adjustment of altitude bubble and vertical index frame adjustment of plate levels adjustment of line of sight adjustment of horizontal axis
Answer Discuss in Comment
half the true error four times the true error equal to true error two times the true error
line parallel to the mean spheroidal surface of earth line passing through the center of cross hairs and the center of eye piece horizontal line line passing through the objective lens and the eye-piece of a dumpy or tilting level
100.345 m 101.870m 100.655m 99.345 m
is not suitable for levelling with tilting levels quicker and less tedious for large number of intermediate sights provides a check on the reduction of intermediate point levels is less accurate than height of instrument method
true R.L. more than true R.L. less than true R.L. none of the above
level line is a curved line while horizontal line is a straight line level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line horizontal line is normal to plumb line while level line may not be normal to the plumb line both are same
backsight intermediate sight foresight all of the above
foresight only backsight only foresight and backsight foresight and intermediate sight
the magnetic needle moves with the box the line of the sight does not move with the box the magnetic needle and graduated circle do not move with the box the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction
"Scientists dream about doing great things. Engineers do them."
