SURVEYING MCQS SET 02

SURVEYING MCQS SET 02

1. One of the Lehmann's rules of plane tabling, is
A. location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
B. when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray
C. when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays
D. none of these.
Answer: Option A
 

2.  If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good
A. f = f1 + f2
B.     f = ½ (f1 + f2)
C.     1/f = 1/f1 +1/f2
D.     none of these.
Answer: Option C
 

3. The accuracy of measurement in chain surveying, does not depend upon
A. length of the offset
B. scale of the plotting
C. importance of the features
D. general layout of the chain lines.
Answer: Option D
 

4. The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be
A. 13.75 m
B. 3.44 m
C. 1375 m
D. none of these.
Answer: Option A
 

5. Closed contours of decreasing values towards their centre, represent
A. a hill
B. a depression
C. a saddle or pass
D. a river bed.
Answer: Option B
 

6.  A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is
A. 0.02 m inclined upwards
B. 0.04 m inclined downwards
C. 0.04 m inclined upward
D. none of these.
Answer: Option B
 

7. Diopter is the power of a lens having a focal length of
A. 25 cm
B. 50 cm
C. 75 cm
D. 100 cm
E. 125 cm
Answer: Option D
 

8. An imaginary line joining the points of equal elevation on the surface of the earth, represents
A. contour surface
B. contour gradient
C. contour line
D. level line
E. none of these.
Answer: Option C
 

9. The 'fix' of a plane table station with three known points, is bad if the plane table station lies
A. in the great triangle
B. outside the great triangle
C. on the circumference of the circumscribing circle
D. none of these.
Answer: Option C
 

10. If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is
A. (R - S) tan θ/2 - L/2
B. (R + S) tan θ/2 - L/2
C. (R + S) tan θ/2 + L/2
D. (R - S) tan θ/2 + L/2
E. (R - S) cos θ/2 + L/2
Answer: Option C