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Machine Design

Machine Design
The groove angle of pulleys for V-belt is

300 to 320
420 to 450
More than 400
340 to 360

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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
Fully
Partially
None of these

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

3d/4
d/2
d/4
d/3

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Machine Design
In radial bearings, the load acts __________ to the axis of rotation.

Perpendicular
None of these
Both A and B
Parallel

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Machine Design
Which of the following cotter joint will be used to connect strap end of a connecting rod?

Any one of these
Spigot and socket cotter joint
Gib and cotter joint
Sleeve and cotter joint

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

2 τ
4 τ
τ/2
τ

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