Machine Design
A stud

Has both the ends threaded
Has a head on one end and a nut fitted to the other
Has pointed threads
Has head at one end and other end fits into a tapped hole in the other part to be joined

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Jam 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
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening a screw

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Cold working

Increases the fatigue strength
Has no influence on fatigue strength
Alone has no influence on fatigue strength
Decreases the fatigue strength

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Machine Design