Surveying Practice | Set-5 | Compass Survey

1. Agate cap is provided in _

Prismatic Compass
Surveyor’s compass
Digital Compass
It is common for all type of compass

2. Dark glasses are provide in which type of survey instrument_

Digital compass
Prismatic Compass
Surveyor’s Compass
Plumb Bob

3. Red Glass is provided in survey compass for _

sighting dark object at night
sighting luminous object at day time
sighting luminous object at night.
to sight long distance object.

4. Blue glass is used in prismatic compass to _

Reduce the strain on the observer’s eye in night time.
Increase the visibility in bright day light.
Reduce the strain on the observer’s eye in the bright day light.
Help to magnify the object.

5. The use of brake pin in prismatic compass_

To lift the needle out of the pivot.
To stop the oscillations of the ring.
To keep sharp the tip of pivot.
To lock the ring when taking reading.

7. E and W direction interchanged for _

Surveyor’s Compass
Digital compass
Plumb Bob
Prismatic Compass

8. Tripod is not essential for _

Theodolite
Surveyor’s Compass but prismatic compass.
Both prismatic and surveyor’s compass.
Prismatic Compass but surveyor’s compass

9. If the magnetic bearing of a line PQ is 45°23’ it the magnetic declination is 7°13’ w then, what is the true bearing of the line.

38°
37°10’
38°10’
52°36’

10. In compass survey magnetic bearing of a line shows N 36°04’ W, the magnetic declination at the location is 6°03’W, the find out the True Bearing of the line.

a) S 36° 04’E
b) 29°01’
d) 36’
c) N 30°01’ W

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