A. 20°
B. 30°
C. 45°
D. 60°
Related Mcqs:
- The angle of intersection of the two plane mirrors of an optical square is______________?
A. 30°
B. 45°
C. 60°
D. 90° - The horizontal angle between the true meridian and magnetic meridian at a place is called______________?
A. azimuth
B. declination
C. local attraction
D. magnetic bearing - Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?
A. error due to eccentricity of verniers
B. error due to displacement of station signals
C. error due to wrong adjustment of line of collimation and trunnion axis
D. error due to inaccurate graduation - The angle between the prolongation of the preceding line and the forward line of a traverse is called ________________?
A. deflection angle
B. included angle
C. direct angle
D. none of the above - Which of the following methods of offsets involves less measurement on the ground?
A. method of perpendicular offsets
B. method of oblique offsets
C. method of ties
D. all involve equal measurement on the ground - Which of the following is not used in measuring perpendicular offsets ?
A. line ranger
B. steel tape
C. optical square
D. cross staff - A telescope is said to be inverted if its______________?
A. vertical circle is to its right and the bubble of the telescope is down
B. vertical circle is to its right and the bubble of the telescope is up
C. vertical circle is to its left and the bubble of the telescope is down
D. vertical circle is to its left and the bubble of the telescope is up - In the double application of principle of reversion, the apparent error is_______________?
A. equal to true error
B. half the true error
C. two times the true error
D. four times the true error - Sensitiveness of a level tube is designated by______________?
A. radius of level tube
B. length of level tube
C. length of bubble of level tube
D. none of the above - If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is________________?
A. 7.5 m
B. 25 m
C. 50
D. 75 m