MCQOPTIONS
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MCQOPTIONS
This section includes 28 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Metrology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which instrument lets an operator see two photos at once? |
| A. | Goniometer |
| B. | Collimator |
| C. | Theodolite |
| D. | Stereo plotter |
| Answer» E. | |
| 2. |
Which photogrammetry method has topographical mapping as a common application? |
| A. | Interpretative Photogrammetry |
| B. | Metric photogrammetry |
| C. | Aerial Photogrammetry |
| D. | Space Photogrammetry |
| Answer» C. Aerial Photogrammetry | |
| 3. |
Which of the following option is true for given statements about photogrammetry?Statement 1: Both aerial and terrestrial photogrammetry used in Urban planning.Statement 2: Terrestrial photogrammetry is more suitable for movement related issues. |
| A. | T, T |
| B. | F, F |
| C. | F, T |
| D. | T, F |
| Answer» B. F, F | |
| 4. |
What is the type of photograph on which the apparent horizon doesn’t appear? |
| A. | Low oblique |
| B. | High oblique |
| C. | Tilted |
| D. | All type of oblique photographs |
| Answer» B. High oblique | |
| 5. |
In a vertical photograph, relief displacement is always radial from the |
| A. | Isocenter |
| B. | Nadir point |
| C. | Zenith point |
| D. | Principal point |
| Answer» E. | |
| 6. |
If net length covered by each photograph is 1.5 km and length of the strip is 18 km, then number of photographs required is |
| A. | 11 |
| B. | 12 |
| C. | 13 |
| D. | 14 |
| Answer» D. 14 | |
| 7. |
A square area (on the surface of the earth) with side 100 m and uniform height, appears as 1 cm2 on a vertical aerial photograph. The topographic map shows that a contour of 650 m passes through the area. If focal length of camera lens is 150 mm, the height from which the aerial photograph was taken is |
| A. | 800 m |
| B. | 1500 m |
| C. | 2150 m |
| D. | 3150 m |
| Answer» D. 3150 m | |
| 8. |
A section line AB appears to be 10.16 cm on a photograph for which the focal length is 16 cm. The corresponding line measures 2.54 cm on a map, which is to a scale \(\frac{1}{{50,000}}\). The terrain has an average elevation of 200 m above mean sea level. The flying altitude of the aircraft above mean sea level during photograph will be |
| A. | 1800 m |
| B. | 2000 m |
| C. | 2200 m |
| D. | 2400 m |
| Answer» D. 2400 m | |
| 9. |
Overlap in aerial photography refers to |
| A. | the overlap of ground due to inclination of cameras |
| B. | the overlap of ground features due to difference in elevations of objects |
| C. | the same ground features taken from two cameras positions |
| D. | the blurring due to lack of focus in photographs |
| Answer» D. the blurring due to lack of focus in photographs | |
| 10. |
Aerial photographs are required to be taken to cover an area of 150 km2. The longitudinal and side overlaps are to be 60% and 30% respectively. The scale of photograph is 1 cm = 100 m; and the size of each photograph is 20 cm × 20 cm. The minimum required number of photographs will be |
| A. | 170 |
| B. | 158 |
| C. | 146 |
| D. | 134 |
| Answer» E. | |
| 11. |
A camera with a focal length of 20 cm fitted in an aircraft is used for taking vertical aerial photographs of a terrain. The average elevation of the terrain is 1200 m above mean sea level (MSL). What is the height above MSL at which an aircraft must fly in order to get the aerial photographs at a scale of 1:8000? |
| A. | 3200 m |
| B. | 2800 m |
| C. | 2600 m |
| D. | 3000 m |
| Answer» C. 2600 m | |
| 12. |
A vertical photograph of a flat area having an average elevation of 250 m above mean sea level was taken with a camera of focal length 25 cm. A section Line AB 300 m long m the area measures 15 cm on the photograph; a tower BP in the area also appears on the photograph. The distance between images of top and bottom of the tower measures 0.5 cm on the photograph. The distance of the Image of the top of the tower is 10 cm. The actual height of the tower is |
| A. | 10 m |
| B. | 15 m |
| C. | 20 m |
| D. | 25 m |
| Answer» E. | |
| 13. |
A vertical photograph is taken at an altitude of 1200 m ‘above mean sea level’ (a.m.s.l.) of a terrain lying at an elevation of 80 m (a.m.s.l.) The focal length of camera is 15 cm. The scale of the photograph will be nearly |
| A. | 1 : 8376 |
| B. | 1 : 7467 |
| C. | 1 : 6558 |
| D. | 1 : 5649 |
| Answer» C. 1 : 6558 | |
| 14. |
A flagpole appears in two successive photographs taken at an altitude of 2,000 m above datum. The focal length of the camera is 120 mm and the length of the air base is 200 m. The parallax for the top of the pole is 52.52 mm and for the bottom is 48.27 mm. Find the difference in elevation between the top and the bottom of the pole. |
| A. | 55 m |
| B. | 44.2 m |
| C. | 67 m |
| D. | 30 m |
| E. | 50 m |
| Answer» C. 67 m | |
| 15. |
______ is the process of rephotographing an aerial photograph so that the effects of tilt are eliminated. |
| A. | Rectification |
| B. | Reflection |
| C. | Radiation |
| D. | Refraction |
| E. | Diffraction |
| Answer» B. Reflection | |
| 16. |
A camera equipped with a 152 mm focal length lens is used to take a vertical photograph from a flying height of 2780 m above mean sea level. If the terrain is flat and located at an elevation of 500 m, the scale of the photograph will be |
| A. | 1 : 15000 |
| B. | 1 : 20000 |
| C. | 1 : 22000 |
| D. | 1 : 24500 |
| Answer» B. 1 : 20000 | |
| 17. |
Parallax in aerial photographs is an error due to |
| A. | movement of camera and ground relief |
| B. | overlap in photographs |
| C. | distortion caused by camera lens |
| D. | distortion due to lack of focus |
| Answer» B. overlap in photographs | |
| 18. |
In photographic surveying, the bisectors of an angle between the lines joining the plumb points and principal points intersect the ground and picture planes at ‘I’ and ‘i’ respectively called |
| A. | Angle of tilts |
| B. | Principal points |
| C. | Isocentres |
| D. | Plumb points |
| Answer» D. Plumb points | |
| 19. |
WHICH_PHOTOGRAMMETRY_METHOD_HAS_TOPOGRAPHICAL_MAPPING_AS_A_COMMON_APPLICATION??$ |
| A. | Interpretative Photogrammetry |
| B. | Metric photogrammetry |
| C. | Aerial Photogrammetry |
| D. | Space Photogrammetry |
| Answer» C. Aerial Photogrammetry | |
| 20. |
Which_instrument_lets_an_operator_see_two_photos_at_once?$ |
| A. | Goniometer |
| B. | Collimator |
| C. | Theodolite |
| D. | Stereo plotter |
| Answer» E. | |
| 21. |
Which of the following option is true for given statements about photogrammetry? |
| A. | |
| B. | |
| Answer» B. | |
| 22. |
Which is not correct about interpretative photogrammetry? |
| A. | It form basis for remote sensing |
| B. | Involves study of photographic images |
| C. | Involves recognition and identification of objects and judgement of their significance |
| D. | Also involves the use of collected data after analysis |
| Answer» E. | |
| 23. |
What is the type of photograph on which the apparent horizon doesn’t appear?$ |
| A. | Low oblique |
| B. | High oblique |
| C. | Tilted |
| D. | All type of oblique photographs |
| Answer» B. High oblique | |
| 24. |
What is the type of photograph if the tilt of the axis of the camera from the plumb line is 2 degrees? |
| A. | Oblique photograph |
| B. | Horizontal photograph |
| C. | Tilted photograph |
| D. | Vertical photograph |
| Answer» E. | |
| 25. |
What is the fundamental principle of photogrammetry? |
| A. | Interference |
| B. | Resection principle |
| C. | Triangulation |
| D. | Intersection principle |
| Answer» D. Intersection principle | |
| 26. |
What does close range photogrammetry called in computer vision community? |
| A. | Topographic modeling |
| B. | Image-based modeling |
| C. | Aerial photogrammetry |
| D. | Engineering photogrammetry |
| Answer» C. Aerial photogrammetry | |
| 27. |
What does the inner orientation of camera define in photogrammetry imaging process? |
| A. | Geometric parameters of the imaging process |
| B. | Location of object points in space |
| C. | View direction |
| D. | Finding fixed points |
| Answer» B. Location of object points in space | |
| 28. |
How many location photographs are required (at least) for photogrammetry? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |