If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is

Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is

only (i)

both (ii) and (iii)

only (iii)

both (i) and (iv)

only (i)

both (ii) and (iii)

only (iii)

both (i) and (iv)

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Homologous point is

All listed here

Ground isocenter

Photo principal point

Ground principal point

All listed here

Ground isocenter

Photo principal point

Ground principal point

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The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is

1 : 15,000

1 : 30,000

1 : 20,000

1 : 10,000

1 : 15,000

1 : 30,000

1 : 20,000

1 : 10,000

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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

82 m

72 m

52 m

62 m

82 m

72 m

52 m

62 m

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If α is the observed altitude, the refraction correction in seconds, is

58 sin α

58" cot α

58" tan α

58 cos α

58 sin α

58" cot α

58" tan α

58 cos α

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Surveying
If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

99.345 m

100.345 m

100.655 m

101.870 m

99.345 m

100.345 m

100.655 m

101.870 m

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Surveying

Surveying Homologous point is

Surveying The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is

Surveying 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

Surveying If α is the observed altitude, the refraction correction in seconds, is

Surveying If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is

Surveying
Homologous point is

Surveying
The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is

Surveying
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

Surveying
If α is the observed altitude, the refraction correction in seconds, is

Surveying
If the R.L. of a B.M. is 100.00 m, the back- sight is 1.215 m and the foresight is 1.870 m, the R.L. of the forward station is