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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

Correct Answer :

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


Related Questions

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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

The average eye base is assumed as

A. 58 mm

B. 60 mm

C. 62 mm

D. 64 mm

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4

If δ is the declination of the Polaris and λ is the latitude of the place, the azimuth of the Polaris, is

A. cos δ/cos λ

B. cos (90° - δ)/cos (90° - λ)

C. sin (90° - δ)/sin (90° - λ)

D. tan (90° + δ)/tan (90° + λ)

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4

The great circle along which the sun appears to trace on the celestial sphere with earth as centre during the year, is called

A. Equator

B. Celestial equator

C. Ecliptic

D. None of these

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4

The method of surveying by triangulation was first introduced by the Dutchman Snell in

A. 1600

B. 1615

C. 1630

D. 1650

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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 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

Pick up the correct statement for horizontal photographs.

A. Parallel lines do not appear parallel in central projection

B. The two sides of a road meet at the vanishing point

C. The lines parallel to the negative plane are projected as parallel lines

D. All the above

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4

At upper culmination, the pole star moves

A. Eastward

B. Westward

C. Northward

D. Southward

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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

In a spherical triangle ABC, right angled at C, sin b equals

A. sin a cos A

B. cos a sin A

C. tan a cot A

D. cot A tan a

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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

The slotted template method

A. Is prepared, by graphical method

B. Is suitable for large areas with less control

C. Is rapid and accurate

D. All the above

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4

Polaris is usually observed for the determination of the azimuth when it is

A. At culmination

B. At elongation

C. Neither at culmination nor at elongation

D. Either at culmination or at elongation

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4

The longitudes of two places at latitude 60° N are 93° E and 97° W. Their departure is

A. 5100 nautical miles

B. 5700 nautical miles

C. 120 nautical miles

D. 500 nautical miles

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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

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

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 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 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

The altitude of a circumpolar star is maximum when it is

A. At east elongation

B. At upper culmination

C. At west elongation

D. At lower culmination

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4

Pick up the correct statement from the following:

A. The star's movement is apparent due to the actual steady rotation of the earth about its axis

B. The stars move round in circular concentrated parts

C. The centre of the circular paths of stars is the celestial pole

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

If the equatorial distance between two meridians is 100 km, their distance at 60° latitude will be

A. 1000 km

B. 800 km

C. 600 km

D. 500 km

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4

The main object of the astronomer to obtain

A. Astronomical latitude

B. Astronomical longitude

C. Astronomical bearing

D. All of these

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4

At eastern elongation, the pole star moves

A. Eastward

B. Westward

C. Northward

D. Southward

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4

The equation which is obtained by multiplying each equation by the coefficient of its un-knowns and by adding the equations thus formed, is known as

A. Observation equation

B. Conditional equation

C. Normal equation

D. None of these

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4

Pick up the correct statement from the following:

A. Aerial photographs may be either vertical or oblique

B. Vertical photographs are taken with the axis of camera pointing vertically downward

C. Vertical photographs are used for most accurate maps

D. All the above

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4

Triangulation surveys are carried out for locating

A. Control points for surveys of large areas

B. Control points for photogrammetric surveys

C. Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.

D. All the above

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4

According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

A. Tangents of two adjacent parts

B. Sines of two adjacent parts

C. Cosines of two adjacent parts

D. Both (a) and (b) above