Machine Design
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,

Helical gearing
Worm gearing
None of these
Bevel gearing

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Machine Design
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Move towards right of the bearing making no metal to metal contact
Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing
Move towards right of the bearing making metal to metal contact

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Machine Design
Split nut is a locking device in which

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
A slot is cut partly in middle of nut and then slot reduced by tightening screw
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

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