1, describe the methode of reducing the levels and thier relative advantages and disadvantages
2, writetypes of levelling instruments and methodes of leveling
I'm guessing you are doing the same course as me!!This was a help to me: from google books. I hope this link works, if not try searching for comparisson of HOC & R&F methods.http://books.google.com/books?id=hqFcPbmmxC4C&pg=PA131&lpg=PA131&dq=Reducing+levels+by+rise+and+fall+method&source=web&ots=F7x3jGi-MV&sig=zi7JVYCBLT8-z42OKfst2XFIK-o&hl=en&sa=X&oi=book_result&resnum=1&ct=resultGood luckPetep.s if you find any more info please get back to methanks Pete.your links did works for me...
Generally with a level. 1/8 inch to the foot. If you have a known level such as the top of the foundation, you could measure from the floor joist and be close enough. For long distances, a surveying transit is used.
Yes, but it is an indirect process requiring two operators- or at least a fixed surveying target on which the surveyor aligns his Stadia wires ( popularily Cross hairs) There are different scales but a base-line of l00 feet and in some cases l00 power is increasingly standard. consulting a table and some number-juggling is needed to get the distance, and more importantly the Vertical rise and Fall ( gradient, up or down) The theodolite is better adapted to this type of surveying, than a mere ( range finder)- which is can be used for- but with some shifting of tactics and technique. The basic tables in the technical manuals assume a base line distance of l00 feet, then there are angles, etc.
Sure, if the cables break, it can fall.
It is a device used for industrial fall protection (Height Safety). Standardconfigurationis a drum containing wire-rope or high strength synthetic webbing. The drum plays out or retracts the cable/webbing as a worker moves through a verticalenvironment. If the worker should "Slip or Fall", the device senses the downwardacceleration and locks up, preventing the fall. Most devices also include some type of braking/energyabsorbingfunction to limit the forces on the human body and anchorage point of the device.Was originally designed and used in the early part of the 20thcenturyfor use in the mines in and around SALA Sweden. Still in use today with great reputation as being the best method of "Fall Arrest".
the advantages of this method was that it is more quick and less calculation needed and the disadvantages, it less accurate compare to the rise and fall method.
I'm guessing you are doing the same course as me!!This was a help to me: from google books. I hope this link works, if not try searching for comparisson of HOC & R&F methods.http://books.google.com/books?id=hqFcPbmmxC4C&pg=PA131&lpg=PA131&dq=Reducing+levels+by+rise+and+fall+method&source=web&ots=F7x3jGi-MV&sig=zi7JVYCBLT8-z42OKfst2XFIK-o&hl=en&sa=X&oi=book_result&resnum=1&ct=resultGood luckPetep.s if you find any more info please get back to methanks Pete.your links did works for me...
The advantages are that students are learning more material in order to be better prepared and more educated. Disadvantages are that there is more material to cover in the same amount of time and students may fall behind.
advantages: fast easy neat disadvantages: hard to replace if they fall off sometimes hard to put them together can catch yourself or stuff when you put them together
The advantages are along time ago you could get across the ocean like when they didnt have planes, you could go on a trip and just sail. The disadvantages are you could fall over board and like the titanic you could crash and sink!
The rise and fall method is advantageous for its clarity and straightforwardness in tracking changes in elevation, making it easy to understand for surveyors and engineers. It also allows for the direct calculation of levels between points without requiring complex calculations. However, its disadvantages include being time-consuming for long distances and being less effective in areas with significant terrain variations, as it may require multiple setups and adjustments. Additionally, errors can accumulate if not carefully managed, potentially leading to inaccuracies in the final results.
Leveling in surveying is important to get an accurate measurement. The rise and fall of the grade will cause the measurements to be off, resulting in an inaccurate measurement of plots of land.
*the advantages are u feel real supreme..your feel energetic..it depends on what mood your in when you take it..gives you a fun super high *the disadvantages are you feel quesy afterwards..you notice your high dropping which is depressing b/c you want to feel high again..some ppl just crash & fall sleep
You might fall and break it Weather, heat, cold, humidity, rain, snow and wind will all have possible negative impacts.
advantages: fast easy neat disadvantages: hard to replace if they fall off sometimes hard to put them together can catch yourself or stuff when you put them together
Although notice board has various advantages but there are certain disadvantages too, which one can't ignore these are the following:It can easily fall into neglectIt can becomes untidy and irrelevant as the time passesIts effectiveness depends upon the reader curiosity.
There are numerous advantages of rainfall. Rainwater is a major fresh water source, and is excellent in a survival situation. Rainwater also helps crops grow.The disadvantages of rain fall is that excess rainfall can cause floods and may become cause of large traffic jams on road.