The instrument used for setting out an offset at a right angle, is called
A) open cross-staff
B) french cross-staff
C) adjustable cross-staff
D) optical square
Correct Answer:
Verified
Q1: A tie line in a chain surveying
A)checks
Q2: Generally, the deflection angle is measured twice,
Q3: Contour lines cross ridge or valley lines
Q5: The fundamental principle of surveying is to
Q6: In levelling, the effect of refraction may
Q7: The latitude of a traverse line is
Q8: In a whole circle system, the bearing
Q9: The horizontal angle between the true meridian
Q10: When the magnetic bearing of the sun
Q11: The optical square is used to measure
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