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Current Affairs January 2024

What is the correct answer?

4

The angle between the plane of the equator and the plane of the ecliptic, is known as obliquity of the ecliptic and its value is

A. 22° 30'

B. 23° 27'

C. 23° 30'

D. 24° 0'

Correct Answer :

B. 23° 27'


Related Questions

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4

Pick up the correct statement from the following:

A. The principal point coincides with plumb point on a true vertical photograph

B. The top of a hill appears on a truly vertical photograph at greater distance than its bottom from the principal point

C. The top of a hill is represented on a vertical photograph at larger scale than the area of a nearby valley

D. All the above

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4

The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is

A. B = bH/f

B. B =f/bH

C. B = b/fH

D. B = H/bf

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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

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

In a tropical year, the numbers of sidereal days are

A. 365

B. 365.2224

C. 365.2422

D. 366.2422

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4

Pick up the correct statement from the following:

A. The vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane

B. The angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star

C. The complement of the altitude of star is called the zenith distance of the star

D. All the above

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4

The prime vertical passes through

A. The east point of the horizon

B. The west point of the horizon

C. The zenith point of the observer

D. All the above

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4

The station where observations are not made, but the angles at the station are used in triangulation series, is known as

A. Satellite station

B. Subsidiary station

C. Pivot station

D. Main station

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4

The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is

A. 80°

B. 70°

C. 60°

D. 50°

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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

For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are

A. Two angle equations and two side equations

B. One angle equation and three side equations

C. Three angle equations and one side equation

D. None of these

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4

Pick up the in-correct statement from the following:

A. Apparent solar time is measured from the lower transit of the true sun

B. Mean solar time is measured from the lower transit of the mean sun

C. Sidereal time is measured from the lower transit of the first point of Aries

D. Sidereal time is measured from the upper transit of the first point of Aries

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4

Circumpolar stars

A. Rotate round the North Pole

B. Rotate round the celestial pole

C. Remain always above the horizon

D. Are seldom seen near the pole star

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4

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

A. sin H = tan φ . cot δ

B. cos H = tan φ . cot δ

C. tan H = tan φ . cot δ

D. None of these

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4

The average eye base is assumed as

A. 58 mm

B. 60 mm

C. 62 mm

D. 64 mm

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4

The position of a heavenly body on the celestial sphere can be completely specified by

A. Its altitude and azimuth

B. Its declination and hour angle

C. Its declination and right ascension

D. All the above

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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

Places having same latitude

A. Lie on the parallel of the latitude

B. Are equidistant from the nearer pole

C. Are equidistant from both the poles

D. All the above

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4

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

A. sin z = sec φ . cos δ

B. cos z = sec φ . cos δ

C. tan z = sec φ . cos δ

D. None of these

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4

The sun's declination remains north between

A. March 21 to June 21

B. June 21 to September 21

C. September 21 to December 21

D. Both (a) and (b) of above

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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

G.M.T. corresponding to given mean time, equals

A. L.M.T. - East longitude in time

B. L.M.T. + East longitude in time

C. L.M.T. - West longitude in time

D. None of these

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4

If the general ground level of any area is 10% of the flying height, the principal points may be used as the centres of radial directions for small scale mapping even in tilted photograph up to

A.

B.

C.

D.

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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

With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

A. 7 h 00 m

B. 7 h 30 m

C. 8 h 00 m

D. 9 h 00 m

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4

The great circle whose plane is perpendicular to the axis of rotation of the earth, is called

A. Equator

B. Terrestrial equator

C. 0° latitude

D. All the above

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4

The rate of change of parallax dp/dh with respect to change in h, may be expressed as

A. fB/(H - h)

B. fB/(H - h)2

C. fB/(H + h)

D. fB/(H + h)2

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4

If S is the sum of three angles of a spherical triangle, the spherical excess equals

A. S - 90°

B. S - 180°

C. S - 270°

D. S - 360°

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4

Rotation of the camera at exposure about horizontal axis normal to the line of flight, is known as

A. Swing

B. Tilt

C. Tip

D. None of these

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4

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

A. 2 mm

B. 4 mm

C. 6 mm

D. 10 mm