The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every
-
100 sq. km of area -
150 sq. km of area -
200 sq. km of area -
none of these.
If the rate of gain of radial acceleration is 0.3 m per sec3 and full centrifugal ratio is developed. On the curve the ratio of the length of the transition curve of same radius on road and railway, is
-
2.828 -
3.828 -
1.828 -
0.828.
In optical reading instruments
-
the vertical circle is usually continuous from 0° to 359° -
the readings increase when the telescope is elevated in the face left position -
the readings decrease when the telescope is elevated in the face right position -
all the above.
The systematic errors which persist and have regular effects in the performance of a survey operation, are due to
-
carelessness -
faulty instrument -
inattention -
none of these.
The angle between two plane mirrors of optical square, is
-
20° -
30° -
45° -
60° -
90°.
For setting out a simple curve, using two theodolites.
-
offsets from tangents are required -
offsets from chord produced are required -
offsets from long chord are required -
deflection angles from Rankine's formula are required -
none of these.
Metric chains are generally available in
-
10 m and 20 m length -
15 m and 20 m length -
20 m and 30 m length -
25 m and 100 m length
The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known
-
balancing the sights -
balancing the departures -
balancing the latitudes -
balancing the traverse.
Pick up the correct statement from the following :
-
the power of a lens is the reciprocal of its focal length -
the unit of power of the lens is diopter -
the power of two or more thin lenses in contact is the power of the combination of the lenses -
all the above.
The diaphragm of a stadia theodolite is fitted with two additional
-
horizontal hairs -
vertical hairs -
horizontal and two vertical hairs -
none of these.
The latitude of a traverse leg is obtained by multiplying its length by
-
tangent of its reduced bearing -
sign of its reduced bearing -
cosine of its reduced bearing -
cosecant of its reduced bearing.
Geodetic surveying is undertaken
-
for production of accurate maps of wide areas -
for developing the science of geodesy -
making use of most accurate instruments and methods of observation -
for determination of accurate positions on the earth's surface of system of control points -
all the above.
On a diagonal scale, it is possible to read up to
-
one dimension -
two dimensions -
three dimensions -
four dimensions.
Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves
-
embankment on the centre line -
excavation on the centre line -
earth work on the centre line -
none of these.
Centering error of a theodolite produces an error
-
in all angles equally -
which does not vary with the direction or pointing -
which varies with the direction of pointing and inversely with the length of sight -
none of these.
Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves
-
embankment on the centre line -
excavation on the centre line -
earth work on the centre line -
none of these.
True meridian of different places
-
converge from the south pole to the north pole -
converge from the north pole to the south pole -
converge from the equator to the poles -
run parallel to each other.
True meridian of different places
-
converge from the south pole to the north pole -
converge from the north pole to the south pole -
converge from the equator to the poles -
run parallel to each other.
The best method of interpolation of contours, is by
-
estimation -
graphical means -
computation -
all of these.
For a curve of radiusm and normal chordm, the Rankine's deflection angle, is
-
0°25'.95 -
0°35'.95 -
1°25'.53 -
1°35'.95 -
2°51'.53.
The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be
-
13.75 m -
3.44 m -
1375 m -
none of these.
Plotting of inaccessible points on a plane table, is done by
-
intersection -
traversing -
radiation -
none of these.
Measuring with am chain, 0.m too short, introduces
-
positive compensating error -
negative compensating error -
positive cumulative error -
negative cumulative error.
Orientation of a plane table by solving two point problem is only adopted when
-
saving of time is a main factor -
better accuracy is a main factor -
given points are inaccessible -
none of these.
The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known
-
declination -
azimuth -
dip -
bearing.
Pick up the correct specification of Ramsden eyepiece from the following :
-
it consists of two equal piano convex lenses -
the curved surfaces of plano-convex lenses face each other -
the two lenses are separated by a distance equal to 2/3 of the focal length of either lens. -
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 -
all the above.
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 ism, the error is approximately equal to
-
cumulative, + 0.11 m -
compensating, ± 0.11 m -
cumulative, - 0.11 m -
none of these
A dumpy level was set up at the midpoint between two pegs A and B,m apart and the staff readings at A and B were 1.and 1.With the level set up a A, the readings at A and B were 1.and 1.The collimation error perm length of sight is
-
0.02 m inclined upwards -
0.04 m inclined downwards -
0.04 m inclined upward -
none of these.
A dumpy level is set up with its eye-piece vertically over a peg A. The height from the top of peg A to the centre of the eye-piece is 1.m and the reading on peg B is 0.m. The level is then setup over B. The height of the eye-piece above peg B is 1.m and a reading on A is 2.m. The difference in level between A and B is
-
2.900 m -
3.030 m -
0.770 m -
0.785 m -
1.770 m.
Setting out a curve by two theodolite method, involves
-
linear measurements only -
angular measurements only -
both linear and angular measurements -
none of these.
A back sight
-
is always taken on a point of known elevation or can be computed -
is added to the known level to obtain the instrument height -
taken on an inverted staff is treated as negative -
all the above.
A relatively fixed point of known elevation above datum, is called
-
bench mark -
datum point -
reduced level -
reference point.
Pick up the correct statement from the following :
-
the length of the brass handle is included in the length of chain -
the handles are on swivel joints to prevent twisting of the chain -
the fifth tag from either end of the chain is numbered 5 -
the length of the Gunter's chain is 66 ft. -
all the above.
Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed
(where k is in kilometers.)
-
± 0.1 k mm -
± 0.2 k mm -
± 0.1 k -
0.2 k mm.
When the bubble of the level tube of a level, remains central
-
line of sight is horizontal -
axis of the telescope is horizontal -
line of collimation is horizontal -
geometrical axis of the telescope is horizontal.
Cross hairs in surveying telescopes, are fitted
-
in the objective glass -
at the centre of the telescope -
at the optical centre of the eye piece -
in front of the eye piece.
Pick up the correct statement from the following :
-
in astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce a real inverted image in front of the eye piece -
in Galileo's telescope, the rays from the object get refracted at the objective and are intercepted by the eyepiece before a real image is formed -
a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight -
the line of sight which passes through the intersection of cross-lines marked on a diaphragm fixed in front of the eyepiece in a plane at right-angles to the axis, is called the line of collimation -
all the above.
Two hill tops A and Bkm 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
-
passes clear of hill top C -
passes below the hill top C -
grazes the hill top C -
none of these.
Pick up the correct statement from the following :
-
in astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce a real inverted image in front of the eye piece -
in Galileo's telescope, the rays from the object get refracted at the objective and are intercepted by the eyepiece before a real image is formed -
a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight -
the line of sight which passes through the intersection of cross-lines marked on a diaphragm fixed in front of the eyepiece in a plane at right-angles to the axis, is called the line of collimation -
all the above.
Pick up the correct specification of Ramsden eyepiece from the following :
-
it consists of two equal piano convex lenses -
the curved surfaces of plano-convex lenses face each other -
the two lenses are separated by a distance equal to 2/3 of the focal length of either lens. -
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 -
all the above.
If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is
-
-
-
-
-
none of the above
Cross hairs in surveying telescopes, are fitted
-
in the objective glass -
at the centre of the telescope -
at the optical centre of the eye piece -
in front of the eye piece.
Two hill tops A and Bkm 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
-
passes clear of hill top C -
passes below the hill top C -
grazes the hill top C -
none of these.
If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is
-
-
-
-
-
none of the above
An ideal transition curve is
-
cubic parabola -
cubic spiral -
clothoid spiral -
true spiral.
The direction of steepest slope on a contour, is
-
along the contour -
at an angle of 45° to the contour -
at right angles to the contour -
none of these.
If α is the angle between the polar ray and the tangent at the point of commencement of a lemniscate curve, the equation of the curve, is
-
l = ksin α -
l = ksin 2α -
l = ksin 3α -
l = ktan 2α -
l = kcos 2α
In case of reduction of levels by the height of instrument method,
-
∑ B.S. - ∑ F.S. = difference in R.L.S of the first station and last station -
∑ (R.L. + I + F.S.) - first R.L = ∑ (H.I. + No. of R.L.s.) -
both (a) and (b) above -
neither (a) nor (b).
Pick up the correct statement from the following :
-
in the earth's magnetic field, a magnetic needle rests in magnetic meridian -
the angle between the true meridian and the magnetic meridian is called magnetic variation -
one end of the magnetic needle supported at its centre of gravity tends to dip down towards the. nearer magnetic pole of the earth -
the magnet properly pivoted is balanced by means of riding weight movable along the needle -
all the above.
A traverse deflection angle is
-
less than 90° -
more than 90° but less than 180° -
the difference between the included angle and 180° -
the difference between 360° and the included angle.