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Quiz 15
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Q.1
The true and mean suns occupy the same meridian at the same time on
April 15
June 14
September 1
All the above
Q.2
The stereo plotting instruments are generally manufactured on the principle of
Optical projection
Optical mechanism projection
Mechanical projection
All the above
Q.3
A star is said to elongate
When the star momentarily moves vertically
When the angle at the star of the spherical triangle is 90°
When the star
All the above
Q.4
For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through
Isocenter
Plumb point
Principal point
None of these
Q.5
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
Q.6
The correction applied to the measured base of length ‘L’ is
Tension = (P - Ps)L/AE
Sag = L³w²/24P² where w is the weight of tape/m
Slope = (h²/2L) + (h⁴/8L³) where h is height difference of end supports
All the above
Q.7
Which of the following is not the function of levelling head ?
to support the main part of the instrument
to attach the theodolite to the tripod
to provide a means for leveling the theodolite
none of the above
Q.8
The Polaris describes a small circle round the pole whose radius is approximately
1°
2°
3°
4°
Q.9
The allowable length of an offset depends upon the
degree of accuracy required
method of setting out the perpendiculars and nature of ground
scale of plotting
all of the above
Q.10
The zenith is the point on the celestial sphere
East of observer
West of observer
North of observer
South of observer
Q.11
The Polaris remains below horizon at
10° N
50° N Latitude
Equator
5° S latitude
Q.12
The error due to eccentricity of inner and outer axes can be eliminated by
reading both verniers and taking the mean of the two
taking both face observations and taking the mean of the two
double sighting
taking mean of several readings distributed over different portions of the graduated circle
Q.13
Overturning of vehicles on a curve can be avoided by using
compound curve
vertical curve
reverse curve
transition curve
Q.14
From the principal point the horizon point lies on the principal line at a distance of
f tan θ
f sin θ
f cot θ
f cos θ
Q.15
Closed contours, with higher value inwards, represent a
depression
hillock
plain surface
none of the above
Q.16
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.17
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.18
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.19
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° from 360° if places are in different hemispheres
All the above
Q.20
In a spherical triangle ABC right angled at C, sin b equals to
sin c sin B
cos c cos B
tan c tan B
sin c cos B
Q.21
cm ×cm photographs are taken from a flying height with a camera of focal length ofm and 15.cm respectively. A parallax difference of 0.mm represents
1 m
2 m
4 m
8 m
Q.22
If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is
πR²E/90°
πR²E/180°
πR²E/270°
πR²E/360°
Q.23
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
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