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Quiz 5
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Q.1
Select the correct statement.
A contour is not necessarily a closed curve.
A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.
Two contours of different elevations do not cross each other except in case of an overhanging cliff.
All of the above statements are correct.
Q.2
Select the correct statement.
Contour interval on any map is kept constant.
Direct method of contouring is cheap¬er than indirect method.
Inter-visibility of points on a contour map cannot be ascertained.
Slope of a hill cannot be determined with the help of contours.
Q.3
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
10 mm
Q.4
The process of turning the telescope about the vertical axis in horizontal plane is known as
transiting
reversing
plunging
swinging
Q.5
For mapping any country
Geodetic triangulation of greatest possible sides and accuracy is carried out
Primary triangles are broken down into secondary triangles of somewhat lesser accuracy
Secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys
All the above
Q.6
The angle between the prolongation of the preceding line and the forward line of a traverse is called
deflection angle
included angle
direct angle
none of the above
Q.7
To avoid large centering error with very short legs, observations are generally made
To chain pins
By using optical system for centering the theodolite
To a target fixed on theodolite tripod on which theodolite may be fitted easily
All the above
Q.8
For which of the following permanent adjustments of theodolite, the spire test is used ?
adjustment of plate levels
adjustment of line of sight
adjustment of horizontal axis
adjustment of altitude bubble and vertical index frame
Q.9
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
Main station
Q.10
The scale of a tilted photograph of focal length f taken from an altitude H, along the plate parallel through principal point is
f/H sec θ
f sec θ/H
f/H
f/H cos ½θ
Q.11
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
None of these
Q.12
For a line AB
the forebearing of AB and back bearing of AB differ by 180°
the forebearing of AB and back bearing of BA differ by 180°
both (A) and (B) are correct
none is correct
Q.13
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
Co-altitude
Co-latitude
Polar distance
Q.14
Detailed plotting is generally done by
radiation
traversing
resection
all of the above
Q.15
The angle between the direction of star and the direction of earth's axis of rotation is called
Co-declination
Co-latitude
Declination
Latitude
Q.16
For a well-conditioned triangle, no angle should be less than
20°
30°
45°
60°
Q.17
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
f sin θ
f cos θ
f tan θ
f sec θ
Q.18
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
Sum of the three angles less than six right angles and greater than two right angles
Sum of any two sides is greater than the third
Q.19
Select the incorrect statement.
The true meridians at different places are parallel to each other.
The true meridian at any place is not variable.
The true meridians converge to a point in northern and southern hemispheres.
The maps prepared by national survey departments of any country are based on true meridians.
Q.20
If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is
99.345 m
100.345 m
100.655 m
101.870 m
Q.21
Dumpy level is most suitable when
the instrument is to be shifted frequently
fly levelling is being done over long distance
many readings are to be taken from a single setting of the instrument
all of the above
Q.22
In the prismatic compass
the magnetic needle moves with the box
the line of the sight does not move with the box
the magnetic needle and graduated circle do not move with the box
the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction
Q.23
If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is
10°
20°
30°
40°
Q.24
The station pointer is generally used in
Triangulation surveying
Astronomical surveying
Hydrographical surveying
Photogrammetric surveying
Q.25
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?
error due to eccentricity of verniers
error due to displacement of station signals
error due to wrong adjustment of line of collimation and trunnion axis
error due to inaccurate graduation
Q.26
Pick up the correct statement from the following:
If the applied tension to the tape is more than the standard, the tension correction is positive
If the applied tension to the tape is less than the standard, the tension correction is negative
If the temperature during measurement is greater than the standard temperature, the temperature correction is positive
All the above
Q.27
Pick up the incorrect statement from the following:
In truly vertical photographs without relief angles are true at the plumb point
In tilted photographs without relief, angles are true at the iso-centre
In tilled photographs with relief, angles are true at the principal point
None of these
Q.28
The cross hairs in the surveying telescope are placed
midway between eye piece and objec-tive lens
much closer to the eye-piece than to the objective lens
much closer to the objective lens than to the eye piece
anywhere between eye-piece and objective lens
Q.29
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
Declination and altitude system
Q.30
The negative sign is assigned to
Reduction to mean sea level
Correction for horizontal alignment
Correction for slope
All the above
Q.31
The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is
f/H sec θ
f sec θ/H
f/H
f/H cos ½θ
Q.32
The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above
Equator
Horizon
Pole
None of these
Q.33
Check lines (or proof lines) in Chain Surveying, are essentially required
To plot the chain lines
To plot the offsets
To indicate the accuracy of the survey work
To increase the out-turn
Q.34
A negative declination shows that the magnetic meridian is to the
eastern side of the true meridian
western side of the true meridian
southern side of the true meridian
none of the above
Q.35
The graduations in prismatic compass
i) are inverted
ii) are upright
iii) run clockwise having 0° at south
iv) run clockwise having 0° at north
The correct answer is
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
Q.36
The correction for sag is
always additive
always subtractive
always zero
sometimes additive and sometimes subtractive
Q.37
The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as
Ground principal point
Ground plumb point
Iso-centre
Perspective centre
Q.38
A plate parallel is the line on the plane of the negative
Parallel to the principal line
Perpendicular to the principal line
Along the bisector of the angle between the principal line and a perpendicular line through principal plane
None of these
Q.39
At eastern elongation, the pole star moves
Eastward
Westward
Northward
Southward
Q.40
The smaller horizontal angle between the true meridian and a survey line, is known
Declination
Bearing
Azimuth
Dip
Q.41
If ‘δ’ is the declination of the Polaris and ‘λ’ is the latitude of the place, the azimuth of the Polaris, is
cos δ/cos λ
cos (90° - δ)/cos (90° - λ)
sin (90° - δ)/sin (90° - λ)
tan (90° + δ)/tan (90° + λ)
Q.42
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
Q.43
‘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
H/f
f/H
H + f
Q.44
Which of the following errors can be neutralised by setting the level midway between the two stations ?
error due to curvature only
error due to refraction only
error due to both curvature and re-fraction
none of the above
Q.45
The rise and fall method
is not suitable for levelling with tilting levels
is less accurate than height of instrument method
provides a check on the reduction of intermediate point levels
quicker and less tedious for large number of intermediate sights
Q.46
A telescope is said to be inverted if its
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is up
Q.47
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
All the above
Q.48
If the staff is not held vertical at a level¬ling station, the reduced level calculated from the observation would be
true R.L.
more than true R.L.
less than true R.L.
none of the above
Q.49
At the first point of Aeries, the sun moves
Northward
Southward
From south to north of the equator
From north to south of the equator
Q.50
Which of the following is not used in measuring perpendicular offsets ?
line ranger
steel tape
optical square
cross staff
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