This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on “Theodolite Traversing – Adjustment”.

1. To measure the horizontal angle which of the following is the first step?
a) Releasing all clamps
b) Levelling instrument
c) Turning plates
d) Clamping the plates

Explanation: To measure the horizontal angle, firstly we set up instrument and level it. Secondly, releases all clamps. Turning the upper and lower plates in opposite directions till the zero of the one of the vernier is against the zero of the scale. Next clamp the plates together by upper clamp and lower clamp and bring the two zeros into exact coincidence by turning upper tangent screw. It continues next procedure.

2. After setting up the instrument first thing done by the surveyor is _________
a) releasing all clamps
b) levelling instrument
c) turning plates
d) clamping the plates

Explanation: Firstly, we set up an instrument and level it. Secondly, releases all clamps.

3. The method of repetition is used to measure a horizontal angle to a finer degree of accuracy than that obtained with the least count of the vernier.
a) True
b) False

Explanation: In this method of repetition, angle is measured two or more times by allowing the vernier to remain clamped each time at the end of each measurement. Instead of setting it back at zero when sighting at previous station.

4. After levelling of an instrument is done what is the next up?
a) Releasing all clamps
b) Loosing the lower clamp
c) Turning plates
d) Clamping the plates

Explanation: To measure the horizontal angle, firstly we set up instrument and level it. Secondly, releases all clamps.

5. To measure a horizontal angle, after releasing all clamps, we turn the upper and lower plates in the same direction.
a) True
b) False

Explanation: After releasing all clamps. Turning the upper and lower plates in opposite directions till the zero of the one of the vernier is against the zero of the scale.
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6. If one of the vernier is at 0° then another vernier reading shows / also shows ______
a) 90°
b) 0°
c) 180°
d) 45°

Explanation: Turning the upper and lower plates in opposite directions till the zero of the one of the vernier is against the zero of the scale. Next clamp the plates together by upper clamp and lower clamp and bring the two zeros into exact coincidence by turning upper tangent screw. Now when we take reading on another vernier it should be 180°, if there is no instrument error.

7. To measure a horizontal angle by direct method is also called a repetition method.
a) True
b) False

Explanation: To measure a horizontal angle by direct method is also called the reiteration method. It is suitable for measurements of angles of a group having a common vertex point.

8. For measuring an angle to the highest degree of precision, several sets of repetitions are usually taken.
a) True
b) False

Explanation: For measuring an angle to the highest degree of precision, several sets of repetitions are usually taken. There are two methods of taking single set.

9. In first method of taking single set, after keeping the telescope normal throughout we measure the angle clockwise by 6 repetitions. We obtain the first value of the angle by dividing the final reading by _______
a) 2
b) 3
c) 4
d) 6

Explanation: In first method of taking a single set, after keeping the telescope normal throughout we measure the angle clockwise by 6 repetitions. We obtain the first value of the angle by dividing the final reading by 6.

10. While measuring the set of observations, the transit should be levelled each time for high degree of precision.
a) True
b) False

Explanation: During an entire set of observations, the transit should not be re-levelled. Because it may change the reading and errors in reading occurs.

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