Surveying
The permissible error in chaining for measurement with chain on rough or hilly ground is

1 in 500
1 in 1000
1 in 100
1 in 250

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Surveying
The meridian of a place is

A semi-circle which passes through the place and is terminated at the poles
An arc of the great circle which passes through the place and is perpendicular to the equator
A great circle passing through the place and the poles
A great circle whose plane is perpendicular to the axis of rotation and it also passes through the place

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Surveying
The difference between a level line and a horizontal line is that

both are same
horizontal line is normal to plumb line while level line may not be normal to the plumb line
level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line
level line is a curved line while hori-zontal line is a straight line

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