DGMS SURVEYORS RESTRICTED COAL DEC 2021
SURVEYORS RESTRICTED COAL EXAM DEC 2021
1) The surface of zero elevation around the earth, which is slightly irregular and curved is known as ____
a) horizontal surface
b) level surface
c) geold surface
d) elliptic surface
e) mean sea level
2) The correction for Sag is
a) always additive
b) always subtractive
c) always zero
d) sometime additive sometime subtractive
e) none of the above
3) The curve composed of two arcs of different radii having their centers on the opposite side of the curve is known
a) A simple curve
b) A compound curve
c) A reverse curve
d) A vertical curve
e) None of the above
4) Analytic lens is an additional convex lens filted in the external focusing telescope between the object glass and the eye-place to eliminate _____
a) Multiplying constant
b) Additive constant
c) Magnifying constant
d) Standard deduction
e) None of the above
5) The ____________ is the intersection of a vertical line through the observer’ station with the upper portion of the celestial sphere.
a) Nadir (N)
b) Celestial horizon
c) Zenith (Z)
d) Prime vertical
e) Visible horizon
6) No working shall be extended within …………… of waterbody
a) 60m
b) 75m
c) 120m
d) 90m
e) 100m
7) A very fine slow motion for making the final setting to a theodolite is given using the _____
a) Tangent screw
b) Captain screw
c) Clamping screw
d) Foot screw
e) None of the above
8) The longitudinal section of the surface of bubble tube is :-
a) straight
b) circular
c) paraholic
d) elliptic
e) none of these
9) Which of the following is not a temporary adjustment of Theodelite?
a) Elimination of parallax
b) Centering the instrument
c) Leveling the instrument
d) Collimation adjustment
e) All the above
10) Imaginary line passing through points having equal magnetic declination is termed as
a) Isogon
b) Agencic
c) Isoclinic
d) Isopachyte
e) None of these
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