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Current Affairs January 2024

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4

At the first point of Aeries, the sun moves

A. Northward

B. Southward

C. From south to north of the equator

D. From north to south of the equator

Correct Answer :

C. From south to north of the equator


Related Questions

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4

The principal plane contains

A. Nadir point

B. Iso centre

C. Principal point

D. All the above

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4

From the principal point the horizon point lies on the principal line at a distance of

A. f tan θ

B. f sin θ

C. f cot θ

D. f cos θ

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4

Systematic errors

A. Always follow some definite mathematical law

B. Can be removed by applying corrections to the observed values

C. Are also known as cumulative errors

D. All the above

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4

The elevation of the star at elongation is obtained by

A. sin α = sin φ cosec δ

B. sin α = sin φ sec δ

C. sin α = cos φ sec δ

D. sin α = cos φ cosec δ

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4

The flying height of the camera is 1, 000 m above mean ground level, the distance of the top of a building from a nadir point is 10 cm and the relief displacement of building is 7.2 mm. The height of the building, is

A. 52 m

B. 62 m

C. 72 m

D. 82 m

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4

The parallax of a point on the photograph is due to

A. Ground elevation

B. Flying height

C. Length of air base

D. All the above

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4

Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year

A. Once

B. Twice

C. Thrice

D. Four times

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4

Pick up the correct statement from the following:

A. If the applied tension to the tape is more than the standard, the tension correction is positive

B. If the applied tension to the tape is less than the standard, the tension correction is negative

C. If the temperature during measurement is greater than the standard temperature, the temperature correction is positive

D. All the above

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4

The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as

A. Isocenter

B. Principal point

C. Perspective centre

D. Plumb line

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4

In triangulation surveys

A. The area is divided into triangular figures

B. Control stations are located from which detailed surveys are carried out

C. Sides are not measured excepting the base line

D. All the above

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4

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

A. Gauss' Mid Latitude formula

B. D'Alembert's method

C. Legendre's method

D. Least square method

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4

The declination and right ascension of the sun becomes 23° 27' S and 270° respectively on

A. March 21

B. June 21

C. September 21

D. December 22

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4

Pick up the incorrect statement from the following. The angular distance of heavenly bodies on observer's meridian measured from the pole, is

A. Co-declination

B. Co-altitude

C. Co-latitude

D. Polar distance

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4

A star in northern sphere is said to transit

A. When its altitude is maximum

B. When its azimuth is 180°

C. When it is in south

D. All the above

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4

The height displacement on a vertical photograph

A. Increases as the horizontal distance increases from the principal point

B. Increases as the ground elevation increases

C. Decreases as the flying height increases

D. All the above

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4

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

A. f/H

B. f/(H + h)

C. f/(H - h)

D. (H - h)/f

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4

An aerial photograph may be assumed as

A. Parallel projection

B. Orthogonal projection

C. Central projection

D. None of these

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4

To have greatest coverage of the area, the type of photography used, is

A. High oblique

B. Low oblique

C. Vertical

D. None of these

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4

The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian + longitude:

A. Mean sun

B. True sun

C. Vernal equinox

D. All the above

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4

Pick up the correct statement from the following:

A. The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph

B. The difference between the absolute parallax of two points depends upon the difference in their elevations

C. The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base

D. All the above

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4

The nautical mile is the length of

A. 1 minute of latitude

B. 1 minute of longitude

C. 1 degree of latitude

D. 1 degree of longitude

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4

The necessary geometrical condition for triangulation adjustment is:

A. The sum of the angles around a station should be 360°

B. The sum of the three angles of a plane triangle should be 180°

C. The sum of the eight angles of a braced quadrilateral should be 360°

D. All the above

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4

The angular distance of a heavenly body from the equator, measured along its meridian, is called

A. Declination

B. Altitude

C. Zenith distance

D. Co-latitude

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4

Pick up the incorrect statement from the following. High oblique photographs

A. May have tilt up to 30°

B. May include the image of the horizon

C. May not include the image of the horizon

D. None of these

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4

The latitude of a place was obtained by subtracting the declination of a star from its zenith distance, the observed star was between

A. Horizon and equator

B. Zenith and pole

C. Equator and zenith

D. Pole and horizon

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4

To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30, 000, with a camera of 30 cm focal length, the flying height is

A. 4000 m

B. 5000 m

C. 6000 m

D. 7000 m

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4

The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

A. f/H sec θ

B. f sec θ/H

C. f/H

D. f/H cos ½θ

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4

The moon rotates round the earth once in every

A. 29 days

B. 29.35 days

C. 29.53 days

D. 30 days

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4

When a star is between the pole and the horizon, the relationship between latitude (λ), zenith distance (z) and declination δ, is

A. θ = z + δ

B. θ = δ - z

C. θ = 180° - (z + δ)

D. θ = (z + δ) - 180°

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4

The value of geo-centric parallax to be added to the observed altitude of sun is

A. 9 cos α

B. 9 sin α

C. 9 tan α

D. 9 cot α