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Machine Design

Machine Design
The wear load should be __________ the dynamic load.

Less than
Greater than
None of these
Equal to

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Machine Design
In most machine members, the damping capacity of the material should be

Low
High
Could be anything
Zero

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Machine Design
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

Left hand
None of these
Right hand
Both A and B

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Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

(k₁ - k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ k₂)/ (k₁ + k₂)

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

None of these
Shear stress
Longitudinal stress
Circumferential stress

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Machine Design
The cross-section of the arm of a bell crank lever is

Rectangular
Any one of these
Elliptical
I-section

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