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.
The obstacles that the students of civil engineering face when it comes to produce a good piece of writing in English
Calculate the Total Duration for the Four Activity Project Solution: Scheduling work activity has associated time duration. The durations shown in the Table were e
Phases are usually identifiable because of adifference in density which causes gravitational separation. e.g. Ice floats on water, steam rises.
Question In linking fenders to pier organizations, would single lock nuts or double lock nuts be used? Answer In pier structures connection offenders to piers is a
The plan of a proposed spoil heap is shown in Fig. The heap will stand on a thick deposit of soft clay with E-value 15 MN/m 2 . The uniform pressure on the soil may be suppose as 1
defference between direct and indirect ranging..
A retaining wall 12 metres high is proposed to hold sand. The values of void ratio and φ in the loose state are 0.63 and 30° whereas they are 0.42 and 40° in the dense state. Suppo
Q. Define water content, void ratio and dry density of a soil. If wet density of a soil is 1.9 gm per cm at a moisture content of 24%, what will be its dry density? Ans. - W
Keywords of Road Pavements: Pavement : That part of a road which structurally supports the vehicles travelling on a road. Flexible Pavement : A layered system of pave
support upper floor
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