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Machine Design

Machine Design
Whether any core is required in wire ropes

Yes
Sometimes
Rarely
No

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Pressure angle
None of these
Pitch lead angle
Helix angle

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(8WD/ πd3) × K
(4WD/ πd3) × K
(WD/ πd3) × K
(2WD/ πd3) × K

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Increasing the cross-section area of bar
Remain unaffected with cross-section area
Decreasing the cross-section area of bar
Would depend upon other factors

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Machine Design
Which of the following welded joint is designed for shear strength?

Transverse fillet welded joint
Butt welded joint
Parallel fillet welded joint
All of these

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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

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

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