Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
QuestionWhy Poly tetra fluoro ethylene (PTFE) is usually used in sliding bearings? AnswerThe choice of sliding surface of bearings is of very important importance since sliding surfaces generate frictional forces that are exerted on bearings and substructure of bridge. For example, PTFE and lubricated bronze are usually choices of sliding surfaces for bearings. PTFE is fluro carbon polymer which possesses high-quality chemical resistance and be able to function in wide range of temperature. On whole significant characteristic of this material is its low coefficient of friction. PTFE has slightest possible coefficients of static and dynamic friction of any solid with absence of stick-slip movement by David J. Lee. The coefficient of friction is established to decrease with add to in compressive stress. However, PTFE contain some demerits like high thermal development and low compressive strength. In designing complementary contact plate with PTFE sliding surface, stainless steel plates are in general selected where plates have to be larger than PTFE surface to let movement without exposing PTFE. Moreover, it is recommended that stainless steel surface be located on top of PTFE surface to avoid contamination of dirt and rubbish. Lubricants are now and then introduced to decrease friction between PTFE surface and upper stainless steel plate. Hence, PTFE might be designed with dimples to keep away from lubricant from squeezing out under repeated conversion movements.
Q. Grouting in segmental linings in tunnels? Grouting is typically carried out under pressure in segmental linings at the time of tunnel construction due to the below reasons:
rectangular grid method for representing contours
Q. Method of observation by satellite? The difference between a photographs and imageries needs to be understood first. A photograph covers a specific area within its view and
what are the cement testing?
Features of literary writing
Question Will it advantageous to use concrete of very high power for example exceeding 60MPa? What are potential problems connected with high strength concrete ? Answer To in
Design a 10 unit rapid sand filter system for a flow of 6.3 MGD with a filtration rate of 2 gpm/sq ft. and an L: W ratio of 1.3. Design flow (Q) = 6.3 MGD = 6.3x106 gpd =
Q. Write short notes on Bulking of Sand? Volume of sand fluctuates with variations in moisture content when sand is wet then each particle sets coating of water due to surface
What is compacting factor
Explain the term - Loss of Prestress At the transfer stage, tendons produce compressive stresses in concrete. Sooner or later, the magnitude of these stresses experiences a re
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd