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WorksheetsCompass surveying
Total questions: 20
Worksheet time: 10mins
The meridian through a point is the line in which a plane, passing that point and the north & south poles, intersection with surface of the earth
Magnetic meridian
Arbitrary meridian
True meridian
Magnetic bearing
Box of prismatic compass box is made of
Aluminum
Brass
Steel
Iron
True meridian passes through
A fixed point
True north & true south
Equatorial line
All of the above
At equator amount of dip is
0°
45°
60°
90°
The algebraic sum of deflection angles in a closed traverse is
360°
180°
90°
0°
Magnetic meridian & true meridian are
Always parallel
Parallel near the poles
Parallel at equator
Never parallel
If n is the number of sides, then the total sum of the exterior angle in a closed traverse is ____°
(n+2)×90
(2n-4)×90
(2n+4)×90
(4n-2)×90
Local attraction in a compass survey may exist due to
Faulty adjustment in compass
Presence of magnetic materials
Loss of magnetism in the needle
Friction of the needle at the point
In surveyors compass the zero is marked at the _____of the circular graduated ring
Both north & south ends
East end
South end
North end
The magnetic bearing of a line is 85°30' ane the magnetic declination at that place is 4°30' East. True bearing will be ___°
84
90
81
91
The projection of a traverse line on a line parallel to the meridian is known as ___of the line
Latitude
Departure
Bearing
Angle
The deflection angle may have any value between ___°
0 & 45
0 & 90
0 & 120
0 & 180
The horizontal angle between the true meridian & magnetic meridian is known as
True bearing
Dip
Local attraction
Declination
In a whole circle bearing system N 25°15' E Corresponds to
115°15'
154°45'
25°15'
334°45'
The lines joining the points of equal dip are
Isogonic lines
Isoclinic lines
Aclinic lines
Agonic lines
If the length of survey line is L and the reduced bearing is ¥ then latitude of the line is
L cos¥
L sin¥
L cot¥
L tan¥
If quadrantal bearing system a line is said to be free from Local attraction, if the FB and BB are having the following relation
Numerically equal
Numerically unequal
Numerically equal with opposite quadrants
FB=BB+90°
At magnetic poles dip of a magnetic needle is
0°
45°
90°
180°
In which system the bearing of a line is measured with magnetic north in clockwise direction?
Quadrantal bearing system
Reduced bearing system
Magnetic bearing system
Whole circle bearing system
If fore bearing of a line is 130° what is the back bearing of that line?
S 40° E
N 40° W
S 50° E
N 50° W
