Surveying and Levelling

111. If 'L' is the perimeter of a clossed traverse, ΔD is the closing error in departure, the correction for the departure of a traverse side of length 'l', according to Bowditch rule, is

1. ΔD × L/l
2. ΔD × l²/L
3. L × l/ΔD
4. ΔD × l/L

View answer

112. If L is the specified length of a tape, L₁ its actual length and S the measured distance, then, the true distance is given by the formula,

1. (L₁/L) × S
2. (L/L₁ × S
3. (L - L₁)/L × S
4. (L₁/L)² × S

View answer

113. If 'l' is the stadia distance, 'f' is the focal length and 'd' is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is

1. f/i
2. i/f
3. (f + d)
4. f/d

View answer

114. If 'R' is the radious of the main curve, θ the angle of deflection, 'S' the sfift and 'L' the length of the transition curve, then, total tangent length of the curve, is

1. (R - S) tan θ/2 - L/2
2. (R + S) tan θ/2 - L/2
3. (R + S) tan θ/2 + L/2
4. (R - S) tan θ/2 + L/2

View answer

115. If 'S' is the length of a sub-chord and 'R' is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to

1. 573 S/R
2. 573 R/S
3. 1718.9 R/S
4. 1718.9 S/R

View answer

116. If the angular measurements of a traverse are more precise than its linear measurements, balancing of the traverse, is done by

1. Bowditch's rule
2. Transit rule
3. Empirical rule
4. All of the above

View answer

117. If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is

1. Measured area × (Length of chain used/Nominal chain length)
2. Measured area × (Nominal chain length/ Length of chain used)
3. Measured area × (Nominal chain length/ Length of chain used)²
4. Measured area × (Length of chain used/Nominal chain length)²

View answer

118. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping

1. It is possible to set offsets correctly on east side
2. It is possible to set offsets correctly on east side
3. It is not possible to set offsets correctly on west side
4. It is possible to set offsets correctly on both sides

View answer

119. If the declination of the needle is 10° W

1. Each of the whole circle reckoning has to be micros by 10°
2. In the quadrantal method, the correction is positive in the 1st and 3rd quadrants
3. In the quadrantal method, the corrections is negative in 2nd and 4th quadrants
4. All the above

View answer

120. If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant

1. 0.1
2. 0.4
3. 0.6
4. 1.33

View answer