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# Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2

## 10 Questions MCQ Test Topicwise Question Bank for GATE Civil Engineering | Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2

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This mock test of Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2 for Civil Engineering (CE) helps you for every Civil Engineering (CE) entrance exam. This contains 10 Multiple Choice Questions for Civil Engineering (CE) Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2 quiz give you a good mix of easy questions and tough questions. Civil Engineering (CE) students definitely take this Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2 exercise for a better result in the exam. You can find other Tides, Triangulation, Astronomy And Photogrammetric Surveying - 2 extra questions, long questions & short questions for Civil Engineering (CE) on EduRev as well by searching above.
QUESTION: 1

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QUESTION: 2

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QUESTION: 3

### Spring tides are caused when

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QUESTION: 4

A star may culminate at zenith if its declination is

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QUESTION: 5

A star has a declination of 55°N its upper culmination is in the zenith of the place. The altitude of the lower culmination is

Solution:

When star’s upper culmination is in zenith, polar distance =  latitude and declination = latitude
At lower culmination, Zenith distance
= 180°- (latitude + delineation)
= 180°- 2 x 55° = 70°
Hence altitude = 90° - 70° = 20°

QUESTION: 6

A vertical photograph was taken from an aircraft flying at an altitude of 2000 m above mean sea level. The focal length of the camera is 175 mm. The scale of the photograph for a hill of an elevation of 250 m is

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QUESTION: 7

In an aerial photograph, if the photograph has a tilt of 3° and the focal length is 100 mm, then the distance between the perspective centre and the plumb point will be

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QUESTION: 8

In an aerial photograph, if the photograph has a tiit of 4° and the focal length is 200 mm, then the distance between, the principal point and plumb point will be

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QUESTION: 9

An aircraft is flying at a ground speed of 200 km/h. The focal length of the camera is 200 mm. The ground distance covered is 200 mm. The ground distance covered along the flight line between exposures is 2 km. The time interval between exposures is given by

Solution:

Time interval betw een exposures (sec) = 3600L/V where L is ground distance covered between exposures along the flight line is km and V is the ground speed of the aircraft in km/h.

QUESTION: 10

Which one of the following surveys is required in observations of stars?

Solution:

Cadastral survey is used to plot the details such as boundaries of fields, houses and property lines in rural and urban areas. These are also known as public land surveys.
Photogrammetry is used to produce a mosaic or map by compiling the photographs. Aerial survey covers photogrammetry and photo-interpretation both.