Which of the following methods of levelling makes use of the phenomeno – McqOptions

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1.	Which of the following methods of levelling makes use of the phenomenon that difference in elevation between two points is proportional to the difference in atmospheric pressures at these points?
A.	Barometric levelling
B.	Trigonometric levelling
C.	Spirit levelling
D.	Traverse levelling
Answer» B. Trigonometric levelling

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