# Surveying Questions and Answers – Traversing by Direct Observation of Angles

This set of Surveying Questions and Answers for Experienced people focuses on “Traversing by Direct Observation of Angles”.

1. In which of the following transverse method angles are measured by theodolite?
a) By fast needle
b) By direct observation of angles
c) By locating details with transit and tape
d) By free needle

Explanation: In transversing by direct observation of angles, angles between the lines are directly measured by a theodolite. The method is therefore accurate in comparison to the previous three methods.

2. In transversing by direct observation of angles, magnetic bearing of any one line can also be measured if required.
a) True
b) False

Explanation: The magnetic bearings of any one line can be measured and magnetic bearing of other lines can be calculated. The angles measured at different stations may be either included angle and deflection angle.

3. Transversing by included angles comes under which of the following?
a) Transversing by fast needle
b) Transversing by free needle
c) Transversing by direct observation of angles
d) Transversing by chain and compass

Explanation: Transversing by included angles and transversing by deflection angles comes under transversing by direct observation of angles.

4. __________ at a station is either of the two angles by the two survey lines meeting there.
a) Included angle
b) Deflection angle
c) Transverse angle
d) Deviated angle

Explanation: An included angle at a station is either of the two angles formed by the two survey lines meeting there. The method consists simply in measuring each angle directly from a backsight on the preceding station.

5. Included angles can be measured _________
a) Clockwise
b) Counter clockwise
c) Clockwise and counterclockwise
d) Clockwise or counterclockwise

Explanation: Included angles can be measured either clockwise or counterclockwise. But it is better to measure all angles clockwise.

6. All angles are preferred to measure clockwise because of the graduations of theodolite circle increase in this direction.
a) True
b) False

Explanation: It is better to measure included angles clockwise. It is because of the graduations of theodolite circle increase in this direction.

7. A deflection angle is an angle in which a survey line makes with prolongation of back sight.
a) True
b) False

Explanation: A deflection angle is an angle in which a survey line makes with the prolongation of the preceding line.

8. Transversing by deflection angles is more suitable for surveys of roads railways, pipe lines etc.
a) True
b) False

Explanation: Transversing by deflection angles is more suitable for surveys of roads railways, pipe lines etc, where the survey lines make small deflection angles.

9. Deflection angle may vary from __________ to __________
a) 0° to 90°
b) 90° to 180°
c) 0° to 180°
d) 0° to 270°

Explanation: A deflection angle is an angle in which a survey line makes with the prolongation of the preceding line. It may vary from 0° to 180°.

10. In following figure deflection angle at Q is teta L.
a) True
b) False

Explanation: The deflection angle at Q is alpha R and that at R is teta L.

Sanfoundry Global Education & Learning Series – Surveying.

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