Multiple Choice Question (MCQ)
Question: What is the name of the levelling while the relative elevations of different points are obtained by measuring the vertical angles and horizontal distance?
A.
Fly levelling
B.
Check levelling
C.
Barometric levelling
D.
Trigonometric levelling
Correct Answer: Trigonometric levelling
Explanation
In gas welding the acetylene cylinder is painted with maroon colour.