none of these.
Answer: A
136. The sidereal day is the time interval between two successive upper transits of
A. mean sun
B. first point of Aries
C. first point of Libra
D. the polar star
E. moon.
Answer: B
137. Pick up the correct statement from the following :
A. the horizontal direction of the pole is called astronomical north.
B. the angle between the direction of true north and the direction of a survey line is called astronomical bearing
C. the astronomical bearing is generally called azimuth
D. all the above.
Answer: D
138. Pick up the in-correct statement from the following :
A. Apparent solar time is measured from the lower transit of the true sun
B. Mean solar time is measured from the lower transit of the mean sun
C. Sidereal time is measured from the lower transit of the first point of Aries
D. Sidereal time is measured from the upper transit of the first point of Aries.
Answer: D
139. 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
140. Stellar astronomy deals with
A. plane surveying
B. geodetic surveying
C. star observations
D. planet observations.
Answer: C
141. If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is
A. 10°
B. 20°
C. 30°
D. 40°
E. 60°.
Answer: C
142. The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is
A. 5100 nautical miles
B. 5700 nautical miles
C. 120 nautical miles
D. 500 nautical miles
E. none of these.
Answer: B
143. The point at which sun’s declination changes from north to south, is known as
A. first point of Aeries
B. first point of Libra
C. vernal Equinox
D. autumnal Equinox
E. both (b) and (d) of the above.
Answer: E
144. Pick up the incorrect statement from the following :
A. In truly vertical photographs without relief angles are true at the plumb point
B. In tilted photographs without relief, angles are true at the iso-centre
C. In tilled photographs with relief, angles are true at the principal point.
D. none of these.
Answer: C
145. A star in northern sphere is said to transit
A. when its altitude is maximum
B. when its azimuth is 180°
C. when it is in south
D. all the above.
Answer: D
146. In observations of equal precision, the most probable values of the observed quantities are those that render the sum of the squares of the residual errors a minimum, is the fundamental principle of
A. Gauss’ Mid Latitude formula
B. Delamber’s method
C. Legendr’s method
D. Least square method.
Answer: D
147. Pick up the incorrect statement from the following. The angular distance of hevenly bodies on observer’s meridian measured from the pole, is
A. co-declination
B. co-altitude
C. co-latitude
D. polar distance
E. none of these.
Answer: A
148. Pick up the correct statement from the following :
A. Centre of the celestial sphere is taken as the position of the observer
B. Centre of the celestial sphere is taken as the centre of the earth
C. stars move and maintain their relative positions
D. Celestial bodies though fixed, appear to revolve from east to west round the celestial pole.
E. All the above.
Answer: E
149. Parallax bar measures
A. parallax
B. height
C. parallax difference
D. height difference.
Answer: C
150. The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above
A. equator
B. horizon
C. pole
D. none of these.
Answer: B
151. In a spherical triangle ABC, right angled at C, sin b equals
A. sin a cos A
B. cos a sin A
C. tan a cot A
D. cot A tan a
E. none of these.
Answer: C
152. Pick up the correct statement from the following :
A. Ursa Minor’s remains always north of pole star
B. Polar star remains always north of Polaris
C. Polaris remains always north of Ursa Minor’s
D. Ursa Minor’s pole star and polaris are the names of the same star.
Answer: D
153. In a spherical triangle ABC right angled at C, sin b equals to
A. sin c sin B
B. cos c cos B
C. tan c tan B
D. sin c cos B
E. cos c sin B.
Answer: A
154. The slotted template method
A. is prepared, by graphical method
B. is suitable for large areas with less control
C. is rapid and accurate
D. may be done on any scale
E. all the above.
Answer: E
155. The principal line is the line joining the principal point and
A. nadir
B. isocentre
C. perspective centre
D. none of these.
Answer: B
156. Longitudes are measured from 0° to
A. 180° eastward
B. 180° westward
C. 180° east or westward
D. 360° eastward
E. 360° westward.
Answer: C
157. If the distance between the projectors is altered by a movement along X-axis of one projector,
A. the length of the air base is increased
B. the scale of the model is altered
C. y-parallax is not affected
D. relative orientation is not affected
E. all the above.
Answer: E
158. Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as
A. swing
B. tilt
C. tip
D. none of these.
Answer: C
159. At lower culmination, the pole star moves
A. eastward
B. westward
C. northward
D. southward.
Answer: A
160. If δ is the declination of the star and φ is the latitude of the observer, then the azimuth of the star at elongation is given by
A. sin z = sec φ . cos δ
B. cos z = sec φ . cos δ
C. tan z = sec φ . cos δ
D. none of these.
Answer: A
161. 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°
E. 40°.
Answer: C
162. The angle between the observer’s meridian and declination circle of a heavenly body, is known as
A. hour angle
B. azimuth
C. right ascension
D. declination.
Answer: A
163. Pick up the correct statement from the following :
A. The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
B. The difference between the absolute parallax of two points depends upon the difference in their elevations
C. The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
D. all the above.
Answer: D
164. For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through
A. isocentre
B. plumb point
C. principal point
D. none of these.
Answer: A
165. 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. December 21 to Mach 21
E. both (a) and (b) of above.
Answer: E
165. The time interval between successive transits of the moon, is
A. 24 hours 10 minutes
B. 20 hours 25 minutes
C. 24 hours 50 minutes
D. 23 hours 50 minutes
E. 23 hours 25 minutes.
Answer: C
166. At the first point of Aeries, the sun moves
A. northward
B. southward
C. from south to north of the equator
D. from north to south of the equator.
Answer: C
167. The declination and right ascension of the sun are each equal to zero on
A. March 21
B. June 21
C. September 21
D. December 22.
Answer: A
168. From the principal point the horizon point lies on the principal line at a distance of
A. f tan θ
B. f sin θ
C. f cot θ
D. f cos θ.
Answer: A
169. The polaris remains below horizon at
A. 10° N
B. 50° N Latitude
C. equator
D. 5° S latitude.
Answer: D
170. If δ is the declination of the star and φ is the latitude of the observer then the hour angle of the star at elongation is given by
A. sin H = tan φ . cot δ
B. cos H = tan φ . cot δ
C. tan H = tan φ . cot δ
D. none of these.
Answer: B
171. At upper culmination, the pole star moves
A. eastward
B. westward
C. northward
D. southward.
Answer: B
172. 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 the these.
Answer: A
173. Latitude of the observer’s position is equal to altitude of
A. north pole
B. pole star
C. celestial pole
D. all the above.
Answer: C
174. Pick up the correct statement from the following :
A. If the applied tension to the tape is more than the standard, the tension correction is positive
B. If the applied tension to the tape is less than the standard, the tension correction is negative
C. If the temperature during measurement is greater than the standard temperature, the temperature correction is positive
D. If the temperature during measurement is lower than the standard temperature, temperature correction is negative
E. All the above.
Answer: E
175. 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
176. The coverage is least if photography is
A. high oblique
B. low oblique
C. vertical
D. none of these.
Answer: C