323. The additional lines which are measured to show the correctness of the chain surveying are called :
A. check dines
B. proof lines
C. tie lines
D. all of these.

---

324. Pick up the correct statement from the following :
A. the framework which consists of a series of connected lines, the lengths and directions of which are found from measurements, is called a traverse.
B. the system of a series of lines which forms a circuit which ends at the starting point, is called a closed traverse
C. the traverse that starts from a point already fixed in some survey system and ends on another such point, is called a controlled traverse
D. all the above.

---

325. Pick up the correct statement from the following :
A. The horizontal angle between magnetic meridian and true meridian at a place is called magnetic declination or variance of the compass
B. the imaginary lines which pass through points at which the magnetic declinations are equal at a given time are called isogonic lines
C. the isogonic lines through places at which the declination is zero are termed agonic lines
D. all the above.

---

326. If the declination of the needle is 10? W
A. each of the whole circle reckoning has to be micros by 10?
B. in the quadrantal method, the correction is positive in the 1st and 3rd quadrants
C. in the quadrantal method, the corrections is negative in 2nd and 4th quadrants
D. all the above.

---

327. There are two stations A and B. Which of the following statements is correct :
A. the fore bearing of AR is AB.
B. the back bearing of AB is BA.
C. the fore and back bearings of AB differ by 1800
D. all the above.

---

328. Pick up the correct statement from the following
A. 1 second of arc corresponds to a displacement ratio of 1: 206,300
B. 1 degree of arc corresponds to a displacement ratio of 1: 57
C. the angular errors tend to propagate themselves along a traverse as the square root of the number of stations
D. all the above.

---

329. If deflection angles are measured in a closed traverse, the difference between the sum of the right-hand and that of the left hand angles should be equal to
A. 0?
B. 90?
C. 180'
D. 360?.

---