Cross-staff is used for
1.setting out right angles
2.measuring contour gradient
3. taking levels
4. measuring distances
4.none of these
Back bearing of a line is equal to
1.Fore bearing ± 90°
2.Fore bearing ± 180°
3.Fore bearing ± 360°
4.Fore bearing ± 270°
1.Align b through a and draw a ray towards c, align a through b and draw a ray towards c, finally align c through the point of intersection of the previously drawn rays
2.Align c through a and draw a ray towards b, align a through c and draw a ray towards b, finally align b through the point of intersection of the previously drawn rays
3.Align c through b and draw a ray towards a, align b through c and draw a ray towards a, finally align a, through the point of intersection of the previously, drawn rays
4. In the first two steps any two of the points may be used and a ray drawn towards the third point, which is sighted through the point of intersection of previously drawn rays in the final step.
1. additive constant is 100, multiplying constant is zero
2.multiplying constant is 100, additive constant is zero
3.both multiplying and additive constants are 100
4.both multiplying and additive constants are 50.
Ramsden eye-piece consists of
1.two convex lenses short distance apart
2.two concave lenses short distance apart
3.one convex lens and one concave lens short distance apart
4.two plano-convex lenses short distance apart, with the convex surfaces facing each other.
1.decreases with decrease of slope
2.increases with increase of slope
3.decreases with increase of slope
4.decreases with decrease of weight of the chain.
A clinometer is used for
1.measuring angle of slope
2.correcting line of collimation
3.setting out right angles
4. defining natural features.
1.rotation axis is vertical to the transit axis
2.transit axis is perpendicular to line of collimation
3.line of collimation sweeps out a vertical plane while the telescope is elevated or depressed
4.all the above
A traverse deflection angle is
1.less than 90°
2.more than 90° but less than 180°
3.the difference between the included angle and 180°
4.the difference between 360° and the included angle.
1.greater at equator than nearer the poles
2. less at equator than nearer the poles
3. less in summer than in winter
4.same at all latitudes and during different months.
1.numbers of operations involved
2.reciprocal of operations involved
3.square root of the number of operation involved
4.cube root of the number of operation involved.
If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as
4. simple vernier.
1.of relatively larger radius
2.of relatively smaller radius
In an internal focusing telescope
1. the objective is at a fixed distance from the diaphragm
2.the focusing is done by the sliding of a divergent lens.
3.the focusing divergent lens is situated at about the middle of the tube
4.all the above.
2.non-adjustment of line of collimation
4.non-adjustment of the bubble tube.
In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to
1. ease of reduction of observations
2.facility of holding
3. minimum effect of careless holding on the result
4. none of these
1.A level surface is perpendicular at all points to the direction of gravity
2.A level line lies in level surface
3.A horizontal surface is normal to the direction of gravity at only one point
4.All the above.
1.the lines of sight while observing back sight and fore sight lie in the same horizontal plane
2.the staff readings are measurements made vertically downwards from a horizontal plane
3.the horizontal plane with reference to which staff readings are taken, coincides with the level surface through the telescope axis
4. all the above.
1.in the earth's magnetic field, a magnetic needle rests in magnetic meridian
2.the angle between the true meridian and the magnetic meridian is called magnetic variation
3.one end of the magnetic needle supported at its centre of gravity tends to dip down towards the. nearer magnetic pole of the earth
4.all the above.
1.If the slope of the curve of a mass diagram in the direction of increasing abscissa is downward, it indicates an embankment
2.The vertical distance between a maximum ordinate and the next forward maximum ordinate represents the whole volume of the embankment
3.The vertical distance between a minimum ordinate and the next forward maximum ordinate represents the whole volume of a cutting
4.all the above.
1.it is provided with a better magnetic needle
2. it is provided with a sliding glass in the object vane
3. its graduations are in whole circle bearings
4.it is provided with a prism to facilitate reading of its graduated circle
3.the objective and the eye-piece
4. none of these
Simpson's rule for calculating areas states that the area enclosed by a curvilinear figure divided into an even number of strips of equal width, is equal to
1. half the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets, and thrice the sum of the even offsets
2.one third the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets
3.one third the width of a strip, multiplied by the sum of two extreme offsets, four times the sum of the remaining odd offsets, and twice the sum of the even offsets
4.one sixth the width of a strip, multiplied by the sum of the two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets
1.middle station is nearest
2.middle station is farthest
3.either the right or left station is nearest
4. none of these.
1.point of tangency
2.point of commencement
3.point of intersection
4.mid-point of the curve
The bubble tube is nearly filled with
1.alcohol or chloroform
2. a liquid which is very mobile
3. a liquid having low freezing point
4. a liquid having low freezing point
3. double refraction
The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known
1.a simple curve
2. a compound curve
3. a reverse curve
4.a vertical curve.
1.along the contour
2.at an angle of 45° to the contour
3. at right angles to the contour
4.none of these
The least count of a vernier scale is
1.sum of the smallest divisions of main and vernier scales
2.value of one division of the primary scale divided by total number of divisions of vernier scale
3.value of one division of vernier scale divided by total number of divisions of primary scale
4.none of these.
The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto
The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is
The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescope's
1. resolving power
3.field of view
The slope correction may be ignored if
1.the slope of the ground is less than 3°
2.to slope of the ground is say 1 in 19
3. both (a) and (b)
4. neither (a) nor (b)
The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at
1.every point of the bubble
2.either end of the bubble
3.the mid-point of the bubble
The true meridian of a place is the line in which earth's surface is intersected by a plane through
1.east and west points
2. zenith and nadir points
3.north and south geographical poles
4.north and south magnetic poles.
Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling
1.vision gets obstructed
2. chaining gets obstructed
3.both vision and chaining get obstructed
4.all the above.
While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates
1. the rotation axis is vertical
2.the trummion axis is horizontal
3.the line of collimation is perpendicular to vertical axis
4.none of the above