Civil Engineering :: Surveying
- Which of the following errors can be eliminated by taking mean of bot face observations ?
- The scale of a vertical photograph of focal length ‘f’ taken from height of ‘H’ metres above M.S.L., at a point of reduced level ‘h’, is
- Perspective centre relates to
- Circumpolar stars
- The rise and fall method of levelling provides a complete check on
- Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
- In direct method of contouring, the process of locating or identifying points lying on a contour is called
-
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to
i) altitude bubble on index frame
ii) altitude bubble on index frame if it is to be used as a level
iii) altitude bubble on telescope
iv) altitude bubble on telescope if it is to be used as a level
The correct answer is -
In the cross-section method of indirect contouring, the spacing of cross-sections depends upon
i) contour interval
ii) scale of plan
iii) characteristics of ground
The correct answer is - Height of instrument method of levelling is
Whatsapp
Facebook
