Surveying MCQ

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• The prismatic compass and surveyor’s compass
  ক

  give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

  খ

  both give QB of a line and WCB of a line

  গ

  both give QB of a line

  ঘ

  both give WCB of a line
• If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will
  ক

  increase

  খ

  decrease

  গ

  not change

  ঘ

  either ‘A’ or ‘B’
• The sidereal day is the time interval between two successive upper transits of
  ক

  Mean sun

  খ

  First point of Aries

  গ

  First point of Libra

  ঘ

  The polar star
• For any star to be a circumpolar star, its
  ক

  Declination must be 0°

  খ

  Declination must be 90°

  গ

  Distance from the pole must be less than the latitude of the observer

  ঘ

  Hour angle must be 180°
• The adjustment of horizontal cross hair is required particularly when the instrument is used for
  ক

  leveling

  খ

  prolonging a straight line

  গ

  measurement of horizontal angles

  ঘ

  all of the above
• Bowditch rule is applied to
  ক

  an open traverse for graphical adjustment

  খ

  a closed traverse for adjustment of closing error

  গ

  determine the effect of local attraction

  ঘ

  none of the above
• A star may culminate at zenith if its declination is
  ক

  Greater than the longitude of the place

  খ

  Less than the latitude of the place

  গ

  Equal to the latitude of the place

  ঘ

  None of these
• Horizontal distances obtained by thermometric observations
  ক

  require slope correction

  খ

  require tension correction

  গ

  require slope and tension corrections

  ঘ

  do not require slope and tension corrections
• Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?
  ক

  Measuring angle and distance from one transit station

  খ

  Measuring angles to the point from at least two stations

  গ

  Measuring angle at one station and distance from other

  ঘ

  Measuring distance from two points on traverse line
• To have greatest coverage of the area, the type of photography used, is
  ক

  High oblique

  খ

  Low oblique

  গ

  Vertical

  ঘ

  None of these
• The parallax of a point on the photograph is due to
  ক

  Ground elevation

  খ

  Flying height

  গ

  Length of air base

  ঘ

  All the above
• Polaris is usually observed for the determination of the latitude when it is
  ক

  At culmination

  খ

  At elongation

  গ

  Neither at culmination nor at elongation

  ঘ

  Either at culmination or at elongation
• In a truly vertical photograph,
  ক

  Principal point coincides the isocenter

  খ

  Iso-centre coincides the plumb point

  গ

  Plumb point coincides the principal point

  ঘ

  All the above
• The want of correspondence in stereo-photographs
  ক

  Is a good property

  খ

  Is a function of tilt

  গ

  Is not affected by the change of flying height between photographs

  ঘ

  Is minimum when θ is 3°
• The position of a heavenly body on the celestial sphere can be completely specified by
  ক

  Its altitude and azimuth

  খ

  Its declination and hour angle

  গ

  Its declination and right ascension

  ঘ

  All the above
• If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated
  ক

  on its outer spindle with a relative motion between the vernier and graduated scale of lower plate

  খ

  on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate

  গ

  on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

  ঘ

  on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
• The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called
  ক

  radiation

  খ

  intersection

  গ

  resection

  ঘ

  traversing
• The First Point of Aeries
  ক

  Is the point in the celestial sphere where zero meridian crosses the celestial equator

  খ

  Is usually denoted by the Greek letter $$\gamma $$

  গ

  Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda

  ঘ

  All the above
• On vertical photographs, height displacement is
  ক

  Positive for points above datum

  খ

  Negative for points below datum

  গ

  Zero for points vertically below the air station

  ঘ

  All the above
• In a spherical triangle ABC, right angled at C, sin b equals
  ক

  sin a cos A

  খ

  cos a sin A

  গ

  tan a cot A

  ঘ

  cot A tan a
• Systematic errors
  ক

  Always follow some definite mathematical law

  খ

  Can be removed by applying corrections to the observed values

  গ

  Are also known as cumulative errors

  ঘ

  All the above
• Theodolite is an instrument used for
  ক

  tightening the capstan-headed nuts of level tube

  খ

  measurement of horizontal angles only

  গ

  measurement of vertical angles only

  ঘ

  measurement of both horizontal and vertical angles
• Cross staff is an instrument used for
  ক

  measuring approximate horizontal angles

  খ

  setting out right angles

  গ

  measuring bearings of the lines

  ঘ

  none of the above
• Subtense bar is an instrument used for
  ক

  levelling

  খ

  measurement of horizontal distances in plane areas

  গ

  measurement of horizontal distances in undulated areas

  ঘ

  measurement of angles
• The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be
  ক

  equidistant from A and B

  খ

  closer to the higher station

  গ

  closer to the lower station

  ঘ

  as far as possible from the line AB
• The type of surveying which requires least office work is
  ক

  tacheomefry

  খ

  trigonometrical levelling

  গ

  plane table surveying

  ঘ

  theodolite surveying
• The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called
  ক

  Visible horizon

  খ

  Sensible horizon

  গ

  Celestial horizon

  ঘ

  True horizon
• The point on the celestial sphere vertically below the observer's position, is called
  ক

  Zenith

  খ

  Celestial point

  গ

  Nadir

  ঘ

  Pole
• In a tropical year, the numbers of sidereal days are
  ক

  365

  খ

  365.2224

  গ

  365.2422

  ঘ

  366.2422
• Sidereal day
  ক

  Is the period of time taken by the earth in making a complete rotation with reference to stars

  খ

  Is slightly shorter than an ordinary solar day

  গ

  Is divided into the conventional hours, minutes and seconds

  ঘ

  All the above