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The reduced bearing of a line is N 87° W. Its whole circle bearing is
273°
The total change in level along the line is equal to total back sights
All
The apparent error on reversal is
Twice the actual error
Total latitude of a point is positive if it lies
North of the reference parallel
The constant vertical distance between two adjacent contours, is called
Contour interval
The theodolites used for making tacheometric observations by optical wedge system, are
Fitted with a glass wedge in front of telescope.
Tilt of the staff in stadia tacheometry increases the intercept if it is
Away from the telescope pointing up-hill
The distance between contour lines on a topo map is called the
Contour interval
The system of lines used to locate a certain place on Earth are called...
Coordinate systems
Topographic contour lines that are closer together than other contour lines indicate what?
Steeper slopes
Topographic maps that are bounded by lines of latitude and longitude are called
____________ maps.
Quadrangle
The North end of the compass needle ALWAYS points toward what direction?
Magnetic North
The index pin is used to adjust what feature on the Bruton compass?
The circular grid for magnetic declination
The difference between a level line and a horizontal line is that
Level line is a curved line while hori-zontal line is a straight line
The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be
Equidistant from A and B
The temporary adjustments of a prismatic compass are i) Centering ii) Levelling iii) Focusing the prism The correct order is
(0, (ii), (iii)
The series of nearly, spaced contour lines represents a
Steep slope
The error due to eccentricity of inner and outer axes can be eliminated by
Reading both verniers and taking the mean of the two
The cross hairs in the surveying telescope are placed
Much closer to the eye-piece than to the objective lens
The following sights are taken on a "turning point"
Foresight and backsight
Theodolite is an instrument used for
Measurement of both horizontal and vertical angles
The prismatic compass and surveyor's compass
Give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
The horizontal angle between the true meridian and magnetic meridian at a place is called
Declination
The angle of intersection of the two plane mirrors of an optical square is
Ordm;
The allowable length of an offset depends upon the
All of the above
The adjustment of horizontal cross hair is required particularly when the instrument is used for
Leveling
The process of turning the telescope about the vertical axis in horizontal plane is known as
$$swinging
The correction for sag is
Always subtractive
The bearings of the lines AB and BC are 133° 30' and 49° 30'. The included angle ABC is
96°
The bearings of the lines AB and BC are 279° 20' and 186° 20'. The included angle ABC is
87°
The length of a chain is measured from
Outside of one handle to outside of other handle
The maximum tolerance in a 20 m chain is
Mm
The permissible error in chaining for measurement with chain on rough or hilly ground is
In 250
U
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Sag correction is | | | Under ordinary conditions, the precision of a theodolite traverse is affected by |