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A sliding bearing which operates without any lubricant present, is called

A. zero film bearing
B. boundary lubricated bearing
C. hydrodynamic lubricated bearing
D. hydrostatic lubricated bearing

Option A

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The backlash for spur gears depends upon A. module B. pitch line velocity C. tooth profile D. both (a) and (b)	When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be A. square threads B. acme threads C. knuckle threads D. buttress threads