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Machine Design

Machine Design
The expansion joint is mostly used for pipes which carry steam at __________ pressures.

High
None of these
Low
Medium

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Machine Design
The design of shafts made of brittle materials is based on

Rankine's theory
Guest's theory
St Venant's theory
Von Mises theory

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Machine Design
When a bolt is subjected to an external load, the stress induced in the bolt will be

Shear stress
Combined tensile and shear stress
Tensile stress
Any one of these

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Machine Design
A tube has the following advantage over pipe

Smoother inside walls
Greater shock absorption
All of these
Lighter and easier to handle

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Machine Design
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

Four times
Three times
Equal to
Twice

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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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