Surveying ctto
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 Answer: Option A
(A) 13.75 m
The line of collimation method of reduction of levels, does not provide a check on (A) Intermediate sights (B) Fore sights (C) Back sights (D) Reduced levels
(A) Intermediate sights
Contour interval is (A) Inversely proportional to the scale of the map (B) Directly proportional to the flatness of ground (C) Larger for accurate works (D) Larger if the time available is more
(A) Inversely proportional to the scale of the map
Detailed plotting is generally done by (A) Radiation (B) Traversing (C) Resection (D) All of the above
(A) Radiation
Contour interval is (A) The vertical distance between two consecutive contours (B) The horizontal distance between two consecutive contours (C) The vertical distance between two points on same contour (D) The horizontal distance between two points on same contour
(A) The vertical distance between two consecutive contours
If is the stadia distance, is the focal length and is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is (A) f/i (B) i/f (C) (f + d) (D) f/d
(A) f/i
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are (i) Levelling (ii) Orientation (iii) Centering The correct sequence of these operations is (A) (i), (ii), (iii) (B) (i), (iii), (ii) (C) (iii), (i), (ii) (D) (ii), (iii), (i)
(B) (i), (iii), (ii)
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
D. 100 cm
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
D. 100 m
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 m B. 1 m C. 2 m D. 3 m
D. 3 m
A back sight A. is always taken on a point of known elevation or can be computed B. is added to the known level to obtain the instrument height C. taken on an inverted staff is treated as negative D. all the above.
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.
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.
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 transmit 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.
D. all the above.
The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known A. balancing the sights B. balancing the departures C. balancing the latitudes D. balancing the traverse.
D. balancing the traverse.
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.
D. both viscosity and surface tension are increased.
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.
D. general layout of the chain lines.
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.
D. indefinite features to be surveyed.
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.
E. 1718.9 S/R.
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. 2°51'.53.
Different grades are joined together by a (A) Compound curve (B) Transition curve (C) Reverse curve (D) Vertical curve
(D) Vertical curve
An ideal vertical curve to join two gradients, is A. circular B. parabolic C. elliptical D. hyperbolic E. none of these.
B. parabolic
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be (A) +50 m, +86.6 m (B) +86.6 m, -50 m (C) +50 m, -86.6 m (D) +70.7 m, -50 m
(B) +86.6 m, -50 m
The size of a plane table is (A) 750 mm × 900 mm (B) 600 mm × 750 mm (C) 450 mm × 600 mm (D) 300 mm × 450 mm
(B) 600 mm × 750 mm
Pick up the incorrect statement from the following: (A) While measuring a distance with a tape of length 100.005 m, the distance to be increasing by 0.005 m for each tape length (B) An increase in temperature causes a tape to increase in length and the measured distance is too large (C) The straight distance between end points of a suspended tape is reduced by an amount called the sag correction (D) A 100 m tape of cross section 10 mm × 0.25 mm stretches about 10 mm under 5 kg pull
(B) An increase in temperature causes a tape to increase in length and the measured distance is too large
The line normal to the plumb line is known as (A) Horizontal line (B) Level line (C) Datum line (D) Vertical line
(B) Level line
Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations? (A) Measuring angle and distance from one transit station (B) Measuring angles to the point from at least two stations (C) Measuring angle at one station and distance from other (D) Measuring distance from two points on traverse line
(B) Measuring angles to the point from at least two stations
The chord of a curve less than peg interval, is known as (A) Small chord (B) Sub-chord (C) Normal chord (D) Short chord
(B) Sub-chord
The smaller horizontal angle between the true meridian and a survey line, is known (A) Declination (B) Bearing (C) Azimuth (D) Dip
(C) Azimuth
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)
(C) Both (a) and (b)
The method of reversal (A) Is usually directed to examine whether a certain part is truly parallel or perpendicular to another (B) Makes the erroneous relationship between parts evident (C) Both (a) and (b) (D) Neither (a) nor (b)
(C) Both (a) and (b)
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
(C) Both longitudinal and cross sections are required
Subtense bar is an instrument used for (A) Levelling (B) Measurement of horizontal distances in plane areas (C) Measurement of horizontal distances in undulated areas (D) Measurement of angles
(C) Measurement of horizontal distances in undulated areas
If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as (A) Direct vernier (B) Double vernier (C) Retrograde vernier (D) Simple vernier
(C) Retrograde vernier
The Random errors tend to accumulate proportionally to (A) Numbers of operations involved (B) Reciprocal of operations involved (C) Square root of the number of operation involved (D) Cube root of the number of operation involved
(C) Square root of the number of operation involved
To avoid large centering error with very short legs, observations are generally made (A) To chain pins (B) By using optical system for centering the theodolite (C) To a target fixed on theodolite tripod on which theodolite may be fitted easily (D) All the above
(C) To a target fixed on theodolite tripod on which theodolite may be fitted easily
Check lines (or proof lines) in Chain Surveying, are essentially required (A) To plot the chain lines (B) To plot the offsets (C) To indicate the accuracy of the survey work (D) To increase the out-turn
(C) To indicate the accuracy of the survey work
Pick up the correct statement from the following: (A) The directions of plumb lines suspended at different points in a survey are not strictly parallel (B) In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal (C) In surveys of large extent, the effect of curvature of the earth must be considered (D) All the above
(D) All the above
There are two stations A and B. Which of the following statements is correct? (A) The fore bearing of AB is AB (B) The back bearing of AB is BA (C) The fore and back bearings of AB differ by 180° (D) All the above
(D) All the above
Volume of the earth work may be calculated by (A) Mean areas (B) End areas (C) Trapezoidal (D) All the above
(D) All the above
In levelling operation (A) If second reading is more than first, it represents a rise (B) If first reading is more than second, it represents a rise (C) If first reading is less than second, it represents a fall (D) Both (b) and (c)
(D) Both (b) and (c)
The line of sight is kept as high above ground surface as possible to minimise the error in the observed angles due to (A) Shimmering (B) Horizontal refraction (C) Vertical refraction (D) Both shimmering and horizontal refraction
(D) Both shimmering and horizontal refraction
The two point problem and three point problem are methods of (A) Resection (B) Orientation (C) Traversing (D) Resection and orientation
(D) Resection and orientation
Which of the following methods of contouring is most suitable for a hilly terrain? (A) Direct method (B) Square method (C) Cross-sections method (D) Tachometric method
(D) Tachometric method
Ramsden eye-piece consists of (A) Two convex lenses short distance apart (B) Two concave lenses short distance apart (C) One convex lens and one concave lens short distance apart (D) Two Plano-convex lenses short distance apart, with the convex surfaces facing each other
(D) Two Plano-convex lenses short distance apart, with the convex surfaces facing each other
In direct method of contouring, the process of locating or identifying points lying on a contour is called (A) Ranging (B) Centring (C) Horizontal control (D) Vertical control
(D) Vertical control
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.
A. 102°
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.
A. 13.75 m
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. 2.828
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. 2l sin2 θ/2
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
A. 3.75 cm
A relatively fixed point of known elevation above datum, is called A. bench mark B. datum point C. reduced level D. reference point.
A. bench mark
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
A. cumulative, + 0.11 m
The diaphragm of a stadia theodolite is fitted with two additional A. horizontal hairs B. vertical hairs C. horizontal and two vertical hairs D. none of these.
A. horizontal 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.
A. in the plane of cross hairs
Hydrographic surveys deal with the mapping of A. large water bodies B. heavenly bodies C. mountaineous region D. canal system E. movement of clouds.
A. large water bodies
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.
A. linear measurements only
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.
A. location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances
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.
B. 0.04 m inclined downwards
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. 25 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.
B. 28.28 m
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.
B. Transit rule
Closed contours of decreasing values towards their centre, represent A. a hill B. a depression C. a saddle or pass D. a river bed.
B. a depression
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.
B. at the exact mid point of A and B
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.
B. by independent co-ordinates of each station
The systematic errors which persist and have regular effects in the performance of a survey operation, are due to A. carelessness B. faulty instrument C. inattention D. none of these.
B. faulty instrument
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. from whole to the part
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.
B. is minimum if the staff is held truly normal to the line of sight.
One of the tacheometric constants is additive, the other constant, is A. subtractive constant B. multiplying constant C. dividing constant D. indicative constant
B. multiplying constant
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.
B. passes below the hill top C
A bearing of a line is also known as A. magnetic bearing B. true bearing C. azimuth D. reduced bearing
B. true bearing
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. twice the distance between the zero of graduation and the foot of the staff
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
C. (R + S) tan θ/2 + L/2
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 A. 100 sq. km of area B. 150 sq. km of area C. 200 sq. km of area D. none of these.
C. 200 sq. km of area
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. 210°
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. 30 cm
Keeping the instrument height as 1 and 1/2 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
C. 45 m
The angle between two plane mirrors of optical square, is A. 20° B. 30° C. 45° D. 60° E. 90°.
C. 45°
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.
C. R/20
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. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
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.
C. contour line
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. converge from the equator to the poles
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.
C. cosine of its reduced bearing
Pantagraph is used for A. measuring distances B. measuring areas C. enlarging or reducing plans D. setting out right angles
C. enlarging or reducing plans
Orientation of a plane table by solving two point problem is only adopted when A. saving of time is a main factor B. better accuracy is a main factor C. given points are inaccessible D. none of these.
C. given points are inaccessible
Accuracy of 'fix' by two point problem, is A. bad B. good C. not reliable D. unique.
C. not reliable
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.
C. on the circumference of the circumscribing circle
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. plan table surveying
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.
C. said to have parallax
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. these remain constant.
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. to avoid long offsets from chain lines
Centering error of a theodolite produces an error A. in all angles equally B. which does not vary with the direction or pointing C. which varies with the direction of pointing and inversely with the length of sight D. none of these.
C. which varies with the direction of pointing and inversely with the length of sight
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
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. all the above.
Pick up the correct statement from the following : A. 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 B. 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 C. a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight D. 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 E. all the above.
E. all the above.
Pick up the correct statement from the following : A. the length of the brass handle is included in the length of chain B. the handles are on swivel joints to prevent twisting of the chain C. the fifth tag from either end of the chain is numbered 5 D. the length of the Gunter's chain is 66 ft. E. all the above.
E. all the above.
In levelling operation A. if second reading is more than first, it represents a rise B. if first reading is more than second, it represents a rise C. if first reading is less than second, it represents a fall D. if second reading is less than first, it represents a fall E. both (b) and (c).
E. both (b) and (c).
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.
E. none of these.
