Surveyor Compass And Prismatic Compass
The greatest advantage of this compass is both sighting and reading can be done.
Surveyor compass and prismatic compass. Best door design in 2020 modern and classic 2. There is a prism at viewing end. You may also like.
The important parts and the construction of surveyor compass are similar to that of a prismatic compass except for the following points. A magnetic needle is provided which can freely rotate above. Water cement ratio of concrete source of undesirable water in.
Quality tests on cement at laboratory and at construction site 4. Unlike a prismatic compass it has a narrow slit at the viewing end. Components of surveyor compass.
Graduation circle is fixed to broad type needle. Different grades of cement opc 33 43 53 3. 1 whereas the prismatic compass consists of a reflecting prism along with the eye vane the surveyor s compass consists of only a narrow vertical slit instead of a prism.
Hence it will not rotate with the line of sight. A surveyor compass essentially consists of a graduated circle or disc fitted to a box. It contains a prism which is used for accurate measurement of readings.
Then the sight of the line is fixed and the reading is directly taken from the top of the glass. The least count of surveyor compass is 15 i e. Sighting and reading can be done simultaneously.
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