Surveying Multiple Choice Questions on “Theodolite Traversing – Methods”.
1. In order to measure the magnetic bearing of a line, the theodolite should be provided with ______
a) extra telescope
b) spirit level
c) compass
d) tabular or trough compass
Answer: d
Clarification: In order to measure the magnetic bearing of a line, the theodolite should be provided with either a tabular compass or trough compass.
2. Direct angles are angles measured clockwise from the preceding line to the following line.
a) True
b) False
Answer: a
Clarification: Direct angles are angles measured clockwise from the preceding line to the following line. They are also known as angles to the right or azimuths from the back line.
3. In measuring direct angles, azimuths from the back line may vary from 0° to 180°.
a) True
b) False
Answer: b
Clarification: Direct angles are angles measured clockwise from the preceding line to the following line. They are also known as angles to the right or azimuths from the back line. They may vary from 0° to 360 °.
4. A deflection angle is an angle in which a survey line makes with the prolongation of the preceeding line.
a) True
b) False
Answer: a
Clarification: A deflection angle is an angle in which a survey line makes with the prolongation of the preceding line. It is designated as right (R) or left (L) according to its measure to the clockwise or to anti clockwise from the prolongation of the previous line.
5. How methods are there for prolongation of a straight line?
a) 1
b) 2
c) 3
d) 4
Answer: c
Clarification: There are three methods of prolonging a straight line. Those are named as first method, second method and third method.
6. To run a straight line between two points, when both ends are inter visible. We establish intermediate points through ________
a) line of sight
b) balancing
c) using random line
d) back sight
Answer: a
Clarification: Set instrument at A and take sight on B. Establish intermediate points C, D, E etc. In the line of sight. It possible only in case both ends are inter visible.
7. To locate the point of intersection of two straight lines, we stretch a thread or string between two stakes, where line of sight cuts the string is over required point of intersection.
a) True
b) False
Answer: a
Clarification: Let it be required to locate the point of intersection P of the two lines AB and CD. Set the instrument at A, sight B and set two stakes a and b a short distance apart on either side of the estimated position of point P. Set the instrument at C and sight D. Stretch a thread or string between ab and locate P, where the line of sight cuts the string.
8. Theodolite can be used to lay off a horizontal angle.
a) True
b) False
Answer: a
Clarification: Theodolite can be used to lay off a horizontal angle. It also used to locate the point of intersection, to run a straight line between two points, to prolong straight line etc.
9. The method of repetition is used when it is required to lay off an angle with greater precision than that possible by single observations.
a) True
b) False
Answer: a
Clarification: The method of repetition is used when it is required to lay off an angle with greater precision than that possible by single observations.
10. To measure a vertical angle, the instrument should be levelled with reference to the line of sight.
a) True
b) False
Answer: b
Clarification: To measure a vertical angle, the instrument should be levelled with reference to the altitude bubble. When the altitude bubble is on the index frame procedure starts.