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While doing levelling in undulating terrain, it is preferable to set the level on
If the horizontal distance between the staff point and the point of observation is d, then the errordue to curvature of earth is proportional to
An imaginary line lying throughout the surface of ground and preserving a constant inclination tothe horizontal is known as
Which of the following methods of contouring is most suitable for a hilly terrain ?
The process of determining the locatins of the instrument station by drawing resectors from the locations of the known stations is called
The methods used for locating the plane table stations are
1. radiation
2. traversing
3. intersection
4. resection
The correct answer is
If in a closed traverse, the sum of the north latitudes and also the sum of west departures ismore than the sum of the east departures, the bearing of the closing line is in the
Consider the following assumptions of Bowditch Method:
1. Error in linear measurements are proportional to √l
2. Correction to latitude or departure of anyside = Total error in L (or) D x Length of that side / Perimeter of traverse
3. Angular Measurements are more precise than linear Measurements
4. Linear Measurements are more precise than angular measurements
Bowditchs rule is used to balance a traverse when the linear and angular measurements are equally precise.It is assumed that angular and linear meaurements errors are proportional to 1/√L and √L respectively.
For a tacheometer the additive and multiplying constants are respectively
The radial offset at a distance X from the point of commencement of curve of radius R is given
by
If r is the radius of curvature at any point of a transition curve and l is the distance from thebeginning of the transition curve to that point, then for ideal transition
If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is
The relationship between tropical year TY ad sidereal year SY is
When the wind effect is not considered during flight planning, the result is a
100.Setting out of bridges involves determination of
1. length of centre line
2. height of piers
3. direction of centre line
4. position of piers
Of these statements
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