Practice Test: Question Set - 18
1. The distance between steps for measuring downhill to obtain better accuracy
- (A) Decreases
with decrease of slope
- (B) Increases
with increase of slope
- (C) Decreases
with increase of slope
- (D) Decreases
with decrease of weight of the chain
2. The boundary of water of a still lake represents
- (A) Level
surface
- (B) Horizontal
surface
- (C) Contour line
- (D) A concave
surface
3. The 10 mm markings on a levelling staff placed at 20 m are separated by
- (A) 1/1000
radian
- (B) 1/1500
radian
- (C) 1/2000
radian
- (D) 1/2500
radian
4. The sensitiveness of a level tube decreases if
- (A) Radius of
curvature of its inner surface is increased
- (B) Diameter of
the tube is increased
- (C) Length of
the vapour bubble is increased
- (D) Both
viscosity and surface tension are increased
5. The orthographical projection of a traverse leg upon the reference meridian, is known as
- (A) Departure of
leg
- (B) Latitude to
the leg
- (C) Co-ordinate
of the leg
- (D) Bearing
of the leg
6. The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in
- (A) Chain
surveying
- (B) Traverse
method of surveys
- (C) Triangulation
- (D) None of
these
7. The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as
- (A) Chromatic
aberration
- (B) Spherical
aberration
- (C) Astigmatism
- (D) Coma
8. A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to
- (A) Cumulative,
+ 0.11 m
- (B) Compensating,
± 0.11 m
- (C) Cumulative,
- 0.11 m
- (D) None of
these
9. Systematic errors are those errors
- (A) Which cannot
be recognised
- (B) Whose
character is understood
- (C) Whose
effects are cumulative and can be eliminated
- (D) None of
these
10. A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be
- (A) 1.435
- (B) 1.345
- (C) 1.425
- (D) None of
these
11. A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads
- (A) Azimuth
of the forward line
- (B) Bearing of
the forward line
- (C) Back
bearing of the forward line
- (D) Equal to
360°-azimuth of the forward line
12. Two hill tops ‘A’ and ‘B’ 20 km apart are intervened by a third top ‘C’. If the top most contour of the three hill tops are of the same value, state whether the line of sight AB
- (A) Passes clear
of hill top C
- (B) Passes below
the hill top C
- (C) Grazes the
hill top C
- (D) None of
these
13. The bearings of two traverse legs AB and BC are N52° 45' E and N34° 30' E respectively. The deflection angle is
- (A) 18° 15' E
- (B) 18° 15' N
- (C) 18° 15' W
- (D) 18° 15' L
14. In a theodolite
- (A) The
telescope axis is perpendicular to transit axis
- (B) The axis of
rotation is perpendicular to transit axis
- (C) The
telescope axis, the transit axis and the rotation axis pass through the centre
of theodolite
- (D) All the
above
15. For taking offsets with an optical square on the right hand side of the chain line, it is held
- (A) By right
hand upside down
- (B) By left hand
upright
- (C) By right
hand upright
- (D) By left hand
upside down
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