204.  If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is length of chain used
A. measured area x nominal chain length nominal chain length
B. measured area x length of chain used
C.B ba sin C
D. .N1S(S - a)(S - b)(S -C measured area x

---

205. If hi and h2 are the differences in level between ground and t formation levels, m is the slope of the sloping sides. 1) is the di nce between the cross sections then, prismoidal correction for evel section is
A. D/2m(h1 - h2
B. D/3m(h1 - hz)
C. D/6m (h1 - h2)2
D. D/6m(h1 - h2)3

---

206. Pick up the correct staterner4 from the following :
A. If the slope of the curve of a ass diagram in the direction of increasing abscissa isc1pwnward, it indicates an embankment
B. The vertical distance between a maximum dinate and the next forward maximum ordinate represents the whole volume of the embankment
C. The vertical distance between a minimum ordinate an the next forward maximum ordinate represents the whole volume of a cutting
D. all the above.

---

207. For indirect ranging, number of ranging rods required, is
A.1
B.2
C.3
D.4

---

208. The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto
A. 5"
B. 10"
C. 15"
D.C 20"

---

209. For a closed traverse the omitted measurements may be calculated
A. length of one side only
B. bearing of one side only
C. both length and bearing of one side
D. all the above.

---

210. A clinometer is used for
A. measuring angle of slope
B. correcting line of collimation setting out right angles
C. defining natural features.
D.

---