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Machine Design

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

Any one of these
I-section
Elliptical
Rectangular

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Machine Design
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?

Universal coupling
Bushed pin type coupling
All of these
Oldham coupling

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

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Machine Design
The material commonly used for machine tool bodies is

Cast iron
Brass
Aluminium
Mild steel

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Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Flat saddle key
Woodruff key
Feather key
Hollow saddle key

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Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

σ + √(σ² × 4τ²)
(1/2) × √(σ² × 4τ²)
√(σ² × 4τ²)
(1/2) × [σ + √(σ² × 4τ²)]

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