Engineering :: Surveying

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41.

When (h) is the difference in heights between the extremities of a chain length (l), then the correction for slope required is

A.	h / l	B.	h2 / l
C.	h2 / 2l	D.	h / el

42.

The longest of the chain lines used in making a survey is generally regarded as a base line.

Agree

Disagree

43.

A line joining the apex of a triangle to some fixed point on the opposite side is called a

A.	check line	B.	tie line
C.	base line	D.	none of these

44.

A line joining some fixed points on the main survey lines, is called a

A.	check line	B.	tie line
C.	base line	D.	none of these

45.

A base line in a chain survey

A.	checks the accuracy of the framework	B.	enables the surveyor to locate the interior details which are far away from the main chain lines
C.	fixes up the directions of all other lines	D.	all of the above

46.

A plumb bob is required

A.	when measuring distances along slopes in a hilly country	B.	for accurate centering of a theodolite over a station mark
C.	for testing the verticality of ranging poles	D.	all of the above

47.

Chain surveying is most suitable when

A.	area to be surveyed is small	B.	ground is fairly level and open with simple details
C.	plans are required on a large scale	D.	all of the above

48.

Chain surveying consists of the arrangement of framework of triangles because a triangle is the only simple plane figure which can be plotted uniquely if

A.	three sides	B.	three angles
C.	one side and two angles	D.	one angle and two sides

49.

In a well conditioned triangle, no angle should be less than

A.	30?	B.	40?
C.	50?	D.	60?

50.

A check line in a chain surveying

A.	checks the accuracy of the framework	B.	enables the surveyor to locate the interior details which are far away from the main chain lines
C.	fixes up the directions of all other lines	D.	all of the above