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Machine Design

Machine Design
For tight leakage joints, following type of thread is best suited

NPT (national pipe threads).
Metric
Buttress
Square

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Machine Design
Which of the following is an anti-friction bearing?

Needle bearing
Journal bearing
Pedestal bearing
Collar bearing

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Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

8°
25°
15°
5°

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Machine Design
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.

Either A or B
Partially
None of these
Fully

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Machine Design
The application of third type levers is found in

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

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Machine Design
In radial cams, the follower moves

In any direction irrespective of cam axis
Along the cam axis
In a direction perpendicular to the cam axis
In a direction parallel to the cam axis

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