Online Surveying Practice and Preparation Tests - Set 26 - ObjectiveBooks

# Practice Test: Question Set - 26

1. Pick up the correct statement from the following:
(A) The power of a lens is the reciprocal of its focal length
(B) The unit of power of the lens is Diopter
(C) The power of two or more thin lenses in contact is the power of the combination of the lenses
(D) All the above

2. Pick up the correct statement from the following:
(A) A level surface is perpendicular at all points to the direction of gravity
(B) A level line lies in level surface
(C) A horizontal surface is normal to the direction of gravity at only one point
(D) All the above

3. Designation of a curve is made by:
(A) Angle subtended by a chord of any length
(B) Angle subtended by an arc of specified length
(D) Curvature of the curve

4. In chain surveying tie lines are primarily provided
(A) To check the accuracy of the survey
(B) To take offsets for detail survey
(C) To avoid long offsets from chain lines
(D) To increase the number of chain lines

5. The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is
(A) 5 mm
(B) 10 mm
(C) 15 mm
(D) 20 mm

6. An internal focussing type surveying telescope, may be focussed by the movement of
(A) Objective glass of the telescope
(B) Convex-lens in the telescope
(C) Concave lens in the telescope
(D) Plano-convex lens in the telescope

7. True meridians are generally preferred to magnetic meridians because
(A) These converge to a point
(B) These change due to change in time
(C) These remain constant
(D) None of these

8. The total change in level along the line is equal to total back sights
(A) Minus total fore sights
(B) The total rises minus total falls
(C) The reduced level of last point minus reduced level of the first point
(D) All the above

9. The magnetic bearing of a line is 32° and the magnetic declination is 10° 15' W. The true bearing is
(A) 21° 45'
(B) 42° 15'
(C) 42° 15' W
(D) 21° 45' W

10. If the angular measurements of a traverse are more precise than its linear measurements, balancing of the traverse, is done by
(A) Bowditch's rule
(B) Transit rule
(C) Empirical rule
(D) All of the above

11. While measuring with a metallic tape of 30 m length pull should be applied
(A) 1 kg
(B) 2 kg
(C) 3 kg
(D) 4 kg

12. If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by
(A) Taking short legs
(B) Making repeated observations of angular and linear measurements
(C) Making a subsidiary traverse to determine the length of a long leg
(D) All the above

13. Pick up the correct specification of Ramsden eyepiece from the following:
(A) It consists of two equal piano convex lenses
(B) The curved surfaces of Plano-convex lenses face each other
(C) The distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam
(D) All the above

14. The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is
(A) Reciprocal levelling
(B) Precise levelling
(C) Differential levelling
(D) Flying levelling

15. Diaphragm of a surveying telescope is held inside
(A) Eye-piece
(B) Objective
(C) Telescope tube at its mid point
(D) Telescope at the end nearer the eye-piece

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