Machine Design
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Is minimum at zero speed and increases monotonically with increase in speed
Is maximum at zero speed and decreases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed
Remains constant at all speeds

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Split nut is a locking device in which

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the belt speed increases

Power transmitted remains the same
Power transmitted increases
Power transmitted decreases
Power transmitted increases to a maximum value and then decreases

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In composite or reverse laid ropes

Direction of twist of wires and strands are same
Wires are not twisted
Wires in two adjacent strands are twisted in opposite direction
Direction of twist of wires in strands is opposite to the direction of twist of strands

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Machine Design