The most suitable bearing for carrying very heavy loads at slow speed is

Question

Question

This question was previously asked in

BPSC Asstt. Prof. ME Held on Nov 2015 (Advt. 22/2014)

Answer 1

Explanation:

The sliding contact bearing, according to the thickness layer of lubricant between bearing and journal are mentioned as follows.

Film	Property
Thick Film Bearing	The thick film bearings are those in which the working surfaces are completely separated from each other by the lubricant. They are also known as hydrodynamics lubricated bearing.
Thin Film Bearing	The thin film bearings are those in which, although lubricant is present, the working surface partially contact each other at least part of the time. They are also known as boundary lubricated bearings.
Zero Film Bearing	The zero film bearings are those which operate without any lubricant present.
Hydro-static Bearing	The hydro-static bearings are those which can support heavy loads without any relative motion between the journal and the bearing, therefore it is suitable for carrying heavy loads. This is achieved by forcing externally pressurised lubricant between the members.