# Advanced Surveying MCQs Practice Set

**1. If the equatorial distance between two meridians is 100 km, their distance at 60 ^{o }latitude will be**

**1000 km**

**600 km**

**800 km**

**500 km (Ans)**

**400 km**

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

**every angle is less than two right angles**

**sum of the three angles is equal to two right angles (Ans)**

**sum of the three angleless than six right angles and greater than two right angles**

**if the sum of any two sides is ꙥ, the sum of the angles opposite them is also ꙥ**

**sum of any two sides is greater than the third.**

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

**tangents of two adjacent parts****sines of two adjacent parts****cosines of two adjacent parts****cosines of two opposite parts****both (a) and (b) above (Ans)**

**4. In a spherical triangle ABC ,right angled at C, sin b equals**

**sin a cos A****cos a sin A****tan a cot A (Ans)****cot A tan a****none of these**

**5. In a spherical triangle ABC ,right angled at C, sin b equals to**

**sin c sin B (Ans)****cos a cos B****tan c tan B (Ans)****sin c cos B****cos c sin B**

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

- ꙥ
**R**^{2}E/ 90^{o} - ꙥ
**R**^{2}E/ 180^{o }(Ans) - ꙥ
**R**^{2}E/ 270^{o} - ꙥ
**R**^{2}E/ 360^{o}

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

**S – 90**^{o}**S – 180**^{o}(Ans)**S – 270**^{o}**S – 360**^{o}

**8. The greate circule whose plane is perpendicular to the axis of rotation of the earth, is called**

**equator****terrestrial equator****0**^{o }latitude**all the above (Ans)**

**9. The meridian of a place is**

**a great circle passing through the place and the poles****a great circle whose plane is perpendicular to the axis of rotation and it also passes through the place****a semi-circle which passes through the place and is terminated at the poles (Ans)****an arc of the great circle which passes through the place and is perpendicular to the equator**

**10. Latitude of a place is the angular distance from**

**Greenwich to the place****equator to the poles****equator to the nearer pole****equator to the nearer pole along the meridian of the place****none of these (Ans)**

**11. Longitude of a place is the angular distance between the meridian of the place and**

**the standard meridian****the international date line****that of Greenwich****both (a) and (c) of above (Ans)**

**12. Longitude are measured from 0 ^{o }to**

**180**^{o }eastward**180**^{o }westward**180**^{o }east or westward (Ans)**360**^{o }eastward**360**^{o }westward

**13. International dateline is located along**

**standard meridian****Greenwich meridian****equator****180**^{o }longitude (Ans)**none of these**

**14. Pick up the incorrect statement from the following**

**latitudes north of the equator are taken as positive****latitudes south of the equator are taken as negative****longitudes east of Greenwich are taken as negative (Ans)****longitudes west of Greenwich are taken as positive****both (a) and (d) of the above**

**15. Places having same latitude**

**lie on the parallel of the latitude****are equidistant from the nearer pole****are equidistant from both the poles****are equidistant from the equator****all the above (Ans)**

**16. The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by**

**sin λ**

**cos λ (Ans)**

**tan λ**

**cot λ**

**17. Pick up the correct statement from the following**

**one degree of longitude has greatest value at the equator (Ans)****one degree of longitude has greatest value at the poles****one degree of latitude decreases from the equator to the poles****one degree of latitude has greatest value at the poles**

**18. A nautical mile is**

**one minute arc of the great circle passing through two points****one minute arc of the longitude****6080 ft****1855.109 m****all the above (Ans)**

**19. The longitudes of two places at latitude 60 ^{o }N are 93^{o}**

**E and 97**^{o }w. Their departure is**5100 nautical miles****5700 neutical miles (Ans)****120 neutical miles****500 neutical miles**

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

**by subtracting their longitudes if places are in the same hemisphere****by adding their longitudes if places are in the different hemispheres****by subtracting the sum of their longitudes exceeding 180**^{o }from 360^{o }if places are in different hemispheres (Ans)**all the above**

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

**length of the equator between their longitudes**

**length of the parallel between their longitudes**

**length of the arc of the great circle passing through them (Ans)**

**none of these**

**22. Pick up the correct statement from the following:**

**centre of the celestial sphere is taken as the position of the observer**

**centre of the celestial sphere is taken as the centre of the earth**

**stars move and maintain their relative positions**

**celestial bodies through fixed, appear to revolve from east to west round the celestial pole.**

**All the above (Ans)**

**23. The zenith is the point on the celestial sphere**

**east of observer**

**west of observer**

**north of observer**

**south of observer (Ans)**

**above the observer.**

**24. The point on the celestial sphere vertically below the observer’s position, is called**

**zenith**

**celestial point**

**nadir (Ans)**

**pole**

**25. The plane at right angle to the zenith nador line and passing through the centre of the earth, is called**

**rational horizon**

**true horizon**

**celestial horizon**

**all the above (Ans)**

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

**visible horizon**

**sensible horizon (Ans)**

**celestial horizon**

**true horizon**

**none of the above **

**27. Pick up the correct statement from the following :**

**north end of the polar axis is known as north pole**

**south end of the polar axis is known as south pole**

**point where polar axis when produced northward intersects the celestial sphere, is known as north celestial pole**

**point where polar axis when produced southward intersects the celestial sphere, is known as south celestial pole**

**all the above (Ans)**

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

**equator**

**celestial equator**

**ecliptic (Ans)**

**none of these**

**29. 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**

**22 ^{o}30′**

**23 ^{o}27′ (Ans)**

**23 ^{o}30′**

**24 ^{o}0′**

**30. At the first point of Aeries, the sun moves**

**northward**

**southward**

**from south to north of the equator (Ans)**

**from north to south of the equator**

**31. The point at which sun’ s declination changes from north to south, is known as**

**first point of Aeries**

**first point of Libra**

**vernal equinox**

**autumnal equinox**

**both (b) and (d) of the above (Ans)**

**32. The position of the sun when its north declination is maximum is known as**

**venal equinox**

**autumnal equinox**

**summer solstice (Ans)**

**winter solstice**

**33. The declination and right ascension of the sun are each equal to zero on**

**March 21 (Ans)**

**June 21**

**September 21**

**December 22**

**34. The declination and right ascension of the sun becomes 23 ^{o}27′ N and 90^{o }respectively on**

**March 21**

**June 21 (Ans)**

**September 21**

**December 22**

**35. The declination and right ascension of the sun becomes 23 ^{o}27′ N and 270^{o }respectively on**

**March 21**

**June 21**

**September 21**

**December 22 (Ans)**

**36. The sun’s declination remains north between**

**March 21 to June 21**

**June 21 to September 21**

**September 21 to December 21**

**December 21 to March 21**

**both (a) and (b) of above (Ans)**

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

**meridian (Ans)**

**vertical circle**

**prime vertical**

**none of these**

**38. The prime vertical passes through**

**the east point of the horizon**

**the west point of the horizon**

**the zenith point of the obsever**

**the nadir point of horizon**

**all the above (Ans)**

**39. The latitude of the observer’s position, is**

**elevation of the elevated pole**

**declination of the observer’s zenith**

**angular distance along the observer’s meridian between equator and the observer**

**north or south according as the observer is north of equator or south of equator**

**all the above (Ans)**

**40. The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above**

**equator**

**horizon (Ans)**

**pole**

**none of these**

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

**declination (Ans)****altitude****zenith distance****co-latitude**

**42. The angle between the observer’s meridian and declination circle of a heavenly body, is known as**

**hour angle (Ans)**

**right ascension**

**declination**

**azimuth**

**43. Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer’s meridian measured from the pole, is**

**co-declination (Ans)**

**co-altitude**

**co-latitude**

**polar distance**

**none of these**

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

**westward from the first point of Libra**

**eastward from the first point of Aeries (Ans)**

**westward from the first point of Aeries**

**eastward from the first point of Libra**

**45. Latitude of the observer’s position is equal to altitude of**

**north pole**

**pole star**

**celestial pole (Ans)**

**all the above**

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

**its altitude and azimuth**

**its declination and hour angle**

**its declination and right ascension**

**all the above (Ans)**

**47. The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is**

**altitude and azimuth system**

**declination and hour angle system**

**declination and right ascension system (Ans)**

**declination and altitude system**

**azimuth and declination system**

**48. Circumpolar stars**

**rotate round the north pole**

**rotate round the celestial pole**

**remain always above the horizon (Ans)**

**are seldom seen near the pole star**

**none of these**

**49. For any star to be a circumpolar star, its**

**declination must be 0 ^{o}**

**declination must be 90 ^{o}**

**distance from the poe must be less than the latitude of the observer (Ans)**

**hour angle must be 180 ^{o}**

**50. The altitude of a circumpolar star is maximum when it is**

**at east elongation**

**at upper culmination (Ans)**

**at west elongation**

**at lower culmination**

**51. 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**

**δ – θ (Ans)**

**θ – δ**

**θ + δ**

**θ + δ/2**

**52. A star may culminate at zenith if its declination is**

**greater than the longitude of the place**

**less than the latitude of the place**

**equal to the latitude of the place (Ans)**

**none of these**

**53. If a star whose declination is 60 ^{o} N culminates at zenith, its altitude at the lower culmination, is**

**10 ^{o}**

**20 ^{o}**

**30 ^{o }(Ans)**

**40 ^{o}**

**60 ^{o}**

**54. the altitudes of a circumpolar star at culminations are 70 ^{o }and 10^{o }, both culminations being north of zenith. The latitude of the place,is**

**80 ^{o}**

**70 ^{o}**

**60 ^{o}**

**50 ^{o}**

**40 ^{o }(Ans)**

**55. In Q.NO.54, declination of the star, is**

**80 ^{o}**

**70 ^{o}**

**60 ^{o }(Ans)**

**50 ^{o}**

**40 ^{o}**

**56. The polaris remains below horizon at**

**10 ^{o} N**

**50 ^{o} N latitude**

**equator**

**5 ^{o} S latitude (Ans)**

**57. The sidereal day is the time interval between two successive upper transits of**

**mean sun**

**first point of Aries (Ans)**

**first point of Libra**

**the polar star**

**moon**

**58. Pick up the correct statement from the following:**

**sidereal time at any instant is equal to the hour angle of the first point of Aries**

**local sidereal time of any place is equal to the right ascension of its meridian**

**sidereal time is equal to the right ascension of a star at its upper transit**

**all the above (Ans)**

**59. Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year**

**once**

**twice**

**thrice**

**four times (Ans)**

**five times**

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

**April 15**

**June 14**

**September 1**

**December 25**

**all the above (Ans) **

**61. The difference in longitude of two places expressed in time is equal to the difference in their**

**sidereal time**

**apparent solar time**

**mean solar time**

**all the above (Ans)**

**62. Pick up the incorrect statement from the following:**

**apparent solar time is measured from the lower transit of the true sun**

**mean solar time is measured from the lower transit of the mean sun**

**sidereal time is measured from the upper transit of the first point of Aries (Ans)**

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

**mean sun**

**true sun**

**vernal equinox**

**star**

**all the above (Ans)**

**64. With standard meridian as 82 ^{o}30′ E the standard time at longitude 90^{o} E is 8 h 30 m. The local mean time at the place will be**

**7 h 00 m**

**7 h 30 m**

**8 h 00 m**

**8 h 30 m**

**9 h 00 m (Ans)**

**65. G.M.T. Corresponding to given mean time, equals**

**L.M.T. – East longitude in time (Ans)**

**L.M.T. + East longitude in time**

**L.M.T. – West longitude in time**

**none of these**

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

**365**

**365.2224**

**365.2422**

**366.2422 (Ans)**

**366.2224**

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

**one less than mean solar days**

**one more than mean solar days (Ans)**

**equal to mean solar days**

**none of these **

**68. At eastern elongation, the pole star moves**

**eastward**

**westward**

**northward (Ans)**

**southward**

**69. At western elongation, the pole star moves**

**eastward**

**westward**

**northward**

**southward (Ans)**

**70. At upper culmination, the pole star moves**

**eastward**

**westward (Ans)**

**northward**

**southward**

**71. At lower culmination, the pole star moves**

**eastward (Ans)**

**westward**

**northward**

**southward **

**72. If a is the observed altitude, the refraction correction in seconds, is**

**58” cot a (Ans)**

**58” tan a**

**58” sin a**

**58” cos a**

** 73. Pick up the correct statement from the following:**

**refraction correction is zero when the celestial body is in the zenith**

**refraction correction is 33′ when the celestial body is on the horizon**

**refraction correction of celestial bodies depends upon their altitudes**

**all the above (Ans)**

**74. The correction for parallax, is**

**– 8”.8 cos a**

**+ .8” sin a**

**+ 8” .8 cos a (Ans)**

**– 8” .8 cos a**

**75. Pick up the correct statement from the following:**

**correction for refraction is always negative**

**correction for parallax is always positive**

**correction for semi-diameter is always negative (Ans)**

**correction for dip is always negative**

**none of these**

**76. Pick up the correct statement from the following:**

**ursa minor’s remains always north of pole star**

**polar star remains always north of polaris**

**polaris remains always north of ursa minor’s**

**ursa minor’s pole star and polaris are the names of the same star (Ans)**

**77. The polaris describes a small circle round the pole whose radius is approximately**

**1 ^{o }(Ans)**

**2 ^{o}**

**3 ^{o}**

**4 ^{o}**

**78. If the altitudes of a star at its upper and lower transits are 60 ^{o}30′ and 19^{o}30′ respectively, the latitude of the place, is**

**30 ^{o}**

**35 ^{o}**

**40 ^{o }(Ans)**

**45 ^{o} **

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

**horizon and equator**

**equator and zenith**

**zenith and pole**

**pole and horizon (Ans)**

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

**horizon and equator (Ans)**

**equator and zenith**

**zenith and pole**

**pole and horizon**

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

**at culmination (Ans)**

**at elongation**

**neither at cilmination nor at elongation**

**either at cilmination or at elongation**

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

**at culmination**

**at elongation (Ans)**

**neither at cilmination nor at elongation**

**either at cilmination or at elongation**

**83. Pick up the incorrect statement from the following. High oblique photographs**

**may have tilt up to 30 ^{o}**

**may include the image of the horizon**

**may not include the image of the horizon**

**none of these (Ans)**

**84. Pick up the incorrect statement from the following**

**Aerial photographs may be either vertical or oblique**

**vertical photographs are taken with the axis of camera pointing vertically downward**

**vertical photographs are used for most accurate maps**

**on oblique photographs, scale variation is larger as compared to that of vertical photographs**

**all the above (Ans)**

**85. The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as**

**ground principle point**

**ground plumb point (Ans)**

**iso-centre**

**perspective centre**

**86. The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as**

**isocentre**

**principle point (Ans)**

**perspective centre**

**plumb line**

**87. 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**

**isocentre (Ans)**

**principle point**

**perspective centre**

**plumb point**

**88. Homologous point is**

**ground isocentre**

**photo principle point**

**ground principle point**

**all the above (Ans)**

**89. 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 principle point will be**

**f sin θ**

**f cos θ**

**f tan θ (Ans)**

**f sec θ**

**90. The ratio of distances of the plumb point and isocentre from the principle point of a vertical photograph, is**

**1**

**2 (Ans)**

**3**

**1/2**

**1/2**

**91. From the principle point the horizon point lies on the principal line at a distance of**

**f sin θ**

**f cos θ**

**f tan θ (Ans)**

**f cot θ**

**92. The product of the distances of plumb point and horizon point of a vertical photograph from its principal point, is**

**f ^{2 }(Ans)**

**2f ^{2}**

**3f ^{2}**

**1/2f ^{2}**

**1/3f ^{2}**

**93. the height displacement on a vertical photograph**

**increases as the horizontal distance increases from the principal point**

**increases as the ground elevation increases**

**decreases as the flying height increases**

**all the above (Ans)**

**94. On vertical photographs, height displacement is**

**positive for points above datum**

**negative for points below datum**

**zero for points vertically below the air station**

**all the above (Ans)**

**95. 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**

**2 mm**

**4 mm**

**6 mm**

**8 mm**

**10 mm (Ans)**

**96. The relation between the air base(B), photographic base(b), flying height (H) and the focal length(f) of a vertical photograph, is**

**B = bH/f (Ans)**

**B = f/bH**

**B = b/fH**

**B = H/bf**

**97. The normal longitudinal overlap is generally kept**

**50 %**

**60 % (Ans)**

**70 %**

**75 %**

**98. The net ground area of a vertical photograph 20cm * 20cm on scale 1 : 10000 having overlaps 60 % and 30 %, is**

**0.50 sq km**

**0.56 sq km**

**0.60 sq km**

**0.64 sq km (Ans)**

**99. If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1:50000, will be**

**1 cm**

**2 cm**

**3 cm**

**4 cm (Ans)**

**5 cm**

**100. The maximum error in radial line assumption, is**

**(h/H)f tan θ (Ans)**

**(h/H)f ^{2} tan θ**

**(h/H)f ^{2} sin θ**

**(h/H)f cos θ**

**101. 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 upto**

**1 ^{o}**

**2 ^{o}**

**3 ^{o} (Ans)**

**4 ^{o}**

**102. In a truely vertical photograph**

**principal point coincides the isocentre**

**iso-centre coincides the plumb point**

**plumb point coincides the principal point**

**principal point, iso-centre and plumb point coincide**

**all the above (Ans)**

**103. Pick up the incorrect statement from the following :**

**in truely vertical photographs without relief angles are true at the plumb point**

**in tilted photographs without relief, angles are true at the iso-centre**

**in tilted photographs with relief, angles are true at the principal point (Ans)**

**none of these**

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

**base line of the left photograph of stereopair**

**base line of the right photograph of stereopair**

**sum of the base line of stereo pair**

**mean of the base lines of the stereo pair (Ans)**

**105. The slotted template method**

**is prepared, by graphical method**

**is suitable for large areas with less control**

**is rapid and accurate**

**may be done on any scale**

**all the above (Ans)**

**106. Parallax bar measures**

**parallax**

**height**

**parallax difference (Ans)**

**height difference**

**107. 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**

**8000 m**

**10000 m**

**12000 (Ans)**

**14000 m**

**108. The stereo plotting instruments are generally manufactured on the principle of**

**optical projection**

**optical mechanism projection**

**mechanical projection**

**all the above (Ans)**

**109. α and β are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being S and f respectively. Parallax displacement of the point due to relief, is**

**h tan α/S**

**h tan β/S**

**h(tan α + tan β)/S (Ans)**

**h(tan α – tan β)/S**

**110. 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**

**4.4 mm**

**5.5 mm**

**6.5 mm**

**7.5 mm (Ans)**

**10 mm**

**111. Rotation of the camera at exposure about its vertical axis, is known as**

**swing (Ans)**

**tilt**

**tip**

**none of these**

**112. Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as**

**swing**

**tilt**

**tip (Ans)**

**none of these**

**113. Rotation of the camera at exposure about the line of flight, is known as**

**swing**

**tilt (Ans)**

**tip**

**none of these**

**114. The rate of change of parallax dp/dh with respect to change in h, may be expressed as**

**fB(H-h)**

**fB(H-h) ^{2} (Ans)**

**fB(H+h)**

**fB(H+h) ^{2}**

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

**focal length of the camera**

**overall size of the photo graphs**

**percentage of overlap**

**all the above (Ans)**

**116. The parallax equation Δp = (BmΔh/H-h) is applicable to entire overlap of the photographs only if parallax is measured**

**normal to base line**

**parallel to base line (Ans)**

**both (a) and(b)**

**neither (a) nor (b)**

**117. Assuming human normal vision distance 25 cm, smallest measurable angle 20”, and introcular distance 6.5 cm, the smallest depth to be discerned is**

**0.1 mm (Ans)**

**0.5 mm**

**1.00 mm**

**1.1 mm**

**118. To obtained photographs of an area of 1000 m average elevation, on scale 1:30000, with a camera of 30 cm focal length, the flying height is**

**4000 m**

**5000 m**

**6000 m(Ans)**

**7000 m**

**119. Homologous points are**

**opposite corners of a photograph**

**nodal points of the camera lens**

**corresponding points on the ground and photograph (Ans)**

**plumb points of stereo pair of photographs**

**120. The following points form a pair of homologous points:**

**photo principal point and ground principal point**

**photo isocentre and ground isocentre**

**photo plumb point and ground plumb point**

**all the above (Ans)**

**121. A plate parallel is the line on the plane of the negative**

**parallel to the principal line**

**perpendicular to the principal line (Ans)**

**along the bisector of the angle between the principal line and a perpendicular line through principal plane**

**none of these**

**122. For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through**

**isocentre (Ans)**

**plumb point**

**principal point**

**none of these**

**123. If v,t and f/H 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**

**i = v.t.H/f**

**i = v.f/t.H (Ans)**

**i = v.t (f/H)**

**i = tH/v.f**

**124. the parallax of a point on the photograph is due to**

**ground elevation**

**flying height**

**length of air base**

**focal length of the camera**

**all the above (Ans)**

**125. The want of correspondence in stereo photographs**

**is a good property**

**is a function of tilt (Ans)**

**is not affected by the change of flying height between photographs**

**is minimum when θ is 3 ^{o}**

**126. 23cm * 23cm 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**

**1 m (Ans)**

**2 m**

**3 m**

**4 m**

**5 m**

**127. The rotation of aircraft about the line of flight, is designated by the letter**

**ω, and is simetimes called ‘roll’ (Ans)**

**φ, and is simetimes called ‘pitch’**

**χ, and is simetimes called ‘swing’**

**none of these**

**128. The rotation of aircraft about Z-axis, is designated by the letter**

**ω, and is simetimes called ‘roll’**

**φ, and is simetimes called ‘pitch’**

**χ, and is simetimes called ‘swing’ (Ans)**

**none of these**

**129. The rotation of aircraft about Y-axis, is designated by the letter**

**ω, and is simetimes called ‘roll’**

**φ, and is simetimes called ‘pitch’ (Ans)**

**χ, and is simetimes called ‘swing’**

**none of these**

**130. If the distance between the projectors is altered by a movement along X-axis of one projector,**

**the length of the air base is increased**

**the scale of the model is altered**

**y-parallax is not affected**

**relative orientation is not affected**

**all the above (Ans)**

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

**position 1**

**position 2**

**position 4**

**position 6**

**position 4 and 6 (Ans)**

**132. By applying clockwise swing to right projector, maximum y-parallax is introduced in the model at**

**position 1 (Ans)**

**position 2**

**position 4**

**position 6**

**133. The movement of the projector in y-direction, introduces i the model a y-parallax**

**maximum at position 1**

**maximum at position 2**

**maximum at position 5 and 6**

**maximum at position 3 and 4**

**equally throughout the model (Ans)**

**134. The method of surveying by triangulation was first introduced by the Dutchman Snell in**

**1600**

**1615 (Ans)**

**1630**

**1650**

**1680**

**135. In triangulation surveys**

**the area is divided into triangular figures**

**control stations are located from which detailed surveys are carried out**

**sides are not measured excepting the baseline**

**angular measurements are only resorted to**

**all the above (Ans)**

**136. Triangulation surveys**

**planimetric control**

**height control**

**both planimetric and height control (Ans)**

**none of these**

**137. Triangulation surveys are carried out for locating**

**control points for surveys of large areas**

**control points for photogrammetric surveys**

**engineering works, i.e. Terminal poibts of long tunnels, bridge abutments, etc.**

**All the above (Ans)**

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

**24 %**

**36 % (Ans)**

**40 %**

**60 %**

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

**1 in 12 (Ans)**

**1 in 10**

**1 in 8**

**1 in 6**

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

**tension = (P – P _{S})L/AE**

**sag = (L ^{3}w^{2}/24P^{2}) where w is the weight of tape/m**

**slope = (h ^{2}/2L + h^{4}/8L^{3} ) where h is height difference of end supports**

**reduction to mean sea level = Lh/R**

**all the above (Ans)**

**141. The negative sign is assigned to**

**reduction to mean sea level**

**correction for horizontal alignment**

**correction for slope**

**correction for slope**

**all the above (Ans)**

**142. The station where observations are not made, but the angles at the station are used in triangulation series, is known as**

**satellite station**

**subsidiary station**

**pivot station (Ans)**

**main station**

**143. The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as**

**satellite station**

**eccentric station**

**false station**

**pivot station (Ans)**

**144. Systematic errors**

**always follow some definite mathematical law**

**can be removed by applying corrections to the observed values**

**either make the result too great or too small**

**are also known as cumulative errors**

**all the above (Ans)**

**145. accidental errors**

**do not follow any definite mathemetical law**

**cannot be removed by applying corrections to the observed values**

**are generally small**

**are also known as compensating errors**

**all the above (Ans)**

**146. The equation which is obtained by multiplying each equation by the coefficient of its unknowns and by adding the equations thus formed, is known as**

**observation equation**

**conditional equation**

**normal equation (Ans)**

**none of these**

**147. 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**

**gauss’ mid latitude formula**

**delamber’s method**

**legendr’s method**

**least square method (Ans)**

**148. The moon rotates round the earth once in every**

**29 days**

**29.35 days (Ans)**

**29.53 days**

**30 days**

**149. The time interval between successive transits of the moon, is**

**24 hours 10 minutes**

**20 hours 25 minutes**

**24 hours 50 minutes (Ans)**

**23 hours 50 minutes**

**23 hours 25 minutes**

** 150. The solar tidal force divided by lunar tidal force is**

**1/3**

**1/2 (Ans)**

**3/4**

**5/4**

**151. Spring tides are caused when**

**sun and moon are in line with earth**

**solar tidal force acts opposite to lunar tidal force**

**solar tidal force and lunar tidal force both coincide (Ans)**

**none of these**

**152. the station pointer is generally used in**

**triangulation surveying**

**astronomical surveying**

**hydrographical surveying (Ans)**

**photogrammetric surveying**

**153. An aerial photograph may be assumed as**

**parallel projection**

**orthogonal projection**

**central projection (Ans)**

**none of these**

**154. perspective centre relates to**

**parallel projection**

**orthogonal projection**

**central projection (Ans)**

**none of these**

**155. The point where vertical line passing through the perspective centre intersects the plane of the photograph, is known as**

**photo plumb point (Ans)**

**plumb point**

**nadir point**

**isocentre**

**none of these**

**156. The orthogonal projection of the perspective centre on a tilted photograph, is called**

**nadir**

**isocentre**

**principal point (Ans)**

**plumb point**

**157. The distance between the projection centre and the photograph, is called**

**principal distance (Ans)**

**principal line**

**isocentre distance**

**focal length**

**158. The principal line is the line joining the principal point and**

**nadir**

**isocentre (Ans)**

**perspective centre**

**none of these**

**159. The principal plane contains**

**nadir point**

**isocentre**

**principal point**

**principal axis and principal line**

**all the above (Ans)**

**160. To have greatest coverage of the area, the type of photography used, is**

**high oblique (Ans)**

**low oblique**

**vertical**

**none of these**

**161. The coverage is least if photography is**

**high oblique**

**low oblique**

**vertical (Ans)**

**none of these**

**162. H is the flying height above mean ground level and f is the principal distance of a vertical photograph. The mean scale of the photographs is**

**H.f (Ans)**

**H/f**

**f/H**

**H + f**

**none of these**

**163. The scale of the photography taken from a height of 300 m, with a camera of focal length 15cm, is**

**1:10000**

**1:15000**

**1:20000 (Ans)**

**1:30000**

**164. The flying height of the camera is 1000 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**

**52 m**

**62 m**

**72 m (Ans)**

**82 m**

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

**500 m**

**1000 m (Ans)**

**1500 m**

**2000 m**

**166. The average eye base is assumed as**

**58 mm**

**60 mm**

**62 mm**

**64 mm**

**72 mm (Ans)**

**167. In field astronomy, the quantities observed are entirely**

**lengths**

**angles (Ans)**

**heights**

**all of these**

**168. The main object of the astronomer to obtain**

**astronomical latitude**

**astronomical longitude**

**astronomical bearing**

**all of these (Ans)**

**169. The nautical mile is the length of**

**1 minute of latitude**

**1 minute of longitude (Ans)**

**1 degree of latitude**

**1 degree of longitude**

**170. If two points differing by 1 ^{o} of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about**

**10 km**

**25 km**

**30 km (Ans)**

**50 km**

**171. Stellar astronomy deals with**

**plane surveying**

**geodetic surveying**

**star observations (Ans)**

**planet observations**

**172. The nearest star is so far away from the earth that the directions to it from two diametrically opposites points on the earth deffers less than**

**0.01 second**

**0.001 second**

**0.0001 second (Ans)**

**none of these**

**173. A star in northern sphere is said to transit**

**when its altitude is maximum**

**when its azimuth is 180 ^{o}**

**when it is in south**

**all the above (Ans)**

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

**astronomical latitude**

**astronomical co-latitude (Ans)**

**co-declination of star**

**declination of star**

**175. The angle between the direction of star and the direction of earth’s axis of rotation is called**

**co-declination (Ans)**

**co-latitude**

**declination**

**latitude**

**176. When a star transits at the zenith**

**the astronomical triangle becomes of the largest area**

**the astronomical triangle reduces to an arc joining the pole and the zenith**

**the angle of elevation of the star is 90 ^{o}**

**all the above (Ans)**

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