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Quiz 1
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Q.1
Pick up the correct statement from the following:
The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
The difference between the absolute parallax of two points depends upon the difference in their elevations
The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
All the above
Q.2
The position of the sun when its north declination is maximum is known as
Vernal equinox
Autumnal equinox
Summer solstice
Winter solstice
Q.3
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
fB/(H + h)
fB/(H + h)²
Q.4
Polaris is usually observed for the determination of the azimuth when it is
At culmination
At elongation
Neither at culmination nor at elongation
Either at culmination or at elongation
Q.5
The great circle which passes through the zenith, nadir and the poles, is known as
Meridian
Vertical circle
Prime vertical
None of these
Q.6
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
Q.7
Pick up the correct statement from the following:
The angle between the plane of the negative and the horizontal plane containing perspective axis is the tilt of the photograph
The direction of maximum tilt is defined by the photo principal line
The principal plane is truly vertical plane which contains perspective centre as well as principal point and plumb point
All the above
Q.8
Which of the following statements is incorrect ?
Error due to refraction may not be completely eliminated by reciprocal levelling.
Tilting levels are commonly used for precision work.
The last reading of levelling is always a foresight.
All of the above statements are incorrect.
Q.9
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
Q.10
If the length of a chain is found to be short on testing, it can be adjusted by
straightening the links
removing one or more small circular rings
closing the joints of the rings if opened out
all of the above
Q.11
In the double application of principle of reversion, the apparent error is
equal to true error
half the true error
two times the true error
four times the true error
Q.12
For any star to be a circumpolar star, its
Declination must be 0°
Declination must be 90°
Distance from the pole must be less than the latitude of the observer
Hour angle must be 180°
Q.13
The following points form a pair of homologous points:
Photo principal point and ground principal point
Photo isocenter and ground isocenter
Photo plumb point and ground plumb point
All the above
Q.14
The necessary geometrical condition for triangulation adjustment is:
The sum of the angles around a station should be 360°
The sum of the three angles of a plane triangle should be 180°
The sum of the eight angles of a braced quadrilateral should be 360°
All the above
Q.15
Bowditch rule is applied to
an open traverse for graphical adjustment
a closed traverse for adjustment of closing error
determine the effect of local attraction
none of the above
Q.16
The adjustment of horizontal cross hair is required particularly when the instrument is used for
leveling
prolonging a straight line
measurement of horizontal angles
all of the above
Q.17
Pick up the correct statement from the following:
The horizontal direction of the pole is called astronomical north
The angle between the direction of true north and the direction of a survey line is called astronomical bearing
The astronomical bearing is generally called azimuth
All the above
Q.18
The solar tidal force divided by lunar tidal force is
1/3
1/2
3/4
5/4
Q.19
Closed contours, with higher value inwards, represent a
depression
hillock
plain surface
none of the above
Q.20
The average eye base is assumed as
58 mm
60 mm
62 mm
64 mm
Q.21
The sidereal day is the time interval between two successive upper transits of
Mean sun
First point of Aries
First point of Libra
The polar star
Q.22
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
increase
decrease
not change
either ‘A’ or ‘B’
Q.23
The prismatic compass and surveyor’s compass
give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
both give QB of a line and WCB of a line
both give QB of a line
both give WCB of a line
Q.24
The prime vertical passes through
The east point of the horizon
The west point of the horizon
The zenith point of the observer
All the above
Q.25
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
B =f/bH
B = b/fH
B = H/bf
Q.26
If α is the observed altitude, the refraction correction in seconds, is
58" cot α
58" tan α
58 sin α
58 cos α
Q.27
The elevation of the star at elongation is obtained by
sin α = sin φ cosec δ
sin α = sin φ sec δ
sin α = cos φ sec δ
sin α = cos φ cosec δ
Q.28
For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are
Two angle equations and two side equations
One angle equation and three side equations
Three angle equations and one side equation
None of these
Q.29
Pick up the incorrect statement from the following:
Correction for refraction is always negative
Correction for parallax is always positive
Correction for semi-diameter is always negative
Correction for dip is always negative
Q.30
The relief displacement of a building 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
500 m
1000 m
1500 m
2000 m
Q.31
If the true bearing of a line AB is 269° 30′, then the azimuth of the line AB is
Q.32
The principal plane contains
Nadir point
Iso-centre
Principal point
All the above
Q.33
Latitude of the observer's position is equal to altitude of
North pole
Pole star
Celestial pole
All the above
Q.34
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
Both (A) and (B)
Neither (A) nor (B)
Q.35
An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as
contour line
horizontal equivalent
contour interval
contour gradient
Q.36
The angle of intersection of the two plane mirrors of an optical square is
30°
45°
60°
90°
Q.37
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
D'Alembert's method
Legendre's method
Least square method
Q.38
Contour interval is
Inversely proportional to the scale of the map
Directly proportional to the flatness of ground
Larger for accurate works
Larger if the time available is more
Q.39
Assuming human normal vision distance 25 cm, smallest measurable angle 20", and intraocular distance 6.5 cm, the smallest depth to be discerned is
0.1 mm
0.5 mm
1.00 mm
1.1 mm
Q.40
The orthogonal projection of the perspective centre on a tilted photograph, is called
Nadir
Isocenter
Principal point
Plumb point
Q.41
The distance between the projection centre and the photograph, is called
Principal distance
Principal line
Isocentric distance
Focal length
Q.42
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
All the above
Q.43
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
All the above
Q.44
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
Q.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
δ - θ
θ - δ
θ + δ
½ (θ - δ)
Q.46
There are two stations A and B. Which of the following statements is correct?
The fore bearing of AB is AB
The back bearing of AB is BA
The fore and back bearings of AB differ by 180°
All the above
Q.47
Homologous point is
Photo principal point
Ground principal point
Ground isocenter
All the above
Q.48
Intersection method of detailed plotting is most suitable for
forests
urban areas
hilly areas
plains
Q.49
Which of the following methods of offsets involves less measurement on the ground?
method of perpendicular offsets
method of oblique offsets
method of ties
all involve equal measurement on the ground
Q.50
The difference between a level line and a horizontal line is that
level line is a curved line while hori-zontal line is a straight line
level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
horizontal line is normal to plumb line while level line may not be normal to the plumb line
both are same
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