Levelling

The cross hairs in the surveying telescope are placed

• Mid way between eyepiece and objective lens

• Much closer to eye piece than object lens

• Much closer to object glass than eye piece

• Anywhere between object glass & eye piece

In surveying telescope, diaphragm is held

• Inside the eyepiece

• Inside the objective

• Nearer to eyepiece

• Nearer to the objective

An internal focusing surveying telescope may be focused by the movement of

• Concave lens in the telescope

• Objective glass of the telescope

• Plano convex lens of the telescope

• Convex lens in the telescope

Which among the following is not a reversible level

• Y level

• Tilting level

• Cookes reversible level

• Cushings level

A levelling instrument is used to establish

• Vertical line of sight

• Horizontal line of sight

• Location of points

• Distance of points

The real image formed by the objective must be

• In the plane of cross wire

• At the centre of objective

• On the staff

• Non of these

Cross section and longitudinal sectioning is

• Check levelling

• Differential levelling

• Simple levelling

• Profile levelling

If the BS reading at point A is greater than the FS reading at point B then,

• A is higher than B

• B is higher than A

• Height of the instrument is required to know which point is higher

• Instrument position is required to know which point is higher

The elevation difference between 2 points may be found by noting the difference in boiling point of water in 2 places

• Barometric levelling

• Hypsometric levelling

• Trignometric levelling

• Spirit levelling

In the working profile of a longitudinal section, the depth of cutting are written in

• Red

• Green

• Blue

• Black