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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

None of these
Same
Double
Half

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Machine Design
A bolt is designed on the basis of __________ with a large factor of safety.

Direct compressive stress
Direct bending stress
Direct tensile stress
Direct shear stress

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Tightening it properly
Making shank diameter equal to core diameter of thread
Grinding the shank
Increasing shank diameter

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Machine Design
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

Thick film
Thin film
Either A or B
None of these

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Machine Design
If P1 and P2 are the tight and slack side tensions in the belt, then the initial tension Pi (according to Barth) will be equal to (Where, Pc is centrifugal tension)

⅟₂× (P1 + P2)
[(√P1 + √P2)/2]²
P1 + P2
[⅟₂ × (P1 + P2)] + Pc

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Machine Design
A connecting rod subjected to an axial load may buckle with

X-axis as neutral axis
Y-axis as neutral axis
Z-axis
X-axis or Y-axis as neutral axis

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