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MCQ
181. When several contours coincide, it indicates-
a vertical cliff
a valley
a ridge
an overhanging cliff
182. The spacing of cross-sections in a hilly country is usually-
5m
10m
15m
20m
183. The value of additive constant for the tacheometer varies from-
0 to 15cm
15 to 30cm
30 to 60cm
45 to 60cm
184. The vertical distance between any two consecutive contours is called-
vertical equivalent
horizontal equivalent
contour interval
contour gradient
185. The additive constant for the tacheometer is-
f/i
i/f
f/d
f+d
186. In leveling, the correction for combined curvature and refraction (in metre) is equal to-
0.00785d2
0.0785d2
0.0112d2
0.0673d2
187. The length of peg interval for flat curves is-
15m
20m
25m
30m
188. কোন বাঁকে সুপার এলিভেশন প্রয়োগ করা কষ্টকর--
যৌগিক
বিপরিত
সরল
সংযুক্ত
Explained: বিপরীত বাঁকে সুপার এলিভেশন প্রয়োগ করা কষ্টকর।
189. In leveling, the correction for curvature (in metres) is equal (D is km)-
0.00785d2
0.0785d2
0.0112d2
0.0673d2
190. Rise and fall method is used in-leveling.
profile
differential
check
none of these
191. বিষুব রেখার সম্মুখ বিয়ারিং ও পশ্চাৎ বিয়ারিং-এর পার্থক্য --
0°
90°
180°
360°
Explained: শুধু বিষুব নয় যে কোন রেখার সম্মুখ ও পশ্চাৎ বিয়ারিং ফেজ পার্থক্য ১৮০°।
192. Collimation method is used in leveling.
profile
differential
check
both (a) and (b)
193. The line joning the points having the same elevation above the datum surface, is called a-
contour surface
contour line
contour interval
contour gradient
Contour Line: An imaginary live joining the points of the same elevation above the datum surface. Contour Surface: An imaginary line at which every point is located at the same elevation above the datum. Contour Interval: The difference in elevation between successive contour lines on a map. Contour Gradient: The ratio of the vertical height to a specified horizontal distance.
194. A back sight indicates the of the instrument.
shifting
setting up
height
none of these
195. The spacing of cross-sections in a hilly country is usually-
15m
20m
25m
30m
196. The angle between the back tangent and forward tangent of a curve is known as-
deflection angle
central angle
angle of intersection
none of these
197. A staff reading taken on a benchmark or a point of known elevation is called-
F.S. reading
B.S. reading
intermediate sight
any one of these
198. The total length of the curve is equal to [R is radius of curve & ◊ is deflection angle)-
πR∅
πR∅/90
πR∅/180
πR∅/360
199. The reduced level of the plane of ৫ collimation is-height of instrument.
equal to
less than
greater than
none of these
200. The reduced level of a point on the ground is called-
spot level
spot height
either (a) or (b)
none of these