FUNDAMENTAL SURVEYING Angles, Bearings & Azimuths

Question 1

What is a 'deflection angle' in surveying?

Accepted Answer

The angle measured right or left from the extension of the preceding course

Answer

A deflection angle is measured from the prolongation of the back course to the forward course, designated R (right) or L (left).

Question 2

What does magnetic declination represent?

Accepted Answer

The horizontal angle between magnetic north and true geographic north

Answer

Magnetic declination is the horizontal angular difference between where a compass needle points (magnetic north) and true geographic north.

Question 3

An azimuth of 090 degrees corresponds to which cardinal direction?

Accepted Answer

East

Answer

Azimuths are measured clockwise from north: 0=N, 90=E, 180=S, 270=W.

Question 4

To compute the back azimuth of a line with a forward azimuth of 60 degrees, you would:

Accepted Answer

Add 180 to 60

Answer

Back azimuth = forward azimuth plus or minus 180; for 60 degrees, back azimuth = 60 + 180 = 240 degrees.

Question 5

A direction of S 72 degrees 15 minutes 30 seconds E is an example of a:

Accepted Answer

Bearing

Answer

Bearings are expressed as angles from north or south toward east or west, with a quadrant designation like S 72 15 30 E.

FUNDAMENTAL SURVEYING Practice Test