1. 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.
2. 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.
3. 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.
4. 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
Explanation: In order to measure the magnetic bearing of a line, the theodolite should be provided with either a tabular compass or trough compass.
5. In measuring direct angles, azimuths from the back line may vary from 0° to 180°.
a) true
b) false
Explanation: 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 °.
6. A deflection angle is an angle in which a survey line makes with the prolongation of the preceeding line.
a) true
b) false
Explanation: 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.
7. How methods are there for prolongation of a straight line?
a) 1
b) 2
c) 3
d) 4
Explanation: There are three methods of prolonging a straight line. Those are named as first method, second method and third method.
8. 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
Explanation: 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.
9. 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
Explanation: 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.
10. 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
Explanation: The method of repetition is used when it is required to lay off an angle with greater precision than that possible by single observations.