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Machine Design

Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

120°
180°
270°
360°

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Machine Design
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as

Both the ends hinged
Both the ends fixed
One end fixed and the other end hinged
One end fixed and the other end free

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Machine Design
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

0.65
0.45
0.75
0.55

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

F + P
P
F
F.P

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Machine Design
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Vickers
Rockwell
None of these
Brinell

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Machine Design
The stress induced in the belt is,

Torsional shear stress
Tensile stress
Direct shear stress
Compressive stress

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