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Quiz 6
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Q.1
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
0.01 second
0.001 second
0.0001 second
None of these
Q.2
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
Principal point
Isocenter
Plumb point
Perspective centre
Q.3
The two point problem and three point problem are methods of
resection
orientation
traversing
resection and orientation
Q.4
The instrument used for accurate centering in plane table survey is
spirit level
alidade
plumbing fork
trough compass
Q.5
The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called
Equator
Celestial equator
Ecliptic
None of these
Q.6
The methods used for locating the plane table stations are
i) radiation
ii) traversing
iii) intersection
iv) resection
The correct answer is
(i) and (ii)
(iii) and (iv)
(ii) and (iv)
(i) and (iii)
Q.7
At upper culmination, the pole star moves
Eastward
Westward
Northward
Southward
Q.8
At western elongation, the pole star moves
Eastward
Westward
Northward
Southward
Q.9
At lower culmination, the pole star moves
Eastward
Westward
Northward
Southward
Q.10
Size of a theodolite is specified by
the length of telescope
the diameter of vertical circle
the diameter of lower plate
the diameter of upper plate
Q.11
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be
+50 m, +86.6 m
+86.6 m, -50 m
+50 m, -86.6 m
+70.7 m, -50 m
Q.12
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
Westward from the first point of Aeries
Eastward from the first point of Libra
Q.13
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
h (tan α - tan β)/S
Q.14
The method of surveying by triangulation was first introduced by the Dutchman Snell in
1600
1615
1630
1650
Q.15
Height of instrument method of levelling is
more accurate than rise and fall method
less accurate than rise and fall method
quicker and less tedious for large number of intermediate sights
none of the above
Q.16
The slotted template method
Is prepared, by graphical method
Is suitable for large areas with less control
Is rapid and accurate
All the above
Q.17
When a star is between the pole and the horizon, the relationship between latitude (λ), zenith distance (z) and declination δ, is
θ = z + δ
θ = δ - z
θ = 180° - (z + δ)
θ = (z + δ) - 180°
Q.18
Which of the following angles can be set out with the help of French cross staff?
45° only
90° only
either 45° or 90°
any angle
Q.19
The rise and fall method of levelling provides a complete check on
backsight
intermediate sight
foresight
all of the above
Q.20
Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
24 %
36 %
40 %
60 %
Q.21
Pick up the correct statement from the following:
The star's movement is apparent due to the actual steady rotation of the earth about its axis
The stars move round in circular concentrated parts
The centre of the circular paths of stars is the celestial pole
All the above
Q.22
Pick up the correct statement from the following:
The sun's right ascension increases for 0 h to 24 h when it returns to the First point of Aries
The minimum declination of the sun is zero' on 22nd September
All the above
Q.23
The angle between the observer's meridian and declination circle of a heavenly body, is known as
Hour angle
Azimuth
Right ascension
Declination
Q.24
A metallic tape is made of
steel
invar
linen
cloth and wires
Q.25
If S is the sum of three angles of a spherical triangle, the spherical excess equals
S - 90°
S - 180°
S - 270°
S - 360°
Q.26
A lemniscate curve between the tangents will be transitional throughout if the polar deflection angle of its apex, is
Δ/2
Δ/3
Δ/4
Δ/6
Q.27
Longitudes are measured from 0° to
180° eastward
180° westward
180° east or westward
360° eastward
Q.28
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
sin H = tan φ . cot δ
cos H = tan φ . cot δ
tan H = tan φ . cot δ
None of these
Q.29
The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by
sin λ
cos λ
tan λ
cot λ
Q.30
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
All the above
Q.31
In direct method of contouring, the process of locating or identifying points lying on a contour is called
ranging
centring
horizontal control
vertical control
Q.32
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to
i) altitude bubble on index frame
ii) altitude bubble on index frame if it is to be used as a level
iii) altitude bubble on telescope
iv) altitude bubble on telescope if it is to be used as a level
The correct answer is
only (i)
both (i) and (iv)
only (iii)
both (ii) and (iii)
Q.33
The parallax of a point on the photograph is due to
Ground elevation
Flying height
Length of air base
All the above
Q.34
To have greatest coverage of the area, the type of photography used, is
High oblique
Low oblique
Vertical
None of these
Q.35
Which of the following errors cannot be eliminated by taking both face observations ?
error due to horizontal axis not being perpendicular to the vertical axis
index error i.e. error due to imperfect adjustment of the vertical circle vernier
error due to non-parallelism of the axis of telescope level and line of collimation
none of the above
Q.36
Which of the following errors can be eliminated by taking mean of bot face observations ?
error due to imperfect graduations
error due to eccentricity of verniers
error due to imperfect adjustment of plate levels
error due to line of collimation not being perpendicular to horizontal axis
Q.37
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
f/H
f/(H + h)
f/(H - h)
(H - h)/f
Q.38
The want of correspondence in stereo-photographs
Is a good property
Is a function of tilt
Is not affected by the change of flying height between photographs
Is minimum when θ is 3°
Q.39
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
10 km
25 km
30 km
50 km
Q.40
The suitable contour interval for a map with scale 1 : 10000 is
2 m
5 m
10 m
20 m
Q.41
Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ?
radiation
intersection
traversing
resection
Q.42
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
sin z = sec φ . cos δ
cos z = sec φ . cos δ
tan z = sec φ . cos δ
None of these
Q.43
The altitude of a circumpolar star is maximum when it is
At east elongation
At upper culmination
At west elongation
At lower culmination
Q.44
Rotation of the camera at exposure about its vertical axis, is known as
Swing
Tilt
Tip
None of these
Q.45
In the cross-section method of indirect contouring, the spacing of cross-sections depends upon
i) contour interval
ii) scale of plan
iii) characteristics of ground
The correct answer is
only (i)
(i) and (ii)
(ii) and (iii)
(i), (ii) and (iii)
Q.46
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?
Measuring angle and distance from one transit station
Measuring angles to the point from at least two stations
Measuring angle at one station and distance from other
Measuring distance from two points on traverse line
Q.47
Horizontal distances obtained by thermometric observations
require slope correction
require tension correction
require slope and tension corrections
do not require slope and tension corrections
Q.48
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
None of these
Q.49
Perspective centre relates to
Parallel projection
Orthogonal projection
Central projection
None of these
Q.50
Circumpolar stars
Rotate round the North Pole
Rotate round the celestial pole
Remain always above the horizon
Are seldom seen near the pole star
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