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Current Affairs January 2024

What is the correct answer?

4

Pick up the correct statement from the following:

A. One degree of longitude has greatest value at the equator

B. One degree of longitude has greatest value at the poles

C. One degree of longitude has the same value everywhere

D. One degree of latitude decreases from the equator to the poles

Correct Answer :

A. One degree of longitude has greatest value at the equator


Related Questions

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4

If v, t and f/H are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement

A. i = v. t. H/f

B. i = v. f/t. H

C. i = v. t. (f/H)

D. i = t. H/v. f

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4

If 16 flight lines are run perpendicular to an area 30 km wide, their spacings on a photographical map on scale 1 : 50,000 , will be

A. 1 cm

B. 2 cm

C. 3 cm

D. 4 cm

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4

Pick up the incorrect statement from the following. In a spherical triangle

A. Every angle is less than two right angles

B. Sum of the three angles is equal to two right angles

C. Sum of the three angles less than six right angles and greater than two right angles

D. Sum of any two sides is greater than the third

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4

The latitude (λ) of a place and the altitude (α) of the pole are related by

A. λ = α

B. λ = 90° - α

C. λ = α - 90°

D. λ = 180° - α

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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

Pick up the correct statement from the following:

A. Centre of the celestial sphere is taken as the position of the observer

B. Centre of the celestial sphere is taken as the centre of the earth

C. Stars move and maintain their relative positions

D. All the above

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4

A star is said to elongate

A. When the star momentarily moves vertically

B. When the angle at the star of the spherical triangle is 90°

C. When the star's declination is greater than the observer's latitude

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 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

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. Ursa Minor's remains always north of pole star

B. Polar star remains always north of Polaris

C. Polaris remains always north of Ursa Minor's

D. Ursa Minor's pole star and Polaris are the names of the same star

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4

The time interval between successive transits of the moon, is

A. 24 hours 10 minutes

B. 20 hours 25 minutes

C. 24 hours 50 minutes

D. 23 hours 50 minutes

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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

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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'

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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 want of correspondence in stereo-photographs

A. Is a good property

B. Is a function of tilt

C. Is not affected by the change of flying height between photographs

D. Is minimum when θ is 3°

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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

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4

The altitude of a heavenly body is its angular distance, measured on the vertical circle passing through the body, above

A. Equator

B. Horizon

C. Pole

D. None of these

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4

Pick up the correct statement from the following:

A. Sidereal time at any instant is equal to the hour angle of the first point of Aries

B. Local sidereal time of any place is equal to the right ascension of its meridian

C. Sidereal time is equal to the right ascension of a star at its upper transit

D. All the above

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4

The angle between the direction of star and the direction of earth's axis of rotation is called

A. Co-declination

B. Co-latitude

C. Declination

D. Latitude

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4

Perspective centre relates to

A. Parallel projection

B. Orthogonal projection

C. Central projection

D. None of these

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4

The orthogonal projection of the perspective centre on a tilted photograph, is called

A. Nadir

B. Isocenter

C. Principal point

D. Plumb point

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4

The Polaris describes a small circle round the pole whose radius is approximately

A.

B.

C.

D.

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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

Accidental errors

A. Do not follow any definite mathematical law

B. Cannot be removed by applying corrections to the observed values

C. Are generally small

D. All the above

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4

In a tropical year, the numbers of sidereal days are

A. One less than mean solar days

B. One more than mean solar days

C. Equal to mean solar days

D. None of these

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4

The most convenient co-ordinate system for specifying the relative positions of heavenly bodies on the celestial sphere, is

A. Altitude and azimuth system

B. Declination and hour angle system

C. Declination and right ascension system

D. Declination and altitude system

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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

The correction applied to the measured base of length L is

A. Tension = (P - Ps)L/AE

B. Sag = L3w²/24P² where w is the weight of tape/m

C. Slope = (h²/2L) + (h4/8L3) where h is height difference of end supports

D. All the above

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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

The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by

A. sin λ

B. cos λ

C. tan λ

D. cot λ