List of practice Questions

In a Landsat-8 scene, digital number (DN) values of a pixel in band-4, band-5 and band-10 are 80, 100 and 30, respectively. What would be the NDVI value for the same pixel (round off to 3 decimal places)?
A staff is held vertical at a distance of 100 m and 300 m, respectively. Observations are taken with a Tacheometer and staff intercepts, with the telescope kept horizontal, are 0.990 m and 3.000 m, respectively. The theodolite is set over a station having a RL of 950.500 m and the height of instrument is 1.425 m. The multiplicative constant of the Tacheometer is __________________ (round off to 2 decimal places).
Survey of India topographic sheet is 53G/12. At this scale, the number of toposheets that would cover a land area equivalent to 4 degree by 4 degree is __________________ (in integer).
The correlation coefficient between two bands of remote sensing data that would yield good classification is
In a covariance matrix, the main diagonal shows the __________________ of each band.
A map projection is
Face Left and Face Right observations using a vernier theodolite will eliminate
The parallax of a point ‘a’ on a pair of successive overlapping photographs is 73.22 mm and the micrometer reading of a parallax bar of point ‘a’ is 12.10 mm. Similarly, the micrometer reading of the parallax bar of point ‘b’ is 9.65 mm, then the parallax of the point ‘b’ is __________________ mm (round off to 2 decimal places).
The scale of an aerial photograph is 5 mm = 100 m. The size of the photograph is 23 cm × 23 cm. If the longitudinal overlap is 65% and sidelap is 20%, the number of photographs required to cover an area of 12.5 km × 8 km is __________________ (in integer).
An instrument is set up at a station P and the angle of depression to a vane, 1.20 m above the foot of the staff held at Q is 5°. The horizontal distance PQ is observed to be 300 m. The R.L. of point Q is __________________ m (round off to 3 decimal places). Given that the staff reading at a BM (Elevation 436.050 m) is 2.865 m.
Bowditch rule for adjusting a closed traverse of perimeter ‘l’ is based on the assumption that the probable error is proportional to
Select the INCORRECT statement:
A topographic map prepared by Survey of India covers 1 degree by 1 degree area on a single map. The minimum ground distance which can be represented on this map is __________________ m (round off to 2 decimal places).
In a closed traverse, the sum of the latitudes is 1.39 m and the sum of the departures is 2.17 m. The Length and Whole Circle Bearing of the closing error are
In surveying, an odometer is used for measuring
Choose the CORRECT statement(s).
Choose the CORRECT statement(s).
If a 1:50,000 scale map is digitized to an accuracy of ± 0.5 mm, the level of error that might be expected in ground is ± __________________ m (in integer).
The main principle of Surveying is to work from
The type of survey carried out to define the property boundaries for transfer of land property is called
Departure of a line of a traverse is obtained by multiplying its length by the __________________ of the reduced bearing of the line.
The multiplying constant of a Tacheometer, where \( f \) is the focal length and \( i \) is the distance between the stadia hairs, is
The camera axis of an aerial camera is defined as
Centroid of a polygon is
The area of a buffer of 50 m around a proposed 1 km straight road segment to restrict any future construction is __________________ sq. m. (in integer). (Take the value of $\pi = 3.14$)