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Machine Design

Machine Design
Screws used for power transmission should have

Strong teeth
High efficiency
Very fine threads
Low efficiency

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Machine Design
The application of second type levers is found in

Hand wheel of a punching press
A pair of tongs
Lever of a loaded safety valve
Handle of a hand pump

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Machine Design
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called

Fatigue strength
Comformability
Bondability
Embeddability

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Left hand
Both A and B
None of these
Right hand

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

90°
160°
180°
135°

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Machine Design
The railway carriage couplings have

Square threads
Knuckle threads
Buttress threads
Acme threads

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