Theory and Practice Terms
B.true bearing
A bearing of a line is also known as A.magnetic bearing B.true bearing C.azimuth D.reduced bearing
B.0.04 m inclined downwards
A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is A.0.02 m inclined upwards B.0.04 m inclined downwards C.0.04 m inclined upward D.none of these.
A.cumulative, + 0.11 m
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
C.210°
ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is A.90° B.120° C.210° D.270°
C.not reliable
Accuracy of 'fix' by two point problem, is A.bad B.good C.not reliable D.unique.
C.clothoid spiral
An ideal transition curve is A.cubic parabola B.cubic spiral C.clothoid spiral D.true spiral.
B.parabolic
An ideal vertical curve to join two gradients, is A.circular B.parabolic C.elliptical D.hyperbolic E.none of these.
C.contour line
An imaginary line joining the points of equal elevation on the surface of the earth, represents A.contour surface B.contour gradient C.contour line D.level line E.none of these
B.a depression
Closed contours of decreasing values towards their centre, represent A.a hill B.a depression C.a saddle or pass D.a river bed.
D.100 cm
Diopter is the power of a lens having a focal length of A.25 cm B.50 cm C.75 cm D.100 cm E.125 cm
E.all the above.
For a closed traverse the omitted measurements may be calculated A.length of one side only B.bearing of one side only C.both length and bearing of one side D.length or bearing of adjacent side E.all the above.
E.2°51'.53.
For a curve of radius 100 m and normal chord 10 m, the Rankine's deflection angle, is A.0°25'.95 B.0°35'.95 C.1°25'.53 D.1°35'.95 E.2°51'.53.
E.none of these.
For setting out a simple curve, using two theodolites. A.offsets from tangents are required B.offsets from chord produced are required C.offsets from long chord are required D.deflection angles from Rankine's formula are required E.none of these.
C.both longitudinal and cross sections are required
For the construction of highway (or railway) A.longitudinal sections are required B.cross sections are required C.both longitudinal and cross sections are required D.none of these.
B.at the exact mid point of A and B
For true difference in elevations between two points A and B, the level must be set up A.at any point between A and B B.at the exact mid point of A and B C.near the point A D.near the point B.
E.all the above.
Geodetic surveying is undertaken A.for production of accurate maps of wide areas B.for developing the science of geodesy C.making use of most accurate instruments and methods of observation D.for determination of accurate positions on the earth's surface of system of control points E.all the above.
A.large water bodies
Hydrographic surveys deal with the mapping of A.large water bodies B.heavenly bodies C.mountaineous region D.canal system E.movement of clouds.
D. ΔDx(l/P)
If P is the perimeter of a closed traverse, ΔD is the closing error in departure, the correction for the departure of a traverse side of length l, according to Bowditch rule, is A. ΔDx(P/l) B. ΔDx(l^2/P) C. Px(l/ΔD) D. ΔDx(l/P)
C.(R + S) tan θ/2 + L/2
If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is A.(R - S) tan θ/2 - L/2 B.(R + S) tan θ/2 - L/2 C.(R + S) tan θ/2 + L/2 D.(R - S) tan θ/2 + L/2 E.(R - S) cos θ/2 + L/2
E.1718.9 S/R.
If S is the length of a subchord and R is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to A.573 S/R B.573 R/S C.171.9 S/R D.1718.9 R/S E.1718.9 S/R.
A. d^2/60 m
If a 30 m chain diverges through a perpendicular distance d from its correct alignment, the error in length, is A. d^2/60 m B. d^2/30 m C. d^2/40 m D. d/30 m E.. d/20 m
A. lx(dx/∑Lat)
If arithmetic sum of latitudes of a closed traverse is ∑Lat and closing error in latitude is dx, the correction for a side whose latitude is l, as given by Transit Rule, is A. lx(dx/∑Lat) B.lx(∑Lat/dx) C.∑Latx(dx /l) D.none of these.
C. 1/f = 1/f1+1/f2
If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good A. f = f1 + f2 B. f = (f1 + f2) C. 1/f = 1/f1+1/f2 D.none of these.
D. 3 meters
If h is the difference in level between end points separated by l, then the slope correction is . The second term may be neglected if the value of h in a 20 m distance is less than A. 1/2 meters B. 1 meters C. 2 meters D. 3 meters
B.Transit rule
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.
C.R/20
If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed. A.R/10 B.R/15 C.R/20 D.R/25.
A.2.828
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 A.2.828 B.3.828 C.1.828 D.0.828.
A.2l sin2 θ/2
If θ is the slope of the ground and l is the measured distance, the correction is A.2l sin2 θ/2 B.2l cos2 θ/2 C.2l tan2 θ/2 D.2l cot2 θ/2.
A. E = 1-cos(Ѳ±δ)/cosѲ
If θ is the vertical angle of an inclined sight, δ is the angle of tilt of the staff, the error A. E = 1-cos(Ѳ±δ)/cosѲ B. E = 1-sin(Ѳ±δ)/sinѲ C. E = 1-tan(Ѳ±δ)/tanѲ D. none of these.
A.linear measurements only
In chain surveying field work is limited to A.linear measurements only B.angular measurements only C.both linear and angular measurements D.all the above.
C.to avoid long offsets from chain lines
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.
C.both (a) and (b)
In levelling operation A.when the instrument is being shifted, the staff must not be moved B.when the staff is being carried forward, the instrument must remain stationary C.both (a) and (b) D.neither (a) nor (b).
D.all the above.
In optical reading instruments A.the vertical circle is usually continuous from 0° to 359° B.the readings increase when the telescope is elevated in the face left position C.the readings decrease when the telescope is elevated in the face right position D.all the above.
C.changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by A.adding 180°, if the given bearing is less than 180° B.subtracting 180°, if the given bearing, is more than 180° C.changing the cardinal points, i.e. substituting N for S and E for W and vice-versa D.none of these.
C.45 m
Keeping the instrument height as 1 m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than A.25 cm B.20 m C.45 m D.10 m
B.25 m
Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than A.30 m B.25 m C.20 m D.15 m
B.28.28 m
Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to A.14.14 B.28.28 m C.200 m D.none of these.
A.location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances.
One of the Lehmann's rules of plane tabling, is A.location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances B.when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray C.when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays D.none of these.
B.multiplying constant
One of the tacheometric constants is additive, the other constant, is A.subtractive constant B.multiplying constant C.dividing constant D.indicative constant.
C.enlarging or reducing plans
Pantagraph is used for A.measuring distances B.measuring areas C.enlarging or reducing plans D.setting out right angles
E.All the above.
Pick up the correct statement from the following : A.Box sextant is used for the measurement of horizontal angles B.Cross staff is used for setting out right angles C.Gradiometer is used for setting out any required gradient D.Line ranger is used for locating intermediate stations on a survey line E.All the above.
D.all the above.
Pick up the correct statement from the following : A.the apparent error on reversal is twice the actual error B.the correction may be made equal to half the observed discrepancy. C.the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results D.all the above.
A.the eyepiece plays no part in defining the line of sight
Pick up the correct statement from the following : A.the eyepiece plays no part in defining the line of sight B.the diaphragm plays no part in defining the line of sight C.the optical centre of the objective plays no part in defining the line of sight D.none of these.
D. all the above.
Pick up the correct statement from the following : A.the tangent screw enables to give small movement under conditions of smooth and positive control B.standing on the tripod is the levelling head or trib arch C.the levelling screws are used to tilt the instrument so that its rotation axis is truly vertical D.all the above.
D.all the above.
Pick up the correct statement from the following: A.the theodolite in which telescope can be rotated in vertical plane is called a transit B.when the vertical circle is to the left of the telescope during observation, it is called to be in left face C.when the vertical circle is to the right of the telescope during observation, it is called to be in right face D.all the above.
C.plan table surveying
Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following A.chain surveying B.compass surveying C.plan table surveying D.tacheometric surveying.
C.on the circumference of the circumscribing circle
The 'fix' of a plane table station with three known points, is bad if the plane table station lies A.in the great triangle B.outside the great triangle C.on the circumference of the circumscribing circle D.none of these.
D.general layout of the chain lines.
The accuracy of measurement in chain surveying, does not depend upon A.length of the offset B.scale of the plotting C.importance of the features D.general layout of the chain lines.
C.45°
The angle between two plane mirrors of optical square, is A.20° B.30° C.45° D.60° E.90°
A.102°
The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is A.102° B.78° C.45° D.none of these.
D.all the above.
The branch of surveying in which both horizontal and vertical positions of a point, are determined by making instrumental observations, is known A.tacheometry B.tachemetry C.telemetry D.all the above.
A.13.75 m
The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be A.13.75 m B.3.44 m C.1375 m D.none of these.
B.twice the distance between the zero of graduation and the foot of the staff
The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to A.the distance between the zero of gradient and the foot of the staff B.twice the distance between the zero of graduation and the foot of the staff C.thrice the distance between the zero of graduation and the foot of the staff D.none of the above.
B. is minimum if the staff is held truly normal to the line of sight.
The intercept of a staff A.is maximum if the staff is held truly normal to the line of sight. B.is minimum if the staff is held truly normal to the line of sight. C.decreases if the staff is tilted away from normal D.increases if the staff is tilted towards normal.
C.cosine of its reduced bearing
The latitude of a traverse leg is obtained by multiplying its length by A.tangent of its reduced bearing B.sign of its reduced bearing C.cosine of its reduced bearing D.cosecant of its reduced bearing.
D.indefinite features to be surveyed.
The limiting length of an offset does not depend upon A.accuracy of the work B.method of setting out perpendiculars C.scale of plotting D.indefinite features to be surveyed.
B.from whole to the part
The main principle of surveying is to work A.from part to the whole B.from whole to the part C.from higher level to the lower level D.from lower level to higher level.
B.by independent co-ordinates of each station
The most reliable method of plotting a theodolite traverse, is A.by consecutive co-ordinates of each station B.by independent co-ordinates of each station C.by plotting included angles and scaling off each traverse leg D.by the tangent method of plotting.
A. 1/2*r *squareroot of n
The probable error of the adjusted bearing at the middle is A. 1/2*r *squareroot of n B. 1/3*r *squareroot of n C. 1/4*r *squareroot of n D. 1/5*r *squareroot of n
D.100 m
The radius of curvature of the arc of the bubble tube is generally kept A.10 m B.25 m C.50 m D.100 m
A.in the plane of cross hairs
The real image of an object formed by the objective, must lie A.in the plane of cross hairs B.at the centre of the telescope C.at the optical centre of the eye-piece D.anywhere inside the telescope.
D.both viscosity and surface tension are increased
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.
A.3.75 cm
The slope correction for a length of 30 m along a gradient of 1 in 20, is A.3.75 cm B.0.375 cm C.37.5 cm D.2.75 cm.
C.converge from the equator to the poles
True meridian of different places A.converge from the south pole to the north pole B.converge from the north pole to the south pole C.converge from the equator to the poles D.run parallel to each other.
C.these remain constant
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.
C.30 cm
Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is A.10 cm B.20 cm C.30 cm D.40 cm
C.said to have parallax
While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is A.correctly focussed B.not correctly focussed C.said to have parallax D.free from parallax.
